Low emission internal combustion engine and method of improving combustion

Claim 3

A low emission engine having a six stroke cycle comprising at least one cylinder having an exhaust valve, means for supplying fuel and air to the cylinder including an intake passageway having an intake valve, and means providing an ignition spark, a piston connected to a crank shaft disposed in the cylinder for reciprocation, means opening the exhaust valve during one stroke of every six strokes of the piston to provide an exhaust stroke for the cylinder, and means for actuating said means for supplying fuel and air during an intake stroke following the exhaust stroke by opening the intake valve during the intake stroke and closing the intake valve approximately after completion of said intake stroke so that both the intake valve and the exhaust valve are closed as a volume of fuel and air supplied to the cylinder during the intake stroke is subjected to a compression stroke, an expansion stroke and a second compression stroke prior to ignition by the spark provided by said ignition means to initiate the power stroke of the piston, said compression, expansion and second compression stroke insuring vaporization of the fuel and a homogenity of the fuel vapor and air mixture to improve the combustion of the mixture with a reduction in the undesirable exhaust products.

Claim 4

A low emission engine having a six stroke cycle comprising at least one cylinder having an exhaust valve, means for supplying fuel and air to the cylinder including an intake passageway having an intake valve, and means providing an ignition spark, a piston connected to a crank shaft disposed in the cylinder for reciprocation, means opening the exhaust valve during one stroke of every six strokes of the piston to provide an exhaust stroke for the cylinder, and means for actuating said means for supplying fuel and air during an intake stroke following the exhaust stroke by opening the intake valve during the intake stroke and closing the intake valve approximately after completion of said intake stroke so that both the intake valve and the exhaust valve are closed as a volume of fuel and air supplied to the cylinder during the intake stroke is subjected to a compression stroke, an expansion stroke and a second compression stroke prior to ignition by the spark provided by said ignition means to initiate the power stroke of the piston, said compression, expansion and second compression stroke insuring vaporization of the fuel and a homogenity of the fuel vapor and air mixture to improve the combustion of the mixture with a reduction in the undesirable exhaust products.

Claim 5

In an internal combustion engine having a housing containing at least one cylinder with a piston connected to a crank shaft disposed therein, each cylinder having an exhaust valve through which combustion products are removed from the cylinder and means for supplying a mixture of air and fuel to the cylinder including an intake valve, the improvement comprising means controlling both the exhaust valve and the intake valve and maintaining the exhaust and intake valves closed as the piston moves through a fuel preparatory compression stroke, a fuel preparatory expansion stroke, a second compression stroke and power stroke after introduction of a volume of the fuel and air mixture into the cylinder to isolate the mixture in the cylinder so that the volume of fuel and air mixture is compressed, expanded and recompressed prior to ignition to insure vaporization of the fuel and a homogeneous air and fuel vapor mixture at the time of ignition to decrease the production of undesirable combustion products.

Claim 6

In an internal combustion engine having a housing containing at least one cylinder with a piston connected to a crank shaft disposed therein, each cylinder having an exhaust valve through which combustion products are removed from the cylinder and means for supplying a mixture of air and fuel to the cylinder including an intake valve, the improvement comprising means controlling both the exhaust valve and the intake valve and maintaining the exhaust and intake valves closed as the piston moves through a fuel preparatory compression stroke, a fuel preparatory expansion stroke, a second compression stroke and power stroke after introduction of a volume of the fuel and air mixture into the cylinder to isolate the mixture in the cylinder so that the volume of fuel and air mixture is compressed, expanded and recompressed prior to ignition to insure vaporization of the fuel and a homogeneous air and fuel vapor mixture at the time of ignition to decrease the production of undesirable combustion products.

Claim 7

An internal combustion engine according to claim 3, wherein said engine has a six stroke engine cycle comprising an intake stroke, fuel preparatory compression stroke, a fuel preparatory expansion stroke, a second compression stroke, a power stroke and an exhaust stroke.