IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0239044
(2001-02-23)
|
우선권정보 |
DE-0012956 (2000-03-16) |
국제출원번호 |
PCT/DE01/00689
(2001-02-23)
|
국제공개번호 |
WO01/69079
(2001-09-20)
|
발명자
/ 주소 |
- Gerhardt, Juergen
- Haussmann, Martin
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
A device for regulating the energy supply for the ignition of an internal combustion engine including an ignition coil and a central control unit, the ignition coil including a primary winding and an ignition power module connected to the primary winding. The central control unit ascertains a time d
A device for regulating the energy supply for the ignition of an internal combustion engine including an ignition coil and a central control unit, the ignition coil including a primary winding and an ignition power module connected to the primary winding. The central control unit ascertains a time difference between the beginning of current flow through the primary winding and the reaching of a first threshold value of the primary current, and in the light of the time difference, the central control unit determines an additional power loss of the ignition power module and/or active energy reduction, caused by interturn short circuits in the primary winding. When the additional power loss of the ignition power module exceeds a power loss threshold value, the ignition power module is switched off.
대표청구항
▼
1. A device for regulating an energy supply for an ignition of an internal combustion engine, the device comprising:an ignition coil including a primary winding and an ignition power module connected to the primary winding; anda central control unit configured to ascertain a time difference between
1. A device for regulating an energy supply for an ignition of an internal combustion engine, the device comprising:an ignition coil including a primary winding and an ignition power module connected to the primary winding; anda central control unit configured to ascertain a time difference between a beginning of a current flow through the primary winding and a reaching of a first threshold value of a primary current, the central control unit further configured to determine a power loss of the ignition power module as a function of the time difference, the power loss being compared to a power loss threshold value, and the energy supply for the ignition being reduced when the power loss of the ignition power module exceeds the power loss threshold value. 2. The device of claim 1, wherein when the power loss threshold value is exceeded by the power loss of the ignition power module, the ignition power module is switched off by a disconnect unit connected to the ignition power module. 3. The device of claim 1, wherein the central control unit includes a regulating unit, the energy supply for the ignition being regulated by the regulating unit such that a reduction of the energy supply for the ignition is a minimum. 4. The device of claim 3, wherein a controlled variable of the energy supply for the ignition represents a dwell time. 5. The device of claim 4, wherein the ignition power module is switched off by the disconnect unit only after a certain fixed, predefined time after it has been determined that one of the power loss threshold value and the temperature threshold value has been exceeded. 6. The device of claim 3, wherein a controlled variable of the energy supply for the ignition represents a voltage. 7. The device of claim 3, wherein regulation of the energy supply for the ignition is performed in a plurality of steps by the regulating unit, and after each regulating step, an exceeding of the power loss threshold value by the power loss of the ignition power module is checked, using the central control unit. 8. The device of claim 7, wherein after each regulating step, which is connected with a decrease in the energy supply for the ignition, a fall below the power loss is checked using the central control unit. 9. The device of claim 8, wherein the central control unit includes a disconnect unit connected to the ignition power module, such that when a temperature of the ignition power module exceeds a temperature threshold value, the ignition power module is switched off. 10. The device of claim 3, wherein the ignition power module is switched off by the disconnect unit only after a certain fixed, predefined time after it has been determined that one of the power loss fthreshold value and a temperature threshold value has been exceeded. 11. The device of claim 1, wherein a power loss temperature corresponding to the power loss of the ignition power module is ascertained by the central control unit, such that a temperature of the ignition power module is ascertained as a sum of the power loss temperature and a surroundings temperature. 12. The device of claim 11, wherein the central control unit is connected to a temperature sensor, such that the surroundings temperature is ascertained. 13. The device of claim 12, wherein the surroundings temperature is available as one of a fixed, predefined value and a function of operating states in a characteristics map in a memory unit of the central control unit. 14. The device of claim 12, wherein the operating states are characterized by one of a time after a starting of the internal combustion engine and a temperature of a cooling water. 15. A method for regulating an energy supply for an ignition of an internal combustion engine including an ignition coil and a central control unit, the ignition coil including a primary winding which is connected to an ignition power module, the method comprising:determining a time difference between a beginning of a current flow through the p rimary winding and a reaching of a first threshold value of a primary current by the central control unit;determining a power loss of the ignition power module caused by a plurality of interturn short circuits in the primary winding, as a function of the time difference using the central control unit;comparing the power loss with a power loss threshold value; andreducing the energy supply for the ignition when the power loss of the ignition power module exceeds the power loss threshold value. 16. The method of claim 15, further comprising:switching off the ignition power module by a disconnect unit connected to the ignition power module, at a time when an exceeding of the power loss threshold value by the power loss of the ignition power module is determined by the central control unit. 17. The method of claim 16, wherein a power loss temperature is ascertained from the power loss of the ignition power module, and from the power loss temperature, a temperature of the ignition power module is ascertained, the temperature of the ignition power module being derived as a sum of the power loss temperature and a surroundings temperature. 18. The method of claim 17, wherein the ignition power module is switched off by a disconnect unit at a time when a temperature of the ignition power module exceeds a certain, predefinable temperature threshold value. 19. The method of claim 18, wherein the ignition power module is switched off by the disconnect unit only after a certain fixed, predefined time after it has been determined that one of the power loss threshold value and the certain, predefinable temperature threshold value has been exceeded. 20. The method of claim 17, wherein, when the temperature sensor is defective, the surroundings temperature is one of derived from a fixed, predefined value and read out from a characteristics map as a function of a plurality of operating states of the internal combustion engine. 21. The method of claim 16, wherein the ignition power module is switched off by the disconnect unit only after a certain fixed, predefined time after it has been determined that one of the power loss threshold value and a certain, predefinable temperature threshold value has been exceeded. 22. The method of claim 15, regulating the energy supply for the ignition by a regulating unit of the central control unit, such that a reduction of the energy supply for the ignition is a minimized. 23. The method of claim 22, wherein a controlled variable of the energy supply for the ignition represents a dwell time. 24. The method of claim 22, wherein a controlled variable of the energy supply for the ignition represents a voltage. 25. The method of claim 22, wherein regulation of the energy supply for the ignition is performed in a plurality of steps by the regulating unit, and after each regulating step, an exceeding of a power loss threshold value by the power loss of the ignition power module is checked using the central control unit. 26. The method of claim 25, wherein after each regulating step in which the energy supply for the ignition is reduced, a fall below the power loss is checked by the central control unit. 27. The method of claim 26, wherein the surroundings temperature is one of derived from one of a fixed, predefined value and a characteristics map as a function of a plurality of operating states of the internal combustion engine and ascertained with aid of a temperature sensor. 28. The method of claim 26, wherein an additional ohmic power loss of line resistances and winding resistances conditioned upon an increased temperature is ascertained by the central control unit in light of a temperature of the ignition power module, and is considered by a prolonging of a dwell time.
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