IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0197917
(2005-08-05)
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등록번호 |
US-7526915
(2009-07-01)
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발명자
/ 주소 |
- Futakuchi, Yorio
- Ookubo, Akihiko
- Kawabe, Hideaki
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출원인 / 주소 |
- Yamaha Hatsudoki Kabushiki Kaisha
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
A single cylinder engine includes an engine body having a combustion chamber, an intake opening and an exhaust opening which face toward the combustion chamber, an intake passage in communication with the combustion chamber through the intake opening, and an exhaust passage in communication with the
A single cylinder engine includes an engine body having a combustion chamber, an intake opening and an exhaust opening which face toward the combustion chamber, an intake passage in communication with the combustion chamber through the intake opening, and an exhaust passage in communication with the combustion chamber through the exhaust opening, an intake valve that opens and closes the intake opening, an exhaust valve that opens and closes the exhaust opening, an injector that injects a fuel toward the intake opening and into the intake passage, a ternary catalyst provided in the exhaust passage, and an engine control unit (ECU) that performs a decelerated operation to selectively execute a cycle for injection of a fuel from the injector, a quantity of which makes an air-fuel ratio in the combustion chamber substantially equal to a theoretical air fuel ratio, and a cycle for inhibition of fuel injection from the injector.
대표청구항
▼
What is claimed is: 1. A single cylinder engine comprising: an engine body including a combustion chamber, an intake opening and an exhaust opening which face toward the combustion chamber, an intake passage in communication with the combustion chamber through the intake opening, and an exhaust pas
What is claimed is: 1. A single cylinder engine comprising: an engine body including a combustion chamber, an intake opening and an exhaust opening which face toward the combustion chamber, an intake passage in communication with the combustion chamber through the intake opening, and an exhaust passage in communication with the combustion chamber through the exhaust opening; an intake valve that opens and closes the intake opening; an exhaust valve that opens and closes the exhaust opening; an injector that injects a fuel toward the intake opening and into the intake passage; a ternary catalyst provided in the exhaust passage; a control device that performs a decelerating operation in which the control device executes a cycle for injection of a fuel from the injector, a quantity of which makes an air fuel ratio in the combustion chamber substantially equal to a theoretical air fuel ratio, and a cycle for inhibition of fuel injection from the injector in which the fuel is not injected, such that both of the cycle for injection of a fuel from the injector and the cycle for inhibition of fuel injection from the injector occur at least one time during the decelerating operation; and a throttle valve provided in the intake passage; wherein the decelerating operation is executed with the throttle valve open. 2. The single cylinder engine according to claim 1, wherein the injector includes an injection port through which a fuel is injected, and the engine body includes an air supply passage through which air is conducted to the injection port. 3. The single cylinder engine according to claim 1, wherein the exhaust passage includes an accommodation casing that accommodates the ternary catalyst, a guide pipe through which gases from the combustion chamber is conducted to the accommodation casing, and the guide pipe is substantially constant in flow passage area. 4. A single cylinder engine comprising: an engine body including a combustion chamber, an intake opening and an exhaust opening which face toward the combustion chamber, an intake passage in communication with the combustion chamber through the intake opening, and an exhaust passage in communication with the combustion chamber through the exhaust opening; an intake valve that opens and closes the intake opening; an exhaust valve that opens and closes the exhaust opening; an injector arranged in the vicinity of the intake opening to inject a fuel toward the intake opening and into the intake passage; a ternary catalyst provided in the exhaust passage; a control device that performs a decelerating operation in which the control device executes a cycle for injection of a fuel from the injector, a quantity of which makes an air fuel ratio in the combustion chamber substantially equal to a theoretical air fuel ratio, and a cycle for inhibition of fuel injection from the injector in which the fuel is not injected, such that both of the cycle for injection of a fuel from the injector and the cycle for inhibition of fuel injection from the injector occur at least one time during the decelerating operation; and a throttle valve provided in the intake passage; wherein the decelerating operation is executed with the throttle valve open. 5. A single cylinder engine comprising: a cylinder block in which a combustion chamber is located; a cylinder head including an intake opening and an exhaust opening which face toward the combustion chamber, the cylinder head being joined to the cylinder block; an intake port in communication with the combustion chamber through the intake opening, and an exhaust port in communication with the combustion chamber through the exhaust opening; an exhaust pipe connected to the cylinder head and in communication with the exhaust opening; an intake valve that opens and closes the intake opening; an exhaust valve that opens and closes the exhaust opening; an injector mounted to the cylinder head to inject a fuel toward the intake opening; a ternary catalyst provided in the exhaust pipe; a control device that performs a decelerating operation in which the control device executes a cycle for injection of a fuel from the injector, a quantity of which makes an air fuel ratio in the combustion chamber substantially equal to a theoretical air fuel ratio, and a cycle for inhibition of fuel injection from the injector in which the fuel is not injected, such that both of the cycle for injection of a fuel from the injector, and the cycle for inhibition of fuel injection from the injector occur at least one time during the decelerating operation; and a throttle valve provided in the intake passage; wherein the decelerating operation is executed with the throttle valve open. 6. A vehicle comprising: a vehicle body; a wheel mounted to the vehicle body; and a single cylinder engine that drives the wheel, the single cylinder engine including: an engine body including a combustion chamber, an intake opening and an exhaust opening which face toward the combustion chamber, an intake passage in communication with the combustion chamber through the intake opening, and an exhaust passage in communication with the combustion chamber through the exhaust opening; an intake valve that opens and closes the intake opening; an exhaust valve that opens and closes the exhaust opening; an injector that injects a fuel toward the intake opening and into the intake passage; a ternary catalyst provided in the exhaust passage; a control device that performs a decelerating operation in which the control device executes a cycle for injection of a fuel from the injector, a quantity of which makes an air fuel ratio in the combustion chamber substantially equal to a theoretical air fuel ratio, and a cycle for inhibition of fuel injection from the injector in which the fuel is not injected, such that both of the cycle for injection of a fuel from the injector, and the cycle for inhibition of fuel injection from the injector occur at least one time during the decelerating operation; and a throttle valve provided in the intake passage; wherein the decelerating operation is executed with the throttle valve open.
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