Fuel injector heater element control via single data line
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-053/02
F02M-053/06
F02G-005/00
출원번호
US-0106220
(2011-05-12)
등록번호
US-8731801
(2014-05-20)
발명자
/ 주소
Mowery, Kenneth D.
출원인 / 주소
Delphi Technologies, Inc.
대리인 / 주소
Hazelton, Lawrence D.
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A system, heated fuel injector, and controller for closed-loop temperature control of a heated fuel injector having simultaneous two-way data communication over a single-line data connection. The system includes a voltage source to output a heater enable signal and a variable current sink configured
A system, heated fuel injector, and controller for closed-loop temperature control of a heated fuel injector having simultaneous two-way data communication over a single-line data connection. The system includes a voltage source to output a heater enable signal and a variable current sink configured to draw a current value indicative of a temperature value related to the heated fuel injector. The heater signal and the current value are simultaneously present on the single-line data connection. The configuration reduces the effect of ground shift on the accuracy of determining a feedback signal from the heated fuel injector. The feedback signal is a temperature value related to the heated fuel injector and is indicated by a current value. Because the feedback signal is a current value, the feedback signal is generally immune from being influenced by ground shift between the controller and the heated fuel injector.
대표청구항▼
1. A system for closed-loop temperature control of a heater element thermally coupled to a heated fuel injector, said system having two-way data communication via a single-line data connection, said system comprising: a voltage source configured to output a heater enable signal on the single-line da
1. A system for closed-loop temperature control of a heater element thermally coupled to a heated fuel injector, said system having two-way data communication via a single-line data connection, said system comprising: a voltage source configured to output a heater enable signal on the single-line data connection, wherein said heater enable signal has a voltage value indicative of a heater enable state; anda variable current sink configured to draw a current value from the single-line data connection, wherein said current value is indicative of a temperature value related to the heated fuel injector,wherein the indications of the heater enable state and the temperature value are simultaneously present on the single-line data connection. 2. The system in accordance with claim 1, wherein said voltage source is a weak voltage source such that the voltage value is influenced by the current value. 3. The system in accordance with claim 2, wherein the weak voltage source comprises a series resistor. 4. The system in accordance with claim 1, wherein said system further comprises a voltage detector configured to detect the voltage value. 5. The system in accordance with claim 1, wherein said system further comprises a current detector configured to detect the current value. 6. The system in accordance with claim 1, wherein said system further comprises a voltage detector configured to detect the voltage value; and a current detector configured to detect the current value. 7. The system in accordance with claim 1, wherein said system further comprises a temperature limit control circuit configured to override the heater enable signal if the temperature value is greater than a temperature maximum. 8. The system in accordance with claim 7, wherein said temperature limit control circuit is further configured to stop overriding the heater enable signal if the temperature value becomes less than a temperature minimum. 9. A heated fuel injector configured for closed-loop temperature control of a heater element thermally coupled to the heated fuel injector, said heated fuel injector having two-way data communication via a single-line data connection, said heated fuel injector comprising: a voltage detector configured to detect a voltage value on the single-line data connection; anda variable current sink configured to draw a current value from the single-line data connection, wherein said current value is indicative of a temperature value related to the heated fuel injector,wherein the indications of the heater enable state and the temperature value are simultaneously present on the single-line data connection. 10. The heated fuel injector in accordance with claim 9, wherein said heated fuel injector further comprises a temperature limit control circuit configured to override the heater enable signal if the temperature value is greater than a temperature maximum. 11. The heated fuel injector in accordance with claim 10, wherein said temperature limit control circuit is further configured to stop overriding the heater enable signal if the temperature value becomes less than a temperature minimum. 12. A heated fuel injector controller for closed-loop temperature control of a heater element thermally coupled to a heated fuel injector, said heated fuel injector controller having two-way data communication via a single-line data connection, said heated fuel injector controller comprising: a voltage source configured to output a heater enable signal on the single-line data connection, wherein said heater enable signal has a voltage value indicative of a heater enable state; anda current detector configured to detect a current value on the single-line data connection, wherein said current value is indicative of a temperature value,wherein the indications of the heater enable state and the temperature value are simultaneously present on the single-line data connection. 13. The system in accordance with claim 12, wherein said voltage source is a weak voltage source such that the voltage value arising from the heater enable signal is dependent on a source current output by the weak voltage source. 14. The system in accordance with claim 13, wherein said weak voltage source comprises a voltage source and a series resistor.
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이 특허에 인용된 특허 (7)
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