Throttle valve drive apparatus
US5381769A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1993 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Apr 29, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2011/103
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A throttle valve drive apparatus comprises an actuator which serves to mechanically drive a throttle valve disposed in an intake passage of an internal combustion engine and is controlled in accordance with an instruction from a control unit, an accelerator lever which serves to mechanically drive the throttle valve and to adjust the opening degree of the throttle valve in accordance with an amount of operation performed by an operator, a first clutch disposed between rotary shafts of the actuator and the throttle valve and serving to transmit a turning force from the actuator to the throttle valve, and a second clutch disposed between rotary shafts of the accelerator lever and the throttle valve and serving to transmit the turning force from the accelerator lever to the throttle valve. In this apparatus, an engaging force of the first clutch is discriminated from that of the second clutch, one of the first and second clutches has a greater engaging force comprising an on-off constant engagement type clutch, the other clutch having a smaller engaging force comprising a constant engagement type clutch, and the on-off type clutch is switched on and off so as to transmit the turning f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.