Test stand and method for testing fluid pumps and fluid injectors

Patent metadata

Field	Value
Publication number	US-9528768-B2
Application number	US-201113810535-A
Country	US
Kind code	B2
Filing date	Jun 6, 2011
Priority date	Jul 16, 2010
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A test stand for testing a fluid injection pump and/or a fluid injector has a device for conditioning a test fluid used for the testing. The device has a tank to accommodate and store the test fluid, a first fluid removal line to withdraw test fluid from the tank and to convey it to the fluid injection pump, and a cooling circuit for cooling the test fluid stored inside the tank. The cooling circuit has a second fluid removal line and a return line. The fluid removal line is to withdraw test fluid from the tank and is connected to a heat exchanger, which cools the test fluid withdrawn from the tank. The return line is connected to the heat exchanger and returns the test fluid from the heat exchanger back into the tank.

First claim

What is claimed is:

1. A test stand for testing at least one of a fluid injection pump and a fluid injector, the test stand having a device for conditioning a test fluid used for the testing, the device comprising:
a tank to accommodate and store the test fluid;
a first fluid removal line situated to withdraw test fluid from the tank and to convey it to the fluid injection pump;
a first cooling circuit configured to cool the test fluid stored inside the tank, the first cooling circuit having a second fluid removal line situated to withdraw test fluid from the tank, a heat exchanger configured to cool the test fluid removed from the tank and connected to the second fluid removal line, and a return line connected to the heat exchanger and situated to return the test fluid from the heat exchanger back into the tank; and
a second, closed cooling circuit connected to the heat exchanger and configured to cool the test fluid flowing through the heat exchanger during operation, wherein the second cooling circuit circulates a coolant which is separate from the test fluid.

2. The test stand as recited in claim 1 , further comprising:
a control valve provided in the second cooling circuit, the control valve to regulate a coolant flow through the cooling circuit.

3. The test stand as recited in claim 1 , wherein a coolant pump is situated in the second cooling circuit, and the coolant pump is to support a circulation of coolant through the cooling circuit.

4. The test stand as recited in claim 1 , further comprising:
a heater situated in the tank, the heater to heat the test fluid stored inside the tank.

5. The test stand as recited in claim 1 , wherein at least one temperature sensor is situated at least one of in the first fluid removal line, and inside the tank, the temperature sensor to measure a temperature of the test fluid.

6. A method for testing at least one of a fluid injection pump and a fluid injector, comprising:
conditioning a test fluid stored inside a tank;
withdrawing the conditioned test fluid from the tank to convey it to the fluid injection pump, which supplies the test fluid to the fluid injector under increased pressure;
wherein the conditioning of the test fluid includes withdrawing test fluid from the tank, conducting the withdrawn test fluid through a heat exchanger, and returning the withdrawn test fluid to the tank,
wherein a closed cooling circuit is connected to the heat exchanger and is configured to cool the test fluid flowing through the heat exchanger during operation, and
wherein the closed cooling circuit circulates a coolant which is separate from the test fluid.

7. The method as recited in claim 6 , further comprising:
heating the test fluid inside the tank.

8. The method as recited in claim 6 , further comprising: measuring a temperature of the test fluid.

9. The method as recited in claim 8 , further comprising:
regulating a cooling and heating of the test fluid on the basis of the measured temperature.

Assignees

• Schoenfeld Dirk
• Blank Kurt
• Kastner Karl
• Strack Daniel
• Bosch Gmbh Robert

Inventors

• Schoenfeld Dirk
• Blank Kurt
• Kastner Karl
• Strack Daniel

Classifications

• F02M53/00 Primary

  Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means · CPC title

• F02M65/00

  Testing fuel-injection apparatus, e.g. testing injection timing {(testing of ignition F02P17/00; measuring fuel consumption G01F9/00); Cleaning of fuel-injection apparatus} · CPC title

• F02M65/001

  Measuring fuel delivery of a fuel injector · CPC title

• F28D1/00 Primary

  Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators (F28D5/00 takes precedence) · CPC title