The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1993
Filed:
Oct. 30, 1992
Applicant:
Inventor:
Hiroshi Kanesaka, Kawasaki, JP;
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ; F02B / ;
U.S. Cl.
CPC ...
123403 ; 123405 ;
Abstract
An Otto-cycle engine in which the expansion ratio is set in the range 11:1 to 16:1, comparable to the expansion ratios of Diesel engines and which has a rotary valve mounted in the suction passage. The valve is equipped with a valve actuating timing-adjusting device. The valve is closed prior to the bottom dead centre of each induction stroke to set the expansion ratio higher than the compression ratio set under full load conditions. The engine further includes a knock sensor for sensing or forecasting knocking. Valve closure is advanced by the adjusting device in response to the output signal from the sensor to adjust the compression ratio of the engine.