Controlled engine camshaft stopping position

Details Controlled engine camshaft stopping position Controlled engine camshaft stopping position

2006-06-27

2006-06-27

Dolinar, Andrew M. (Department: 3747)

Internal-combustion engines

Starting device

Condition responsive control of starting device

C123S19800E

Reexamination Certificate

active

07066127

ABSTRACT:
A system for bringing an internal combustion engine to a stop at a predetermined angular position of an engine shaft, such as a crankshaft or a camshaft, with respect to the engine's valves. The optimum shaft stop position is the point wherein the fewest lifters are collapsed the least amount. Exemplary methods and apparatus include using the engine starter motor to jog the stopped engine to the desired position; using the engine alternator to impose a variable electromagnetic load on the engine to bring the engine to a stop at the desired position; using variable firing of cylinders to control the deceleration profile to bring the engine to a stop at the desired position; and providing one or more detents formed in the shaft and using a shaft follower to control the stop position of the shaft by engaging the follower into a detent.

REFERENCES:
patent: 5117790 (1992-06-01), Clarke et al.
patent: 6218799 (2001-04-01), Hori
patent: 6647955 (2003-11-01), Sieber
patent: WO 01/44636 (2005-06-01), None

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