KR100783904B1 - Slope road jostle prevention device for hybrid car and method thereof - Google Patents

Abstract

A device and a method for preventing a hybrid vehicle from rolling back on a slope are provided to hold the vehicle by creep torque by using a motor and to drive a CVT(Continuously Variable Transmission) electric motor pump and a connecting solenoid at the same time in starting an engine, if the residual capacity of a battery is small. A device for preventing a hybrid vehicle from rolling back on a slope is composed of: a unit(15) for sensing the speed and weight of the vehicle and the charge/discharge state of a battery on the slope; a control unit(14) CAN(Controller Area Network)-communicating with the sensing unit and controlling rollback of the vehicle on the slope by setting the use amount of torque according to the sensed information of the sensing unit; a first driving unit driven by a control operation of the control unit, to prevent the vehicle from rolling back on the slope firstly by using creep torque; and a second driving unit driven by a control operation of the control unit at the same time in starting an engine, to prevent the vehicle from rolling back on the slope secondly by using creep torque.

Description

Slope road jostle prevention device for hybrid car and method

1 is a block diagram of a creep-aid system of a conventional hybrid vehicle.

2 is an overall configuration diagram of a creep-aid system safety device of a hybrid vehicle according to an embodiment of the present invention.

Figure 3 is a state diagram before operation of the CVT electric pump motor and the pump solenoid in an embodiment of the present invention.

4 is an operational state diagram of the CVT electric pump motor and the pump solenoid according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

11; Tilt angle sensor 12; HCU

13; Electronic control unit 14; CVT control unit

15; Air pressure automatic sensing unit 16; Controller

17,18; Solenoid 19; Jungle Protection

20; Motor 21; CVT electric pump motor

22; CVT pump solenoids 31,32; 1,2 bearing wheel

33; Solenoid drive wheel 100; Hydraulic motor

100a; Drive shaft 200; Belt linkage

300; ABS modulator

The present invention relates to a technique for improving a problem of pushing on a slope of a hybrid vehicle, and more particularly, a vehicle generated when an operation failure of a creep aid system (hereinafter referred to as CAS) by a hybrid control unit (HCU) is performed. The present invention relates to a slope preventing device and a method of a hybrid vehicle, which can prevent the rolling phenomenon of the vehicle.

The hybrid vehicle in mass production now uses the engine torque to drive the brake oil pump and maintain the brake oil pressure.When the vehicle stops uphill, it enters an idle stop and the creep-aid system is driven by the hybrid control unit to brake. The operation is performed to block the pipe hydraulic pressure to the solenoid to catch the brake.

That is, the creep-aid system of the hybrid vehicle prevents the skid while maintaining the brake hydraulic pressure even when the engine is not operated while the operation is performed by the inclination angle sensor, and determines the inclination position based on the detection signal from the inclination angle sensor. To determine the idle stop entry condition.

Referring to this in more detail with reference to Figure 1, the creep-aid system 1 of the hybrid vehicle made by the hybrid control unit (HCU) determines the inclination position of the vehicle in accordance with the signal detected by the inclination angle sensor (2) The controller determines the idle stop entry condition and controls the controller 3 through CAN communication while turning off the vehicle according to the determined result.

At this time, the controller 3 stops the vehicle by blocking the pipe hydraulic pressure of the rolling prevention device 5 going to the brake system (ABS modulator) 4 with the solenoids 6 and 7 to keep the brake oil pressure constant. Accordingly, even if the engine does not operate, the brake hydraulic pressure is kept constant to prevent the vehicle from rolling on the slope.

However, if the brake hydraulic pressure is not maintained due to the breakdown of the creep-aid system 1, there is no problem on a general road, but a vehicle may be pushed a lot on a slope with a large inclination, and in particular, the solenoid valves 6 and 7 may freeze in winter. If the solenoid valve (6) (7) is fixed in the cold or hot summer, the vehicle push problem is bound to be large.

In particular, when there are many passengers other than the driver, or when the slope is high, the vehicle becomes more jungled, and when there is no motor driving logic when the anti-creep device fails in a hybrid vehicle, the CVT operation delay time (the current vehicle specification is hydraulic Due to the clutch being stuck only after a certain time after the engine is driven, the hybrid vehicle jungle on the slope becomes larger.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and when the failure of the creep-aid system fails to determine how much torque to use in advance by setting the vehicle speed sensor and the inclination and the vehicle weight in the hybrid vehicle, It uses the motor as an auxiliary power source to maintain the vehicle using creep torque, and when the battery is low, the CVT electric motor pump and connecting solenoid can be started at the same time as the engine is started to prevent the vehicle from rolling on the slope. An object of the present invention is to provide an anti-slope device and a method thereof for a hybrid vehicle.

Method for preventing the slope rolling of the present invention hybrid vehicle for achieving the above object,

A first step of checking the occupant weight and vehicle speed of the vehicle through the TPMS can communication and the CVT can communication in the HCU before calculating the idle stop, calculating a required torque according to the slope and the weight of the occupant, and diagnosing the anti-fall solenoid failure;

A second step of operating the CAS when the anti-rolling solenoid is in the diagnosis result and the idle stop is entered in the failure state;

A third step of compensating for the creep state and instructing an output to the motor by comparing the creep torque calculated in advance when the vehicle creep occurs after the CAS operation;

A fourth step of starting the engine when the motor command or the battery failure or the battery SOC amount of the output command is low, and driving the CVT electric pump motor and the CVT pump solenoid at the same time to prevent vehicle rolling; And,

Stopping driving of the CVT electric pump motor and the pump solenoid after a predetermined time has elapsed while the vehicle is prevented from driving, and controlling driving of the hydraulic pump; Characterized in proceeding to.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is an overall configuration diagram of a creep-aid system safety device of a hybrid vehicle according to an embodiment of the present invention, Figure 3 is a state diagram before operation of the CVT electric pump motor and the pump solenoid in an embodiment of the present invention, Figure 4 An embodiment of the present invention shows a state diagram of the operation of the CVT electric pump motor and the pump solenoid.

The rolling prevention method of the hybrid vehicle according to the embodiment of the present invention is implemented by the rolling prevention system of FIGS. 2 to 4, wherein the rolling prevention system is a CAS 12 operating from a sensing operation of the inclination angle sensor 11. ), An electronic control unit (ECU) 13 can-communicating with the CAS 12, a CVT control unit 14 can-communicating with the CAS 12, and electronically controlling the air pressure of the tire when the vehicle enters a ramp. The tire air pressure automatic sensing unit (TPMS) 15 which transmits to the unit 13 and the CAS 12 by can communication, and the control of the controller 16 prevent the vehicle from being pushed when the solenoid 17 and 18 are driven. The driving prevention part 19, the motor 20 controlled by the CAS 12, the CVT electric pump motor 21 controlled by the CVT control part 14, and the CVT pump solenoid 22 And the hydraulic CVT 23 interlocked from the drive of the CVT electric pump motor 21. It will include.

Here, the CVT electric pump motor 21 is configured on the drive shaft 100a of the hydraulic pump 100 is provided with the first bearing wheel 31,

The first bearing wheel 31 of the drive shaft 100a is coupled to the second bearing wheel 32 of the belt connecting shaft 200 connected to the engine, but the second bearing wheel 32 has a solenoid driving wheel ( 33) integrally,

The solenoid drive wheel 33 is configured to move when driving the CVT pump solenoid 22 to separate the first and second bearing wheels 31 and 32.

Referring to Figures 2 to 4 attached to the action of the embodiment of the present invention configured as described above are as follows.

First, the CAS 12 checks the occupant weight and vehicle speed of the vehicle in the electronic control unit 13 and the CVT control unit 14 through the TPMS can communication and the CVT can communication before entering the idle stop while the vehicle is located on the slope. Meanwhile, after calculating the required torque according to the inclination and the weight of the occupant, it is diagnosed whether the anti-rolling solenoid is broken.

At this time, if the failure of the anti-rolling solenoid (17, 18) does not occur, the CAS (12) determines the inclination position of the vehicle in accordance with the signal detected by the inclination angle sensor (11) and idle stop The controller 16 controls the controller 16 through CAN communication while determining the entry condition and turning off the vehicle according to the determined result.

Then, the controller 16 stops the vehicle by blocking the pipe hydraulic pressure of the rolling prevention unit 19 going to the brake system (ABS modulator) 300 with the solenoids 17 and 18 to keep the brake oil pressure constant. Accordingly, even when the engine does not operate, the brake hydraulic pressure is kept constant to prevent vehicle slippage on the slope.

On the other hand, in the state where the vehicle is prevented by the operation of the solenoid (17, 18), when the vehicle is caused by the failure of the solenoid (17) 18, the CAS 12 is calculated in advance By comparing the creep torque and the vehicle speed, a driving signal is output to the motor 20 to correct the vehicle slip.

At this time, when the driving of the motor 20 is not made from the driving signal, that is, the failure of the motor 20, the battery failure, or the amount of battery SOC is low, the CAS 12 starts the engine. At the same time, a drive signal is output to the CVT control unit 14 via can communication.

Then, the CVT control unit 14 is to perform a control operation for operating the CVT electric pump motor 21 and the CVT pump solenoid 22, thereby preventing the vehicle from rolling.

That is, the CVT electric pump motor 21 is configured in the drive shaft 100a of the hydraulic pump 100 in which the first bearing wheel 31 is provided, and the engine in the first bearing wheel 31 of the drive shaft 100a. It is coupled to the second bearing wheel 32 of the belt connecting shaft 200 which is connected to the solenoid drive wheel 33 is integrally formed on the second bearing wheel 32, the solenoid drive wheel 33 The CVT pump solenoid 22 is composed of,

When driving the CVT electric pump motor 21, the CVT pump solenoid 22 moves the solenoid drive wheel 33 formed on the second bearing wheel 32 connected to the belt connecting shaft 200 in the direction of the arrow of FIG. P) to separate the second bearing wheel 32 from the drive shaft 100a of the hydraulic pump 100.

Then, the power according to the driving of the CVT electric pump motor 21 is not introduced into the engine, accordingly driving the hydraulic pump 100 by the driving force of the CVT electric pump motor 21, the CAS 12 is in operation Even if the solenoids 17 and 18 fail in the state, the hydraulic pump 100 can be driven at the same time as starting the engine in advance to prevent the vehicle from rolling on the slope.

On the other hand, after the state in which the vehicle is prevented by the hydraulic pump 100 is made for a predetermined time as described above, the CAS 12 outputs an off signal to the CVT control unit 14,

The CVT control unit 14 stops the driving of the CVT electric pump motor 21 and the CVT pump solenoid 22, thereby controlling the driving of the hydraulic pump 100 made by the CVT electric pump motor 21. will be.

As described above, the present invention examines the vehicle speed sensor, the inclination, and the vehicle weight in a hybrid vehicle when the creep-aid system fails to determine how much torque to use in advance, and sets creep torque using a motor as an auxiliary power source. In order to maintain the vehicle, and if the battery is low, the CVT electric motor pump and the connecting solenoid are driven at the same time as the engine is started in advance, thereby effectively preventing the vehicle from rolling on the slope.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (7)

Means for detecting a vehicle speed, vehicle weight, and battery charge / discharge state of the vehicle on a slope; Control means for communicating with the sensing means and setting a torque usage according to the sensing information of the sensing means to control a vehicle rolling state on a slope; A first drive unit which drives from the control operation of the control means and primarily prevents vehicle rolling on the slope using creep torque; And, A second drive unit which simultaneously drives the engine from the control operation of the control unit and prevents the vehicle from being pushed on the slope; Slope rolling prevention device of a hybrid vehicle, characterized in that comprising a. The method of claim 1, wherein the sensing means, Vehicle speed sensor to detect the running speed of the vehicle, weight detection unit to detect the weight of the vehicle, inclination angle sensor to detect the inclination angle of the vehicle, tire air pressure automatic detection unit to detect the air pressure of the tire when entering the vehicle ramp, battery charge and discharge status Slope prevention device of a hybrid vehicle, characterized in that it comprises a power check unit for checking. The method of claim 1, wherein the control means, Hybrid control unit (HCU) operating from the detection operation of the inclination angle sensor, electronic control unit for can communication with the HCU, and a CVT control unit for the can communication with the HCU, comprising: . The method of claim 1, wherein the first drive unit, And a motor driven and controlled by a hybrid control unit included in the control means in accordance with the calculated torque when calculating the use torque from the vehicle speed sensor and the driving inclination of the vehicle and the weight of the vehicle. Anti-rolling device for hybrid vehicles. The method of claim 1, wherein the second drive unit, A solenoid, a skid prevention portion that prevents the vehicle from driving when the solenoid is driven, a CVT electric pump motor controlled by a CVT control unit, a CVT pump solenoid, and a hydraulic CVT interlocked from driving the CVT electric pump motor Slope rolling prevention device of a hybrid vehicle, characterized in that. The method of claim 5, The CVT electric pump motor is configured on the drive shaft of the hydraulic pump is provided with a first bearing wheel, the first bearing wheel of the drive shaft is configured to be combined with the second bearing wheel of the belt connecting shaft connected to the engine, the second bearing wheel The solenoid drive wheel is integrally configured, wherein the solenoid drive wheel is configured to move when driving the CVT pump solenoid to separate the first and second bearing wheels, characterized in that the hybrid vehicle tilt prevention device. A first step of checking the occupant weight and vehicle speed of the vehicle through the TPMS can communication and the CVT can communication in the HCU before calculating the idle stop, calculating a required torque according to the slope and the weight of the occupant, and diagnosing the anti-fall solenoid failure; A second step of operating the HCU when the anti-rolling solenoid is broken and the idle stop is entered in the broken state as a result of the diagnosis; A third step of compensating for the creep state and instructing an output to the motor by comparing the creep torque calculated in advance when the vehicle creep occurs after the operation of the HCU; A fourth step of starting the engine when the motor failure or the battery failure or the battery SOC amount received the output command is low, and simultaneously driving the CVT electric pump motor and the CVT pump solenoid to prevent vehicle rolling; And, Stopping driving of the CVT electric pump motor and the pump solenoid after a predetermined time has elapsed while the vehicle is prevented from driving, and controlling driving of the hydraulic pump; Method for preventing the slope rolling of the hybrid vehicle, characterized in that proceeding to.

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