Deceleration warning system with self-purging pressure control
OwnerJerry Jonesinventor
Life of this patent
Estimating the term…
Abstract
A deceleration warning system for motor vehicles which uses engine vacuum to operate a warning signal visible to following traffic. Rapid intake duct pressure fluctuations, which can cause malfunction and deterioration of the vacuum switch, are filtered out by a pressure control unit. The pressure control unit allows a vacuum connection to the intake duct for one cylinder, most conveniently by means of a fitting that screws into a throttle synchronizing port. Fuel vapor, which can enter an intake vacuum system and condense therein, is continually purged while the engine is operating. This purging action allows the vacuum switch to be mounted below the intake duct without the danger of fuel accumulating in the system.
Claims7
A vacuum-operated deceleration warning device for motor vehicles comprising:
- (a) a normally open vacuum switch electrically connected to a signal light at the rear of the vehicle
- (b) a pneumatic connector between said vacuum switch and an engine intake duct, whereby a reduction in engine intake duct pressure due to throttle closure will close said switch and signal a reduction in vehicle speed to following traffic without application of the brakes
- (c) pressure stabilizing means to reduce high frequency pressure variations at said vacuum switch caused by the rapid opening and closing of an engine intake valve which continuously interrupts the airflow in said intake duct, whereby said vacuum switch is protected from high frequency cycling which can cause both inaccurate response and rapid wear.
Dependencies are inferred from the claim text.