Electric power steering control system

Details Electric power steering control system Electric power steering control system

2005-06-07

2005-06-07

Hurley, Kevin (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C701S042000

Reexamination Certificate

active

06902028

ABSTRACT:
Conventionally, there was a problem that in cases when it is difficult to place a temperature sensor in the vicinity of a heat-generating portion, overheating could not be prevented. Disclosed is an electric power steering control system including a torque sensor for detecting steering force of a steering system; a motor current determination unit for determining the motor current based on the steering force detected by the torque sensor; a temperature sensor for detecting an ambient temperature; a coefficient setting unit for setting a coefficient in accordance with the detected temperature obtained by means of the temperature sensor; a motor current detection unit for detecting a motor current being passed to a motor; a maximum current limit value calculation unit for calculating a maximum current limit value based on the detected current and the coefficient; a current limiting unit for selecting the smaller value between the motor current determined by the motor current determination unit and the maximum current limit value calculated and outputting this as a target current; and a motor current control section for passing the target current to the motor in such a way that the motor current is equal to the detected current, whereby a motor current limit being set according to temperature is applied.

REFERENCES:
patent: 4771843 (1988-09-01), Shimizu
patent: 4789040 (1988-12-01), Morishita et al.
patent: 4793431 (1988-12-01), Eto et al.
patent: 5355315 (1994-10-01), Daido et al.
patent: 5889378 (1999-03-01), Hayashi
patent: 6326753 (2001-12-01), Someya et al.
patent: 6380706 (2002-04-01), Kifuku et al.
patent: 6448738 (2002-09-01), Burton et al.
patent: 2001/0026134 (2001-10-01), Fukumoto et al.
patent: 2003/0169001 (2003-09-01), Murakami et al.
patent: 11-59444 (1999-03-01), None

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