Visteon Global Technolgoies, Inc.

Nicholas Harmer

Martin Nicholas Green

Kevin Paul Cutts

Ali Jalilevand

Joseph V Bejster

Davide Fausto Piccirilli

Matti K Vint

Guy Morgan

Keith E Liederman

Simon Petrovich

Mathew Haigh

James Richard Vanschagen

Leonhard Bartsch

This invention relates to a method of cooling an engine for an automobile, in particular to a method of operating a cooling system having a variable coolant flow control valve. The cooling system is operated in dependence upon the difference between a desired operating temperature and a measured operating temperature. If this difference falls within a first and a second predetermined threshold, the temperature control is effected by operation of the valve in dependence upon the difference. The method also includes operation of a variable speed fan and a variable speed pump, in dependence upon the difference between a desired operating temperature and a measured operating temperature.

Method of engine cooling

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.

Rotary valve for single-point coolant diversion in engine cooling system

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Cheam, United Kingdom

Nicholas Harmer