Method and device for examining and/or adjusting valves

Details Method and device for examining and/or adjusting valves Method and device for examining and/or adjusting valves

1999-03-18

2001-11-06

McCall, Eric S. (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Compression

Reexamination Certificate

active

06311553

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for setting and/or testing valves.
BACKGROUND INFORMATION
Methods for setting and/or testing valves, in particular injection valves for internal combustion engines, are known in the art. To set the dynamic flow rate of injection valves, the hydraulic flow volume is measured and set during manufacture.
When the dynamic flow rate of valves is set, a highly accurate hydraulic medium (“standard gasoline”) is applied to the valve. The actual flow rate is measured by defined activation and measurement of the flow rate, and the valve is set so that a defined flow rate is established for a defined activation.
The standard gasoline has a constant density and viscosity as well as high purity. For these reasons, this standard gasoline is very expensive. In additions evaporation of the standard gasoline results in a considerable impact on the environment and on shop personnel. The use of other media for testing is problematic, since they have hydraulic characteristics which differ from those of fuel.
SUMMARY OF THE INVENTION
An object of the present invention is to provide for a method and an apparatus for testing and/or setting a valve that decreases costs and environmental impact.
In the procedure according to the present invention, a gaseous medium is applied to the valve. In this context, a first variable characterizing the flow rate of the gaseous medium, and/or at least a second variable, are detected. This procedure can result in a considerable cost reduction and a decrease in the impact on the environment and on shop personnel.
It is particularly advantageous if the current at which the valve opens and/or the current at which the valve closes is detected as the second variable.


REFERENCES:
patent: 3704694 (1972-12-01), Heinz et al.
patent: 4254653 (1981-03-01), Casey et al.
patent: 4402294 (1983-09-01), McHugh et al.
patent: 4501140 (1985-02-01), Nakagawa et al.
patent: 4785771 (1988-11-01), Ibuki et al.
patent: 4791810 (1988-12-01), Old et al.
patent: 4798084 (1989-01-01), Takahashi et al.
patent: 4977872 (1990-12-01), Hartopp
patent: 5157967 (1992-10-01), Wieczorek
patent: 5492099 (1996-02-01), Maddock
patent: 5553490 (1996-09-01), Nicholls et al.
patent: 5641891 (1997-06-01), Frankl et al.
patent: 5650575 (1997-07-01), Heyse et al.
patent: 5708201 (1998-01-01), Kaub
patent: 5795998 (1998-08-01), Smith
patent: 6021754 (2000-02-01), Kendrick
patent: 6085142 (2000-07-01), Leo et al.
patent: 0 188 024 (1986-07-01), None
patent: 0 426 205 (1991-05-01), None

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