Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Jidoshokki

Masami Niwa

Shigeru Suzuki

Takahiro Moroi

Masaki Ota

Satoshi Umemura

Tatsuyuki Hoshino

Tatsuya Hirose

Kazuhiko Minami

Hidefumi Mori

Ken Suitou

Kazuya Kimura

Yasuhiro Fujiwara

A control valve has a valve body for opening and closing a valve hole and a solenoid mechanism for urging the valve body by energizing a solenoid. The solenoid mechanism includes a yoke, a plunger housing, a fixed core and a plunger. The yoke accommodates the solenoid and forms a magnetic path. The plunger housing made of stainless steel connects with the yoke, and has a central axis. The fixed core connects with the yoke. The plunger is accommodated in the plunger housing and connects with the valve body. The plunger is attracted to the fixed core to move in the direction of the central axis by applying electromagnetic force from the solenoid. Black oxide treatment is performed to the yoke after the plunger housing is brazed to the yoke.

Control valve and variable displacement compressor having the same

A control valve is used for a variable displacement compressor installed in a refrigerant circuit of an air conditioner. The compressor has a control chamber and a control passage, which connects the control chamber to a pressure zone in which the pressure is different from the pressure of the control chamber. The control valve has a valve body, which is accommodated in the valve chamber for adjusting the opening size of the control passage. A pressure sensing member moves in accordance with the pressure difference between two pressure monitoring points located in the refrigerant circuit. The pressure sensing member moves the valve body such that the displacement of the compressor is varied to counter changes of the pressure difference. The force applied by an actuator corresponds to a target value of the pressure difference. The pressure sensing member moves the valve body such that the pressure difference seeks the target value. An urging member is accommodated in the valve chamber. The urging member urges the valve body in a direction to open the control passage.

Control valve of variable displacement compressor

An electromagnetic spring clutch may be utilized to engage a drive shaft of a auxiliary machine for vehicle and may include an input pulley rotatably supported by a housing of the auxiliary machine for vehicle . An electromagnetic coil may be disposed within the input pulley and an armature may be reversibly coupled to the input pulley by the electromagnetic coil . An output hub may transmit torque applied to the input pulley to the drive shaft . Preferably, the output hub is prevented from moving in an axial direction relative to the drive shaft and a clearance C is defined between the input pulley and the output hub . Preferably, the clearance C is prevented from increasing during operation. A coil spring may couple the armature to the output hub . The coil spring is preferably prevented from the intruding into the clearance C between the input pulley and the output hub

Electromagnetic spring clutches

Fluid heating devices may be utilized, for example, to heat a vehicle coolant and may include a rotor body rotatably supported within a rotor housing. A plurality of blades may be disposed on a circumferential surface of the rotor body and a channel may be defined between each two adjacent blades. Each channel has a base portion, an inner circumferential end and an outer circumferential end. Preferably, the inner circumferential end is longer than the outer circumferential end as measured from the base portion. Further, the outer circumferential ends of the channels may define wall portions and the wall portions are preferably shorter than the inner circumferential ends as measured from the base portions of the channels. In view of this design, it is not necessary to provide shields toward the outer circumferential ends of the channels.

Fluid heating devices

A control valve is used for a variable displacement compressor. The compressor has a crank chamber and a supply passage. The control valve includes a valve housing. A valve chamber is defined in the valve housing. A valve body is accommodated in the valve chamber for adjusting the opening size of the supply passage. A pressure sensing chamber is defined in the valve housing. A pressure sensing member separates the pressure sensing chamber into a first pressure chamber and a second pressure chamber. The pressure at a first pressure monitoring point is applied to the first pressure chamber. The pressure at a second pressure monitoring point located is applied to the second pressure chamber. The pressure sensing member moves the valve body in accordance with the pressure difference between the first pressure chamber and the second pressure chamber. The pressure sensing member is a bellows or a diaphragm, an actuator applies force to the pressure sensing member in accordance with external commands. The force is applied by the actuator corresponds to a target value of the pressure difference. The pressure sensing member moves the valve body such that the pressure difference seeks the target value.

Control valve for variable displacement type compressor

In a heat generator for a vehicle according to the present invention, an operation chamber defined in the heat generator is composed of a heat generation area ( ) which receives therein a rotor, a storage area ( ) which contains viscous fluid, and a boundary opening ( ) of a relatively large surface area, which connects the two areas. The boundary opening is provided with a pair of transfer openings ( A, B) in a point-symmetric arrangement with respect to the rotation axis C of the rotor. Guide portions ( A, B), each corresponding to each of the openings, are provided in the storage area. With this structure, since at least one of the transfer openings and the guide portion corresponding thereto are located below the surface level L of the viscous fluid regardless of the attachment angle of the heat generator, the exchange and circulation of the viscous fluid can be carried out between the heat generation area and the storage area, in accordance with the rotation of the rotor.

Heat generator for vehicle

A heat generator comprises a partitioning wall,in opposed relation to a rotor in a heat generating area, in which the partitioning wall is formed with a supply groove,for introducing the viscous fluid to the outer peripheral area of the heat generating area from a storage area, and a recovery groove,for leading out the viscous fluid to the storage area from the outer peripheral area of the heat generating area. The shape, position and the mounting angle of the supply groove,and the recovery groove,are designed to set the outflow ratio &agr; to not more than 0.92. The outflow ratio &agr; is defined as the ratio (&agr;&equals;Qout,/Qin) of the amount Qout,of the viscous fluid flowing out from the heat generating area due to the forcible transfer function of the recovery groove,to the total amount Qin of the viscous fluid flowing from the storage area into the heat generating area.

Heat generator and design method thereof

In a heat generator of the invention in which a drive shaft,is made of an iron-type metal, a rotor,includes a main rotor body,made of an aluminum-type metal for shearing a silicone oil SO and a bush,made of an iron-type metal inserted in the main rotor body,and secured to the drive shaft,while being positioned in contact with the inner race,of a bearing device,The main rotor body,has at least a gap &Dgr; relative to the inner race,of the bearing device,and is permitted to undergo thermal expansion.

Heat generator

A vehicle heat generator, which can easily be installed in an engine room, includes a housing, and a heating chamber housed in the housing. The heating chamber contains viscous fluid. A heat transfer chamber is housed in the housing about the heating chamber. Circulating fluid flows through the heat transfer chamber. A rotor is rotatably supported in the heating chamber. The rotor shears the viscous fluid to generate heat. A flow passage of the circulating fluid is defined in the heat transfer chamber. The flow passage encompasses substantially the entire rotor. An ingoing passage connects the exterior of the housing to the flow passage. The circulating fluid flows through the ingoing passage from the exterior to the flow passage. An outgoing passage connects the flow passage to the exterior. The circulating fluid flows through the outgoing passage from the flow passage to the exterior. The ingoing passage and the outgoing passage extend substantially parallel to the rotor axis. The structure of the heat generator also facilitates movement of the viscous fluid in the heating chamber.

Growing community of inventors

Kariya, Japan

Masami Niwa