Degraded electronic throttle operation method and system

Details Degraded electronic throttle operation method and system Degraded electronic throttle operation method and system

1998-11-12

2000-03-14

Ip, Paul

Electricity: motive power systems

Constant motor current, load and/or torque control

318632, 318640, 123396, 123399, F02D 1110

Patent

active

060377305

ABSTRACT:
An electronic throttle assembly uses a torque motor and mechanical system to position the throttle. The assembly is configured to keep the throttle slightly open during times of electrical power failure to the torque motor. Inherent electromagnetic qualities of the torque motor provide a reluctance torque that varies depending on internal stator/rotor geometry and is present in the absence of electrical power to the motor. A mechanical system provides a counter torque. Aligning the throttle to the desired slightly open position at a point where the reluctance torque is countered by the mechanical torque, allows an engine controlled by the throttle to continue to operate even if electrical power to the torque motor is lost.

REFERENCES:
patent: 4995363 (1991-02-01), Terazawa et al.
patent: 5048484 (1991-09-01), Terazawa et al.
patent: 5048485 (1991-09-01), Terazawa et al.
patent: 5163402 (1992-11-01), Taguchi et al.
patent: 5267541 (1993-12-01), Taguchi et al.
patent: 5429090 (1995-07-01), Kotchi et al.
patent: 5823165 (1998-10-01), Sato et al.

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