|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F16K-037/00 F02M-025/08 F02D-041/00|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 1 인용 특허 : 19|
Methods and systems are provided for adjusting and diagnosing a position of a fuel tank isolation valve (FTIV) of a fuel system. In one example, a method comprises adjusting a FTIV of a fuel system by sending an electrical pulse to the FTIV; and comparing a current draw of the FTIV to a known current draw profile to verify the position of the FTIV. In this way, the position of the FTIV may be diagnosed, thereby resulting in increased accuracy of subsequent valve control.
1. A method, comprising: adjusting a fuel tank isolation valve (FTIV) of a fuel system by sending electrical pulses to the FTIV;counting each of the electrical pulses to track a position of the FTIV; andusing a canister temperature to verify the position of the FTIV when the position of the FTIV is unknown or invalid. 2. The method of claim 1, wherein using the canister temperature to verify the position of the FTIV comprises indicating the FTIV is open responsive to the canister temperature increasing above a threshold within a duration and indicating t...