Method for functional testing of arrangement for dynamic fuel consumption measurement

Patent metadata

Field	Value
Publication number	US-9835485-B2
Application number	US-201514613564-A
Country	US
Kind code	B2
Filing date	Feb 4, 2015
Priority date	Feb 6, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

For the functional testing of an arrangement for dynamic fuel consumption measurement, at least two reference flows are produced through successive operation, at different frequencies, of a system pump ( 6 ) provided in any case for the regulated fuel flow, and the gradient determined from the reference measured values obtained is compared with the known gradients of the characteristic curve of the system pump ( 6 ).

First claim

The invention claimed is:

1. A method for functional testing of an apparatus for measuring dynamic fuel consumption, said apparatus comprising a flow sensor for measuring dynamic fuel consumption in a line for delivering fuel to an engine, a pump in the line, and a recirculation line for diverting an entirety of fuel flow to said flow sensor, said pump having a known characteristic curve with gradients, said method comprising:
(a) diverting an entirety of fuel flow over the flow sensor and obtaining first and second reference measured values at first and second reference flow rates determined by the pump operated at different frequencies,
(b) determining a gradient from said first and second reference measured values, and
(c) comparing the gradient determined in step (b) with a corresponding gradient from the know characteristic curve of the pump as a functional test of the flow sensor.

2. The method as set forth in claim 1 , including a pressure sensor for measuring pressure in the line downstream of the pump, and measuring several pressures at several pump frequencies/reference flows for comparison to expected pump frequencies/reference flows.

3. The method as set forth in claim 2 , including a conditioning unit in the line and a temperature sensor downstream of the conditioning unit, and measuring temperatures at several pump frequencies/reference flows for comparison to a mean valve to determine correct functioning of the conditioning unit.

4. The method as set forth in claim 3 , wherein the pressure and temperature measurements are taken at the same pump frequencies/reference flows.

Assignees

• Avl List Gmbh

Inventors

• Tauch Michael
• Christian Rudolf

Classifications

• G01F9/006 Primary

  with mechanic means (G01F9/008 and G01F9/02 take precedence) · CPC title

• F02M37/0047

  Layout or arrangement of systems for feeding fuel (fuel injection apparatus characterised by their conduits and venting means F02M55/00; fuel injection apparatus having a common rail F02M63/0225; arrangement of fuel conduits of low pressure fuel injection apparatus F02M69/462) · CPC title

• G01M15/04

  Testing internal-combustion engines · CPC title

• F02D33/003 Primary

  Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus (control of electrical fuel pumps F02D41/3082, controlling fuel flow to a common rail F02D41/3845); Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge · CPC title

• G01F1/00

  Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00) · CPC title