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:
Jun. 13, 2000
Filed:
Aug. 18, 1998
Kenro Nakashima, Kanagawa-ken, JP;
Isuzu Ceramics Research Institute Co., Ltd., Kanagawa-ken, JP;
Abstract
In the combustion chamber structure of the gas engine the combustion chamber members are formed with the sub-communication holes allowing communication between the main combustion chambers and the pre-combustion chambers and also with throat holes in which throat hole valves are installed. This structure avoids excessively high compressed air pressure in the main combustion chambers during the compression stroke and reduces the compression work to improve performance. The sub-communication holes open at the wall surfaces situated in the main combustion chambers and also at the upper wall surfaces of the pre-combustion chambers. The axes of the ports of the sub-communication holes opening to the main combustion chambers extend toward the center axes of the throat holes. The axes of the ports of the sub-communication holes opening to the pre-combustion chambers extend offset from the center axes of the pre-combustion chambers. Hence, this gas engine can reduce the compression work, lower the maximum pressure of the compressed air at the end of the compression stroke, prevent the gas fuel from remaining in the pre-combustion chambers, and enhance the air utilization factor, improving thermal coefficient.