[특허]Ignition device for internal combustion engine

DENSO Corporation

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Ignition device for internal combustion engine

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02P-003/05 F02P-003/02 F02P-003/055
미국특허분류(USC)	123/644; 123/630
출원번호	US-0118327 (2005-05-02)
우선권정보	JP-2004-141211(2004-05-11); JP-2005-002819(2005-01-07)
발명자 / 주소	Ando,Koji Kawakita,Haruo
출원인 / 주소	DENSO Corporation
대리인 / 주소	Nixon &
인용정보	피인용 횟수 : 3 인용 특허 : 5

초록
▼

An ignition device for an internal combustion engine includes a power transistor connected to a primary coil of an ignition coil, a current sensing resistor connected in series with the power transistor, a constant current circuit and an abnormal oscillation control circuit that connects the gate resistor with the feedback circuit when the constant current circuit controls the primary current to be constant. The constant current circuit has a gate resistor connected in series to the control gate of the power transistor and a feedback circuit connected be...

대표
청구항
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What is claimed is: 1. An ignition device for an internal combustion engine comprising: a power transistor, having a main gate to be connected to a primary coil of an ignition coil and a control gate, for supplying primary current to the primary coil by supplying gate current to the control gate; a current sensing resistor connected in series with said power transistor; a constant current circuit, having a gate resistor connected in series to the control gate of said power transistor and a feedback circuit connected between the gate resistor and said current sensing resistor, for controlling the primary current to have a constant amount; and switching means for switching connection between the gate resistor and the feedback circuit, wherein said switching means turns on when said constant current circuit controls the primary current to have the constant amount. 2. The ignition device as claimed in claim 1, wherein said switching means turns off to disconnect the gate resistor from the feedback circuit when said constant current circuit does not operate to control the primary current. 3. The ignition device as claimed in claim 1, wherein said switching means turns on to connect the gate resistor and the feedback circuit when an amount of the primary current reaches a first preset value that is smaller than the constant amount. 4. The ignition device as claimed in claim 3, wherein said switching means turns off to disconnect the gate resistor from the feedback circuit when the amount of the primary current does not reach the first preset value. 5. The ignition device as claimed in claim 3, further comprising fail signaling means, connected to the current sensing resistor, for providing a fail signal if an amount of the primary current is larger than a second preset value. 6. The ignition device as claimed in claim 5, wherein the second preset value is smaller than the first preset value. 7. The ignition device as claimed in claim 5, wherein said switching means stops said fail signaling means from providing the fail signal when the amount of the primary current reaches the first preset value. 8. The ignition device as claimed in claim 7, wherein said fail signaling means starts providing the fail signal when the amount of the primary current reaches a third preset value that is smaller than the first preset value. 9. The ignition device as claimed in claim 1, further comprising coil's abnormality detecting means and second switching means for stopping the gate current supplied to the gate of said power transistor when said coil's abnormality detecting means detects an abnormality. 10. The ignition device as claimed in claim 1, wherein said feedback circuit comprises: a constant current controlling comparator having an input terminal connected to the current sensing resistor; and a transistor having a control gate connected to the constant current controlling comparator and a main gate connected between the gate resistor and a ground. 11. The ignition device as claimed in claim 5, wherein said fail signaling means comprises: a fail detecting comparator having an input terminal connected to the current sensing resistor and an output terminal providing an output signal when the potential of the input terminal thereof reaches a first threshold level of the comparator; and a logic circuit, connected to the output terminal of said fail detecting comparator, for providing the fail signal when the logic circuit receives the output signal from the fail detecting comparator. 12. The ignition device as claimed in claim 11, wherein: said fail signaling means comprises another comparator having an input terminal connected to the current sensing resistor and an output terminal connected to the logic circuit, and said another comparator provides an output signal for stopping the fail signal when the potential of the input terminal thereof becomes a second threshold level that is higher than the first threshold level. 13. The ignition device as claimed in claim 12, wherein said switching means comprises a transistor having a control gate connected to said another comparator to turn on said transistor to connect the gate resistor and the feedback circuit when said another comparator provides the output signal. 14. An ignition device for an internal combustion engine comprising: a power transistor, having a main gate to be connected to a primary coil of an ignition coil and a control gate, which supplies primary current to the primary coil by supplying gate current to the control gate; a current sensing device connected in series with said power transistor; a constant current circuit, having a gate resistor connected in series to the control gate of said power transistor and a feedback circuit connected between the gate resistor and said current sensing device, which controls the primary current to have a constant amount; and a transistor which switches connection between the gate resistor and the feedback circuit so that the transistor turns on when said constant current circuit controls the primary current to have the constant amount. 15. The ignition device as in claim 14, wherein said transistor turns off to disconnect the gate resistor from the feedback circuit when said constant current circuit does not operate to control the primary current. 16. The ignition device as in claim 14, wherein said transistor turns on to connect the gate resistor and the feedback circuit when an amount of the primary current reaches a first preset value that is smaller than the constant amount. 17. The ignition device as in claim 16, wherein said transistor turns off to disconnect the gate resistor from the feedback circuit when the amount of the primary current does not reach the first preset value. 18. The ignition device as in claim 14, further comprising a fail signaling circuit, connected to the current sensing device, which provides a fail signal if an amount of the primary current is larger than a preset value. 19. The ignition device as in claim 16, further comprising a fail signaling circuit connected to the current sensing device, which provides a fail signal if an amount of the primary current is larger than a second preset value. 20. The ignition device as in claim 19, wherein the second preset value is smaller than the first preset value. 21. The ignition device as claimed in claim 20, wherein said transistor stops said fail signaling circuit from providing the fail signal when the amount of the primary current reaches the first preset value. 22. The ignition device as in claim 18, wherein said fail signaling circuit comprises: a fail detecting comparator having an input terminal connected to the current sensing device and an output terminal providing an output signal when the potential of the input terminal thereof reaches a threshold level of the comparator; and a logic circuit, connected to the output terminal of said fail detecting comparator, which provides the fail signal when the logic circuit receives the output signal from the fail detecting comparator.

이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 (3)

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내보내기 구분	파일저장 인쇄 메일전송
구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
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특허 상세정보

Ignition device for internal combustion engine

초록
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대표
청구항
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이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 (3)

IPC 상위 출원인

과제정보

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원문조회

IPC 상세정보(version : 201201)

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특허 상세정보

Ignition device for internal combustion engine

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대표청구항 ▼

이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 (3)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

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