IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0233124
(2002-08-30)
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발명자
/ 주소 |
- Mieny, Harry R.
- Kobos, Eugene A.
- Cheever, Jr., Gordon
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출원인 / 주소 |
- Delphi Technologies, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
13 인용 특허 :
14 |
초록
▼
A method for controlling a dual coil fuel injector having an opening coil and a closing coil includes issuing an opening coil pulse to the opening coil. The opening coil pulse has an opening coil pulse width (OCPW) and an opening coil turn on time (OCTOT). A closing coil turn on time (CCTOT) is calc
A method for controlling a dual coil fuel injector having an opening coil and a closing coil includes issuing an opening coil pulse to the opening coil. The opening coil pulse has an opening coil pulse width (OCPW) and an opening coil turn on time (OCTOT). A closing coil turn on time (CCTOT) is calculated dependent at least in part upon the OCPW. A closing coil pulse is issued to the closing coil at the calculated CCTOT.
대표청구항
▼
1. A computerized method of controlling a dual coil fuel injector in an engine, the dual coil fuel injector having an opening coil and a closing coil, said method comprising the steps of:issuing an opening coil pulse to the opening coil, the opening coil pulse having an opening coil pulse width (OCP
1. A computerized method of controlling a dual coil fuel injector in an engine, the dual coil fuel injector having an opening coil and a closing coil, said method comprising the steps of:issuing an opening coil pulse to the opening coil, the opening coil pulse having an opening coil pulse width (OCPW) and an opening coil turn on time (OCTOT);calculating a closing coil turn on time (CCTOT) dependent at least in part upon said OCPW; andissuing at said CCTOT a closing coil pulse to the closing coil. 2. The method of claim 1, wherein said calculating a CCTOT step comprises adjusting the CCTOT relative to the OCTOT dependent at least in part upon said OCPW. 3. The method of claim 1, comprising the further step of buffering the opening coil pulse and the closing coil pulse. 4. The method of claim 1, wherein said calculating a CCTOT step comprises increasingly delaying the CCTOT relative to the OCTOT as the OCPW decreases below a predetermined value, the CCTOT being increasingly advanced as the OCPW increases toward the predetermined value. 5. The method of claim 4, wherein said predetermined value is approximately 0.9 milliseconds. 6. The method of claim 4, wherein said predetermined value is approximately 0.7 milliseconds. 7. The method of claim 4, wherein said calculating a CCTOT step comprises delaying the CCTOT by approximately three hundred and seventy (370) microseconds relative to the OCTOT when the OCPW is approximately 0.6 milliseconds. 8. The method of claim 7, wherein said calculating a CCTOT step further comprises delaying the CCTOT by approximately three hundred (300) microseconds relative to the OCTOT when the OCPW is approximately 0.5 milliseconds. 9. The method of claim 8, wherein said calculating a CCTOT step comprises delaying the CCTOT by approximately two hundred and seventy (270) microseconds relative to the OCTOT when the OCPW is approximately 0.45 milliseconds. 10. The method of claim 9, wherein said calculating a CCTOT step comprises delaying the CCTOT by approximately two hundred and seventy (270) microseconds relative to the OCTOT when the OCPW is approximately 0.4 milliseconds. 11. The method of claim 1, comprising the further step of calculating the opening coil pulse width (OCPW) dependent at least in part upon an air pressure within a manifold of the engine, a rotational speed of a crank of the engine, and a angular position of a camshaft of the engine. 12. The method of claim 11, comprising the further steps of sensing the air pressure within the manifold, sensing the rotational speed of the crank, and sensing the angular position of the camshaft. 13. The method of claim 11, comprising the further step of calculating the OCTOT dependent at least in part upon an angular position of the crank and the rotational speed of the crank, and the angular position of the camshaft. 14. The method of claim 13, comprising the further step of sensing the angular position of the crank. 15. The method of claim 11, comprising the further step of calculating the CCTOT dependent at least in part upon the OCPW, an angular position of the crank, and an angular position of a cam of the engine. 16. The method of claim 15, comprising the further step of sensing the angular position of the cam. 17. A system for controlling the operation of a dual coil fuel injector in an engine, the dual coil fuel injector having an opening coil and a closing coil, the engine having a manifold, crank and cam, said system comprising:a manifold air pressure sensor, said manifold air pressure sensor sensing an air pressure within the manifold and issuing a manifold air pressure signal (MAP signal) indicative thereof;a crank sensor, said crank sensor sensing an angular position of the crank and issuing a crank position signal (CASP signal) indicative thereof;a cam position sensor, said cam position sensor sensing an angular position of the cam and issuing a cam position signal (CAM_POS signal) indicative thereof;an engine control module (ECM) havi ng a central processor and a memory, said engine control module receiving said MAP signal, said CASP signal and said CAM_POS signal, said engine control module issuing an opening coil pulse to the opening coil and a closing coil pulse to the closing coil, said opening coil pulse having an opening coil turn on time (OCTOT) and an opening coil pulsewidth (OCPW), said closing coil pulse having a closing coil pulse turn on time (CCTOT) and a closing coil pulse width (CCPW); andapplication software stored in said memory of and being executable by said ECM, said application software configured for calculating said CCTOT dependent at least in part upon said OCPW to adjust said CCTOT relative to said OCTOT and thereby adjust an overlap of said opening and closing coil pulses. 18. The system of claim 17, further comprising an OCPW look up table stored in said memory of said ECM, said OCPW look up table cross-referencing values of said manifold air pressure and said rotational speed of said crank to corresponding values of said OCPW, said application software instructing said central processing unit to access said OCPW look up table to obtain a value for said OCPW that corresponds to particular values of manifold air pressure and the rotational speed of said crank. 19. The system of claim 17, further comprising a CCTOT look up table stored in said memory of said ECM, said CCTOT look up table cross-referencing values of said crank angular position, said cam angular position and said OCPW, said application software instructing said central processing unit to access said CCTOT look up table to obtain a value for said CCTOT that corresponds to particular values of said crank angular position, said cam angular position and said OCPW. 20. The system of claim 17, wherein said CCTOT is increasingly delayed relative to said OCTOT as said OCPW decreases below a predetermined value, the CCTOT being increasingly advanced as the OCPW increases toward said predetermined value, thereby adjusting the overlap of said opening and closing coil pulses. 21. The system of claim 20, wherein said predetermined value is less than approximately 0.9 milliseconds. 22. The system of claim 20, wherein said predetermined value is less than approximately 0.7 milliseconds. 23. An engine control module (ECM) executing a method of controlling a dual coil fuel injector, the dual coil fuel injector having an opening coil and a closing coil, said method including the steps of:issuing an opening coil pulse to the opening coil of the dual coil fuel injector, the opening coil pulse having an opening coil pulse width (OCPW) and an opening coil turn on time (OCTOT);calculating a closing coil turn on time (CCTOT) dependent at least in part upon said OCPW; andissuing at said CCTOT a closing coil pulse to the closing coil of the dual coil fuel injector. 24. A motor vehicle having an engine control module and a dual coil fuel injector, said engine control module (ECM) executing a method of controlling the dual coil fuel injector, the dual coil fuel injector having an opening coil and a closing coil, said method including the steps of:issuing an opening coil pulse to the opening coil of the dual coil fuel injector, the opening coil pulse having an opening coil pulse width (OCPW) and an opening coil turn on time (OCTOT);calculating a closing coil turn on time (CCTOT) dependent at least in part upon said OCPW; andissuing at said CCTOT a closing coil pulse to the closing coil of the dual coil fuel injector. 25. A system for controlling the operation of a dual coil fuel injector in an engine, the dual coil fuel injector having an opening coil and a closing coil, said engine having an engine control module (ECM) issuing conventional single-coil fuel injector actuation signals, said system comprising:a direct injection driver receiving said single-coil fuel injector actuation signal and issuing opening and closing coil pulses to opening and closing coils of said dual coil fuel injector; an dapplication software executed by said direct injection driver, said application software determining an overlap value, said overlap value being dependent at least in part upon said single-coil fuel injector actuation signal, said overlap value determining an overlap between said opening and closing coil pulses.
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