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:
Jun. 04, 2002
Filed:
Mar. 05, 2001
Joshua Putman Styron, Canton, MI (US);
Yash Andrew Imai, Troy, MI (US);
George Byron Schwartz, Ann Arbor, MI (US);
Kevin Michael Morrison, Ann Arbor, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
An engine has an oiling system including a pump ( ) that delivers oil under nominal engine lubrication pressure to lubricate moving surfaces of the engine mechanism ( ). The system also has first and second control passages ( ) to effect engine compression ratio change by operating connecting rod length change mechanisms ( A, B, C). Selectively operated hydraulic control devices cause pressure in the first passage to be greater than pressure in the second passage to effect an increase in engine compression ratio and pressure in the second passage to be greater than pressure in the first passage to effect a decrease in engine compression ratio. Multiple embodiments of the invention are disclosed.