IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0441920
(2003-05-20)
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발명자
/ 주소 |
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출원인 / 주소 |
- Yamaha Marine Kabushiki Kaisha
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대리인 / 주소 |
Knobbe, Martens, Olson &
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인용정보 |
피인용 횟수 :
0 인용 특허 :
14 |
초록
▼
An engine control system and a method control the engine speed of a watercraft that is propelled by a stream of water generated by propulsion unit driven by an engine. The system and method detect whether the propulsion unit is generating the stream of water. The system and method limit the maximum
An engine control system and a method control the engine speed of a watercraft that is propelled by a stream of water generated by propulsion unit driven by an engine. The system and method detect whether the propulsion unit is generating the stream of water. The system and method limit the maximum engine speed to a first speed when the propulsion unit is generating the stream of water and limit the maximum engine speed to a second speed, lower than the first speed, when the propulsion unit is not generating the stream of water.
대표청구항
▼
1. A personal watercraft comprising a hull, an internal combustion engine positioned in the bull, a fuel injection system, an ignition system, an engine control system, an engine speed sensor, a propulsion unit, at least two pressure sensors, a first pressure sensor configured to detect a water pres
1. A personal watercraft comprising a hull, an internal combustion engine positioned in the bull, a fuel injection system, an ignition system, an engine control system, an engine speed sensor, a propulsion unit, at least two pressure sensors, a first pressure sensor configured to detect a water pressure, a second pressure sensor, the first pressure sensor and the second pressure sensor communicating with the engine control system, the engine control system configured to detect engine speed and control engine speed through at least one of the fuel injection system and the ignition system based on a comparison of the output of the first pressure sensor and the second pressure sensor.2. The watercraft of claim 1, wherein the first pressure sensor is mounted on the bottom surface of the hull.3. The watercraft of claim 1, wherein the first pressure sensor is mounted in the vicinity of an inlet port of the propulsion unit.4. The watercraft of claim 1, wherein the first pressure sensor is mounted inside the propulsion unit.5. The watercraft of claim 1, wherein the first pressure sensor is mounted in the vicinity of an outlet port of the propulsion unit.6. The watercraft of claim 1, wherein the second pressure sensor is mounted on the watercraft above a watercraft waterline.7. A method of controlling an internal combustion marine engine associated with a watercraft, the method comprising injecting fuel into the internal combustion engine where the fuel mixes with air, igniting the air/fuel mixture, sensing a speed of the engine, sensing a water pressure, sensing a second pressure, comparing the sensed water pressure with the sensed second pressure, comparing the sensed water pressure and the sensed second pressure, and disabling combustion based on the comparison.8. The method of claim 7, wherein combustion is restored when the comparison of the sensed water pressure and the sensed second pressure is below the predetermined comparison value.9. The method of claim 7, wherein disabling combustion comprises intermittently stopping fuel injection to at least one cylinder of the engine.10. The method of claim 7, wherein disabling combustion comprises intermittently stopping ignition to at least one cylinder of the engine.11. A method of controlling an internal combustion marine engine associated with a watercraft, the method comprising injecting fuel into the internal combustion engine where the fuel mixes with air, igniting the air/fuel mixture, sensing a watercraft speed through a watercraft speed sensor, comparing the sensed watercraft speed and a predetermined watercraft speed, disabling combustion and therefore limiting engine speed if the sensed watercraft speed is less than the predetermined watercraft speed.12. The method of claim 11, wherein combustion in the engine is restored if the sensed watercraft speed is above the predetermined watercraft speed.13. The method of claim 11, wherein disabling combustion comprises intermittently stopping fuel injection to at least one cylinder of the engine.14. The method of claim 11, wherein disabling combustion comprises intermittently stopping ignition to at least one cylinder of the engine.15. The method as defined in claim 11, wherein a watercraft speed is sensed to determine whether water is flowing through the propulsion unit and engine speed is limited based on the sensed watercraft speed.
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