AUTOMATIC VALVE CONTROLS USE

Brand	Owner	Address	Description
SOFTCAM	WHITAKER CORPORATION, THE	4550 New Linden Hill Road Suite 450 Wilmington DE 198082952	Automatic valve controls for use in engines;SOFT CAM;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

An engine has variable-valve mechanisms. An engine control system has an engine control unit for executing automatic stop and start control. At an automatic-stop, the variable-valve mechanisms are controlled to obtain a valve operation characteristic suitable for a restart of the engine. When a catalyst is in an inactivated state, the variable-valve mechanisms are controlled to reduce the amount of residual gas leaking out from cylinders. At an automatic-start, the control of the variable-valve mechanism is prohibited and an intake air is adjusted by using a throttle valve. At an automatic-stop, the engine speed is abruptly reduced so that the engine speed passes through a resonant revolution speed area in a short period of time. When the voltage of a battery is low, the control of the variable-valve mechanism may be prohibited.