GB141349A - Improvements relating to the operation of internal combustion engines at various altitudes - Google Patents

Abstract

141,349. Gruebler, F. April 6, 1920. Regulating; valves.-In four- or two-strokecycle engines, additional air is supplied to the engine cylinder by a separate pump according to variations in the atmospheric pressure, the pressure in the engine cylinder is kept constant by a regulating-valve in the pump inlet, and the pump discharges the air, without storage in a reservoir, into the engine cylinder so as to avoid loss of compression pressure at any altitude or engine speed. As shown, air supplied by a rotary pump g is admitted at the end of the suction stroke by a slide valve f through a piston-controlled port d, the quantity of air being regulated at different altitudes by a hand-controlled valve m on the pump inlet. The main charge is drawn in from a carburettor through the inlet valve c, and an auxiliary supply of fuel may be injected into the extra air charge through a nozzle y with a regulating- cone z. This fuel is delivered by a rotary pump x driven from the engine through change-speed gear. In modifications, the fuel supply may be controlled by throttling in the nozzle y; the extra fuel may be supplied at the inlet side of the pump g; the main fuel supply, or the extra fuel supply, may be dispensed with; the delivery from the air-pump may be at the cylinder head; and a single valve may be used for inlet and exhaust. The Specification as open to inspection under Sect. 91 (3) (a) states that the valve m may be controlled automatically, and that, for motorvehicles, the control of the supplementary carburettor may be coupled to that of the main car burattor. This subject-matter does not appear in the Specification as accepted.