KR100774410B1 - Steering wheel center and eccentric of car alignment apparatus of car - Google Patents

Abstract

A device for measuring alignment of a steering wheel and tilting of a vehicle is provided to instead of relying on an experience of a test driver, driving the wheels of a stationary vehicle as in a real driving situation to measure the alignment of the steering wheel and display the results by various sensors installed on the steering wheel alignment and tilting measuring device. A device for measuring alignment of a steering wheel and tilting of a vehicle includes a steering wheel angel sensor(30) installed on a lower end of a steering wheel for detecting steering speed, steering direction, and angle of the handle, and a yaw rate sensor(31) for electrically detecting the yaw moment by a freight fork vibrating when wheels of a vehicle is(20) vertically rotated with respect to a vertical axis as a reference. A lateral acceleration sensor(32) detects the acceleration of the vehicle being pushed towards the lateral direction, and has a single silicon element between two recharging plates. The later acceleration sensor discerns the lateral acceleration by the recharge capacity of the two recharge plates by moving between the two recharging plates depending on the lateral acceleration. A roll/brake tester(10) has drum shaped rolls where front and rear wheels can be mounted. The roll/brake tester tests the dragging when the vehicle is set at neutral at high speed, tests the braking capability by braking the vehicle at high speed, and the parking brake capability when the vehicle is stopped. A communication and a control unit(40) communicates and controls a control unit installed in the vehicle. A computing and storing unit(50) computes the signals from the communication and control unit using a software program and stores the information, and a display unit(60) displays the state of the vehicle and a maintenance work done by a worker.

Description

Steering wheel center and eccentric of car alignment apparatus of car

1 is a schematic diagram showing an inspection process of a typical vehicle.

Figure 2 is a schematic diagram showing an apparatus for measuring steering wheel alignment according to the present invention.

※ Explanation of symbols about main part of drawing ※

10: Roll / Brake Tester

20: vehicle

30: steering wheel angle sensor

31: yaw rate sensor

32: lateral acceleration sensor

33: vehicle speed sensor

40: communication and control

50: operation and storage

60: display unit

The present invention relates to a steering wheel alignment and a vehicle tilt measuring apparatus of a vehicle, and more particularly, to a steering wheel alignment measuring apparatus of a vehicle capable of accurately measuring the alignment state of the steering wheel under the same conditions as the actual driving state of the vehicle. It is about.

In general, a vehicle is provided with a steering wheel as a steering device for adjusting the driving direction of the vehicle.

The steering wheel of the vehicle is a steering operation mechanism that the driver manipulates to change the direction of the vehicle. In order to enable the correct steering operation of the driver, the steering wheel should be well-centered.

That is, the neutral state indicated by the rotation state of the steering wheel and the steering neutral state of the vehicle implemented by the steering devices from the actual steering shaft to the wheel must match.

Conventionally, as shown in Fig. 1, in the finished vehicle line, the left / right pull amount of the vehicle is measured by using a side slip device after the wheel alignment process in order to measure the vehicle's soliness.

However, when measuring by using the side slip device, the alignment of the steering wheel could not be measured because the wheels are not aligned correctly because the vehicle moves straight into the driver's sense when measuring the amount of slip (slip).

In addition, when the measurement using the side slip device has a low entry speed condition, there was a problem that can not determine the amount of pull during high-speed driving during actual driving.

On the other hand, the amount of tilting of the vehicle is measured through the driving test.

At this time, the vehicle determines the amount of pulling within a certain distance (eg 1m / 100m) when driving at a constant speed (eg 4 speed 80km / h).

Since the driving test is judged by the driver's sense, there is a problem that the amount of deflection is determined according to the skill of the driver.

As described above, the judgment by the driver has a problem in that the amount of misalignment and misalignment of the steering wheel cannot be accurately expressed.

The present invention has been invented to solve the above problems, the object of which is to rotate the wheels installed in the vehicle to the actual driving state while the vehicle is stopped and to adjust the alignment state of the steering wheel using signals detected by various sensors To provide a vehicle steering wheel alignment and vehicle tilt measurement device that can be measured.

Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

Steering wheel alignment and vehicle tilt measurement device of the vehicle of the present invention is mounted on the lower portion of the steering wheel steering wheel angle sensor for detecting the steering speed, steering direction and steering angle of the steering wheel, and the plate fork when the vehicle rotates about the vertical axis A yaw rate sensor that electronically detects the yaw moment of the vehicle while causing a vibration change, and the acceleration of the force that the vehicle is trying to push out laterally, with one silicon element between the two charging plates and transversely Transverse acceleration sensor that moves between charging plates according to the acceleration and determines the acceleration by the charging capacity between the gaps, and drum-shaped rolls on which the front and rear wheels of the vehicle are seated, drives the vehicle at high speed and is dragged in a neutral state Roll / Brake that measures the brake force by stepping on the brake when the brake is stopped or the parking brake force at the stop A tester, a communication and control unit for communicating with and controlling a control unit installed in the vehicle, an arithmetic and storage unit for converting, calculating and storing signals obtained from the communication and the control unit by a software program, the state of the vehicle and Including a display unit for displaying the work of the operator.

Referring to the present invention having such characteristics in detail as follows.

Figure 2 is a schematic diagram showing an apparatus for measuring steering wheel alignment according to the present invention.

As referred to herein, the present invention is provided with a steering wheel angle sensor (SWA sensor) 30 mounted at the lower end of the steering wheel and detecting steering speed, steering direction and steering angle of the steering wheel.

In addition, when the vehicle rotates about the vertical axis, that is, when the vehicle rotates about the Z axis direction, a yaw rate sensor 31 is provided to electronically detect the yaw moment of the vehicle while causing the vibration of the plate fork to change. . The yawment is the force to move toward the outer wheel inside the sensor when the front and rear of the vehicle body is left, right or swiveling.

On the other hand, a lateral acceleration sensor is provided to detect the lateral acceleration of the vehicle while driving, the lateral acceleration sensor detects the acceleration of the force that the vehicle is to be pushed laterally, between the two charging plates One silicon element is provided to move between the charging plates according to the lateral acceleration to determine the acceleration based on the charging capacity between the gaps.

The roll / brake tester 10 that measures the brake force, drag force, parking brake force, and the like of the production vehicle in the inspection process in the automobile production plant is provided with a drum 11 for rotating the front and rear wheels of the vehicle.

On the other hand, the roll / brake tester 10 drives the vehicle at high speed, and the movement of the vehicle in the forward and backward directions is regulated using the retaining roll, and the brake force is applied by pressing the brake at a neutral state and stopping at a neutral state. To measure the parking brake force at standstill.

In addition, the communication and control unit 40 communicates with a control unit (ESP UNIT) installed in the vehicle and controls the control unit.

The operation and storage unit 50 converts, calculates, and stores a signal obtained from the communication and control unit 40 by a software program.

On the other hand, the display unit 60 instructs the driver to work or displays the state of the vehicle (measured value and normal or bad).

Referring to the present invention configured as described in detail as follows.

First, the vehicle 20 is moved to the roll / brake tester 10 installed in the inspection line, and then the wheels installed in the vehicle are rotated using the drum 11 to drive in the state where the vehicle 20 is stopped. The virtual speed is 120Km / h or more. At this time, the vehicle 20 may be moved by the steering wheel by a predetermined amount.

Based on these conditions, the diagnostic connector is connected to the terminal on the vehicle side, and the steering wheel angle sensor (SWA sensor) 30, the yaw rate sensor (YAW RATE sensor) 31, the lateral acceleration sensor 32, and the vehicle speed sensor ( Read the measured value of 33) and calculate the angle of twist of the steering wheel when going straight to determine the normal or bad condition.

On the other hand, command the vehicle to go straight through communication with the vehicle, the driver operates the steering wheel to move the vehicle straight in the center of the roll / brake tester 10 (without lateral movement), when releasing the hand and the mileage at this time and the It is to determine the amount of pulling by calculating the lateral movement distance by the value of the vehicle speed sensor and the like.

① Connect Roll / Brake Tester and Diagnostic Connector → ② Real-time transmission of sensor measurement value and measurement of steering wheel angle sensor value when going straight to vehicle → ③ Directing and directing test of vehicle → ④ Performing straight and tilting test by driver → ⑤ Vehicle sensor Output value monitoring → ⑥ Vehicle tilt and steering wheel twist angle (normal or bad) output

The operation principle of each step is described in detail as follows.

1. Position the vehicle on the drum 11 of the roll / brake tester 10 and connect the diagnostic connector for communication with the vehicle 20.

2. Check the communication with the vehicle 20, and drive the vehicle when communication is possible, and instructs the connector to be refitted on the monitor in case of communication failure.

3. When the vehicle driving instruction is displayed on the monitor, the driver drives the vehicle and the measuring equipment monitors the vehicle information in real time.

4. (YAW RATE SENSOR OUT PUT ≒ 0)-① AND (LATERAL G SENSOR OUT PUT ≒ 0) -② Output value of (SWA SENSOR OUT PUT) -③ under condition and calculation of average value.

▶ It is judged that there is no transverse movement force in the vehicle under the conditions ① and ②. (∵When the lateral force is generated, a value acceleration occurs at F = ma. ② Moment due to the condition and the lateral force. ① The condition cannot be satisfied.) If there is no lateral force, the vehicle will go straight.

5. Instruct the vehicle to go straight and pull test on the monitor.

6. The driver releases the steering wheel when driving the vehicle at high speed, such as during a drive test.

7. (YAW RATE SENSOR OUT PUT ≠ 0) -④ OR (LATERAL G SENSOR OUT PUT ≠ 0) -⑤ Output value storage and pull amount calculation under condition.

VEHICLE SPEED SENSOR monitors the vehicle's mileage during monitoring.

▶ Determination of transverse movement force in the vehicle under the conditions ④ and ⑤ above. When lateral force occurs, the vehicle moves laterally

8. Display and store in the device on the monitor whether OK / NG is incorrect or the amount of steering wheel misalignment and deflection measured and calculated in 4 and 7 above.

On the other hand, when explaining an embodiment of the calculation according to the present invention.

1. Monitor and average the value of SWA sensor under the condition that the value of YAW RATE, lateral acceleration sensor is close to 0 after vehicle driving command.

Condition: (YAW RATE sensor output ≒ 0) AND (Lateral acceleration sensor output ≒ 0)

Monitoring: SWA sensor output (every 100ms) = 0.25, 0.26, 0.27, 0.28, 0.29, 0.28, 0.27, 0.26, 0.25, 0.24

Steering wheel misalignment value = (0.25, 0.26, 0.27, 0.28, 0.29, 0.28, 0.27, 0.26, 0.25, 0.24) /10=0.265°→OK (0.265 ° <0.5 °)

2. Release the hand while driving straight and monitor and calculate the yaw rate when the value of YAW RATE and the lateral acceleration sensor exceed the standard value.

Condition: (YAW RATE sensor output ≠ 0) OR (Lateral acceleration sensor output ≠ 0)

Monitoring: Lateral acceleration sensor output (every 100ms) = 0.05, 0.06, 0.07,0.08, 0.10, 0.12, 0.14, 0.17, 0.14, 0.13 (G) (G ≒ 9.8m / s ^ 2)

Vehicle straight distance for 1 second (100Km / h ≒ 27.8m / s straight) = 27.8m

Vehicle lateral travel for 1 second

= v (0) t + 0.5at ^ 2 = (0 + 0.5 * 0.05 * 9.8 * 0.1 ^ 2) + (0.05 * 0.1 * 0.1 + 0.5 * 0.06 * 9.8 * 0.1 ^ 2) +... .. = 0.00245 + 0.00784 +... … = 0.42238 (m)

Vehicle tilt (100Km / h ≒ 27.8m / s go straight) = 0.422m / 27.8m = 1.518m / 100m → NG (1.518m ＞ 1m)

Therefore, according to the present invention, the driver adjusts the steering wheel so that the vehicle does not move from side to side to drive the vehicle 20 on the drum 11 while the vehicle is seated on the roll / brake tester 10.

At this time, the driver instructs the vehicle to go straight (no lateral movement), and determines that the vehicle does not move left and right by the yaw rate sensor and the lateral acceleration sensor.

If the SWA sensor values are monitored and averaged, this is the amount of steering wheel misalignment (angle).

On the other hand, if the driver moves the vehicle from side to side by making a condition such as driving test by removing the steering wheel from the steering wheel, the value of the G sensor is monitored by calculating the amount of movement and the driving distance by the value of the vehicle speed sensor. can do.

Based on this principle, real-time sensor values are analyzed to measure the amount of play and the amount of tilt of the vehicle in case of misalignment of the steering wheel.

As described above, the present invention is capable of accurately quantifying the misalignment of the steering wheel and the amount of vehicle tilting by the equipment rather than the operator's sense, and determines the alignment state of the steering wheel in the inline without performing an actual driving test (normal or poor). There is a distinctive effect that can be done.

In addition, the present invention can reproduce the high-speed driving situation that is the same condition as the actual driving in the inline, and because it is stored by storing the values determined by digitizing the data has a unique effect of preventing a variety of pull-related phenomenon.

In addition, the present invention can be quickly corrected by the vehicle alignment and steering wheel misalignment before driving inspection, and because the roll / brake tester is used, there is a unique effect of minimizing the work time and additional maneuver.

Claims (1)

The steering wheel angle sensor 30 mounted at the lower part of the steering wheel to detect steering speed, steering direction and steering angle of the steering wheel, and the plate fork electronically change the vibration when the vehicle rotates about the vertical axis. And a yaw rate sensor 31 for detecting the acceleration of the force that the vehicle is trying to push out laterally, and one silicon element is provided between the two charging plates and moves between the charging plates according to the lateral acceleration. And a lateral acceleration sensor 32 for determining the acceleration based on the charging capacity between the gaps, and a drum-shaped roll on which the front and rear wheels of the vehicle 20 are seated, and drive the vehicle 20 at high speed while being in a neutral state. The roll / brake tester 10 which measures the braking force by pressing the brake at the time of pulling and stopping, and the control unit installed in the vehicle 20 A communication and control unit 40 for controlling the control unit, a calculation and storage unit 50 for converting, calculating and storing signals obtained from the communication and control unit 40 by a software program, the state of the vehicle and Steering wheel alignment and vehicle tilt measurement device of a vehicle, characterized in that it comprises a display unit 60 for displaying the work content of the operator.

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