Patent ID: 6443125
Filing Date: 2002-09-03
Classification: F02B,F02D,Y02T

Abstract:
A high-efficiency vehicle and engine, wherein the vehicle has at least four wheels, comprising:a body; and a reciprocating piston four-stroke spark-ignition internal-combustion engine connected to said body to provide power for moving the vehicle, said engine having at least one reciprocating piston slidably mounted in a cylinder, a crankshaft, a connecting rod for linking the reciprocating piston to the crankshaft, an engine cylinder displacement volume, a compression ratio, a maximum power output and a compression ratio adjustment mechanism to vary the combustion chamber volume; wherein the engine has fewer than three of said reciprocating pistons, and the vehicle has an engine maximum power output to vehicle weight ratio of at least 0.055 kilowatts of engine power per kilogram of vehicle weight and a maximum engine power to engine cylinder displacement ratio of at least 80 kilowatts per liter.