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. 21, 1976
Filed:
Aug. 26, 1975
William C Bubniak, Troy, MI (US);
Edward D Klomp, Mount Clemens, MI (US);
William R Matthes, Troy, MI (US);
Neil A Schilke, Rochester, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An internal combustion engine system having a pressurized liquid coolant system whose coolant level automatically adjusts to effect rapid combustion chamber surface temperature rise on cold start. The coolant system includes a valve which automatically opens to drain coolant from the coolant system to a reservoir in response to coolant system pressure falling below a predetermined value because of temperature decrease on engine shut-off to establish a below-normal coolant level relative to the combustion chamber surface when the engine is cold and permits the drained coolant to be pumped back to the coolant system on cold start and then closes in response to coolant system pressure rise above the predetermined value because of coolant temperature increase on engine start-up to establish and maintain the normal coolant level for engine cooling. The coolant system further includes an orifice in the thermostat control valve which is sized to control the rate of air pressure change in the coolant system to prolong establishment of the normal coolant level for a substantial time period on cold start.