Apparatus and method for measuring a fluid vapour in a pumping chamber

Patent metadata

Field	Value
Publication number	US-9506441-B2
Application number	US-201414170965-A
Country	US
Kind code	B2
Filing date	Feb 3, 2014
Priority date	Sep 20, 2007
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The present invention provides, with reference to FIG. 1 , an internal combustion engine ( 10 ) having a fuel injector which comprises a sprung piston ( 55 ) or a resilient diaphragm piston ( 8155 ) and an electrical coil ( 57, 8158 ) for displacing the piston ( 55, 8155 ). The piston draws fuel into and expels fuel from a pumping chamber ( 52, 8152 ). The number of operations of the injector per engine cycle is controlled by an electronic controller ( 23, 8159 ) to control the quality of fuel delivered per cycle to a combustion chamber. A voltage measured in the coil ( 52, 8158 ) by movement of the piston under action of the spring or due to its own resilience is used to give an indication of vapor pressure of the fuel. A device akin to the injector can be used to draw fuel from a pipeline to measure the vapor pressure of the fluid.

First claim

The invention claimed is:

1. A fluid testing apparatus comprising:
a pumping chamber;
a fluid inlet via which the fluid is drawn into the pumping chamber;
a fluid outlet via which the fluid is expelled from the pumping chamber;
a first one-way valve allowing flow of fluid into the pumping chamber from the fluid inlet while preventing flow of fluid out of the pumping chamber back to the fluid inlet;
a second one-way valve allowing flow of fluid out of the pumping chamber to…

Assignees

• Bosch Gmbh Robert

Inventors

• Smither Benjamin David

Classifications

• Y02T10/36

  Cross-Sectional Technologies · mapped topic

• F02D2200/0606

  Mechanical Engineering · mapped topic

• F02D2400/06

  Mechanical Engineering · mapped topic

• F02D41/0027 Primary

  Mechanical Engineering · mapped topic

• F02M69/044

  Mechanical Engineering · mapped topic