Measuring and testing – Internal combustion engine or related engine system or... – Compression
Patent
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.
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Geshi Kazuhiro
Maruyama Tomohide
Miyajima Masayasu
Shimaoka Kiyoshige
Tominaga Tsutomu
Dombroske George M.
McCall Eric S.
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
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