Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1998-05-26
2000-02-01
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
123 65PE, 123198F, 123333, 123335, 60324, F02D 1702, F02D 4104
Patent
active
060190906
ABSTRACT:
An engine control for an engine powering a watercraft is disclosed. The engine has a body defining at least two combustion chambers. An air supply system supplies air to the combustion chambers, the air supply system including a throttle control for controlling the flow rate of air to the engine, the throttle control moveable between an open and a closed position. A fuel supply system supplies fuel to the combustion chambers. At least one ignition element ignites the air and fuel supplied to the combustion chambers. At least one exhaust passage leads from the combustion chamber to a point exterior to the body through which exhaust may pass. Exhaust control means are provided for controlling the timing of the flow of exhaust through the passage. The engine control includes means for disabling the operation of at least one of the combustion chambers at an engine speed less than an engine speed corresponding to a watercraft planing speed, means for controlling the exhaust control means to reduce the exhaust flow time when at least one combustion chamber is disabled, and means for preventing combustion chamber disabling when a rate of change in position of the throttle control towards the open position exceeds a predetermined rate.
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Hairston Brian
Wolfe Willis R.
Yamaha Hatsudoki Kabushiki Kaisha
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