Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-02-15
2010-10-12
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
07810460
ABSTRACT:
A control system for an engine having a camshaft that is associated with an intake valve and a cam phaser that interfaces with the camshaft includes an air flow sensor that outputs first and second air flow signals based on mass air flow (MAF) delivered to the engine. An engine control module communicates with the air flow sensor and the cam phaser. The cam phaser adjusts an actuation time when the camshaft opens the intake valve during rotation of the camshaft. The control module further receives a rotational position signal based on the rotational position of the cam phaser and determines a rotational position of the cam phaser that delivers maximum air to the engine based on a first air flow signal measured prior to adjusting the cam phaser and a second air flow signal measured subsequent to adjusting the cam phaser.
REFERENCES:
patent: 6810844 (2004-11-01), Sellnau
patent: 6899093 (2005-05-01), Center
patent: 1676909 (2005-10-01), None
patent: 101182788 (2008-05-01), None
patent: 2633617 (1986-09-01), None
patent: 10101848 (2004-02-01), None
patent: 10349129 (2004-05-01), None
patent: 102004044993 (2005-04-01), None
patent: 102007054360 (2008-07-01), None
Office Action for German Patent Application No. 10 2008 007 480.2-26 dated Sep. 11, 2009; 5 pages.
Robert Bosch GmbH: Abgastechnik fur Dieselmotoren. 1. Ausgabe, 2004, S. 54; 2 pages.
Eshete Zelalem
GM Global Technology Operations Inc.
LandOfFree
Adaptive individual dynamic volumetric efficiency... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive individual dynamic volumetric efficiency..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive individual dynamic volumetric efficiency... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4212860