HIGH-PRESSURE FUEL PUMP
An object of the present invention is to reduce erosion due to cavitation in proximity to a valve seat in a high-pressure fuel supply pump including a fuel flow passage having a bent portion in proximity to the valve seat, formed therein. The high-pressure fuel supply pump includes fuel passages 10S...
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Main Authors | , , , , , |
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Format | Patent |
Language | English French German |
Published |
07.06.2017
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Subjects | |
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Abstract | An object of the present invention is to reduce erosion due to cavitation in proximity to a valve seat in a high-pressure fuel supply pump including a fuel flow passage having a bent portion in proximity to the valve seat, formed therein. The high-pressure fuel supply pump includes fuel passages 10S and 10P interconnecting with a pressurizing chamber of fuel in which volume varies due to reciprocating motion of a plunger to be in the reciprocation motion, and fluid valves 203 and 214S formed on the fuel passage. The fuel valves are included in a valve seat 214S and a valve member 203. The fuel passages include a gap passage portion 10S formed in a gap between the valve seat and the valve member, and a bent passage portion 10P extending in a bent direction on the downstream side of the gap passage portion. In a case where a backflow direction of the fuel is defined as a reference, in terms of a passage surface on the side of an inner circumference of a bent passage portion including the gap passage portion and the bent passage portion, a recess portion 214A is formed on an end portion on the upstream side of a passage surface 214D included in the side of the bent passage portion. |
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AbstractList | An object of the present invention is to reduce erosion due to cavitation in proximity to a valve seat in a high-pressure fuel supply pump including a fuel flow passage having a bent portion in proximity to the valve seat, formed therein. The high-pressure fuel supply pump includes fuel passages 10S and 10P interconnecting with a pressurizing chamber of fuel in which volume varies due to reciprocating motion of a plunger to be in the reciprocation motion, and fluid valves 203 and 214S formed on the fuel passage. The fuel valves are included in a valve seat 214S and a valve member 203. The fuel passages include a gap passage portion 10S formed in a gap between the valve seat and the valve member, and a bent passage portion 10P extending in a bent direction on the downstream side of the gap passage portion. In a case where a backflow direction of the fuel is defined as a reference, in terms of a passage surface on the side of an inner circumference of a bent passage portion including the gap passage portion and the bent passage portion, a recess portion 214A is formed on an end portion on the upstream side of a passage surface 214D included in the side of the bent passage portion. |
Author | USUI, Satoshi ARITOMI, Shunsuke KAWANO, Tatsuo SUGANAMI, Masayuki SAITO, Atsuji TOKUO, Kenichirou |
Author_xml | – fullname: TOKUO, Kenichirou – fullname: ARITOMI, Shunsuke – fullname: USUI, Satoshi – fullname: SAITO, Atsuji – fullname: SUGANAMI, Masayuki – fullname: KAWANO, Tatsuo |
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DocumentTitleAlternate | HOCHDRUCKBRENNSTOFFPUMPE POMPE À COMBUSTIBLE HAUTE-PRESSION |
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Notes | Application Number: EP20140858910 |
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RelatedCompanies | Hitachi Automotive Systems, Ltd |
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Snippet | An object of the present invention is to reduce erosion due to cavitation in proximity to a valve seat in a high-pressure fuel supply pump including a fuel... |
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SourceType | Open Access Repository |
SubjectTerms | BLASTING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS |
Title | HIGH-PRESSURE FUEL PUMP |
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