Hitachi Astemo Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Yoshinori Kawai

Kan Kobayashi

Tsutomu Ito

Masaki Koyama

Takahiro Suzuki

Shuhei Nagata

Wataru Hatsuse

Hiroshi Sakai

Kaito Hotta

Shinji Seto

Takashi Ogawa

Yoshihiro Iwama

Tadahiko Chida

Yosuke Tanabe

Naofumi Harada

Hiroshi Chikuma

Aya Mizukoshi

Tomoyuki Ri

Naoyuki Oohata

A highly reliable and highly efficient air suspension system for a vehicle is provided by improving the trackability of stroke control with respect to pressure fluctuations applied to a linear compressor, suppressing stroke increase due to pressure drop, preventing piston collision, and increasing a flow rate by reducing dead volume. To realize this, the air suspension system includes an air suspension that supplies and discharges compressed air to adjust a length, a compressor body in which a piston reciprocates in a cylinder to compress air, a linear motor that reciprocates the piston, a tank that is connected to the air suspension or the compressor body and stores compressed air, a solenoid valve that opens and closes the air suspension or the tank, and an inverter that changes power supplied to the linear motor according to an open and closed state of the solenoid valve to perform position control of the piston.

Air suspension system and camera cleaning system

An air suspension apparatus includes a compressor configured to compress air, a tank configured to store the air, a tank-side suction conduit configured to supply the compressed air in this tank to an intake side of the compressor, a tank conduit connecting a discharge side of the compressor and the tank, an air suspension connected to the discharge side of the compressor via an air drier, an intake electromagnetic valve provided in the tank-side suction conduit, a return electromagnetic valve provided in the tank conduit, and a discharge conduit provided so as to branch off from between the discharge side of the compressor and the air drier and configured to be connected to an atmosphere by opening a discharge electromagnetic valve.

Air suspension apparatus

Provided are a linear compressor and a linear compressor control system that do not require a sensor for detecting a position of a mover, and can compute a mover position with high accuracy, in consideration of position dependency of an induced voltage constant. A linear compressorincludes a field elementhaving a first end connected to elastic bodies (and) and including a permanent magnet, an armaturehaving a windingwound around a magnetic pole, and a linear motorthat causes the field elementand the armatureto reciprocate relatively in an axial direction. A stroke of a piston is controlled so that a portion where a gradient of an induced voltage when the induced voltage computed on the basis of a voltage command value output to the linear motorand a value of a current flowing through the windingis at a predetermined value is within a predetermined range corresponds to a top dead center and/or a bottom dead center of a stroke of a pistonconnected to a second end of the field element

Linear compressor and linear compressor control system

Provided is a compressor capable of achieving a reduction in overall size and an improvement in vehicle mountability by using a linear motor. The compressorcomprises a linear motorhaving a reciprocating mover, a compression unithaving a pistonconnected to the moverat one end side of the linear motorso as to reciprocate and a cylinderslidably accommodating the pistonto form a compression chamberB, and an air dryerconnected to a cylinder headof the compression chamberB of the compression unitand filled therein with a desiccantC. The air dryeris disposed along the axis in the movement direction of the moverthe piston

Compressor

A vehicle linear motor includes: a tubular casing; a pair of armatures placed and fixed in the casing; a mover formed in a flat plate shape and placed to face the pair of armatures and to be movable in the casing; and a support member configured to slidably support the mover such that the mover moves in a longitudinal direction of the mover. The mover formed in the flat plate shape includes a plurality of magnets that are arranged at intervals in the longitudinal direction. Each of the pair of armatures has a magnetic pole that is arranged to move the mover relative to the armatures in the longitudinal direction. The casing is mounted on a vehicle such that the longitudinal direction is a horizontal direction, and the mover and the armatures are placed to face each other in the horizontal direction.

Vehicle linear motor

Provided is a compressor in which vibration resistance against an excitation force due to drive of a linear motor is improved. A linear compressorincludes: a moverand a statorwhich relatively move in a first direction and a second direction that is an opposite direction to the first direction; and an inverter portionwhich includes a printed circuit boardand circuit elementsandconnected to the printed circuit boardthrough connection lead linesextending from the printed circuit board, wherein the printed circuit boardis installed in a direction substantially perpendicular to the first direction.

Linear compressor and device mounted with the same

An object of the present invention is to provide a linear motor and a compressor which are effective against a non-fixed structure in which end portions of a resonant spring are not fixed and are capable of restraining loads in an up-down direction and a left-right direction which act on a slider. A linear motor includes a slider () which is driven in a first direction, a resonance spring () which is capable of vibrating in the first direction, and a permanent magnet () which is provided at the slider () and is magnetized in a second direction perpendicular to the first direction. The linear motor includes a bearing () that is movable against both forces of a force in the second direction and a force in a third direction perpendicular to the first direction and the second direction, and an elastic-body support member () which connects the resonant spring () and the bearing () to each other.

Linear motor and compressor

An in-vehicle compression device includes: a compressor including a cylinder and a piston that is slidably provided inside the cylinder and defines a compression chamber; a linear motor including a movable element reciprocatably connected to the piston; and a controller configured to control driving of the linear motor. The in-vehicle compression device is configured to supply a working fluid compressed in the compression chamber to a pressure device provided in a vehicle. The controller is configured to variably adjust a stroke of the piston according to a state of the vehicle.

In-vehicle compression device

An air suspension system includes an air suspension, a compressor, a dryer apparatus, and so forth. The dryer apparatus includes a dryer case, an inner cylinder, a first inlet port, a first outlet port, a first desiccant, an outer cylinder, a second inlet port, a second outlet port, a second other-end side filter, a second desiccant, and so forth. The first desiccant comprises a molecular sieve, for example, which exhibits high water adsorption performance at high temperature. On the other hand, the second desiccant comprises silica gel, for example, which exhibits high water adsorption performance at low temperature.

Dryer apparatus and air suspension system

In an air suspension system, starting of a compressor is facilitated in a condition in which there exists a pressure difference. There is provided an air suspension system in which air compressed by a compressor is supplied to a plurality of air chambers provided between a vehicle body side and a wheel side and configured to perform vehicle height adjustment in accordance with the supply and discharge of air. The compressor has a needle connected to a piston and extending in a moving direction of the piston, and an armature reciprocating the needle in the moving direction of the piston.

Growing community of inventors

Ebina, Japan

Yoshinori Kawai