发明名称 |
ELECTRO-HYDRAULIC POWER STEERING CONTROLLER CONDUCTING FLUID TEMPERATURE COMPENSATION OF MOTOR SPEED SWITCHING AND STANDBY SWITCHING POINT |
摘要 |
PROBLEM TO BE SOLVED: To attain an exact switching area of power steering fluid pressure computed from the current of a pump driving motor by correcting a switching point load value according to a power steering fluid temperature. SOLUTION: The output of a sum-block 122, which is obtained from motor current, and is the approximate value of power steering load compensated for power steering fluid temperature and a motor speed is provided in a nonlinear low-pass filter 124. The output of the low-pass filter is formed as one input to a function generator 126. The nonlinear low-pass filter 124 is formed to provide a different time constant from the changing value of power steering load. A fast time constant is provided to increase the motor current so as to conduct switching promptly from a standby condition, and is restricted so as not to generate noise at the time of switching like this. |
申请公布号 |
JPH11198837(A) |
申请公布日期 |
1999.07.27 |
申请号 |
JP19980311811 |
申请日期 |
1998.11.02 |
申请人 |
GENERAL MOTORS CORP <GM> |
发明人 |
COLLIER-HALLMAN STEVEN JAMES |
分类号 |
B62D6/00;B62D5/065;B62D5/07;B62D107/00;B62D137/00 |
主分类号 |
B62D6/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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