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:
Nov. 09, 1999
Filed:
May. 21, 1998
Applicant:
Inventor:
Fritz Schmidt, Waiblingen, DE;
Assignee:
DaimlerChrysler AG, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01P / ;
U.S. Cl.
CPC ...
1231 / ; 123 4144 ;
Abstract
In a method of operating a piston-type internal combustion engine including cylinders with gas exchange valves of which at least some are closed when the engine is operated in an engine-driven state above a predetermined engine speed and the engine includes an electrically operated coolant circulating pump wherein the coolant circulating pump speed is controlled depending on the number of cylinders shut down during operation in the engine driven state.