发明名称 |
Supplemental front wheel drive control system and method |
摘要 |
An electronic control is provided for controlling the drive speed of a supplemental drive relative to an engine driven main drive of a vehicle. A fluid pump driven by the engine provides pressurized fluid flow. The supplemental drive is driven by the pressurized fluid. A main drive sensor senses the speed of the main drive and responsively produces a main drive speed signal. A command knob is provided for selecting a desired speed relationship between the main and supplemental drives. A knob sensor senses the position of the command knob and responsively produces a modifier signal. A modifier circuit receives the main drive speed and modifier signals and responsively produces a modified main drive speed signal. A supplemental drive sensor senses the speed of the supplemental drive and responsively produces a supplemental drive speed signal. A processor produces an error signal responsive to a difference between received modified main and supplemental drive speed signals. The processor produces a first signal responsive to a product of the error signal and a preselected constant, produces a second signal responsive to an integral of the error signal, produces a third signal responsive to a derivative of the error signal and produces a pump control signal in response to a sum of the first, second, and third signals. An actuator receives the pump control signal and responsively adjusts the pump output.
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申请公布号 |
US5361208(A) |
申请公布日期 |
1994.11.01 |
申请号 |
US19900623155 |
申请日期 |
1990.12.06 |
申请人 |
CATERPILLAR INC. |
发明人 |
OLSON, STEPHEN R.;TATE, WILLIAM J.;SORRELLS, GILES K. |
分类号 |
B60K23/00;B60K17/348;B60K17/356;B60K23/08;B60K25/00;F16H61/02;F16H61/08;F16H61/46;F16H61/47;F16H63/40;F16H63/44;G01P3/00;G05D13/62;(IPC1-7):B60K25/00 |
主分类号 |
B60K23/00 |
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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