RU2823398C1 - Method of monitoring technical state of wheeled vehicles with hybrid, electric power plant on benches with support rollers under operating conditions and device for its implementation - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to technical diagnostics of wheeled vehicles. Disclosed is a method for monitoring the technical state of a wheeled vehicle with a hybrid, electric power plant on a bench with support rollers 6, 9 under operating conditions, according to which the vehicle is installed with wheels on support rollers 6, 9 of a test bench, a test mode of diagnostics is set by means of acceleration with the help of a power plant of the wheels of the vehicle and inertial masses 2 of the test bench. During the test, by means of transducers 19, the current flowing through high-voltage wires and consumed by the power plant is recorded, by means of transducer 20 the rotation frequency of the crankshaft of the internal combustion engine is recorded, besides, transducers 1, 14 measure angular velocities and lengthwise responses at vehicle drive wheels to analyse obtained results and to estimate technical condition of wheeled vehicle power plant. Also disclosed is a device for implementing the described method.

EFFECT: solution allows you to expand the diagnostic functionality, increase the information content and efficiency of monitoring the technical condition of wheeled vehicles with a hybrid or electric power plant.

2 cl, 6 dwg

Description

The method relates to mechanical engineering, in particular to the technical diagnostics of wheeled vehicles with a hybrid, electric power plant. The method and the equipment that implements it are intended for diagnostics and monitoring of wheeled vehicles with a hybrid or electric power plant, assessment of their technical condition through measurement and analysis of the energy consumption parameters of the electric power plant, parameters of the internal combustion engine, as well as through measurement and analysis of angular velocity and realized longitudinal reactions on wheels.

There are methods for monitoring the technical condition of wheeled vehicles and bench equipment for implementing these methods.

There is a known method and the equipment that implements it, in which the technical condition of wheeled vehicles is monitored, implemented by the American company MTS using Flat-Trac Dynamometer Roadway equipment

(https://www.mts.corn/eri/products/automotive/fall-vehicle-test-system/flat-trac-dynamometer). Common features are setting test modes and measuring longitudinal reactions on vehicle wheels. The disadvantages of the equipment under consideration are its great structural complexity and massiveness, large dimensions and very high cost, which makes it impossible to widely use it in operating conditions.

There is a known method and the equipment that implements it LPS 2020 4WD [Description of the type of measuring instruments for the State Register No. 34784-07 - Roller power stands of the CARTEC trademark of the LPS series models: 2020, 2020 4WD, 2510, 2510 4WD], intended for monitoring traction and dynamic qualities wheeled vehicles. Common features with the claimed device are the presence of a loading device in the form of an electrodynamic brake, the presence of support rollers, and a pneumatic system that pushes out the wheels of the controlled vehicle.

The disadvantage of this device is the inability to measure power parameters on the wheels in acceleration, coasting and power recovery modes. In addition, the design of the stand, which implements the contact method of measuring force parameters using strain gauges, does not provide for the possibility of measuring traction forces individually on each wheel of a vehicle, which leads to the impossibility of monitoring the technical condition of vehicles with individual electric motor wheels.

There is a known method and the equipment that implements it (patent No. 2755626, IPC G01L 5/13, published on December 30, 2020), adopted as a prototype and intended for monitoring the technical condition of the dynamic vehicle stabilization system on stands with running drums. The common features of this device with the proposed device is the design of the device, namely: the presence of two blocks of support rollers with contactless longitudinal reaction meters for each wheel of the vehicle, speed sensors of support rollers, wheel speed sensors, flywheel inertial masses and an electrodynamic brake, acting as loading devices . The disadvantages of the prototype include the inability to measure the energy consumption parameters of the electric power plant of a wheeled vehicle, which limits the diagnostic functionality of the device, namely, it excludes the possibility of fully diagnosing and monitoring the technical condition of the power plants of hybrid and electric wheeled vehicles.

The presence of a new set of significant features that differ from the prototype in the claimed invention allows us to conclude that the claimed invention meets the “novelty” criterion.

An additional comparative analysis of patent and scientific and technical information did not reveal sources containing information about the well-known set of distinctive features of the claimed invention, which indicates its compliance with the “inventive step” criterion.

The technical result of the proposed method consists in setting a test mode for diagnosing hybrid and electric power plants of wheeled vehicles by measuring the longitudinal reactions on each wheel of the vehicle, measuring and analyzing the parameters of energy consumption of electric power plants and the crankshaft speed of the internal combustion engine.

The technical result is achieved by a method for monitoring the technical condition of a wheeled vehicle with a hybrid, electric power plant on a stand with support rollers under operating conditions, which consists in installing the vehicle on the support rollers of the test stand, setting a diagnostic test mode by accelerating using an inertial power plant masses of the stand and the wheels of the vehicle installed on the support rollers of the stand, according to the invention, in the process of monitoring the technical condition of a wheeled vehicle, the current flowing through high-voltage wires and consumed by the power plant is recorded, the crankshaft speed of the internal combustion engine is recorded, and angular velocities are measured and longitudinal reactions on the driving wheels of the vehicle, analyze the results obtained and evaluate the technical condition of the power plant of the wheeled vehicle.

The technical result of the proposed device is to expand the diagnostic functionality, which consists in the ability to monitor the technical condition and diagnose hybrid and electric power plants of wheeled vehicles by measuring the parameters of the energy consumption of the electric power plant and the crankshaft speed of the internal combustion engine.

The technical result is achieved by a device for monitoring the technical condition of a wheeled vehicle with a hybrid, electric power plant under operating conditions, which includes a stand containing two blocks with support rollers and four flywheels, kinematically connected to each other through shafts, couplings and chain drives, rollers of servo systems, with sensors designed for measuring the speed of rotation of the wheels, as well as sensors for measuring the longitudinal reactions on the wheels of the car, located on the drive shafts of the support rollers, according to the invention, contains a sensor recording the rotation speed of the crankshaft of an internal combustion engine and current measuring sensors for recording the current flowing through high-voltage wires, consumed power plant.

A diagram of the device and measurement systems for implementing a method for diagnosing wheeled vehicles with a hybrid, electric power plant is shown in Fig. 1 and fig. 2;

In fig. 3 shows the appearance of a wheeled vehicle with a hybrid power plant "Toyota Prius" on a full-support stand;

In fig. 4 shows the appearance of a wheeled vehicle with an electric power plant “KIA SOUL” on a full-support stand;

In fig. 5 shows an oscillogram of the process of functioning of a wheeled vehicle with a hybrid power plant on a full-support stand, including acceleration to a speed of 60 km/h and coasting with increased recovery;

In fig. 6 shows an oscillogram of the process of functioning of a wheeled vehicle with a hybrid power plant on a full-support stand, including acceleration to a speed of 60 km/h with increased recuperation (start moment),

Where:

1 - support roller speed sensor; 2 - flywheel; 3 - drive chain transmission; 4 - coupling; 5 - non-contact force sensor; 6 - front support roller; 7 - speed sensor of the tracking system roller; 8 - tracking system roller; 9 - rear support roller; 10 - chain drive; 11 - electrodynamic brake braking force sensor; 12 - eddy current blades of the electrodynamic brake; 13 - drive shaft of the support rollers; 14 - gearbox; 15 - electrodynamic brake;

16 - electrodynamic brake rotor speed sensor;

17 - front block of support rollers; 18 - rear block of support rollers; 19 - sensors for recording the energy consumption of the electric power plant; 20 - sensor for recording the crankshaft speed of an internal combustion engine.

The stand consists of two blocks 17 and 18, in which two sections with support rollers 6 and 9 are installed, between which the rollers of the servo system 8 are located. The support rollers 6 and 9 are connected by a chain transmission 10. Torque from a pair of rollers 6 and 9 is transmitted to the contactless sensor 5. Then to the connecting coupling 4, and through the chain drive 3 to the flywheel 2. The left pair of rollers in one block is connected to the right pair through cardan gears 13 and gearboxes 14, which form a kinematic connection between the front and rear blocks of the stand, when In this case, the power flow is transmitted through the electrodynamic brake 15.

The measurement system of the device for implementing a method for monitoring the technical condition of wheeled vehicles with a hybrid, electric power plant is presented in the form of support roller speed sensors 1, contactless force sensors 5, roller speed sensors of the tracking system 7, braking force sensor of the electrodynamic brake I, frequency sensor rotation of the electrodynamic brake rotor 16, sensors for recording the energy consumption of the electric power plant 19, a sensor for recording the crankshaft speed of the internal combustion engine 20. The signals from each sensor are processed by amplifiers and converters, with subsequent processing in the ADC-DAC and PC. The software complex processes signals, displays them and compares them with standard values.

The proposed method and its implemented equipment differ from the prototype in that it additionally contains a system for measuring the energy consumption parameters of an electric power plant and a system for measuring the crankshaft speed of the internal combustion engine of a wheeled vehicle, which allows expanding the diagnostic functionality, increasing the efficiency, information content and efficiency of monitoring the technical condition wheeled vehicles with a hybrid, electric power plant.

The proposed method for monitoring the technical condition of wheeled vehicles with a hybrid or electric power plant on a stand with support rollers is implemented using the described device and consists of the following: the wheeled vehicle being diagnosed is mounted with its wheels on the support rollers of the diagnostic stand; then the vehicle body is secured to the stand frame with tightening straps, preventing the body from moving relative to the stand frame; further, additional diagnostic equipment is installed on the wheeled vehicle, namely: a sensor based on the Hall effect at position 20 - to register the ignition spark in the first cylinder of the internal combustion engine and, as a result, register the crankshaft speed; current measuring sensors under position 19 - for recording the phases of current flowing through high-voltage power wires, which are located between the electric motor-generator, inverter and high-voltage traction battery. After this, the wheels of the vehicle accelerate the support rollers under positions 6 and 9, and, consequently, the flywheel masses under position 2 of the stand to a given angular velocity. During the acceleration process, longitudinal forces on the wheels of the vehicle are measured by non-contact sensors under position 5. The angular velocities of the support rollers under positions 6 and 9 are measured by sensors under position 1, wheel speeds are measured by sensors of the tracking system rollers under position 7. The speed of the simulated “road” is controlled sensor under position 16. The load force simulated by the brake is measured by the sensor under position 11.

The proposed method differs from the prototype in that in the process of monitoring the technical condition of wheeled vehicles with a hybrid or electric power plant, the parameters of the electric power plant, the internal combustion engine are measured, as well as through the measurement and analysis of the realized longitudinal reactions on the wheels of the vehicle with a hybrid or electric power unit, which allows the proposed method and its implemented equipment to be used for monitoring the technical condition and diagnostics of wheeled vehicles with a hybrid or electric power unit under vehicle operating conditions.

Oscillograms of the process of functioning of a wheeled vehicle with a hybrid power plant on the support rollers of a full-support stand up to a speed of 60 km/h with subsequent coasting in the increased recovery mode were obtained experimentally. The presented oscillograms display the dependences of the torque of the driving wheels, vehicle speed, angular velocity of the crankshaft, and the current flowing through the high-voltage wires of the hybrid power plant on time. The obtained dependencies make it possible to quantitatively assess the technical condition of the power plant units of wheeled vehicles (Fig. 5).

For a more visual representation, this graph shows an enlarged fragment of the start of movement of a wheeled vehicle with a hybrid power plant on a full-support stand. Using these graphs, it is possible to analyze the characteristics of the functioning of the GSU (Fig. 6).

Tests confirming the correctness of the method and the functionality of the device were carried out at the Research Laboratory for Monitoring the Technical Condition and Diagnostics of Vehicles at IrNITU.

Claims (2)

1. A method for monitoring the technical condition of a wheeled vehicle with a hybrid, electric power plant on a stand with support rollers under operating conditions, which consists in installing the vehicle on the support rollers of the test stand, setting the diagnostic test mode by accelerating the inertial masses using a power plant stand and vehicle wheels mounted on the support rollers of the stand, characterized in that in the process of monitoring the technical condition of a wheeled vehicle, the current flowing through high-voltage wires and consumed by the power plant is recorded, the crankshaft speed of the internal combustion engine is recorded, and angular velocities are measured and longitudinal reactions on the driving wheels of the vehicle, analyze the results obtained and evaluate the technical condition of the power plant of the wheeled vehicle. 2. A device for monitoring the technical condition of a wheeled vehicle with a hybrid, electric power plant in operating conditions, including a stand containing two blocks with support rollers and four flywheels, kinematically connected to each other through shafts, couplings and chain drives, rollers of servo systems, with sensors , intended for measuring the speed of rotation of the wheels, as well as sensors for measuring the longitudinal reactions on the wheels of the car, located on the drive shafts of the support rollers, characterized in that it contains a sensor that registers the crankshaft speed of the internal combustion engine, and current measuring sensors for recording the flow of high-voltage wires of the current consumed by the power plant.