Accession Number : ADD012357

Title :   Metering Fuel by Compressibility.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Vincent,Edward T ; Cheklich,George E

Report Date : 28 Mar 1978

Pagination or Media Count : 5

Abstract : This invention pertains to a piston engine timed fuel injection system wherein highly compressed fuel, e.g. at 20,000 p.s.i., is temporarily stored in a chamber isolated from the pressure source. A flow valve is opened to permit part of the stored fuel to expand into the combustion space. Spring force closes the valve while the injection pressure is relatively high, e.g. about 3000 psi. Fuel injection pressure at beginning of the injection period may be very high, e.g. 20,000 psi., thereby promoting improved fuel atomization, shorter ignition delay, lower rate of pressure rise in the combustion space, smoother combustion, and lower peak pressure in the combustion chamber. By injecting fuel from an isolated chamber it is possible to accurately limit the quantity in accordance with compressibility factors.

Descriptors :   *PATENTS, *FUEL METERS, *FUEL INJECTORS, *PISTON ENGINES, FUELS, COMPRESSIBLE FLOW, CONTROL, HIGH PRESSURE, STORAGE, CHAMBERS, ATOMIZATION, FUEL INJECTION, COMBUSTION, VALVES, SPRINGS

Subject Categories : Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE