Patent ID: 7174780
Filing Date: 2007-02-13
Classification: F02D,F02M,G01F

Abstract:
1. A liquid fuel quantity measurement system, comprising: a first container for storing liquid fuel therein; pressure application means for raising air pressure within said first container by supplying air into said first container; air-pressure measurement means for measuring the air pressure within said first container; a first pipeline through which said first container and said pressure application means communicate with each other; a second container connected with said first container; a second pipeline through which said first container and said second container communicate with each other; feed means for feeding the liquid fuel within said first container into said second container through said second pipeline; detection means for detecting a reduction in the liquid fuel within said second container; control means for controlling said feed means and said pressure application means by selecting either a pressure mode or a supply mode, based on information from both said air-pressure measurement means and said detection means; air-volume measurement means for measuring the volume of air supplied into said first container through said first pipeline by said pressure application means; and arithmetic means for calculating, during said pressure mode, the volume of the liquid fuel within said first container from both the volume of air measured by said air-volume measurement means and a quantity of change in air pressure calculated from the air pressure within said first container measured by said air-pressure measurement means, and for calculating, during said supply mode, the volume of the liquid fuel within said first container from the number of times that the liquid fuel was fed from said first container into said second container.