Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

2008-03-27

2010-06-22

Winner, Tony H. (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C180S446000

Reexamination Certificate

active

07740103

ABSTRACT:
When a current input to a step-up voltage device of an electric power steering apparatus is equal to or higher than a first threshold current and an input voltage applied to the step-up voltage device is lower than a first threshold voltage, the step-up voltage device of the electric power steering apparatus discontinuously switches an output voltage to a voltage lower than a rated step-up voltage. When the input voltage becomes lower than a second threshold voltage which is lower than the first threshold voltage, the step-up voltage device sets the output voltage to a voltage equal to the input voltage.

REFERENCES:
patent: 4875539 (1989-10-01), Abukawa et al.
patent: 6216814 (2001-04-01), Fujita et al.
patent: 7358690 (2008-04-01), Kifuku
patent: 08-127355 (1996-05-01), None

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