CN115931382A - Vehicle power assembly test bench - Google Patents

Abstract

The invention relates to the technical field of vehicle testing, in particular to a vehicle power assembly test bed which comprises a platform, wherein the platform is provided with four dynamometer machines corresponding to four wheels of a vehicle; the motor of the dynamometer comprises a motor and a rotating speed and first torque sensor arranged on the motor; the vehicle comprises a driving half shaft, a power assembly and a cab, wherein a second torque sensor is arranged on the driving half shaft, and a voltage and current sensor is arranged on a direct current bus of the power assembly; a gear shifting handle, an accelerator pedal and a brake pedal are arranged in the cab; when the vehicle power assembly test table is used for testing, a vehicle is mounted on the platform, and four wheels are respectively connected with a motor of the dynamometer and then tested until all test working conditions are completed; according to the invention, the target output torque of the motor is achieved by controlling the opening of the brake pedal and the accelerator pedal, the target motor output torque is obtained by installing the torque sensor at the output end of the motor, control software of an automobile does not need to be obtained, and the debugging time is reduced.

Description

Vehicle power assembly test bench

Technical Field

The invention relates to the technical field of vehicle testing, in particular to a vehicle power assembly test bed.

Background

Under the environment that the country vigorously promotes energy conservation and emission reduction, how to promote vehicle energy availability factor becomes the key problem, wherein the test of power assembly efficiency provides key technical support for power assembly efficiency promotion. At present, the main testing means of the efficiency of the power assembly is to use a testing bench of two motors to carry the power assembly for testing, but the main testing means has the following problems:

1. the power assembly is required to be independently installed on a test bed, and the installation state of the power assembly is different from the carrying state of the whole vehicle; 2. measuring the working condition of low oil temperature under the normal temperature environment, wherein the temperature of the lubricating oil at a part of high-power measuring points is difficult to keep constant; 3. in the aspect of torque control of the power assembly, controller software information needs to be acquired to interact with a test bed, a plurality of signals need to be simulated, and the debugging time is long.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the vehicle power assembly test bed has the advantages of reducing errors, keeping the oil temperature constant and shortening the debugging time.

In order to solve the technical problems, the invention adopts the technical scheme that:

a vehicle power assembly test bed comprises an environment cabin and a platform arranged in the environment cabin, wherein the platform is provided with four dynamometer machines corresponding to four wheels of a vehicle;

the motor of the dynamometer comprises a motor and a rotating speed and first torque sensor arranged on the motor;

the vehicle comprises a driving half shaft, a power assembly and a cab, wherein a second torque sensor is arranged on the driving half shaft, and a voltage and current sensor is arranged on a direct current bus of the power assembly; a gear shifting handle, an accelerator pedal and a brake pedal are arranged in the cab;

when the vehicle power assembly test table is used for testing, a vehicle is mounted on the platform, and four wheels are respectively connected with a motor of the dynamometer and then tested until all test working conditions are completed;

the test process comprises the following steps:

collecting access data of each sensor; the platform is switched to a rotating speed control mode, and the rotating speed of the motor is adjusted to a target value; controlling and adjusting the opening of an accelerator pedal to enable the value of a torque sensor at the output end of a motor to reach a target torque; continuously measuring, and recording direct current voltage, direct current, and the rotating speed and torque of the driving half shaft;

and calculating the direct current power and the output power of each working condition, wherein the efficiency of the power assembly is the ratio of the output power to the direct current power.

Preferably, the vehicle further comprises a cooling system, a cooling water temperature control unit and a speed reducer, wherein a temperature sensor is arranged on an oil discharge port of the speed reducer; the cooling system is communicated with the speed reducer;

the test process further comprises: and controlling the temperature of the environmental chamber to reach a target value, and controlling a cooling water temperature control unit to adjust the oil temperature of the speed reducer to reach the target value.

Preferably, the vehicle powertrain test stand further comprises an acquisition system;

the test procedure further comprises:

the acquisition system acquires access data of each sensor.

Preferably, the acquisition system configures the sensors according to sensor parameters.

Preferably, the cab has a driving robot therein;

the test procedure further comprises:

and the driving robot controls and adjusts the opening of the accelerator pedal to enable the value of the torque sensor at the output end of the motor to reach the target torque.

The invention has the beneficial effects that: the target output torque of the motor is achieved by controlling the opening of the brake pedal and the accelerator pedal, the target output torque of the motor is obtained by installing a torque sensor at the output end of the motor, control software of an automobile does not need to be obtained, and debugging time is reduced; through the completion test to four-wheel, can the at utmost simulate the real behavior of vehicle, improved experimental accuracy greatly.

Drawings

Fig. 1 is a structural diagram of a vehicle powertrain test stand according to an embodiment of the present invention.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, a vehicle powertrain test stand includes an environmental chamber and a platform disposed in the environmental chamber, wherein the platform is provided with four dynamometers corresponding to four wheels of a vehicle;

the motor of the dynamometer comprises a motor and a rotating speed and first torque sensor arranged on the motor;

the vehicle comprises a driving half shaft, a power assembly and a cab, wherein a second torque sensor is arranged on the driving half shaft, and a voltage and current sensor is arranged on a direct current bus of the power assembly; a gear shifting handle, an accelerator pedal and a brake pedal are arranged in the cab;

when the vehicle power assembly test table is used for testing, a vehicle is mounted on the platform, and four wheels are respectively connected with a motor of the dynamometer and then tested until all test working conditions are completed;

the test process comprises the following steps:

collecting access data of each sensor; the platform is switched to a rotating speed control mode, and the rotating speed of the motor is adjusted to a target value; controlling and adjusting the opening of an accelerator pedal to enable the value of a torque sensor at the output end of the motor to reach a target torque; continuously measuring, and recording direct current voltage, direct current, and the rotating speed and torque of the driving half shaft;

and calculating the direct current power and the output power of each working condition, wherein the efficiency of the power assembly is the ratio of the output power to the direct current power.

According to the above description, the target output torque of the motor is achieved by controlling the opening of the brake pedal and the accelerator pedal, the target output torque of the motor is obtained by installing the torque sensor at the output end of the motor, control software of an automobile does not need to be obtained, and the debugging time is reduced; through the completion test to the four-wheel, can the at utmost simulation vehicle's true behavior, improve experimental accuracy greatly.

Furthermore, the vehicle also comprises a cooling system, a cooling water temperature control unit and a speed reducer, wherein a temperature sensor is arranged on an oil discharge port of the speed reducer; the cooling system is communicated with the speed reducer;

the test process further comprises: and controlling the temperature of the environmental chamber to reach a target value, and controlling a cooling water temperature control unit to adjust the oil temperature of the speed reducer to reach the target value.

From the above description, it can be known that the control environment temperature conforms to the actual low oil temperature running environment of the automobile, so that the oil temperature is easier to keep constant, and also conforms to the running environment of the whole automobile, so that the oil temperature is easier to keep constant, and the running environment of the whole automobile is also better met.

Further, the vehicle powertrain test stand further comprises an acquisition system;

the test process further comprises:

the acquisition system acquires access data of each sensor.

Furthermore, the acquisition system configures the sensor according to the sensor parameters.

As can be seen from the above description, the sensors are configured by the acquisition system according to the sensor parameters,

further, a driving robot is arranged in the driving cab;

the test process further comprises:

and the driving robot controls and adjusts the opening of the accelerator pedal to enable the value of the torque sensor at the output end of the motor to reach the target torque.

From the above description, through adopting the driving robot, the system that can need not to use the vehicle controls the vehicle, walks around the system of vehicle, and then need not debugging and adaptation, only needs the debugging to drive the robot in proper order and can satisfy the requirement, promotes efficiency of software testing.

The installation process comprises the following steps:

step one; a rotating speed and a first torque sensor are arranged at the output end of a motor of the dynamometer;

step two: mounting a second torque sensor at the drive axle shaft;

step three: a temperature sensor is arranged at the oil discharge port of the speed reducer;

step four: installing a voltage and current sensor at a direct current bus of the power assembly;

step five: a driving robot is installed and connected with a gear shifting handle, an accelerator pedal and a brake pedal;

step six: mounting the detected vehicle to a four-motor rack, wherein four wheels are respectively connected with four motors;

step seven: accessing each sensor into a data acquisition system, and configuring the sensors according to sensor parameters;

step eight: controlling the temperature of the environmental chamber to reach a target value, and controlling a cooling water temperature control unit to adjust the oil temperature of the speed reducer to reach the target value;

step nine: the four-motor rack is switched to a rotating speed control mode, and the rotating speed of the motor is adjusted to a target value to operate at a fixed rotating speed;

step ten: controlling the driving robot to adjust the opening degree of an accelerator pedal so that the value of a torque sensor at the output end of the motor reaches a target torque;

step eleven: continuously measuring a certain time, and recording direct current voltage, direct current, the rotating speed and the torque of the two half shafts;

step twelve: and repeating the seven to eleven steps to finish all the test working conditions.

Step thirteen: and calculating the direct current power and the output power of each working condition, wherein the efficiency of the power assembly is the ratio of the output power to the direct current power.

Example one

Referring to fig. 1, a vehicle powertrain test stand comprises an environmental chamber and a platform arranged in the environmental chamber, wherein the platform is provided with four dynamometers corresponding to four wheels of a vehicle;

the motor of the dynamometer comprises a motor and a rotating speed and first torque sensor arranged on the motor;

the vehicle is a front-drive electric vehicle and comprises a driving half shaft, a power assembly and a cab, wherein a second torque sensor is arranged on the driving half shaft, and a voltage and current sensor is arranged on a direct-current bus of the power assembly; a gear shifting handle, an accelerator pedal and a brake pedal are arranged in the cab; the driving half shaft is a front left half shaft and a front right half shaft;

when the vehicle power assembly test bench is used for testing, a vehicle is mounted on the platform, and four wheels are respectively connected with a motor of the dynamometer and then tested until all test working conditions are completed;

the test process comprises the following steps:

collecting access data of each sensor; the platform is switched to a rotating speed control mode, and the rotating speed of the motor is adjusted to a target value; controlling and adjusting the opening of an accelerator pedal to enable the value of a torque sensor at the output end of the motor to reach a target torque; continuously measuring, recording direct current voltage, direct current, and the rotating speed and torque of a driving half shaft;

and calculating the direct current power and the output power of each working condition, wherein the efficiency of the power assembly is the ratio of the output power to the direct current power.

The vehicle also comprises a cooling system, a cooling water temperature control unit and a speed reducer, wherein a temperature sensor is arranged on an oil discharge port of the speed reducer; the cooling system is communicated with the speed reducer;

the test process further comprises: and controlling the temperature of the environmental chamber to reach a target value (the control environmental temperature accords with the actual low-oil-temperature running environment of the automobile), and controlling the cooling water temperature control unit to adjust the oil temperature of the speed reducer to reach the target value.

The vehicle power assembly test bed further comprises an acquisition system;

the test procedure further comprises:

the acquisition system acquires access data of each sensor.

And the acquisition system configures the sensor according to the sensor parameters.

The driving chamber is internally provided with a driving robot;

the test procedure further comprises:

and the driving robot controls and adjusts the opening of the accelerator pedal to enable the value of the torque sensor at the output end of the motor to reach the target torque.

Example two

The vehicle is a rear-drive electric vehicle, and the driving half shaft is a rear left half shaft and a rear right half shaft.

EXAMPLE III

A vehicle power assembly test bed is characterized in that a vehicle is a four-wheel-drive electric vehicle, and driving half shafts are four half shafts in a front-rear, left-right and left-right mode.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (5)

1. A vehicle power assembly test bed is characterized by comprising an environment cabin and a platform arranged in the environment cabin, wherein the platform is provided with four dynamometer machines corresponding to four wheels of a vehicle;

the motor of the dynamometer comprises a motor and a rotating speed and first torque sensor arranged on the motor;

the vehicle comprises a driving half shaft, a power assembly and a cab, wherein a second torque sensor is arranged on the driving half shaft, and a voltage and current sensor is arranged on a direct current bus of the power assembly; a gear shifting handle, an accelerator pedal and a brake pedal are arranged in the cab;

when the vehicle power assembly test table is used for testing, a vehicle is mounted on the platform, and four wheels are respectively connected with a motor of the dynamometer and then tested until all test working conditions are completed;

the test process comprises the following steps:

collecting access data of each sensor; the platform is switched to a rotating speed control mode, and the rotating speed of the motor is adjusted to a target value; controlling and adjusting the opening of an accelerator pedal to enable the value of a torque sensor at the output end of the motor to reach a target torque; continuously measuring, recording direct current voltage, direct current, and the rotating speed and torque of a driving half shaft;

and calculating the direct current power and the output power of each working condition, wherein the efficiency of the power assembly is the ratio of the output power to the direct current power.

2. The vehicle powertrain test stand of claim 1, wherein the vehicle further comprises a cooling system, a cooling water temperature control unit and a retarder, and a temperature sensor is arranged on an oil discharge port of the retarder; the cooling system is communicated with the speed reducer;

the test process further comprises: and controlling the temperature of the environmental chamber to reach a target value, and controlling a cooling water temperature control unit to adjust the oil temperature of the speed reducer to reach the target value.

3. The vehicle powertrain test stand of claim 1, further comprising an acquisition system;

the test procedure further comprises:

the acquisition system acquires access data of each sensor.

4. The vehicle powertrain test stand of claim 3, wherein the acquisition system configures the sensor based on sensor parameters.

5. The vehicle powertrain test stand of claim 1, wherein the cab has a driving robot therein;

the test process further comprises:

and the driving robot controls and adjusts the opening of the accelerator pedal to enable the value of the torque sensor at the output end of the motor to reach the target torque.

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