System for regulating driving torque of vehicle

Details System for regulating driving torque of vehicle System for regulating driving torque of vehicle

1995-10-17

1997-10-21

Hurley, Kevin

Motor vehicles

With means for detecting wheel slip during vehicle...

123336, B60K 2816

Patent

active

056786514

ABSTRACT:
A system for reducing a driving torque of an engine employs a diaphragm type actuator for actuating a second throttle valve disposed in an intake passage of the engine in series to an accelerator-operated ordinary throttle valve in order to provide a simplified construction. A three way solenoid valve is arranged to selectively introduce a negative pressure such as an intake manifold vacuum, or atmospheric pressure into a working chamber of the diaphragm type actuator. By being supplied with the negative pressure or the atmospheric pressure, the diaphragm type actuator puts the second throttle valve either in a fully open position or in a closed position of about 1/8 opening degree. An orifice or some other flow resisting means is provided to make an opening movement slower than a closing movement of the second throttle valve.

REFERENCES:
patent: 4892076 (1990-01-01), Toshimits et al.
patent: 4971164 (1990-11-01), Fujita et al.
patent: 5079709 (1992-01-01), Hirako et al.
patent: 5222570 (1993-06-01), Kawamura et al.
patent: 5295552 (1994-03-01), Kageyama et al.

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