Vacuum control apparatus

Control apparatus for a vehicle having a speed control unit, said speed control unit being responsive to the vacuum created by the engine of said vehicle and including a first vacuum line from the engine of said vehicle to said speed control unit and a second vacuum line from said speed control unit to a throttle servo of said engine;

• said control apparatus including vacuum measuring gauge means disposed in said first vacuum line from said vehicle engine to said speed control unit, flow restricting means disposed in said first vacuum line, an air supply line including a filter providing a supply of air at atmospheric pressure to said second vacuum line from said speed control unit to said throttle servo, adjustable valve means disposed in said air supply line for selectively metering said air into said second vacuum line;
• whereby said valve means is adjustable by the vehicle operator in relation to the engine vacuum as displayed on said vacuum measuring gauge so that a selected flow of air can be metered into said second vacuum line when the vehicle speed drops sufficiently to decrease the vacuum created by said engine and thereby prevent said speed control unit from opening said throttle excessively while enabling the operator to selectively control the operation of the engine.