Automobile engine economizer

In an Automotive Engine Economizer for air-cooled and/or liquid-cooled internal combustion engines having a separate intake manifold for each bank of cylinders, and by which device the liquid primary fuel and the gaseous secondary fuel are combined with air and employed simultaneously to form the explosive charge, there being a liquid fuel carburetor to supply said charge by means of said intake manifolds to each bank of said cylinders, with said liquid fuel carburetors having been modified to require a percentage of gaseous secondary fuel to complete said explosive charge;

• an auxilliary liquid propane storage tank with vapor outlet means, located at some convenient place in the vehicle trunk space, communicating with a secondary gaseous fuel storage tank with pressure gauge and safety shut-off means, located in the engine compartment;
• a hand- and cable-controlled safety shut-off means to facilitate the employ of said gaseous secondary fuel by said air-cooled or liquid-cooled internal combustion engine or to shut down said economizer device or system when required;
• the combination of cut-off and pressure-regulator means for the gaseous secondary fuel communicating by line means with the modified air filters of said liquid fuel carburetors, said cut-off and pressure-regulator means being dependent upon and responsive to the engine temperature and intake manifold vacuum, there being no mechanical means for control of said gaseous secondary fuel by throttle members;
• a manifold-vacuum-operated master switch means to energize electrically said economizer device or system, and hot-air-damper-controlled micro-switch ground means or a liquid-coolant sensor switch ground means to establish or interrupt the electrical circuit of said device or system;
• an exhaust manifold back-pressure-regulated pressure regulator valve in the gaseous secondary fuel supply means, and line means to communicate said exhaust manifold back-pressure to the control chamber of said gaseous secondary fuel pressure regulator valve;
• a micropressure regulator valve and solenoid valve means communicating with said modified air filters of said liquid primary fuel carburetors, means to supplement restricted liquid primary fuel when said air-cooled or liquid-cooled engine is idling;
• a distributor-advance-vacuum-operated micro-switch menas to energize said solenoid valve;
• a combination vacuum tank and three-way solenoid valve means to control distributor advance mechanism to stabilize vacuum loses which may appear in the course of the operation of said device or system;
• a crankcase emission filter means to supply heat necessary to the proper conditioning of said gaseous secondary fuel, and line means to supply heated air from cooling-air dampers of air-cooled engine so equipped, or hose line and valve means to supply heated liquid medium from a liquid-cooled engine to said heat exchanger as needed;
• said economizer device or system being completely automatic once gaseous secondary fuel hand valve control is open and engine is started.