Southwest Research Institute

Kevin D Beaty

John Craig Hedrick

Robert Wayne Burrahm

Gary D Bourn

John Thomas Kubesh

David P Meyers

A method of operating a two-cycle internal combustion engine under low load conditions. A throttle is placed at the intake air system to reduce air intake into the engine cylinders. A pump is placed in the exhaust system, such that it creates reduced pressure downstream of the exhaust valves. In this manner, when the air intake ports close, the exhaust is evacuated and the air trapped in the cylinder is reduced. This permits fuel to be reduced so that the engine may operate in a low load state without losing combustion.

Method of operating uni-flow two-cycle engine during reduced load

Purely mechanical fuel injector for internal combustion engines utilizes a single plunger piston within a plunger barrel for fuel pumping, fuel/air mixing, and fuel injection functions. The plunger piston is reciprocated by a cam follower engaging a cam rotated by the engine. The fuel injector utilizes a fuel bypass valve to meter fuel to the fuel injector and/or bypass fuel to the fuel tank in response to the position of the air throttle valve on the engine air intake. Air is entrained into the fuel supply through an air fed mixing venturi.

Mechanical fuel injector for internal combustion engines

A method and apparatus for reducing oil consumption and oil deterioration in a reciprocating engine. The engine is provided with ceramic rings and ceramic cylinder linings. Minimal oil lubricant is adsorbed on the surface layer of the rings and liners to form a lubricating boundary-film on the rings and linings. Excess oil lubricant is restricted from entering the piston ring/cylinder lining region to preclude the formation of a hydrodynamic, full film lubricant layer between the rings and linings. Several engine designs are disclosed.

Growing community of inventors

Fort Collins, CO, United States of America

Kevin D Beaty