Roller-type multi-road-condition simulated testing stand of electric power assisted steering system

Abstract

The invention discloses a roller-type multi-road-condition simulated testing stand of an electric power assisted steering system. The testing stand comprise a testing stand frame, compression mechanisms, rollers, a roller driving mechanism and an electric power assisted steering device, the two rollers are erected at the two sides of the testing stand frame respectively and installed on a bearingpedestal, the roller driving mechanism is arranged between the rollers, each roller is provided with a wheel, the bottom of the wheel makes contact with the surface of the corresponding roller, the two compression mechanisms are arranged at the two sides of the upper portion of the testing stand frame respectively, and the electric power assisted steering device is mounted on the testing stand frame, and connected with the two wheels. The rollers and the roller driving mechanism are arranged additionally on the basis of a present electric power assisted steering testing stand, and during test,the roller driving mechanism drives the rollers to roll, the rollers drive the wheels to rotate via friction between the rollers and the wheels, the wheels realizes roller of the wheels while rotating, real vehicle road test is realized in the reverse direction, and simulated test approaches the real test more and is more reliable.

Description

technical field [0001] The invention relates to a road condition simulation device, in particular to a drum type multi-road condition simulation electric power steering system test bench. Background technique [0002] Regardless of whether the car is moving or stationary, the driver feels the steering through the steering wheel, so some things must be measured as accurately as possible to ensure the driving state. These things are mainly data measured by real car experiments, but considering different road conditions , different real vehicle conditions and various environmental conditions, it is very difficult to conduct all tests under the same conditions. Therefore, the actual vehicle test lacks repeatability. During the actual vehicle test, the driver's concentration will be reduced due to safety issues. More importantly, the actual vehicle test requires at least a 7-meter-wide and 1Km-long test site , which will require a lot of human and financial resources. Therefore...

AI Technical Summary

Problems solved by technology

[0003] In most steering simulation test benches, in order to simulate the driving state and automatically adjust the torque, the steering system is connected with springs and dampers. The steering system usually includes steering wheels, steering columns, rack and pinion, and tie rods. Although this type of The simulator is the most widely used, but it is limited to the wheel rotation, and there is still a big difference from the real vehicle road test. In order to improve the simulation degree of the steering system test bench, the test situation of the electric power steering test bench and the actual The car road test situation is more similar, that is, the wheel is still rolling while turning, and a new steering system simulator needs to be developed to meet this academic requirement

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