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특허 상세정보

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내보내기 페이스북 공유 카카오톡 공유

Temperature correction method and subsystem for automotive evaporative leak detection systems

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01M-019/00   
미국특허분류(USC) 073/040.5; 073/118.1
출원번호 US-0876683 (2004-06-28)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 6  인용 특허 : 82
초록

A method and sensor or sensor subsystem permit improved evaporative leak detection in an automotive fuel system. The sensor or sensor subsystem computes temperature-compensated pressure values, thereby eliminating or reducing false positive or other adverse results triggered by temperature changes in the fuel tank. The temperature-compensated pressure measurement is then available for drawing an inference regarding the existence of a leak with reduced or eliminated false detection arising as a result of temperature fluctuations.

대표
청구항
▼

What is claimed is: 1. A method of diagnosing an evaporative emission control system to determine if a leak is present in the system, the method comprising: sealing the system from external influences; monitoring a pressure level with in the system over a cooling period, the monitoring including: providing a temperature-compensated pressure sensor having a pressure sensing element and a temperature sensing element, coupling a processor to the pressure sensing element and to the temperature sensing element, and receiving, respectively, pressure and tempe...

이 특허에 인용된 특허 (82)

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이 특허를 인용한 특허 피인용횟수: 6

  1. Pursifull, Ross Dykstra. Airflow generating device for alternator cooling and vapor canister purging. USP2013118590514.
  2. Matsunaga, Hideo; Kamura, Hitoshi; Kinoshita, Noriaki; Ikedaya, Hisakazu. Evaporative emission control device for an internal combustion engine. USP2015109151251.
  3. Grunwald, Oliver. Method and device for testing the tightness of a fuel tank of an internal combustion engine. USP2013028365706.
  4. Verrier,Cyrille; Leberon,Regis. System and method for detecting a rapid leak from a tire. USP2008107432801.
  5. Dudar, Aed M.. Systems and methods for evaporative emissions testing. USP2017099759166.
  6. Rain, Mark A.. Valves including multiple seats and related assemblies and methods. USP20181110125874.

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