Test station for fluid pumps and fluid injectors

Patent metadata

Field	Value
Publication number	US-9557245-B2
Application number	US-201113810138-A
Country	US
Kind code	B2
Filing date	Jun 6, 2011
Priority date	Jul 16, 2010
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A test station for testing a fluid pump and/or a fluid injector has a fluid-pump receiving device for accommodating a fluid pump, a fluid-injector receiving device for accommodating a fluid injector, a fluid line which hydraulically connects the fluid-pump receiving device to the fluid-injector receiving device and which enables a fluid flow from the fluid pump to the fluid injector during operation, a sealed cooling circuit through which coolant is circulating during operation, and a first heat exchanger, which is developed and disposed in the fluid line so as to have the fluid flow and the coolant flow pass through it during operation such that a heat transfer takes place between the fluid flow and the coolant flow.

First claim

What is claimed is:

1. A test station for testing at least one of a fluid pump and a fluid injector, comprising:
a fluid pump receiving device which is configured to receive and accommodate a fluid pump to be tested;
a fluid injector receiving device which is configured to receive and accommodate a fluid injector to be tested;
a fluid line, which hydraulically connects the fluid pump receiving device to the fluid injector receiving device and enables a flow of fluid from the fluid pump to the fluid injector during operation;
a closed cooling circuit, through which a flow of coolant is circulating during operation; and
a first heat exchanger, which is configured and disposed in the fluid line downstream of the fluid pump and upstream of the fluid injector such that, before passing through the fluid injector, the fluid flow from the fluid pump and the coolant flow pass through the first heat exchanger during operation such that a heat transfer takes place between the fluid and the coolant.

2. The test station according to claim 1 , further comprising:
a second heat exchanger provided in the cooling circuit to dissipate heat from the coolant.

3. The test station according to claim 1 , wherein the coolant is liquid and contains water.

4. The test station according to claim 3 , wherein the cooling circuit is equipped with a cold-water substitute.

5. The test station according to claim 1 , further comprising:
at least one fluid-temperature sensor configured to measure a temperature of the fluid.

6. The test station according to claim 5 , wherein the at least one fluid-temperature sensor is disposed at least one of upstream and downstream from the first heat exchanger.

7. The test station according to claim 1 , further comprising:
at least one coolant-temperature sensor configured to measure a temperature of the coolant in the cooling circuit.

8. The test station according to claim 1 , further comprising:
a coolant valve, which is disposed in the cooling circuit and configured to regulate the coolant flow in the cooling circuit.

9. The test station according to claim 8 , further comprising:
a controller, which is connected to the coolant valve and configured to regulate the coolant flow in the cooling circuit by controlling the coolant valve.

10. The test station according to claim 1 , further comprising:
a second heat exchanger which is disposed in the cooling circuit, wherein a controller, which is connected to a coolant valve, also acts on the second heat exchanger to regulate the temperature of the coolant in the cooling circuit; and
a ventilator to generate an air flow through the second heat exchanger, wherein the ventilator is controlled so as to control the air flow through the second heat exchanger.

11. The test station according to claim 10 , wherein the ventilator includes adjustable flaps, which are trigger-able by a controller to regulate the air flow through the second heat exchanger, so that a range within which the temperature of the injection fluid is adjustable is expanded.

12. The test station according to claim 1 , wherein when, in a test operation, the fluid pump is situated in the fluid pump receiving device and the fluid injector is situated in the fluid injector receiving device, and wherein to test the fluid pump and/or the fluid injector, the fluid pump is controlled to supply injection fluid from a fluid supply line into a pressure reservoir under increased pressure.

13. The test station according to claim 1 , wherein a fluid pressure in a pressure reservoir is measurable by at least one pressure sensor disposed inside the pressure reservoir, and is adjustable to a desired value by triggering a pressure-adjustment valve, by which excess fluid from the pressure reservoir is returnable into a tank.

14. The test station according to claim 1 , wherein a pressure reservoir is hydraulically connected via the fluid line to the fluid injector to be tested to supply pressurized fluid to the fluid injector during the test operation.

15. The test station according to claim 1 , wherein a pressure reservoir is hydraulically connected to a fluid-measuring unit via a bypass line, which closable with a bypass valve, which is closed when the fluid injector is tested.

16. The test station according to claim 1 , wherein to test the fluid pump, a bypass valve is opened and the fluid injector is not triggered, so that a fluid-measuring unit measures the fluid quantity supplied by the fluid pump.

17. The test station according to claim 1 , wherein during operation the coolant flowing through the cooling circuit absorbs heat from the injection fluid that flows through the fluid line, and a temperature of the injection fluid in the fluid line is reduced.

18. The test station according to claim 1 , wherein the coolant in the cooling circuit flows through a second heat exchanger, which is disposed in the cooling circuit, where it gives off absorbed heat.

19. The test station according to claim 1 , wherein the cooling circuit includes a coolant pump to facilitate passage of the coolant through the cooling circuit.

20. The test station according to claim 1 , wherein the cooling circuit is sealed, so that no coolant is used up during the test operation.

21. The test station according to claim 1 , wherein the cooling circuit includes a coolant-temperature sensor and a coolant valve to measure the temperature of the coolant within the cooling circuit or to regulate the coolant flow through the cooling circuit.

22. The test station according to claim 1 , wherein a coolant-temperature sensor, a coolant valve, and at least one of fluid-temperature sensors are electrically connected to a controller, which controls at least the coolant valve as a function of temperatures measured by temperature sensors and a predefined target temperature, which the injection fluid is to have when entering the fluid injector.

23. The test station according to claim 1 , wherein the temperature of the injection fluid in the fluid line is adjustable to a value desired for a particular testing operation, by controlling at least a coolant valve, wherein a constant temperature of the injection fluid is adjustable by controlling the coolant valve and/or a coolant pump.

24. A test station to test at least one of a fluid pump and a fluid injector, comprising:
a fluid pump receiving device to receive a fluid pump to be tested;
a fluid injector receiving device to receive a fluid injector to be tested, wherein the fluid pump receiving device and the fluid injector receiving device are configured so that the fluid pump to be tested and/or the fluid injector to be tested are hydraulically connected to one another by a pressure reservoir and a fluid line;
a collection device, wherein the fluid output by the fluid injector is caught by the collection device and returned to the tank via a return line, in which a fluid-measuring unit is disposed, the fluid measuring unit being configured to measure the fluid quantity flowing through the return line;
an evaluation and display unit, connected to the fluid-measuring unit, to analyze and at least one of display a measured fluid quantity measured by the fluid-measuring unit and transmit the measured fluid quantity to a diagnostic unit;
a first heat exchanger situated in the fluid line between the fluid pump and the fluid injector, such that the injection fluid in the fluid line flows through it;
a cooling circuit having a sec

Assignees

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

Inventors

• Schoenfeld Dirk
• Kastner Karl
• Blank Kurt

Classifications

• G01M15/02 Primary

  Details or accessories of testing apparatus · CPC title

• F04B51/00

  Testing machines, pumps, or pumping installations · CPC title

• F02M65/00 Primary

  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