US 4,070,998 AGranted

Compression ignition control pressure heat engine

OwnerHarlow B. Growinventor

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Abstract

A fuel injected heat engine of the reciprocating type wherein a piston moves reciprocally within a cylinder to compress gases for the support of combustion and to be moved by burning gases to turn a crank with torque, there being a low compression storage chamber of substantial volume normally open into the cylinder and closed by upward movement of the piston to withhold gases at combustion supporting temperature, there being a high compression auto ignition chamber of limited volume comprising the upper portion of the cylinder and isolated from said low compression chamber by said piston closure thereof for continued compression of combustion supporting gases by said piston movement to auto ignition temperature, and there being constant volume fuel injection means for injecting fuel at high pressure into the auto ignition chamber and at a progressively diminishing rate as the first mentioned storage chamber is re-opened and as the cylinder pressure decreases during the effective power stroke.

Claims6

Dependent claims

A compression ignition and controlled diminishing pressure cycle heat engine wherein a piston reciprocates in a cylinder and is acted upon by the expansion of burning fuel to perform work, and including;

drive means coupled to the piston for reciprocation of said piston in the cylinder between bottom and top dead center positions, a port opening into the cylinder intermediate the top and bottom dead center positions of said piston and adapted to be opened and closed by downward and upward movement of said piston respectively, a closed storage chamber in open communication with the port for the exit and re-entry of gases from and into the cylinder, the port being positioned for closure by the piston and the entrappment of gases in the said storage chamber at combustion supporting pressure, an auto ignition chamber of minimized volume between said port and a head closing the top end of the cylinder for compression of gases to ignition temperature, and a full stroke fuel pump means injecting fuel into the cylinder from the top position of the piston and substantially throughout its effective work stroke, said port being opened by the piston for re-entry of gases from said storage chamber for support of continued combustion of fuel.

Dependencies are inferred from the claim text.