Sanshin Kogyo Kabushiki Kaisha

Yamaha Hatsudoki Kabushiki Kaisha

Motoi Tobinaga

Kenichi Handa

Shigeo Okumura

Shinya Atsumi

Tomio Iwai

Yutaka Nasuda

Shingeo Okumura

An ignition control system for an internal combustion engine which includes a microcomputer which operates to control the ignition timing in response to engine speed and engine temperature signals individually and in preselected combination with an engine air flow signal and/or a lubricant level signal during predetermined engine running conditions. These predetermined running conditions include low speed, warm up, overhead, cruising, and overspeed engine running conditions, as well as a low lubricant level condition. The ignition control system is also capable of detecting and responding to abnormal combustion running conditions and setting and optimum spark advance during the starting of the engine.

Ignition control system for an internal combustion engine

An ignition control system for an internal combustion engine which includes a microcomputer which operates to control the ignition timing in response to engine speed and engine temperature signals individually and in preselected combinations with an engine throttle or air flow signal during predetermined engine running conditions. These predetermined running conditions include low speed, warm up, overheat, cruising, and overspeed engine running conditions. The ignition control system is also capable of detecting and responding to abnormal combustion running conditions and setting an optimum spark advance during the starting of the engine.

A system for preventing overheating of an internal combustion engine comprised of a temperature detector which activates an electronic circuit to intermittently interrupt engine ignition spark to gradually decelerate the engine. The electronic circuit has an oscillator which is activated by the temperature detector whose duty cycle is gradually increased up to a maximum. The oscillator output energizes a gating circuit to turn on a thyristor which connects an ignition charging circuit to ground. Thus interrupting the ignition spark.

Overheat preventing system for internal combustion engines

A lubricating system for a two cycle engine, particularly of the outboard type, wherein the engine has a separate lubricating system and lubricant is supplied to this system by a relatively small delivery tank via gravity feed. In addition, an arrangement is provided for supplying lubricant to the delivery tank from a separate oil storage tank to maintain a predetermined liquid level in the delivery tank. This system includes a pump located in the separate storage tank. In accordance with certain embodiments of the invention, the pump is operated if the liquid level in the delivery tank falls below a predetermined level. In accordance with one embodiment, the operation of the pump is stopped when the liquid level exceeds a predetermined level.

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Hamamatsu, Japan

Motoi Tobinaga