Estimating fuel vapour pressure

Abstract

A method for estimating fuel vapour pressure includes determining (102) an amount of fuel present in a fuel tank, pumping (104) vapour mixture from the fuel tank until a predetermined gauge pressure is obtained, and measuring (108) the time necessary to reach the predetermined gauge pressure. Fuel vapour pressure is than directly quantified (108) based on the measured time and the detected fill level. Thus, an estimate of the fuel vapour pressure can be obtained without requiring information regarding fuel temperature, or addition of any dedicated sensor circuitry to a conventional on-board vapour management/leak detection system. Also disclosed is the use of this method in a leak testing procedure.

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Cited By (6)

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    EP-2993340-A1March 09, 2016Inergy Automotive Systems Research (Société Anonyme)Method and system for determining the volatility of a fuel
    GB-2354331-AMarch 21, 2001Jaguar CarsFuel system leak detection
    GB-2354331-BAugust 06, 2003Jaguar CarsFuel system leak detection
    JP-2011521170-AJuly 21, 2011ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングRobert Bosch Gmbhタンクシステム内の漏れの検出のための方法
    US-8706343-B2April 22, 2014Robert Bosch GmbhMethod for detecting leaks in a tank system
    WO-2009146757-A1December 10, 2009Robert Bosch GmbhMethod for detecting leaks in a tank system