A method for detecting the overall output efficiency and performance of eps-sam sub-assembly
A technology of output efficiency and detection method, which is applied in the testing of mechanical components, vehicle steering/bump performance, testing of machine/structural components, etc., and can solve the problem of inability to accurately measure the size of various indicators, unassessed SAM subassembly input/ Output, it is impossible to obtain the output torque symmetry of the SAM subassembly, the maximum performance of the output efficiency, etc.
Active Publication Date: 2022-02-15
HUBEI HENGLONG AUTOMOTIVE SYST GRP
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Problems solved by technology
Since this method does not examine the actual sensor input torque signal and the actual input / output of the SAM subassembly, nor does it superimpose the transmission efficiency of the mechanical part, it is impossible to obtain the overall output torque symmetry, output efficiency, and maximum output of the SAM subassembly. Performance and other index values, so it is not possible to accurately measure the size of each index of the electronic power assist part of the electronic hydraulic power steering
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[0044] The overall output efficiency of the EPS-SAM sub-assembly, the performance detection method include the following steps; first set the required rotating speed 1000rpm, vehicle speed 0km / h, input shaft rotation speed 100° / s, 200° on the detection device. ° / s, 400° / s, 600° / s, 800° / s, the output shaft load torque value is 4.46Nm; the detection device is composed of machine table, PC, workpiece fixture, slide cylinder and servo motor, slide cylinder It consists of a left slider cylinder and a right slider cylinder. The sliding table cylinder is symmetrically installed on the working panel of the machine table through the slide rail. The servo motor (Beckhoff AX5206) is installed on the sliding table cylinder. The workpiece fixture is fixed on the working panel between the sliding table cylinders. There are PC (PC control program: MFC) and CAN card (control program: Beckhoff TwinCAT2), PC and CAN card are connected; torque sensor (HBMT5) is installed on the servo motor. The...
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The invention relates to a method for detecting the overall output efficiency and performance of an EPS-SAM sub-assembly, belonging to the technical field of testing of automotive electronic hydraulic power steering gears. The invention directly measures and collects the input shaft position, input / output torque value and current value of the electronic hydraulic power steering gear-SAM sub-assembly under different vehicle speeds and steering speeds through the detection device, and accurately calculates the system efficiency of the sub-assembly through the collected data. , output performance, calculate the curve symmetry and torque difference through the real-time drawing of the input torque-current assist curve, input torque-output torque curve; draw the efficiency-input shaft speed curve according to the output efficiency calculated from the collected data to obtain the score The output efficiency of the assembly is measured, so as to realize the detection of steering assist symmetry and system efficiency. It provides a scientific basis for accurately measuring the size of each index of the electronic assist part of the electronic hydraulic power steering gear.
Description
technical field [0001] The invention relates to a method for detecting the overall output efficiency and performance of an EPS-SAM sub-assembly, belonging to the technical field of automotive electronic hydraulic power steering gear testing. Background technique [0002] As one of the two major safety systems of the automobile chassis, the steering system is a key functional component to realize the high-performance maneuverability and stability of the automobile. Its own mechanical properties and control quality directly affect the steering stability level of the automobile, and greatly affect the driving safety. With the progress and development of society and the continuous improvement of people's living standards, automobiles have become an indispensable part of most people's lives, and people's requirements for the comfort of automobiles are also constantly improving. The advanced automobile steering system needs to solve the contradiction between low-speed steering lig...
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IPC IPC(8): G01M17/06G01M13/025
CPCG01M17/06G01M13/025
Inventor 钟爱龙刘艳
Owner HUBEI HENGLONG AUTOMOTIVE SYST GRP