dependent a specific pressure other than that of combustion-air, e.g. of exhaust, cooling fluid, lubricant

Advancing or retarding electric ignition spark; Control therefor > automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions > using mechanical means > dependent on fluid pressure in engine, e.g. combustion-air pressure > dependent on a specific pressure other than that of combustion-air, e.g. of exhaust, cooling fluid, lubricant

Advancing or retarding ignition; Control therefor > automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions (dependent on position of personal controls of engine F02P5/02) > using mechanical means > dependent on fluid pressure in engine, e.g. combustion-air pressure > dependent a specific pressure other than that of combustion-air, e.g. of exhaust, cooling fluid, lubricant