Resistance simulation device for wire-control steering test bed of automobile

Abstract

The invention discloses a resistance simulation device for a wire-control steering test bed of an automobile. A piston rod of a load cylinder (1) is connected with a gear rack (3) of a steering executing mechanism of the automobile to act a lateral force on a rack mechanism (3) to simulate the ground lateral resistance stressed during the steering of the vehicle. An oil inlet and an oil outlet of the load cylinder (1) are connected with working oil ports A and B of an electromagnetic directional valve (5) respectively; the oil inlet P of the electromagnetic directional valve (5) is connected with the oil outlet of a main pump (10); the oil outlet of the main pump (10) is connected in parallel with an electromagnetic proportional overflow valve (12); the oil inlet of an overflow valve (7) is connected in parallel with an auxiliary pump (8); the oil inlets of the main pump (10) and the auxiliary pump (8) are connected with a filter (9); and a resistance simulation controller (6) is connected with the electromagnetic directional valve (5) and the electromagnetic proportional overflow valve (12) to output a current signal to the electromagnetic proportional overflow valve (12) so as to control the overflow pressure of the electromagnetic proportional overflow valve (12).

Description

technical field [0001] The invention relates to an automobile electronic control frame test device, in particular to an automobile wire-controlled steering test bench resistance simulation device. Background technique [0002] The steering system of traditional vehicles is mechanically connected between the steering wheel and the wheels, and has a fixed transmission ratio, so many technical ideas are limited. The Steer-By-Wire (SBW) system cancels the mechanical connection device and coordinates the motion relationship between the steering wheel and the wheels through software. It can set the transmission ratio of the steering system arbitrarily and adjust the parameters that change with the vehicle speed. Compensate so that the steering characteristics of the car do not change with the speed of the car, and can also be combined with other active safety equipment to improve the overall handling stability of the car. Secondly, the steer-by-wire system can use the centering t...

AI Technical Summary

Problems solved by technology

This simulation method is relatively simple, but since the simulated lateral force is proportional to the compressed length of the spring, it cannot simulate the accurate value of the lateral resistance, and once the spring is selected, it is fixed Spring stiffness, regardless of the working conditions or conditions, the lateral resistance is invariable, so it cannot reflect the resistance in the actual test process, and the obtained test data will have a large gap with the real data

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