Knocking avoidance control system of a four-stroke engine...

Details Knocking avoidance control system of a four-stroke engine... Knocking avoidance control system of a four-stroke engine...

2005-12-06

2005-12-06

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Vibration compensating device

C701S111000

Reexamination Certificate

active

06971360

ABSTRACT:
An outboard motor includes four-cycle engine for a marine drive, and more particularly a four-cycle engine for a marine drive that has a vertically extending camshaft. The four-cycle engine includes at least one pre-ignition or knock sensor. An electronic control unit adjusts ignition timing and intake camshaft timing to protect the engine during a pre-ignition condition while improving fuel efficiency and preserving high engine output.

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