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:
Mar. 12, 1996
Filed:
May. 26, 1995
Ronald P Maloney, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
Crankcase ventilation systems for internal combustion engines generally utilize external lines which increase the complexity of the engine while decreasing the engine's flexibility. Additionally, systems which utilize internal methods for ventilating the blow-by gas leaking past the piston rings generally do not properly ventilate the crankcase. The present invention overcomes these problems by providing crankcase ventilation system which utilizes a simplified design for an internal combustion engine with hydraulically actuated valves. A passage is disposed within the engine for fluid communication between a crankcase and a combustion chamber. A valve means is disposed within the passage for controlling the communication therebetween. Either by utilizing a means for sensing the pressure within the crankcase or in sequential cycles, an intake valve is closed as the valve means is simultaneously opened by any suitable means so that blow-by gas within the crankcase flows freely through the passage to the combustion chamber for reburning. The present invention is simple, cost-effective, and eliminates additional external lines for an effective method of ventilating the crankcase.