The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1992
Filed:
Mar. 28, 1991
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In the throttle valve control system for controlling a throttle valve by an actuator driven on the basis of PWM command signals generated according to accel pedal stroke and feed-backed throttle sensor signals, the throttle sensor signal obtained when the throttle valve is full closed is stored; the throttle sensor signal obtained when a full-close PWM command signal is applied to the actuator is detected; the full-close PWM command signal is corrected so that the stored throttle sensor signal matches the detected throttle sensor signal; and PWM command signals are generated on the basis of the corrected full-close PWM command signal. Therefore, it is possible to obtain a full-close PWM command signal whose pulse width accurately matches the actual throttle valve full-close position, irrespective of error or offset due to dispersion of the throttle sensor characteristic or A-D conversion characteristic of the control system.