Denso Corporation

Nippondenso Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Toyota Jidosha Kaisha

Yoshimichi Hara

Yutaka Suzuki

Yuji Yokoya

Yasuhiro Tsutsumi

Akira Fukami

Hiroyuki Kawata

Eiju Matsunaga

Toshihisa Yamamoto

Takahiro Yamanaka

Hiroyasu Sugiura

Masanori Naganoma

Makoto Shiozaki

Atsunori Saito

Takao Tsunooka

Katsuaki Matsushima

Masao Suzuki

Shinichi Shimono

Yoshiharu Kato

Kouji Kameyama

Yuuji Kobayashi

Akira Hukami

A driving device includes an electric motor, a rotating shaft, a motor housing, a printed circuit board, an electric power converting circuit, a rear frame end working as a heat radiating member, gel working as a heat transfer member, multiple mounted parts and so on. The heat radiating member is located on a side of the printed circuit board and facing a motor-side surface of the printed circuit board, to which multiple switching elements are mounted. The gel is plastically deformed and adhered to the switching elements and the heat radiating member for transferring heat of the switching elements to the heat radiating member. At least one of the mounted parts is mounted to the printed circuit board and located at a position between a through-hole opposing area and one of the switching elements, which is located at a position closest to a rotational angle sensor mounted to the printed circuit board in the through-hole opposing area.

Driving device

An apparatus for controlling a rotary electric machine includes: first and second inverters corresponding to first and second winding groups; first and second voltage detectors; and first and second control units. Each of the first and second inverters includes plurality of switching elements. The first and second voltage detectors each detects input voltage of corresponding inverter. The first control unit limits a first current command value of the first winding group, when both of the first and second inverter input voltages are in normal, and a first differential value is larger than a determination threshold, and the second control unit limits a second current command value of the second winding group, when both of the first and second inverter input voltages are normal, and a second differential value is larger than the determination threshold.

Control apparatus of rotary electric machine and electric power steering apparatus using the same

A heat radiation structure for an electric device includes: at least one multi-layer substrate including a plurality of base parts made of insulation material and a conductor pattern, which are stacked in a multi-layer structure so that the conductor pattern is electrically coupled with an interlayer connection portion in the base parts; the electric device having at least one of a first electric element built in the at least one multi-layer substrate and a second electric element, which is not built in the multi-layer substrate; and a low heat resistance element opposed to the electric device. The low heat resistance element has a heat resistance lower than the insulation material.

Heat radiation structure of electric device and method for manufacturing the same

An electronic control unit is equipped with a semiconductor module having a semiconductor chip electrically connected to the first circuit pattern and the second circuit pattern. A resin body is wrapped around the semiconductor chip. A first metal plate has a side connected to the semiconductor chip and an other side connected to the first circuit pattern. A radiator projects toward and is connected to the first circuit pattern by a first heat conductor. As a result, heat generated by the semiconductor chip is transmitted to the radiator through the first metal plate, the first circuit pattern, and the first heat conductor during operation of the semiconductor module.

Electronic control unit and rotating electric machine

A motor control apparatus controlling a driving of a motor having two pairs of winding sets is provided. The motor control apparatus includes a current command value calculation portion, a first system, a second system, and a temperature difference calculation portion. The first system includes a first power inverter circuit, a first temperature sensor, a first current limit setting portion, and a first controller. The second system includes a second power inverter circuit, a second temperature sensor, a second current limit setting portion, and a second controller. One of the first controller and the second controller stops a driving of one of the first power inverter circuit and the second power inverter circuit or reduces the current limiting value of this.

Motor control apparatus

The invention is directed to an electromagnetic valve unit, which includes a housing for defining therein a first chamber and a second chamber separated by a wall member having at least a communication hole, and a plurality of electromagnetic valves each having at least a terminal. At least a part of each electromagnetic valve is mounted in the first chamber. A circuit board for mounting thereon an electronic control element for controlling the electromagnetic valves is mounted in the second chamber. The valve unit further includes a conductive member, one end portion of which is connected with each terminal of the electromagnetic valves, and the other end portion of which is connected with the circuit board through the communication hole of the wall member. And, a seal member such as a resilient grommet is provided for holding the conductive member in the communication hole of the wall member to provide a seal therebetween. Each of the electromagnetic valves may be provided with a valve portion and a solenoid coil portion which is separable from the valve portion and which has the terminal connected with the conductive member.

Electromagnetic valve unit

A suspension control system for controlling a suspension having a shock absorber provided for each wheel of a vehicle includes a damping force change rate detector which detects a damping force change rate indicating a rate of change of a damping force of the shock absorber, and a damping force controller which alters the setting of the damping force on the basis of a relationship between the damping force change rate and an adjustment reference value. The system also includes a road surface condition detector which detects a condition of a road surface on which the vehicle is running on the basis of a change of the damping force of the shock absorber. Further, the system includes a damping force adjustment correcting unit which corrects the adjustment reference value by learning the adjustment reference value on the basis of a parameter related to the damping force of the shock absorber which reflects the condition of the road surface.

Suspension control system

A suspension control system for controlling a suspension having a shock absorber provided for a wheel of a vehicle includes a damping force detector which generates a damping force detection signal which indicates a change of a damping force of the shock absorber based on a condition of a road surface on which the vehicle is running. The system also includes a sprung resonance component extraction unit which extracts a sprung resonance component signal from the damping force detection signal. The sprung resonance component signal includes components having frequencies around a sprung resonance frequency of the shock absorber. Further, the system includes a determining part which determines whether or not the sprung resonance component signal exceeds a first level range provided for detecting a sign of the occurrence of a long-term vehicle vibration and which outputs a determination result. Moreover, the system includes a damping force controller which controls the shock absorber so that when the determining part determines that the sprung resonance component signal exceeds the first level range, the damping force of the shock absorber is altered to and maintained at an increased level and thus the suspension is maintained at a state which corresponds to the increased level and which is harder than before.

A suspension control system for controlling a suspension having a shock absorber provided for a wheel of a vehicle includes a damping force change rate detector which detects a damping force change rate indicating a rate of change of a damping force of the shock absorber, and a damping force controller which alters the setting of the damping force on the basis of the relationship between the damping force change rate and an adjustment reference value. The system also includes a road surface condition detector which detects, for every first period, the condition of a road surface on which the vehicle is running on the basis of a change of the damping force of the shock absorber, and a damping force adjustment correcting unit which corrects the adjustment reference value by learning, for every second period, the adjustment reference value on the basis of a parameter related to the damping force of the shock absorber which reflects the condition of the road surface. Further, the system includes a period adjustment unit which adjusts the first period on the basis of a vehicle speed.

A shock absorber control system having shock absorbers provided respectively between wheels of a vehicle and a body thereof includes road surface condition detecting units provided for the respective shock absorbers, and damping force characteristic alteration units provided for the respective shock absorbers. The shock absorber control system also includes a correction unit for separately generating signals indicative of detection characteristics of the road surface condition detecting units provided for the respective shock absorbers on the basis of road surface condition detection signals generated by the road surface condition detecting units and for separately correcting either reference values used for determining whether or not the road surface is rough by the damping force characteristic alteration units or the road surface condition detection signals on the basis of the detection characteristics of the road surface condition detecting units provided for the respective shock absorbers.

Shock absorber control system

A suspension control system controls suspensions provided for wheels of a vehicle includes a driving condition detecting part for detecting a driving condition of the vehicle, and a determination part for determining whether or not the driving condition detected by the driving condition detecting part coincides with a predetermined driving condition. The suspensions are grouped into a plurality of groups. Also the system includes a control part for separately controlling the suspensions on the basis of the driving condition when the determination part determines that the driving condition does not coincide with the predetermined driving condition and for controlling the suspensions for each of the groups so that the suspensions in an identical group are set to an identical condition when the determination part determines that the driving condition coincides with the predetermined driving condition.

A drive system of a piezo-type actuator for use in a motor vehicle, which piezo-type actuator is constructed with a piezoelectric device which is expandable and contractible in accordance with application of a voltage thereto. The drive system includes a voltage-increasing section for increasing an output voltage of a power source mounted on the motor vehicle so as to develop a drive voltage for the piezo-type actuator and a voltage-application section for applying to the piezoelectric device of the piezo-type actuator the drive voltage. Also included in the drive system is an abnormality detection section which is arranged so as to an abnormality of the drive voltage developed by the voltage-increasing section. A safety controller is responsive to an abnormality signal from the abnormality detection section for prohibiting the application of the drive voltage to the piezoelectric device thereof and further discharging charges accumulated in the piezoelectric device thereof when the abnormality detection section detects the abnormality of the developed drive voltage. With this arrangement, it is possible to prevent troubles due to the abnormality of the drive voltage to be applied to the piezoelectric device of the piezo-type actuator.

Drive system of actuator having piezoelectric device for use in motor

A control circuit for a vehicle-mounted air conditioner having plural dampers therein comprises a manual command entry unit for entering command signals to a computer unit. The computer unit includes a first computer constantly powered by a vehicle-mounted storage battery to receive a temperature resetting command signal from the entry unit and a second computer which is powered from the battery through an engine ignition key switch to receive control data from the first computer to control the air conditioner. A plurality of operating parameter sensors also supplies sensed operating parameters to the second computer to permit it to control one or more of the dampers to direct conditioned air to the vehicle compartment. A display unit receives data from the computer unit to provide visual display of the reference temperature and the operating conditions of the air conditioner.

Growing community of inventors

Kuwana, Japan

Yoshimichi Hara