HIGH-PRESSURE PUMP FOR MOTOR VEHICLE INTERNAL COMBUSTION ENGINE

The invention relates to a high-pressure pump for a liquid fuel direct injection system for a motor vehicle, said high-pressure pump comprising a pump body comprising a low-pressure liquid fuel inlet, a high-pressure liquid fuel outlet and a compression chamber provided with a plunger that can trans...

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Bibliographic Details
Main Author PAILLARD, Jerome
Format Patent
LanguageEnglish
French
Published 04.05.2023
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Summary:The invention relates to a high-pressure pump for a liquid fuel direct injection system for a motor vehicle, said high-pressure pump comprising a pump body comprising a low-pressure liquid fuel inlet, a high-pressure liquid fuel outlet and a compression chamber provided with a plunger that can translate inside the pump body, said compression chamber connecting the low-pressure liquid fuel inlet to the high-pressure liquid fuel outlet, characterised in that the high-pressure pump comprises at least one intermediate piston which delimits, with the plunger, a variable-volume intermediate chamber. Pompe à haute pression pour système d'injection directe de carburant liquide pour véhicule automobile, ladite pompe haute pression comprenant un corps de pompe comprenant une entrée de carburant liquide à basse pression, une sortie de carburant liquide à haute pression et une chambre de compression munie d'un plongeur mobile en translation dans le corps de pompe, ladite chambre de compression reliant l'entrée de carburant liquide à basse pression à la sortie de carburant liquide à haute pression, caractérisé en ce que la pompe à haute pression comprend au moins un piston intermédiaire délimitant avec le plongeur une chambre intermédiaire de volume variable.
Bibliography:Application Number: WO2022EP79161