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:
Jan. 20, 1987
Filed:
Feb. 27, 1985
Wolfgang Schmid, Markgroningen, DE;
Porsche Aktiengesellschaft, , DE;
Abstract
An internal-combustion engine which includes two cylinder groups, of which one cylinder group operates constantly, whereas the second cylinder group is inactive in a part-load operation for better fuel economy. However, during forward or reverse operation of the vehicle and during the warm-up phase of the internal-combustion engine, the second cylinder group is provided with a reduced fuel-air mixture to prevent the engine from dying. An actuating device is provided which responds to certain parameters such as engine temperature and gear position. This actuating device controls a radial cam which interacts with the throttle valve for the second set of cylinders during these conditions to supply the required fuel-air mixture.