Throttle valve control device
US5490487A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1995 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Apr 3, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2201/021
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A speed reduction gear including a semicircular control gear is provided coaxially with a motor shaft between a motor and a throttle valve. A connecting lever which has a valve opening contact and a valve closing contact is secured to a shaft of the throttle valve. When the control gear turns in the valve closing direction, it engages with the valve closing contact, and the throttle valve is closed. A safety stopper and its actuator are also provided. When the control gear turns in the valve opening direction while the stopper is driven by the actuator to extend in the path of the control gear, the control gear is prevented from further turning in the valve opening direction. When a cruise control switch is turned on, the stopper is retracted by the actuator from the passage and the gear turns in the valve opening direction until it abuts the valve opening contact of the connecting lever, which opens the throttle valve. As a result, the throttle valve is prevented from opening excessively when the electric control system fails and the throttle valve may be controlled in both directions by the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.