A tractor traction load moving test system and method

Abstract

The invention discloses a tractor traction load moving test system and method, and relates to the field of tractor testing. A hydraulic control mechanism can be used to realize measurement with high precision and good stability. The test system includes a transfer case, a hydraulic motor, a hydraulic control mechanism and a hydraulic control mechanism. The hydraulic power source, the hydraulic motor is connected to the hydraulic control mechanism, the hydraulic control mechanism is connected to the hydraulic power source, the hydraulic control mechanism can control the rotation of the hydraulic motor, the output end of the hydraulic motor is connected to the transfer case, and the transfer case is used to connect the traveling system of the load vehicle. , the transfer case can also be used to connect the gearbox of the load vehicle.

Description

technical field [0001] The invention relates to the field of tractor testing, in particular to a tractor traction load moving testing system and method. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The tractor traction test basically uses two types of load vehicles: the first method is to use large-scale construction machinery or tractors directly as load vehicles, and use the weight of the load vehicle itself to manually or automatically match the accelerator and press the brake pedal. The second method is to use a dynamometer (usually an eddy current or AC dynamometer) installed on the chassis of the load vehicle for loading. [0004] On the whole, the inventor believes that both of the above two schemes have the disadvantage of being unable to achieve full-scale accurate measurement: in the first scheme, the accelerator and brake of the orig...

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Problems solved by technology

[0004] On the whole, the inventor believes that both of the above two schemes have the disadvantage of being unable to achieve full-scale accurate measurement: in the first scheme, the accelerator and brake of the original car are not designed for testing loads, so the use of this scheme The disadvantages are: ① low measurement accuracy; ② poor stability, greatly affected by human factors of the driver, and cannot achieve accurate measurement; in the second solution, the dynamometer is only used as a loading means, without the boost function or using the original car The power system boosts, so the disadvantages of using this solution are: ①If there is no boost function, the load vehicle can only be measured after the test tractor pulls the load vehicle to start, and the lower limit of the measurement is the pure rolling friction of the load vehicle, which cannot Realize the test of the small load section; ②Using the booster of the original vehicle power system, the traction load vehicle will be in the working condition of both loading (braking) and boosting (equivalent to both gas pedal and brake), the dynamometer needs What is overcome is not only the traction force of the test tractor, but also the power of the load vehicle itself. It is difficult to guarantee the stability, or it takes a long time to enter the steady state, and it causes waste of power. The selection of the dynamometer must also Choose a more powerful dynamometer

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