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:
May. 28, 1991
Filed:
Jun. 08, 1990
Richard S Davis, Romeo, MI (US);
Jordan R Lee, Sterling Heights, MI (US);
Glen R MacFarlane, Clarkston, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A pressure relief system is for an engine having an intake passage leading to a cylinder, a check valve in the intake passage to allow fluid flow toward the cylinder and obstruct fluid back-flow in the reverse direction, and a bypass port located on the intake passage so that the bypass port communicates with a downstream portion defined by the portion of the intake passage between the cylinder and check valve. The pressure relief system comprises a pressure relief passage connected between the bypass port and a reservoir enabling communication between the reservoir and downstream portion. A pressure-sensitive valve is connected to the pressure relief passage. The pressure-sensitive valve allows the communication if the pressure in the downstream portion exceeds a reference pressure by a predetermined amount, and obstructs the communication if the pressure in the downstream portion does not exceed the reference pressure by the predetermined amount.