Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2005-12-06
2005-12-06
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
06971354
ABSTRACT:
A VCT system for an internal combustion engine having at least one camshaft and a VCT phaser mounted to the camshaft. The phaser having a plurality of advance chambers and retard chambers, an advance line in fluid communication with the advance chamber and leading to a cam bearing area of the camshaft, and a retard line in fluid communication with the retard chamber and leading to the cam bearing area of the camshaft. A cam bearing supports the cam bearing area around the camshaft and has ports aligned with the advance line and the retard line. A plurality of seals are located inside the cam bearing. At least one seal is between the ports to the advance line and the retard line, and a pair of seals are on opposite sides of the ports aligned with the advance and retard line. A control system is located separately from the phaser.
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Automotive Handbook, Bosch, “Electrohydraulic Pumps and Small Units”, pp. 634-637.
Pictorial Handbook of Technical Devices, Grafstein et al, “C-Valves”, 2 pages.
Smith Franklin R.
Wing Braman
Borg-Warner Inc.
Brown & Michaels PC
Denion Thomas
Dziegielewski Greg
Eshete Zelalem
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