JPS58147629A - Method for testing multiple shaft power distributing machine - Google Patents

Abstract

PURPOSE:To facilitate the distribution and setting of torque among the shafts, by providing a speed control means at one side of each output shaft, and providing a torque control means at the other side. CONSTITUTION:DC motors 8R and 8L are coupled to the axles of front wheels 4L and 4R of a vehicle under test as power absorbing bodies. DC motors 9R and 9L are coupled to rear wheels 5L and 5R. The speeds of the motors 8R and 8L are detected by speed detectors 10R and 10L. The torque of the motors 9R and 9L are detected by torque meters 11R and 11L. The torque of the input shafts of the vehicle under test is controlled at the constant value, the speeds of the front wheels 4R and 4L are controlled at the constant value by a setting device 12, and the torque of the rear wheels 5R and 5L are controlled at the constant value by a setting device 16. Then, the torque distribution among the front and rear wheels can be arbitrarily set based on the preset value of the setting device 16 and the torque of the input shafts.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for testing a power transmission system of a multi-shaft power distribution machine such as a multi-shaft drive vehicle.

DC dynamometers and eddy current dynamometers are used to perform performance tests, durability tests, etc. for vehicle power system tests, and the above-mentioned methods are also used for power transmission system tests that include everything from the engine to differential gears and brakes. Various tests are conducted using a dynamometer. By the way, the above-mentioned dynamometer can also be used to test the power transmission system of multi-axle drive vehicles such as four-wheel drive vehicles, but since the front and rear wheels are connected to the engine, #i In a test where the speed ratio between the rear wheels is set to different values, it becomes difficult to obtain a torque distribution that matches actual driving.

An object of the present invention is to provide a test method that facilitates the setting of torque distribution between front wheels and rear wheels.

Figure 1 shows the overall structure of the test method of the present invention.

Front wheel side differential gear 2 from multi-shaft motor engine l
And left and right 4R via rear wheel side differential gear 3
, 4L and the left and right rear wheels 5 Rz 5 In the power transmission system test of a four-wheel drive vehicle, the front wheels 4R, 4L and the rear wheels 5 were used.
R and 5L each have a dynamometer 6 as a power absorber.
” #6 Lj 7 R, 7L are negative IIl.

At this O test facility, 4 wheels 4L, 4R, SL traveling straight
, M1m+Summer! -x) 1mm +) i Fengshi Nitani, Kagome 184" m4H average rotation speed (M v * - f
-Ntxh) and the average rotational speed of rear wheels 5'Xa and 5H (N*
*10 Mar, ) is equal. However, during cornering, the front and rear wheels have different rolling paths, and also have different effective radii due to tire wear and changes in air pressure.The average rotational speed between the rear wheels becomes different, resulting in drive transmission. Unreasonable force is applied to the system. As a test method for the power transmission system including during turning, in the present invention, the front and rear wheels and each dynamometer are directly connected by a wheel shaft or a wheel wheel, and the speed of one of the front and rear wheels is controlled. By controlling the torque of the other wheel, the torque distribution between the front and rear wheels can be freely set, making it possible to perform tests that simulate the load condition IIA of the power transmission system, including when turning.

g2riA represents a control circuit for the dynamometer according to the present invention. li [Electric motor gR, 8L ore is connected to the front wheels 4L and 4R of the test vehicle as excitation force absorption, respectively, and the rear wheels 51g,
Each of the 5RKs will be combined. The electric motor 8R#8XJ has a speed detector 101. Early summer detection is done by IOL and 1 electric motor 9
B, 9L torque meter IIR.

Torque detection is performed by 11L. Front wheel @ electric motor 8R, lXa Hiro speed control is performed. That is, speed setting 1
The speed setting value set by 112 is compared with the respective detection values of speed detection 1!10R#1OL.
t is made, and the deviation is the speed control amplifier 13R13L.
A speed control signal is taken out through the current control layer @414M, 14L and the thyristor converter 15R215.
Armpit l as the electric motor Rg1 of the motor drive circuit consisting of 'L
It is input to a minor loop that matches the detected current of the 1llll path.

Torque control is performed on the rear wheel electric motors 9R and 9L. That is, the torque setting value of the torque setting device 16 is the torque detection value 5ll.
The detected values of R and IIL are compared, and a torque control signal is taken out through the torque control amplifiers 17R and 17L, and this signal or the current control layer 1! It is used as a current signal for the drive circuit of l1l18R#18L and the thyristor converters 19R, 19L, and a minor loop is configured in the drive circuit.

Such a 111g control system was prepared, and constant control of the input shaft torque of the drive transmission system was performed by constant control of the engine throttle opening of the test vehicle, constant speed control was performed by the left and right front wheels 4 Ra4Ll setting device, and left and right rear wheels 51. 5: When lJ is controlled to a constant torque by the setting device 16, it becomes possible to conduct a test in which the torque distribution between the front wheel and the rear wheel is arbitrarily set from the set value of the torque setting @16 and the input shaft torque.

Therefore, it is possible to conduct a test that matches the torque distribution between the front and rear wheels due to the difference in the tire rolling contact path O in the circling of the vehicle, and to match the torque distribution during actual driving. It is also possible to include differences in effective diameter due to changes.

In addition, among the single-stroke drive systems, the power transmission system test KFi scissor engine, which does not have an engine, is replaced by the Rinryu Denshunki, which is used as a power source. Also, for torque control a60) torque detection @ 11 Rr 11 L, a load cell can be used, and if a DC generator is used for the power absorber, a self-expanding electric calculation method or a shaft torque meter can be used.

As described above, according to the present invention, it is possible to easily set the torque distribution of each axis in a multi-axis power transmission system of a power distribution machine such as a vehicle, and it is easy to perform durability tests under complicated vehicle operating conditions. It has the effect of

[Brief explanation of the drawing]

Fig. 1 illustrating the overall configuration of the method of the present invention Fig. 1 Fig. 2 t
FIG. 2 is a configuration diagram of main parts of the control system in FIG. 1... Engine, 2, 3... Differential gear, 4R, 4L... Both wheels, 5R, 5L... Rear wheel, 6R
, 6L, 7R, 7L... Dynamometer, 10R#1
0L...Speed detector, IIR, IIL...Torque detector, Minoru...Speed setter, 16...Torque setter.

Claims (1)

[Claims] a speed control means for controlling the speed of a part of the ζ0III force absorber, and a torque control means for controlling the remaining torque of the power absorber; A test method for a multi-axis power distribution machine characterized by setting the torque distribution of each power absorption body from the torque.