公开(公告)号：US20210348577A1

公开(公告)日：2021-11-11

申请号：US17382655

申请日：2021-07-22

Applicant: DENSO CORPORATION

Inventor： Yuusuke ANDOU ,  Hisatoshi SHIBUYA ,  Satoshi MASUDA

IPC: F02D41/38 ,  F02D41/22 ,  F02D41/30

Abstract: A control device is included in a fuel injection system. The fuel injection system includes a low pressure pump, a high pressure pump, an accumulator, a fuel injection valve, a relief valve, and a return pipe. The high pressure pump increases a pressure of a fuel discharged from the low pressure pump and discharges high pressure fuel. The accumulator stores the high pressure fuel discharged from the high pressure pump. The relief valve is provided in a high pressure portion provided downstream from the high pressure pump and opens when a high pressure abnormality occurs in the high pressure portion. The return pipe returns the high pressure fuel in the high pressure portion to a low pressure portion provided downstream from the low pressure pump by the relief valve opening.

公开(公告)号：US20150260182A1

公开(公告)日：2015-09-17

申请号：US14729082

申请日：2015-06-03

Applicant: DENSO CORPORATION

Inventor： Masayuki KOBAYASHI ,  Eiji ITO ,  Yoshitomo OGUMA ,  Yuusuke ANDOU

IPC: F04B53/00 ,  F04B7/00 ,  F02M59/02 ,  F04B53/10 ,  F04B53/16 ,  F04B43/02 ,  F04B53/14

CPC classification number: F04B53/001 ,  F02M59/02 ,  F04B7/0015 ,  F04B11/0008 ,  F04B43/02 ,  F16L55/0338 ,  F16L55/04

Abstract: A high-pressure pump has an elastic member arranged in a damper chamber between a first diaphragm and a second diaphragm. The elastic member is always in contact with both diaphragms while the high-pressure pump is operated. When the diaphragms are further vibrated due to a resonance under a situation where a frequency of the pressure pulsation of low-pressure fuel is in agreement with the characteristic frequency of the diaphragms, the elastic member restricts the deformation of the diaphragms. Therefore, the resonance of the first diaphragm and the second diaphragm can be restricted.

Abstract translation: 高压泵具有在第一隔膜和第二隔膜之间的阻尼室中布置的弹性构件。 当高压泵运转时，弹性部件总是与两个膜片接触。 当在低压燃料的压力脉动的频率与隔膜的特征频率一致的情况下由于共振而使隔膜进一步振动时，弹性构件限制隔膜的变形。 因此，可以限制第一膜片和第二膜片的共振。