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:
Sep. 14, 1982
Filed:
Oct. 16, 1980
John H Stang, Columbus, IN (US);
David A Ruthmansdorfer, Columbus, IN (US);
Dean H Reichenbach, Columbus, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
1 A dual loop cooling system for an internal combustion engine including a first loop or circuit (36) employing engine lubrication oil for cooling the engine cylinder and a second loop or circuit (48) employing water for cooling the aftercooler and engine head. A first flow control valve (72) and heat exchanger (54) operate to maintain an ideal temperature for the lubrication oil in the range of 200.degree.-250.degree. F. A radiator (86) and second flow control valve (94) in the second circuit (48) operate in response to engine output torque to cause the intake air to be at its lowest temperature at maximum engine output torque and to be at its highest temperature at minimum engine output torque. In one embodiment, the control valve (94) responds to engine water outlet temperature as determined by sensor (104). In another embodiment, a control valve (94') responds to intake manifold air pressure as determined by sensor (106). In yet another embodiment, valve (94') responds to compressor discharge air temperature as determined by sensor (108) to produce the desired transient response.