Patent ID: 6745746
Filing Date: 2004-06-08
Classification: F02F

Abstract:
A method for increasing the thermal efficiency of an internal combustion engine comprising at least one cylinder and one piston reciprocating within each and every said cylinder providing each and every said piston with;(a) a compression stroke and a power stroke having a fixed stroke length wherein the departing speed of each and every said piston from the upper dead point of said piston in said power stroke being higher than the approaching speed of each and every said piston to said upper dead point in said compression stroke followed by said power stroke, and (b) an exhaust stroke and an intake stroke having said fixed stroke length wherein the departing speed of each and every said piston from said upper dead point of said piston in said intake stroke being higher than the approaching speed of each and every said piston to said upper dead point in said exhaust stroke followed by said intake stroke, and comprising more advanced spark timing means in a manner that, in said compression stroke before said upper dead point, said more advanced spark timing means ignites from 0 to 5 degrees earlier than a conventional internal combustion engine does, whereby said internal combustion engine increases said thermal efficiency.