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CN114604087A - Braking system of direct-drive electric engineering vehicle and control method thereof - Google Patents

Braking system of direct-drive electric engineering vehicle and control method thereof Download PDF

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Publication number
CN114604087A
CN114604087A CN202210462098.7A CN202210462098A CN114604087A CN 114604087 A CN114604087 A CN 114604087A CN 202210462098 A CN202210462098 A CN 202210462098A CN 114604087 A CN114604087 A CN 114604087A
Authority
CN
China
Prior art keywords
brake
valve
hydraulic
braking
braking mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210462098.7A
Other languages
Chinese (zh)
Inventor
张国新
黄晓
陈云宇
张晓平
王贞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LIUGONG WUXI ROAD SURFACE MACHINERY CO Ltd
Original Assignee
LIUGONG WUXI ROAD SURFACE MACHINERY CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LIUGONG WUXI ROAD SURFACE MACHINERY CO Ltd filed Critical LIUGONG WUXI ROAD SURFACE MACHINERY CO Ltd
Priority to CN202210462098.7A priority Critical patent/CN114604087A/en
Publication of CN114604087A publication Critical patent/CN114604087A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/006—Dynamic electric braking by reversing current, i.e. plugging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/70—Electrical control in fluid-pressure brake systems by fluid-controlled switches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/341—Systems characterised by their valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/343—Systems characterised by their lay-out
    • B60T8/344—Hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3605—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force wherein the pilot valve is mounted in a circuit controlling the working fluid system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2220/00—Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof
    • B60T2220/04—Pedal travel sensor, stroke sensor; Sensing brake request

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

The invention discloses a brake system of a direct-drive electric engineering vehicle and a control method thereof, wherein the brake system comprises a drive axle, a drive motor and a hydraulic brake system, the hydraulic brake system comprises brake calipers, a brake pedal, a hydraulic brake valve and an energy accumulator, the brake calipers are arranged on the drive axle, the energy accumulator is connected with the brake calipers through the hydraulic brake valve, and the brake pedal controls the on-off of the hydraulic brake valve; the driving motor is connected with the input end of the drive axle and is a motor generator. Has the advantages that: according to the invention, the transmission efficiency is improved by directly connecting the driving motor with the driving bridge, and the driving motor is a motor generator and can realize braking and recovery of braking energy of the whole machine under the braking working condition, so that the energy consumption of the whole machine is reduced; under the condition of meeting the existing operation habits, an automatic braking scheme is added, and the intelligent degree of the braking system is improved.

Description

Braking system of direct-drive electric engineering vehicle and control method thereof
Technical Field
The invention relates to a brake system of an engineering vehicle, in particular to a brake system of a direct-drive electric engineering vehicle, and belongs to the technical field of engineering machinery.
Background
China is a large country for producing and using engineering machinery, about 900 thousands of machines are reserved at present, and the method is widely applied to the fields of infrastructure, industry, electric power, mines, ports and the like. Most of these devices are powered by conventional diesel internal combustion engines, have high carbon emissions, and are frequently used as production data. The emission of pollutants in the engineering machinery field accounts for 14% of the emission of all mobile emission sources, and is one of the most serious pollution sources in global climate. Therefore, the engineering machinery electromotion is a necessary trend for the engineering machinery industry to develop.
At present, the common walking driving mode in the industry is that a motor drives a walking pump, the pump drives a driving motor, and then a driving motor drives an axle to realize the walking of the vehicle. However, the driving mode has the problems of low transmission efficiency and high energy consumption, and only the traditional caliper type braking mode can be adopted, the braking energy is lost in the braking process in a friction heating mode, the recycling of the braking energy is not facilitated, and the energy consumption of the electric whole machine is improved.
When the gear of the hydraulically driven engineering vehicle is switched, the gear is in the neutral position, the whole machine is in a braking working condition due to the damping effect of the hydraulic system, but the braking energy cannot be recovered by the hydraulic braking, and the service life of a hydraulic element can be influenced.
Disclosure of Invention
The invention aims to: the invention aims to solve the problems in the prior art and provides a braking system of a direct-drive electric engineering vehicle and a control method thereof.
The technical scheme is as follows: a brake system of a direct-drive electric engineering vehicle comprises a drive axle, a drive motor and a hydraulic brake system, wherein the hydraulic brake system comprises brake calipers, a brake pedal, a hydraulic brake valve and an energy accumulator, the brake calipers are installed on the drive axle, the energy accumulator is connected with the brake calipers through the hydraulic brake valve, and the brake pedal controls the on-off of the hydraulic brake valve; the driving motor is connected with the input end of the drive axle and is a motor generator.
According to the invention, the transmission efficiency is improved by directly connecting the driving motor with the driving bridge, and the driving motor can realize braking of the whole machine and recovery of braking energy when the motor generator is in a braking working condition, so that the energy consumption of the whole machine is reduced.
Preferably, in order to further realize braking of the whole machine and recovery of braking energy, the driving motor is connected with a controller assembly, the controller assembly comprises a controller body and a motor controller, the controller body controls the working mode of the driving motor by controlling the motor controller, and when the driving motor is in the braking mode, the driving motor charges a storage battery of the whole machine.
Preferably, in order to improve the intelligent degree of the brake system, the hydraulic brake system comprises an electromagnetic proportional brake valve connected with the hydraulic brake valve in parallel, a hydraulic control stop valve is arranged between the hydraulic brake valve and the brake calipers, and a linkage stop valve is arranged between the electromagnetic proportional brake valve and the brake calipers; the controller body controls the on-off and opening of the electromagnetic proportional brake valve; the hydraulic brake valve and the linkage stop valve are simultaneously controlled by the brake pedal, when the brake pedal is not stepped, the hydraulic brake valve is in an initial state, an oil way where the hydraulic control stop valve is located is disconnected, and meanwhile, the linkage stop valve is connected; when the brake pedal is stepped on, the linkage stop valve cuts off an oil supply path where the electromagnetic proportional brake valve is located, and meanwhile, the hydraulic control stop valve conducts the oil supply path between the hydraulic brake valve and the brake caliper.
When a driver takes a braking measure actively, the driver steps on a brake pedal, the energy accumulator supplies oil to the brake calipers through the hydraulic brake valve and the hydraulic control stop valve, active braking is realized, and an electric control brake oil way is cut off; when a driver does not actively take braking measures under the braking working condition, the controller body controls the electromagnetic proportional brake valve to be conducted, and the energy accumulator supplies oil to the brake calipers to realize automatic braking; under the condition of meeting the existing operation habits, an automatic braking scheme is added, and the intelligent degree of the braking system is improved.
Preferably, in order to ensure that the accumulator maintains stable pressure, the hydraulic braking system comprises a charging valve assembly, and the accumulator is connected with the whole hydraulic system through the charging valve assembly. The accumulator can obtain stable pressure by introducing oil of a hydraulic system of the whole machine, and a hydraulic system special for braking is not required to be additionally arranged, so that the cost is saved.
Preferably, in order to improve the safety of the whole machine, oil is preferentially supplied to a braking system to ensure that an oil accumulator maintains stable pressure, the liquid filling valve assembly comprises a priority valve, a pressure regulating valve and a one-way valve, a main control oil path of the priority valve is connected with the hydraulic system of the whole machine, a control oil path on one side of the priority valve is connected with the hydraulic system of the whole machine, and a control oil path on the other side of the priority valve is connected with the hydraulic system of the whole machine through the pressure regulating valve; the energy accumulator is connected with a whole machine hydraulic system through a one-way valve; the control oil circuit of the pressure regulating valve is connected with the energy accumulator, the set pressure value of the pressure regulating valve is equal to the set value of the energy accumulator, when the pressure value of the control oil circuit of the pressure regulating valve is smaller than the set pressure value, the pressure regulating valve is communicated with the control oil circuits on two sides of the priority valve, the priority valve cuts off the oil circuit of the whole hydraulic system, when the pressure value of the control oil circuit of the pressure regulating valve is larger than or equal to the set pressure value, the control oil circuit on one side of the priority valve, which is connected with the pressure regulating valve, is connected with the oil tank, and the priority valve is communicated with the oil circuit of the whole hydraulic system.
Preferably, in order to avoid the impact of sudden change of the pressure value on the energy accumulator and the hydraulic system of the whole machine, the priority valve is a three-position two-way valve, the two sides of the priority valve are respectively a stop position and a communication position, and the middle position is provided with a throttle valve. A throttling position is arranged between the cut-off position and the communicating position, so that the impact can be effectively reduced, the service life of a hydraulic element is prolonged, and the operation comfort of the whole machine is improved.
Preferably, in order to realize the judgment of the braking working condition, a pressure sensor is arranged at a pressure oil inlet of the brake caliper, a displacement sensor for detecting the displacement of the brake pedal is arranged below the brake pedal, and the pressure sensor and the displacement sensor are respectively connected with the controller body.
A control method of a brake system of a direct-drive electric engineering vehicle comprises the following steps:
step one, judging the braking condition, namely preliminarily judging according to the gear of the whole machine, and further judging whether the whole machine is in the braking condition or not by combining the braking signal of a brake pedal detected by a displacement sensor when the whole machine is in the non-driving gear;
secondly, monitoring the SOC of the whole storage battery, wherein the controller body monitors the SOC value of the whole storage battery in real time;
and step three, selecting a braking mode, wherein under the condition that the whole machine is judged to be in a braking working condition in the step one, the braking mode is selected according to the SOC value of the whole machine storage battery monitored in the step two and signals of a pressure sensor and a displacement sensor, and the braking mode comprises a motor braking mode, a hydraulic braking mode and an emergency braking mode.
The judgment condition of the motor braking mode is that the whole machine is in a non-driving gear, the displacement sensor has no displacement signal, and when the SOC value of the storage battery of the whole machine is smaller than 1, the drive axle drives the drive motor to generate power and charges the storage battery of the whole machine.
The hydraulic braking mode includes a pedal braking mode and an electronically controlled braking mode,
in the pedal braking mode, when a driver steps on a brake pedal, the linkage stop valve cuts off an oil supply path where the electromagnetic proportional brake valve is located, and meanwhile, the hydraulic control stop valve conducts the hydraulic brake valve to connect the oil supply path between the energy accumulator and the brake calipers;
the electric control brake mode is a brake working condition, the displacement sensor has no displacement signal, and when the SOC value of the whole storage battery is equal to 1, the controller body controls the electromagnetic proportional brake valve to supply oil to the brake calipers.
The judging condition of the emergency braking mode is that the controller body judges whether the current braking mode is the emergency braking mode according to the change speed of the displacement measured by the displacement sensor, when the change speed of the displacement is greater than a set value, the current braking mode is judged to be the emergency formulation mode, and otherwise, the current braking mode is the hydraulic braking mode;
in the emergency braking mode, a driver steps on a brake pedal, and the energy accumulator supplies oil to the brake calipers through a hydraulic brake valve; and meanwhile, the braking pressure value measured by the pressure sensor controls the driving motor to decelerate, and when the braking pressure value reaches a set value, the storage battery of the whole machine stops supplying power to the driving motor.
Has the advantages that: according to the invention, the transmission efficiency is improved by directly connecting the driving motor with the driving bridge, and the driving motor is a motor generator and can realize braking and braking energy recovery of the whole machine under the braking working condition, so that the energy consumption of the whole machine is reduced; under the condition of meeting the existing operation habits, an automatic braking scheme is added, and the intelligent degree of the braking system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a hydraulic schematic of the present invention;
fig. 3 is an electrical schematic of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1, the brake system of the direct-drive electric engineering vehicle comprises a drive axle 1, a drive motor 2 and a hydraulic brake system 3, wherein the hydraulic brake system 3 comprises a brake caliper 31, a brake pedal 32, a hydraulic brake valve 33 and an accumulator 34, the brake caliper 31 is installed on the drive axle 1, the accumulator 34 is connected with the brake caliper 31 through the hydraulic brake valve 33, and the brake pedal 32 controls the on-off of the hydraulic brake valve 33; the method is characterized in that: the driving motor 2 is connected with the input end of the drive axle 1, and the driving motor 2 is a motor generator.
According to the invention, the transmission efficiency is improved by directly connecting the driving motor 2 with the drive axle 1, and the driving motor 2 is a motor generator which can realize braking of the whole machine and recovery of braking energy under the braking working condition, so that the energy consumption of the whole machine is reduced.
As shown in fig. 3, in order to further realize braking and recovery of braking energy of the whole machine, the driving motor 2 is connected to the controller assembly 4, the controller assembly 4 includes a controller body 41 and a motor controller 42, the controller body 41 controls a working mode of the driving motor 2 by controlling the motor controller 42, and when the driving motor 2 is in a braking mode, the driving motor 2 charges a storage battery of the whole machine.
As shown in fig. 2, in order to increase the intelligence of the brake system, the hydraulic brake system 3 includes an electromagnetic proportional brake valve 35 connected in parallel with the hydraulic brake valve 33, a pilot-controlled stop valve 36 is provided between the hydraulic brake valve 33 and the brake caliper 31, and an interlocking stop valve 37 is provided between the electromagnetic proportional brake valve 35 and the brake caliper 31; the controller body 41 controls the on-off and the opening of the electromagnetic proportional brake valve 35; the brake pedal 32 controls the hydraulic brake valve 33 and the linkage stop valve 37 at the same time, when the brake pedal 32 is not stepped on, the hydraulic brake valve 33 is in an initial state, an oil path where the hydraulic control stop valve 36 is located is disconnected, and meanwhile, the linkage stop valve 37 is conducted; when the brake pedal 32 is depressed, the interlocking cut-off valve 37 cuts off the oil supply path in which the electromagnetic proportional brake valve 35 is located, and the pilot cut-off valve 36 opens the hydraulic brake valve 33 to connect the oil supply path between the accumulator 34 and the brake caliper 31.
When a driver takes a braking measure actively, the brake pedal 32 is stepped on, the energy accumulator 34 supplies oil to the brake caliper 31 through the hydraulic brake valve 33 and the hydraulic control stop valve 36, active braking is realized, and an electric control brake oil path is cut off; when a driver does not take braking measures actively under the braking working condition, the controller body 41 controls the electromagnetic proportional brake valve 35 to be conducted, and the energy accumulator 34 supplies oil to the brake caliper 31 to realize automatic braking; under the condition of meeting the existing operation habits, an automatic braking scheme is added, and the intelligent degree of the braking system is improved.
In order to ensure that the accumulator 34 maintains a stable pressure, the hydraulic brake system 3 includes a charging valve assembly 38, and the accumulator 34 is connected to the overall hydraulic system through the charging valve assembly 38. The accumulator 34 can obtain stable pressure by introducing oil liquid of a hydraulic system of the whole machine, and a hydraulic system special for braking is not required to be additionally arranged, so that the cost is saved.
In order to improve the safety of the whole machine, oil is preferentially supplied to the brake system, and stable pressure of the oil accumulator 34 is ensured, the charging valve assembly 38 comprises a priority valve 381, a pressure regulating valve 382 and a one-way valve 383, a main control oil path of the priority valve 381 is connected with the whole machine hydraulic system, a control oil path on one side of the priority valve 381 is connected with the whole machine hydraulic system, and a control oil path on the other side of the priority valve 381 is connected with the whole machine hydraulic system through the pressure regulating valve 382; the energy accumulator 34 is connected with the whole hydraulic system through a one-way valve 383; the control oil path of the pressure regulating valve 382 is connected to the accumulator 34, the set pressure value of the pressure regulating valve 382 is equal to the set value of the accumulator 34, when the pressure value of the control oil path of the pressure regulating valve 382 is less than the set pressure value, the pressure regulating valve 382 communicates with the control oil paths on both sides of the priority valve 381, the priority valve 381 cuts off the oil path of the overall hydraulic system, when the pressure value of the control oil path of the pressure regulating valve 382 is greater than or equal to the set pressure value, the control oil path on one side of the priority valve 381 connected to the pressure regulating valve 382 is connected to the oil tank, and the priority valve 381 communicates with the oil path of the overall hydraulic system.
In order to avoid the sudden change of the pressure value to impact the energy accumulator 34 and the hydraulic system of the whole machine, the priority valve 381 is a three-position two-way valve, two sides of the priority valve are respectively a stop position and a communication position, and a throttle valve is arranged in the middle position. A throttling position is arranged between the cut-off position and the communicating position, so that the impact can be effectively reduced, the service life of a hydraulic element is prolonged, and the operation comfort of the whole machine is improved.
In order to realize the judgment of the braking condition, a pressure sensor 5 is arranged at a pressure oil inlet of the brake caliper 31, a displacement sensor 6 for detecting the displacement of the brake pedal 32 is arranged below the brake pedal 32, and the pressure sensor 5 and the displacement sensor 6 are respectively connected with the controller body 41.
A control method of a brake system of a direct-drive electric engineering vehicle comprises the following steps:
step one, judging the braking condition, namely preliminarily judging according to the gear of the whole machine, and when the whole machine is in a non-driving gear, further judging whether the whole machine is in the braking condition or not by combining the braking signal of a brake pedal 32 detected by a displacement sensor 6;
secondly, monitoring the SOC of the whole storage battery, wherein the controller body 41 monitors the SOC value of the whole storage battery in real time;
and step three, selecting a braking mode, wherein under the condition that the whole machine is judged to be in a braking working condition in the step one, the braking mode is selected according to the SOC value of the whole machine storage battery monitored in the step two and signals of the pressure sensor 5 and the displacement sensor 6, and the braking mode comprises a motor braking mode, a hydraulic braking mode and an emergency braking mode.
The judgment condition of the motor braking mode is that the whole machine is in a non-driving gear, the displacement sensor 6 has no displacement signal, and meanwhile, when the SOC value of the storage battery of the whole machine is smaller than 1, the drive axle 1 drives the drive motor 2 to generate power and charge the storage battery of the whole machine.
The hydraulic braking mode includes a pedal braking mode and an electronically controlled braking mode,
in the pedal braking mode, when a driver steps on the brake pedal 32, the linkage stop valve 37 cuts off an oil supply path where the electromagnetic proportional brake valve 35 is located, and meanwhile, the hydraulic control stop valve 36 conducts the hydraulic brake valve 33 and is communicated with the oil supply path between the energy accumulator 34 and the brake caliper 31;
the electric control brake mode is a brake working condition, the displacement sensor 6 has no displacement signal, and when the SOC value of the whole storage battery is equal to 1, the controller body 41 controls the electromagnetic proportional brake valve 35 to supply oil to the brake calipers 31.
The emergency braking mode is determined by the controller body 41 according to the change speed of the displacement measured by the displacement sensor 6, whether the current braking mode is the emergency braking mode is determined, when the change speed of the displacement is greater than a set value, the current braking mode is determined as the emergency formulation mode, otherwise, the current braking mode is the hydraulic braking mode;
in the emergency braking mode, a driver steps on a brake pedal 32, and an energy accumulator 34 supplies oil to the brake caliper 31 through a hydraulic brake valve 33; meanwhile, the braking pressure value measured by the pressure sensor 5 controls the driving motor 2 to decelerate, and when the braking pressure value reaches a set value, the storage battery of the whole machine stops supplying power to the driving motor 2.
In the emergency braking mode, a driver steps on a brake pedal, and the energy accumulator supplies oil to the brake calipers through a hydraulic brake valve; and meanwhile, the braking pressure value measured by the pressure sensor controls the driving motor to decelerate, and when the braking pressure value reaches a set value, the storage battery of the whole machine stops supplying power to the driving motor.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A brake system of a direct-drive electric engineering vehicle comprises a drive axle (1), a drive motor (2) and a hydraulic brake system (3), wherein the hydraulic brake system (3) comprises brake calipers (31), a brake pedal (32), a hydraulic brake valve (33) and an energy accumulator (34), the brake calipers (31) are installed on the drive axle (1), the energy accumulator (34) is connected with the brake calipers (31) through the hydraulic brake valve (33), and the brake pedal (32) controls the on-off of the hydraulic brake valve (33); the method is characterized in that: the driving motor (2) is connected with the input end of the drive axle (1), and the driving motor (2) is a motor generator.
2. The brake system of the direct drive electric working vehicle according to claim 1, characterized in that: the driving motor (2) is connected with a controller assembly (4), the controller assembly (4) comprises a controller body (41) and a motor controller (42), the controller body (41) controls the working mode of the driving motor (2) through controlling the motor controller (42), and when the driving motor (2) is in a braking mode, the driving motor (2) charges a storage battery of the whole machine.
3. The brake system of the direct drive electric working vehicle according to claim 2, characterized in that: the hydraulic brake system (3) comprises an electromagnetic proportional brake valve (35) connected with the hydraulic brake valve (33) in parallel, a hydraulic control stop valve (36) is arranged between the hydraulic brake valve (33) and the brake caliper (31), and a linkage stop valve (37) is arranged between the electromagnetic proportional brake valve (35) and the brake caliper (31); the controller body (41) controls the on-off and the opening of the electromagnetic proportional brake valve (35); the brake pedal (32) controls the hydraulic brake valve (33) and the linkage stop valve (37) at the same time, when the brake pedal (32) is not stepped on, the hydraulic brake valve (33) is in an initial state, an oil way where the hydraulic control stop valve (36) is located is disconnected, and the linkage stop valve (37) is connected; when the brake pedal (32) is stepped on, the linkage stop valve (37) cuts off the oil supply path where the electromagnetic proportional brake valve (35) is located, and simultaneously, the hydraulic control stop valve (36) conducts the hydraulic brake valve (33) to connect the oil supply path between the energy accumulator (34) and the brake caliper (31).
4. Braking system of a direct drive electric working vehicle according to claim 1 or 2 or 3, characterized in that: the hydraulic brake system (3) comprises a charging valve assembly (38), and the energy accumulator (34) is connected with the whole hydraulic system through the charging valve assembly (38).
5. The brake system of the direct drive electric working vehicle according to claim 4, characterized in that: the charging valve assembly (38) comprises a priority valve (381), a pressure regulating valve (382) and a one-way valve (383), a main control oil circuit of the priority valve (381) is connected with a complete machine hydraulic system, a control oil circuit on one side of the priority valve (381) is connected with the complete machine hydraulic system, and a control oil circuit on the other side of the priority valve (381) is connected with the complete machine hydraulic system through the pressure regulating valve (382); the energy accumulator (34) is connected with a complete machine hydraulic system through a one-way valve (383); the control oil path of the pressure regulating valve (382) is connected with the accumulator (34), the set pressure value of the pressure regulating valve (382) is equal to the set value of the accumulator (34), when the pressure value of the control oil path of the pressure regulating valve (382) is smaller than the set pressure value, the pressure regulating valve (382) is communicated with the control oil paths on two sides of the priority valve (381), the priority valve (381) cuts off the oil path of the whole hydraulic system, when the pressure value of the control oil path of the pressure regulating valve (382) is larger than or equal to the set pressure value, the control oil path on one side, connected with the pressure regulating valve (382), of the priority valve (381) is connected with the oil tank, and the priority valve (381) is communicated with the oil path of the whole hydraulic system.
6. The brake system of the direct drive electric construction vehicle according to claim 2 or 3, wherein: the brake caliper is characterized in that a pressure oil inlet of the brake caliper (31) is provided with a pressure sensor (5), a displacement sensor (6) for detecting displacement of the brake pedal (32) is arranged below the brake pedal (32), and the pressure sensor (5) and the displacement sensor (6) are respectively connected with the controller body (41).
7. The control method of the brake system of the direct drive electric working vehicle according to claim 6, characterized by comprising the steps of:
step one, judging the braking condition, namely preliminarily judging according to the gear of the whole machine, and when the whole machine is in a non-driving gear, further judging whether the whole machine is in the braking condition or not by combining a braking signal of a brake pedal (32) detected by a displacement sensor (6);
secondly, monitoring the SOC of the whole storage battery, wherein the controller body (41) monitors the SOC value of the whole storage battery in real time;
and step three, selecting a braking mode, wherein under the condition that the whole machine is judged to be in a braking working condition in the step one, the braking mode is selected according to the SOC value of the whole machine storage battery monitored in the step two and signals of a pressure sensor (5) and a displacement sensor (6), and the braking mode comprises a motor braking mode, a hydraulic braking mode and an emergency braking mode.
8. The control method of the brake system of the direct drive electric working vehicle according to claim 7, characterized in that: the judgment condition of the motor braking mode is that the whole machine is in a non-driving gear, the displacement sensor (6) has no displacement signal, and meanwhile, when the SOC value of the storage battery of the whole machine is smaller than 1, the drive axle (1) drives the drive motor (2) to generate electricity and charge the storage battery of the whole machine.
9. The control method of the brake system of the direct drive electric working vehicle according to claim 7, characterized in that: the hydraulic braking mode includes a pedal braking mode and an electronically controlled braking mode,
in the pedal braking mode, when a driver steps on a brake pedal (32), an oil supply circuit where the electromagnetic proportional brake valve (35) is located is cut off by the linkage stop valve (37), and meanwhile, the oil supply circuit between the energy accumulator (34) and the brake caliper (31) is communicated by the hydraulic brake valve (33) through the hydraulic control stop valve (36);
the electric control brake mode is a brake working condition, the displacement sensor (6) has no displacement signal, and when the SOC value of the whole storage battery is equal to 1, the controller body (41) controls the electromagnetic proportional brake valve (35) to supply oil to the brake calipers (31).
10. The control method of the brake system of the direct drive electric working vehicle according to claim 7, characterized in that: the judging condition of the emergency braking mode is that the controller body (41) judges whether the current braking mode is the emergency braking mode according to the change speed of the displacement measured by the displacement sensor (6), when the change speed of the displacement is larger than a set value, the current braking mode is judged to be the emergency setting mode, otherwise, the current braking mode is the hydraulic braking mode;
in the emergency braking mode, a driver steps on a brake pedal (32), and an energy accumulator (34) supplies oil to a brake caliper (31) through a hydraulic brake valve (33); meanwhile, the braking pressure value measured by the pressure sensor (5) controls the driving motor (2) to decelerate, and when the braking pressure value reaches a set value, the storage battery of the whole machine stops supplying power to the driving motor (2).
CN202210462098.7A 2022-04-28 2022-04-28 Braking system of direct-drive electric engineering vehicle and control method thereof Pending CN114604087A (en)

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CN202210462098.7A CN114604087A (en) 2022-04-28 2022-04-28 Braking system of direct-drive electric engineering vehicle and control method thereof

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CN202210462098.7A CN114604087A (en) 2022-04-28 2022-04-28 Braking system of direct-drive electric engineering vehicle and control method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117584757A (en) * 2023-12-18 2024-02-23 三一重型装备有限公司 Vehicle braking control method and device, whole vehicle controller and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117584757A (en) * 2023-12-18 2024-02-23 三一重型装备有限公司 Vehicle braking control method and device, whole vehicle controller and storage medium
CN117584757B (en) * 2023-12-18 2024-06-04 三一重型装备有限公司 Vehicle braking control method and device, whole vehicle controller and storage medium

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