Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Ryosuke Ishida

Teppei Hirotsu

Taizo Yamawaki

Yasushi Sugiyama

Kenichi Hoshino

Takuya Mayuzumi

Ming Liu

Hirofumi Kurimoto

Hiroki Yamashita

Nobuyasu Kanekawa

Yoshio Kawai

Goichi Ono

Shinya Kajiyama

Hidehiro Toyoda

Katsuya Oyama

Hideki Sekiguchi

Ayumu Hatanaka

Kiyoomi Kadoya

Miki Hiraoka

Yasuhiko Okada

Kiyoshi Aiki

An electronic control unit includes: a wiring substrate having a first surface on which a conductor wire is formed; a first electronic component that is implemented on the first surface of the wiring substrate, and has a large heat generation amount; a second electronic component that is implemented on the first surface of the wiring substrate, and has a heat generation amount smaller than the first electronic component; and a resin that covers the first electronic component, the second electronic component, and the first surface of the wiring substrate, and a second surface of the wiring substrate that is opposite to the first surface. A distance between an outer surface of the resin immediately below the first electronic component, and the second surface of the wiring substrate is longer than a distance between an outer surface of the resin immediately above the second electronic component, and the first surface of the wiring substrate.

Electronic control unit

A correct commutation is realized even if a communication error occurs due to a change in an actuator drive current. An electronic control unit that includes a communication section outputting a control signal and that can transmit the control signal to an actuator connected to the electronic control unit via a power line, includes an actuator operation detection section. When the actuator operation detection section detects an actuator operation, the communication section retransmits the control signal at timing of detecting the actuator operation.

Electronic control apparatus provided with power line communication function, actuator, electronic control system, and automobile using same

A power line communication apparatus includes a drive block including an actuator control circuit and a drive circuit and a communication block. The actuator control circuit generates a control pulse for controlling an actuator, and controls a transition timing of the control pulse during an operation period set within a communication cycle by a communication clock. The drive circuit controls a driving current of the actuator supplied from a DC power source through a power line based on the control pulse in which the transition timing is controlled. The communication block generates the communication clock, and modulates a current flowing through the power line in response to data to be transmitted during a signal transmission period different from the operation period, set within the communication cycle.

Power line communication apparatus and electronic control apparatus including power line communication apparatus

To achieve, in a load drive device including an H-bridge circuit, miniaturization of a capacitor or/and the constituent elements of the H-bridge circuit (e.g., reduction in volume) with circuit elements, for example, switching elements included in the H-bridge circuit, being inhibited from breaking down or destroying even in a case where a load is overloaded. The invention is disclosed in which, as a solution to the achievement, first and second modes are provided as a switching mode for the switching elementsandand switching is appropriately performed between the first and second modes.

Load drive device

A step-up/down power supply, in which a circuit area is small, includes a step-down unit that generates an output voltage lower than an input voltage by turning on or off a step-down switch in which the input voltage of the step-up/down power supply is applied, and a step-up unit that generates an output voltage higher than the input voltage by turning on or off a step-up switch in which a ground is applied. A step-down gate voltage control circuit controls a gate voltage of the step-down switch and includes a gate voltage generating circuit that generates a first voltage and a second voltage for turning on the step-down switch. A gate voltage switching circuit switches between the first voltage and the second voltage, and the gate voltage generating circuit includes a first voltage source that generates the first voltage and a second voltage source that generates the second voltage.

Step-up/down power supply and power supply circuit

The present invention addresses the problem of obtaining an electronic control device for a vehicular automatic transmission that suppresses sudden acceleration, sudden deceleration, and gear shift shock that occur when the transmission moves into a fail-safe mode due to the electronic control device stopping during a main CPU abnormality. An electronic control devicefor a vehicular automatic transmission has: a main CPUthat performs gear shift control for the vehicular automatic transmission; and a sub-CPUthat detects abnormalities in the main CPU. When the sub-CPUdetects an abnormality in the main CPUwhile the vehicle is traveling, the sub-CPUstops the gear shift control executed by the main CPU

Electronic control device for vehicular automatic transmission

The present invention achieves, using simple circuits, timing synchronization among ECUs of an electronic control device which is configured from a driver ECU, a sensor ECU, and an integrated ECU which are connected over a network. This electronic control device is provided with a driver ECU for driving various loads for vehicular control, a sensor ECU for sampling various sensor signals, and an integrated ECU which is connected to the driver ECU and sensor ECU over a network and calculates command values to the various loads in accordance with various sensor data, the electronic control device being characterized in that the driver ECU has timer D for generating internal timing, the sensor ECU has timer S for generating internal timing, and the integrated ECU has timer M serving as a reference for timer D and timer S.

Electronic control device

The present invention is to provide a magnet coil drive control device that can efficiently suppress conduction noise while reducing the capacitance of a capacitor. A capacitor and an impedance element are arranged in series on the connecting line connecting the positive electrode line and the negative electrode line of a DC power supply, the connecting line between the capacitor and the impedance element is connected to one end of a magnet coil via a freewheeling diode, and the portion between the freewheeling diode and the one end of the magnet coil is connected to the positive electrode line or the negative electrode line by a switching element. Conduction noise caused by the driving current of the magnet coil can be suppressed by the impedance element, and the capacitance of the capacitor can be further reduced. Accordingly, the magnet coil drive control device can be made smaller in size.

Electromagnetic coil driving control device

Disclosed is an electronic control unit capable of identifying an abnormality in a power supply voltage without narrowing the operating voltage range, and having minimal effects on cost and the circuit mounting surface area. The ECU includes a microcomputer containing an input terminal VCCin and an input terminal Vrin, a power supply IC that supplies a power supply voltage VCC to the input terminal VCCin, and as a reference-voltage-generator circuit a voltage-divider resistor and a voltage-divider resistor configuring a voltage-dividing circuit that outputs a sub-divided voltage Vc is sub-divided from the power supply voltage VCC, a capacitor coupled at one end to the input terminal Vrin and coupled on at the other end to ground, and a voltage isolation element coupled between the voltage-dividing circuit and the input terminal Vrin.

A current control semiconductor device that can detect a current with high precision within an IC of one chip by dynamically correcting a variation in a gain a and an offset b, and a control device using the semiconductor device are provided. A transistor, a current-voltage converter circuit, and an AD converterare disposed on an identical semiconductor chip. Reference current generator circuitsand' superimpose a current pulse Ic on a current of a load, and vary a voltage digital value output by the AD converter. A gain/offset correction unitsubjects a variation in a voltage digital value caused by the reference current generator circuits&#x2032; to signal processing, and dynamically acquires gains a, a&#x2032; and offsets b, b&#x2032; in a linear relational expression of the voltage digital value output by the AD converterand a current digital value of the load. A current digital value calculation unitcorrects a voltage value output by the AD converter with the use of the gain and the offset acquired by the gain/offset correction unit

Current control semiconductor device and control device using the same

A current control device capable of performing widely applicable failure detection without a motor rotation speed sensor is provided. A current control semiconductor element includes, on a same semiconductor chip, a transistor that drives load, a current detection circuit that detects current of the load, a compensator that calculates an on-duty of the transistor from a current command value and a current value output from the current detection circuit, and a PWM timer that generates a pulse turning on the transistor on the basis of the on-duty. A microcontroller sends the current command value to the current control semiconductor element, receives the current value output from the current detection circuit and the on-duty output from the compensator from the current control semiconductor element, and detects failure of the current control semiconductor element on the basis of the received current value and on-duty.

Growing community of inventors

Hitachinaka, Japan

Ryosuke Ishida