US 2003/0079698 A1 · Method of engine cooling

Abstract

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.

Claims10

Dependent claims

A method of controlling an engine cooling system for an automobile, the cooling system comprising:

a variable coolant flow control valve for controlling the amount of coolant direct to the heat exchanger;
the method comprising the steps:
measuring the temperature of the engine;
comparing the measured temperature to a desired operating temperature to generate an error value;
and
opening said valve by a variable amount according to the error value when the error value is within a range determined by a first predetermined threshold and a second predetermined threshold.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/213,692Filed 7 Aug 2002

Priority

EP 01309211.931 Oct 2001

Published

1 May 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

F01P 7/164
By thermostatic control: by varying pump speed
F01P 7/048
By varying pump speed, e.g. by changing pump-drive gear ratio: using electrical drives
F01P 7/16
The coolant being liquid: by thermostatic control
F01P 2007/146
The coolant being liquid: using valves

Method of engine cooling

Life of this patent

Method of engine cooling

Life of this patent

Abstract

Claims10