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:
Dec. 16, 2003
Filed:
Mar. 25, 2002
Bradley Alan Boyer, Canton, MI (US);
Joshua Putman Styron, Canton, MI (US);
Mark Michael Madin, Canton, MI (US);
V. Durga Nageswar Rao, Bloomfield Hills, MI (US);
Yash Andrew Imai, Troy, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system and method for controlling a pressure responsive device in an engine is provided. The device can vary a compression ratio in an engine cylinder. The method includes supplying fluid pressure to the pressure responsive device to change a compression ratio in the cylinder. The method further includes indicating when the device has deteriorated response. Finally, the method includes increasing the fluid pressure to the device to change the compression ratio in the cylinder in response to the indication.