Control apparatus in a motor vehicle for controlling a throttle valve on the base of actuation of an accelerator pedal and intake air quantity
US5391127A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | May 14, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/501
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control apparatus with a fail-safe function not only serves to enhance acceleration performance of a motor vehicle but also prevents a runaway upon occurrence of a failure in a throttle control system. An accelerator pedal actuation detector detects a magnitude of depression of an accelerator pedal by the driver. A vehicle speed detector detects a running speed of the vehicle. A gear ratio detector detects a gear ratio or gear position of a transmission. A plurality of target throttle opening patterns representing relations between target values of throttle opening degree and depression magnitudes of the accelerator pedal are stored in a memory. A first controller selectively determines an optimum target throttle opening pattern on the basis of the vehicle speed and the gear ratio to thereby control a throttle actuator for actuating a throttle in accordance with the selected pattern. An intake air quantity detector detects a quantity of intake air fed to an engine of the motor vehicle. A comparator compares a target intake air quantity determined on the basis of the depression magnitude of the accelerator pedal and an actual intake air quantity. When the actual intake air quantit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.