Patent ID: 6405693
Filing Date: 2002-06-18
Classification: F01L,F02D,Y02T

Abstract:
An internal combustion engine comprising:at least one cylinder that includes at least a first exhaust valve and a second exhaust valve, opened and closed by an electromagnetic force of an electromagnet and a biasing force of a spring; a detector that detects an engine revolution number of said internal combustion engine; and a timing controller that controls an interval between a first valve-opening timing at which the first exhaust valve starts opening and a second valve-opening timing at which the second exhaust valve starts opening, wherein the second valve-opening timing is different from the first valve-opening timing in accordance with the detected engine revolution number, and wherein the timing controller controls at least one of the first and second valve-opening timings such that the interval between the first and second valve-opening timings increases as the detected engine revolution number decreases.