Oki Electric Industry Co., Ltd.

Hitachi, Ltd.

Mitsubishi Electric Corporation

Hitachi Car Engineering Co., Ltd.

Hitachi Automotive Systems, Ltd.

Other

Nissan Motor Company Limited

Yamanouchi Pharmaceutical Company Ltd.

Masami Abe

Hiroyuki Yamada

Koichiro Kamei

Kazuhiro Odahara

Satoshi Usui

Atsuji Saito

Daisuke Mizuno

Toru Onose

Hiroshi Odakura

Kenichiro Tokuo

Naohito Kaneda

Yukio Takahashi

Hiroaki Kitano

Masayoshi Kotaki

Jun Iwata

Shigenori Tahara

Haruhiko Shimoji

Masahiko Kurishige

Kiyotaka Ogura

Masahiro Iezawa

Minoru Hashida

Junichi Shimada

Toshio Kato

Hideki Machimura

Akihiko Imagi

Shunsuke Aritomi

Haruhiro Shiino

Norio Yamaguchi

Hideaki Ishii

Kazumoto Sano

Yasuo Shoji

Hiroshi Shigeta

Hideo Eiki

Ryoichi Yagi

Yuhei Tsukahara

Ryozo Ikeuchi

Naoki Shirakawa

Masayuki Yoshimoto

Ryo Sekiya

Tohru Himoto

Usui Satoshi

Toru Hitachi Ltd Intellectual Prop Group Onose

Hiroyuki Hitachi Ltd Intellectual Prop Group Yamada

Masayoshi Hitachi Ltd Intellectual Prop Group Kotaki

Satoshi Hitachi Ltd Intellectual Prop Group Usui

Hiroshi Hitachi Ltd Intellectual Prop Group Odakura

Atsuji Hitachi Ltd Intellectual Prop Group Saito

A high-pressure fuel pump includes a pressurizing chamber for pressurizing fuel, an outlet valve for discharging the fuel pressurized in the pressurizing chamber to an outlet passage, a relief passage for connecting the outlet passage located downstream of the outlet valve and the pressurizing chamber with each other while bypassing the outlet valve. A relief valve device is provided in the relief passage and adapted to open when an internal pressure of the outlet passage becomes higher than that of the pressurizing chamber, thereby providing communication between the outlet passage and the pressurizing chamber. The relief valve includes a relief spring mechanism for pressing a relief valve to a relief valve seat. At least the relief spring mechanism among members of the relief valve device is provided outside the pressurizing chamber in the pump body.

High-pressure fuel pump

Since a pinion gear unit which rotates according to the rotation of an output rotation shaft driven by the motor unit, a pushing mechanism which moves the pinion gear unit towards an engagement location of the pinion gear and an engine starting gear, and a bracket which includes a bracket main body unit which supports the motor unit and the pushing mechanism and a nose unit which extends from the bracket main body unit to a side opposite to the motor unit and rotatably bears a tip portion of the output rotation shaft on a side opposite to the motor unit, and which is attached to an engine side are included, a first stopper unit which restricts the movement of the rotation member to the direction of the engine starting gear is provided on the output rotation shaft, a second stopper unit which restricts the movement of the pinion gears to the direction of the engine starting gear by pushing and biasing of the elastic member is provided on the rotation member, and positioning the first stopper unit is positioned on a side opposite to the engine starting gear with respect to the second stopper unit, it is possible to shorten the shaft length of the rotation member and to shorten the entire length of the engine starting device.

Engine starting device

An engine startup device is provided having a helical-spline-engaging part where an output shaft () and a moving body () are coupled with each other, wherein a notch () is formed on a power-transmitting-side tooth surface () of at least either one of the output shaft and the moving body, and an angle formed by the notch with respect to a shaft direction is made smaller than the lead angle of a helical spline.

Engine startup device

In an electric motor-driven booster, a sharp change of reaction force to an operation of a brake pedal is reduced to improve the brake pedal operation feeling. Operation of the brake pedal causes an input rod () and an input piston () to advance, and an electric motor () is driven according to the movement of the input piston to propel a primary piston () through a ball-screw mechanism, thereby generating a desired brake hydraulic pressure in a master cylinder. At this time, the input piston receives the hydraulic pressure in the master cylinder to feed back a part of reaction force during braking to the brake pedal. When the brake pedal is further depressed after the output of the electric motor has reached a maximum output and the primary pistonhas stopped, a lock nut abuts against a movable spring retainer and compresses a reaction force spring.

Electric motor-driven booster

It is possible to obtain an engine starting device in which, at the time of initial engagement of a first pinion gear and an engine starting gear, in a case where the first pinion gear collides with the engine starting gear, the first pinion gear is inclined with respect to the second pinion gear, a void having a predetermined size for expanding the inclined state is formed between a surface of an end surface portion of the first pinion gear on the side of an end surface portion of the second pinion gear, and a surface of an end surface portion of the second pinion gear on the side of the end surface portion of the first pinion gear, even in a case where any one of the rotation speed of the engine starting gear and the rotation speed of the pinion gear is larger than the other, rotation synchronization of the engine starting gear and the pinion gear and phase focusing of the teeth between the engine starting gear and the pinion gear is further rapidly and further reliably performed at the time when the engine starting gear and the pinion gear is abutted to each other, noise is decreased, and shortening of the life due to abrasion can be suppressed.

The engine starting device includes a pinion unit which is spline-coupled to an output shaft side of a starter motor to slide in an axial direction, the pinion unit including a one-way clutch which spins for rotation in the same direction as that of rotation of the engine, and a pushing mechanism for moving the pinion unit to a position in which the pinion unit comes into meshing engagement with a ring gear. A pinion gear of the pinion unit is movable in the axial direction as a single body, and includes a chamfered portion having a curved surface along a tooth surface on a non-torque transmitting surface side and a large length in the axial direction, the chamfered portion being provided to a ring-gear side distal end portion of the tooth surface on the non-torque transmitting surface side.

The engine starting device includes a starter motor, a pinion portion, a pushing mechanism for pushing a pinion gear of the pinion portion to a position at which the pinion gear comes into meshing engagement with a ring gear, and an integrated switch for operating a motor-energization switch to pull a plunger after the pinion gear is pushed, by configuring a switch for actuating the pushing mechanism and turning ON/OFF an energization current to the starter motor by a single plunger coil. When a restart request is issued after an engine stop is requested and therefore the integrated switch is placed in an ON state, operation timing of the pushing mechanism and coil-operation timing of the plunger coil are set so that the starter motor avoids operating until the pinion gear comes into contact or meshing engagement with the ring gear.

The engine starter includes: a starter motor; a pinion unit () for sliding in an axial direction on an output shaft of the starter motor; and a ring gear () which meshes with a pinion pushed out by a push-out mechanism () and receives a transmission of a rotational force of the starter motor to thereby start an engine, and the pinion portion () includes a pinion gear divided in the axial direction into two pinion gears which are a first pinion gear () having a protruded shape for synchronization, for first colliding with the ring gear upon start of meshing with the ring gear, and a second pinion gear () for serving to transmit the rotational force after the meshing.

Engine starter

A pinion gear unit includes a rotation member rotating according to the rotation of a output shaft. A first pinion gear fit to the rotation member through a first serration unit rotates with, and also moves with the rotation member if the pinion gear unit moves towards an engagement location with an engine starting gear. A second pinion gear is fit to the rotation member adjacent to the first pinion gear through a second serration unit, rotates with and moves with the rotation member if the pinion gear unit further moves towards the engagement location, and engages with the starting gear later than the first pinion gear, where the first pinion gear engages with the engine starting gear. Fitting is performed by the first and second serration units so that phases of teeth of the first and second pinion gears in a circumferential direction correspond with each other.

Engine starting device, including: a crank signal generation unit (); and an engine control unit () for identifying a predetermined crank position of a crankshaft, and starting the engine, in which the engine control unit estimates, in a course of stopping the engine when a stop condition for the engine is established, based on an engine rpm at the identified predetermined crank position, whether or not the engine rotates backward before reaching the predetermined crank position for a next time, and after estimating that the engine rotates backward, sets an inhibition range which is prescribed from a starter drive inhibition start timing to a starter drive inhibition reset timing, and a permission range which is other than the inhibition range, and when the restart condition is established during rotation of the engine, inhibits restart in the inhibition range and carries out the restart in the permission range.

Engine starting device and engine starting method

Provided is an engine starter wherein a torsional angle &#x3b8;of a helical splineof an output shaftis set in such a way that a reactive force Fpof a plunger spring, which is operated to a clutch, is larger than a propulsive force F, which is operated so as to urge the clutchby a rotational force of the motorin a shaft direction along a helical splineof an output shaft, before a pinion engaging solenoidis operated. Thereby, it can be prevented that the clutchis urged in the shaft direction, so that it can be prevented without upsizing the engine starter that the pinionis protruded in the shaft direction.

A high-pressure fuel supply pump includes a discharge valve, which is a non-return valve between a pressurizing chamber and a discharge port. The discharge valve includes a valve body housing, a discharge valve spring, a valve body and a seat member. The discharge valve is a flat valve. When the valve is opened, a flow of fuel moving from the pressurizing chamber and axially colliding with the valve body is radially distributed in the radial direction of the valve body to become a flow directly moving the discharge ports and a flow colliding with an inner wall of the valve body housing before moving toward the discharge ports and then in a circumferential direction of the valve body.

High-pressure fuel supply pump and discharge valve unit used therein

A high-pressure fuel pump is comprises of: a plunger which slidably fits to a cylinder and reciprocates for pressurizing and discharging a fuel taken in a pressurizing chamber; an inlet valve device for taking in a fuel into the pressurizing chamber; an outlet valve device for discharging the pressurized fuel from the pressurizing chamber; and a communicating pass which comprises a hole or a groove formed in the cylinder, and communicates between a pressurized fuel area and a gap between the cylinder and the plunger.

Growing community of inventors

Hitachi, Japan

Masami Abe