High-pressure pump unit and test method therefor

Details High-pressure pump unit and test method therefor High-pressure pump unit and test method therefor

1996-07-23

1998-03-24

Dombroske, George M.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

123446, G01M 1500

Patent

active

057315159

ABSTRACT:
A high-pressure pump unit allowing an oiltight test for a high-pressure piping system after assembly without damaging parts which do not have a pressure resistance construction. The pump unit comprises a high-pressure pump (11) for sucking fuel and pressurizing it, a high-pressure regulator (14) coupled through a fuel consuming section (3, 4) to the outlet side of the high-pressure pump for regulating the pressure to the fuel discharged under a high pressure from the high-pressure pump, a fuel pressure switching valve (15) placed in a bypass extending from an upstream side of the high-pressure regulator to a downstream side thereof for opening and closing the bypass in accordance with an operational mode, a check valve (12) located between the high-pressure pump and the fuel consuming section, and a check valve (17) placed between an exit passage (18) of the high-pressure regulator and a passage (19) through which the fuel in the outside of the high-pressure section of the high-pressure pump is discharged to the outside of the high-pressure pump.

REFERENCES:
patent: 4552015 (1985-11-01), Emmett et al.
patent: 4713965 (1987-12-01), Kobayashi
patent: 5020362 (1991-06-01), Hart et al.
patent: 5284120 (1994-02-01), Fukushima et al.
patent: 5493902 (1996-02-01), Glidewell et al.
patent: 5499538 (1996-03-01), Glidewell et al.
patent: 5535621 (1996-07-01), Glidewell et al.

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