Crank chamber compression type two cycle engine
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsKoji Abe, Kimihiro Nonaka, Osamu Nagabora
Life of this patent
Estimating the term…
Abstract
A crankcase compression, two cycle, internal combustion engine including an arrangement for facilitating starting by reducing the viscosity of lubricant which may remain on the cylinder bore after engine shut down. This viscosity decrease is accomplished by adding a low viscosity fluid through the cylinder bore during starting if the temperature of the engine is below a predetermined amount.
Claims24
A system for facilitating the starting of an internal combustion engine comprised of a cylinder bore, a piston reciprocating in said cylinder bore, a port communicating with said cylinder bore in an area swept by said piston, a starter for starting said engine, a temperature sensor for sensing temperature, a lubricating system for supplying lubricant to said engine including the sliding surfaces of said piston and said cylinder bore, a charge former for supplying a fuel air charge to said engine for combustion during starting and running, and means for supplying a fluid less viscous than the lubricant supplied by said lubricating system to said port only upon the starting of said engine for reducing the viscosity between said cylinder bore and said piston when the temperature sensed is below a predetermined value.
A method for facilitating the starting of an internal combustion engine comprised of a cylinder bore, a piston reciprocating in said cylinder bore, a port communicating with said cylinder bore in an area swept by said piston, a starter for starting said engine, a temperature sensor for sensing temperature, a lubricating system for supplying lubricant to said engine including the sliding surfaces of said piston and said cylinder bore, a charge former for supplying a fuel air charge to said engine for combustion during starting and running, said method comprising the steps of supplying a fluid less viscous than the lubricant supplied by said lubricating system to the port upon the starting of said engine for reducing the viscosity between the piston and cylinder bore and when the temperature sensed is below a predetermined value.
Dependencies are inferred from the claim text.