Claims
- 1. A method for an electronically controlled throttle including first and second position sensors, the second position sensor having a first characteristic in a first operating range and a second characteristic in a second operating range, comprising:reading a first output of the first sensor; reading a second output of the second sensor; and learning a transition region between the first operating range and the second operating range based on said first output and said second output.
- 2. The method recited in claim 1 wherein the characteristic is a sensor slope between output voltage and angular position.
- 3. The method recited in claim 1 further comprising determining whether the throttle is operating in the first operating range based on said learned transition region.
- 4. The method recited in claim 1 further comprising determining whether the throttle is operating in the second operating range based on said learned transition region.
- 5. The method recited in claim 3 further comprising calculating a measured throttle position from said second sensor based on a first characteristic in response to said determination.
- 6. The method recited in claim 4 further comprising calculating a measured throttle position from said second sensor based on a second characteristic in response to said determination.
- 7. The method recited in claim 1 further comprising:determining whether the throttle is operating in the first operating range based on said learned transition region; determining whether the throttle is operating in the second operating range based on said learned transition region; calculating a measured throttle position from said second sensor based on a first characteristic when operating in the first operating range; calculating said measured throttle position from said second sensor based on a second characteristic when operating in the second operating range; and controlling the throttle based on said measured throttle position.
- 8. The method recited in claim 1 wherein said step of learning said transition region further comprises the steps of:learning an offset of said second sensor in the second operating region; and calculating said transition region based on said learned offset.
- 9. The method recited in claim 8 wherein said learning further comprises learning said offset of said second sensor in the second operating region based on the first sensor output.
- 10. The method recited in claim 1 wherein said step of learning said transition region further comprises the steps of:learning a first slope and a first offset of said second sensor in the first operating region based on the first sensor output; learning a second slope and a second offset of said second sensor in the second operating region based on the first sensor; and calculating said transition region based on said learned first slope, said learned first offset, said learned second slope, and said learned second offset.
- 11. The method recited in claim 1 wherein said transition region is a transition point.
- 12. A method for an electronically controlled throttle including first and second position sensors, the second position sensor having a first characteristic in a first operating range and a second characteristic in a second operating range, comprising:reading a first output of the first sensor; reading a second output of the second sensor, wherein the second position sensor has a substrate and a track on said substrate, wherein said track has a first resistivity in the first operating range and a second resitivity in the second operating range to produce said second output; learning a transition region between the first operating range and the second operating range based on said first output and said second output.
- 13. The method recited in claim 12 wherein said transition region is where resistivity of said second sensor changes.
- 14. The method recited in claim 13 wherein said step of learning said transition region further comprises the steps of:learning a second offset of said second sensor in the second operating region based on the first sensor; and calculating said transition region based on a first slope of said second sensor in the first operating region, a second slope of said second sensor in the second operating region, a first offset of said second sensor in the first operating region, and said learned second offset.
- 15. The method recited in claim 13 wherein said step of learning said transition region further comprises the steps of:learning a second offset of said second sensor in the second operating region based on the first sensor; and calculating said transition region based on said learned second offset.
- 16. The method recited in claim 12 further comprising:determining whether the throttle is operating in the first operating range based on said learned transition region; determining whether the throttle is operating in the second operating range based on said learned transition region; calculating a measured throttle position from said second sensor based on a first characteristic when operating in the first operating range; calculating said measured throttle position from said second sensor based on a second characteristic when operating in the second operating range; and controlling the throttle based on said measured throttle position.
- 17. A method for an electronically controlled throttle including first and second position sensors, the second position sensor having a first characteristic in a first operating range and a second characteristic in a second operating range, comprising:reading a first output of the first sensor; reading a second output of the second sensor; learning said second characteristic of the second position sensor based on said first output and said second output.
- 18. The method recited in claim 17 wherein said second characteristic is a linear relationship between position and voltage, wherein said learning further comprises learning an offset of said linear relationship.
Parent Case Info
This application claims the benefit of U.S. Provisional Application No. 60/184,946 filed Feb. 25, 2000 titled “ELECTRONIC THROTTLE SYSTEM”.
US Referenced Citations (10)
Provisional Applications (1)
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Number |
Date |
Country |
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60/184946 |
Feb 2000 |
US |