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. 23, 1997
Filed:
Mar. 22, 1996
Thomas J Hollis, Medford, NJ (US);
Other;
Abstract
A temperature control system, in a liquid cooled internal combustion engine equipped with a radiator, controls the state of a flow control valve for controlling flow of a temperature control fluid through a passageway leading to the radiator. Sensors detect the engine operation temperature, the temperature of the temperature control fluid, t1, and the ambient air temperature, t2. An engine computer receives signals from the sensors, produces control signals based on both of the sensor signals, and sends the control signals to the flow control valve to control the state of the valve. The values t1 and t2 define a plurality of mathematical functions of t1=f(t2) which form a plurality of two-dimensional curves on an orthogonal coordinate system having axes t1 and t2. Each of the curves divide the coordinate system into two regions, one on either side of the curve. The engine computer control signals prevent flow through the valve when coordinate pairs of t1 and t2 lie on a first region of the coordinate system and allow the flow when coordinate pairs of t1 and t2 lie on a second region of the coordinate system. The engine computer receives a measurement of the actual engine operational temperature, compares it to an optimum engine operation temperature, and selects an appropriate curve based on the comparison.