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:
Apr. 01, 2003
Filed:
Feb. 11, 2002
Davide F. Piccirilli, Livonia, MI (US);
Leonhard Bartsch, Baesweiler, DE;
Keith E. Liederman, Brighton, MI (US);
Matti K. Vint, Canton, MI (US);
Joseph V. Bejster, Dearborn, MI (US);
Nicholas P. Harmer, Cheam, GB;
Martin Green, Billericay, GB;
Mathew E. Haigh, Chelmsford, GB;
Ali Jalilevand, Ann Arbor, MI (US);
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
A rotary valve provides single point flow control of coolant within the cooling system of an internal combustion engine. The valve distributes coolant flow from the engine in predetermined flow modes to either 1) the radiator and heater simultaneously, 2) a bypass circuit only, 3) the heater only, or 4) the radiator and bypass simultaneously. The single-point coolant control results in advantages of shorter warm-up times, a lower pressure drop (reducing power consumption by the pump), reduced engine emissions and fuel consumption, improved cabin heater performance, and improved engine durability due to reduced thermal shocks to the engine components by virtue of more precise control of engine operating temperature.