Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Hirokazu Yokoyama

Kazuhiro Asayama

Hiroshi Inoue

Yoshihiro Tanaka

Takashi Usui

Takeshi Kitamura

Takeyuki Yabuuchi

Shinobu Ishida

Satoki Takagi

A high-pressure fuel pump () includes a plunger (), a pump housing (), an intake valve (), a discharge passage (), a fuel seal member (), and a fuel inlet conduit (). The pump housing () includes a fuel pressurizing chamber (), an intake passage (), a discharge passage (), a cylinder housing member (), a cover member () that covers the cylinder housing member (), and an intake gallery chamber (). The fuel inlet conduit () is connected to the cover member () and configured to introduce fuel into the intake gallery chamber () from outside the cover member (). The pump housing () includes a return passage () that communicates the intake gallery chamber () with a space surrounded by the plunger (), the cylinder housing member (), and the fuel seal member (). A first end portion of the return passage () on the intake gallery chamber () side is positioned on an opposite side of the cylinder housing member () from the fuel inlet conduit ().

High-pressure fuel pump

A fuel pump includes a plunger that reciprocates in a cylinder. The fuel pump further includes a first mover connected to the plunger, a second mover serving as a counterweight for the first mover, an electromagnet provided between the first mover and the second mover, a first magnetic member provided between the first mover and the second mover, and a first spring urging the first mover and the second mover away from each other. Further, a second magnetic member is provided between both of the electromagnet and the first magnetic member and a first inclined surface of the first mover, while a third magnetic member is provided between both of the electromagnet and the first magnetic member and a second inclined surface of the second mover.

Fuel pump

In a fuel pump that includes a pump housing () that has fuel passages (), a plunger () that is movably housed in the pump housing (), a fuel pressurizing chamber () that is formed in the pump housing () and draws in fuel via one of the fuel passages () that is on the intake side of the fuel pressurizing chamber (), pressurizes the fuel that has been drawn in, and discharges the pressurized fuel via the other fuel passage () that is on the discharge side of the fuel pressure chamber (), in response to movement of the plunger (), and valve elements () that are arranged in the fuel passages () near the fuel pressurizing chamber (), each of the valve elements () has a reed valve body () arranged in the fuel passage () on the intake side of the fuel pressurizing chamber () or the fuel passage () on the discharge side of the fuel pressurizing chamber (); and an operating member () that applies operating force in at least one of a valve opening direction or a valve closing direction to the reed valve body () is provided in the pump housing ().

Fuel pump with discharge control

A high pressure pump for preventing distortion of a sealing surface or a cylinder form. The high pressure pump has an intermediate member including a cylinder body having a pressurizing chamber communicated with a cylinder accommodating a plunger. Fluid in the pressurizing chamber is pressurized by reciprocating the plunger. The intermediate member is arranged between a cover and a flange and is clamped by clamping bolts. An electromagnetic spill valve for receiving reaction force from the pressurizing chamber when the fluid in the pressurizing chamber is pressurized is attached to the cover at a position for reducing the clamping force applied to the intermediate member by the clamping bolts.

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Toyota, Japan

Hirokazu Yokoyama