Throttle valve control system and the method therefor
US5088461A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1991 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Mar 28, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.