Mitsubishi Electric Corporation

Nec Corporation

Kensuke Hayashi

Keiichi Enoki

Shingo Yamaguchi

Osamu Ishikawa

Nozomu Kamioka

Tomohisa Shoda

Shinji Watanabe

Satoshi Wachi

Yoshimasa Nishijima

Toshiaki Date

Masutaka Watanabe

Yuji Zushi

Eiji Kanazawa

Masanori Tsuchihashi

To provide a rotational angle detection apparatus which can determine abnormality of the rotational angle detection apparatus only by detection information of the rotational angle detection apparatus even when the rotational speed is low. A rotational angle detection apparatus totals sensor output values of N−1 pieces of the rotation detection sensors other than the diagnosis object sensor; calculates a value obtained by inverting positive/negative of a total value, as an estimation value of sensor output value of the diagnosis object sensor; calculates an estimation difference which is a difference between a sensor output value of the diagnosis object sensor, and the estimation value of sensor output value of the diagnosis object sensor; and determines that abnormality occurred in the diagnosis object sensor, when the estimation difference is out of a determination range for estimation difference.

Rotational angle detection apparatus

A control device () includes: target deceleration calculation means () for calculating a target deceleration by using a target deceleration map in which a target deceleration is set for each vehicle speed; command power-generation torque calculation means () for calculating a command power-generation torque based on the target deceleration, a rotation speed of a power generator (), and a transmission gear ratio of a transmission (); and command Duty calculation means () for calculating a command Duty based on the command power-generation torque, and the rotation speed and an output voltage of the power generator (). The target deceleration map is calculated based on a vehicle-speed shift in accordance with actual running conditions when a vehicle is decelerating with fuel stop.

Vehicle power-generator device and vehicle power-generation control method

Provided is a power-generation control device capable of appropriately using a drive belt looped around a power generator and an internal-combustion engine mounted on a vehicle. The device monitors a difference between an actual generated current of a rotating electrical machine and an estimated generated current estimated from estimated power-generation torque for controlling power generation of the rotating electrical machine, which corresponds to a power-generation torque command, or the like. When a difference equal to or more than a predetermined value occurs between the actual and the estimated generated currents, the power-generation control device limits the estimated power-generation torque so as to be reduced, and further limits the estimated power-generation torque with use of learning limiting power-generation torque calculated based on the estimated power-generation torque at a time when the difference has occurred between the actual generated current and the estimated generated current.

Vehicle power-generation control device and control method thereof

A power source current control unit () controls a magnetic-field current PWM control signal (PW) for PWM-controlling a magnetic-field current of an electric rotating machine () so that the value of a power source current flowing in a power source apparatus () can be controlled in a non-energization manner to be zero or a value near to zero; in the case where the power source voltage stability determination unit () determines that during a predetermined period, variation in a power source inter-terminal voltage value (V) of the power source apparatus () is within a predetermined range, the power source SOC estimation unit () estimates the state of charge of the power source apparatus (), based on the voltage value (V) of the power source apparatus ().

Power source monitor

In a power supply system provided with an assembled battery supervisory device which supervises an assembled battery composed of storage elements connected in series with one another, the system using the assembled battery is obtained which makes it possible to supply electric power to the assembled battery supervisory device, with a simple arrangement. The arrangement is such that electric power for the assembled battery supervisory device is obtained from a part of storage elements constituting the assembled battery. The cell balancer is driven based on the average consumption electric current of the assembled battery supervisory device so as to suppress a deviation in the amount of charge between those storage elements which supply electric power to the assembled battery supervisory device, and those storage elements which do not supply electric power to the assembled battery supervisory device, resulting from the average consumption electric current of the assembled battery supervisory device.

Power supply system using an assembled battery

An engine start control device includes a mechanical pump supplying hydraulic pressure; an electric pump connected in parallel to the mechanical pump and independently driven; a device for stopping the engine when an idling stop condition is satisfied and starting the engine when a restart condition and a fuel injection condition are satisfied; a device for driving the electric pump when the hydraulic pressure is less than a first hydraulic pressure when the engine is stopped by idling stop; and a device for driving a motor at a target speed and for performing control so that the change in the target speed is small compared with the change exhibited when the hydraulic pressure is equal or higher than a second hydraulic pressure, when the hydraulic pressure is less than the second hydraulic pressure, and the restart condition is satisfied after the idling stop.

Engine start control device

A vehicle drive control system includes a motor coupled with the driving shaft of an internal combustion engine so that torque can be transmitted to the drive wheels when fuel supply to the engine is cut off. The vehicle travels in a creeping mode in this state while motoring of the engine is performed through driving force of the motor. When accelerator depression is detected, fuel injection into a cylinder waiting for the intake stroke of the engine is begun and the engine is started. The crank angle position at a time when fuel injection is started is utilized as a reference position. When the crankshaft of the engine rotates from the reference crank angle position to a predetermined crank angle position, driving by the motor is stopped and the vehicle is then driven by the engine.

Vehicle drive control system

Provided is an automatic stop and restart device for an engine that is capable of suppressing occurrence of an abnormal condition even if a transmission state is changed during an engine restart process after an engine restart condition is satisfied in an automatic engine stop process. A controller performs the automatic engine stop process and the engine restart process. If a determined state of a transmission is a drive range, a transmission state determination unit drives a pinion gear thrust unit at timing determined by a first pinion gear thrust timing determination unit. If the determined state of the transmission is a non-drive range, the transmission state determination unit drives the pinion gear thrust unit at timing determined by a second pinion gear thrust timing determination unit.

Automatic stop and restart device for an engine

An electricity generation control device calculates a virtual electricity generation efficiency where a transmission gear ratio of a continuously variable transmission is changed with a minute amount when an electricity generation condition by an engine drive is realized, changes the transmission gear ratio with a minute amount in a case where the virtual electricity generation efficiency is superior to a present electricity generation efficiency, calculates a virtual electricity generation efficiency where an engine drive torque and an electricity generation drive torque are changed with a minute amount, and changes the engine drive torque and the electricity generation drive torque in a case where the virtual electricity generation efficiency is superior to a present electricity generation efficiency, in which the minute amount change of the transmission gear ratio and the minute amount change of the engine drive torque and the electricity generation drive torque are alternatively performed.

Electricity generation control device for vehicle

An object of the present invention is to turn microphones accurately and quickly toward a sound source. The first microphone pair is rotated by rotation means and driving means, so that the microphones are equidistant from a sound source. The sound picked up by the microphones is analyzed in a plurality of frequency ranges to obtain delay time components of the arrival of the sound wave. The delay time components are averaged with a prescribed coefficients so that the lower frequency components hardly affects the result of the direction detection. The averaged delay is converted into an angle of direction of the sound source. Thus, the microphones pair is directed in front of the sound source on the basis of the direction angle converted from the averaged delay time.

Apparatus for detecting direction of sound source and turning microphone toward sound source

An echo canceller apparatus consists of a frame aligner circuit and an echo canceller. The frame aligner circuit forcibly generates a data slip of a receive input signal by a recursive buffer of a FIFO when a slip between timings of receive and transmit clocks is accumulated. A data slip detection circuit outputs its detection of the data slip to an adaptation correction section of the echo canceller. In the adaptation correction section, when the data slip of the receive input signal is detected depending on the output of the data slip detection circuit, a correction operation is performed so that a delay by N taps is increased in an impulse response of an H-register, thereby canceling an echo.

Echo canceller apparatus

An echo canceler is disclosed having a voice detector. When the voice detector detects the absence of input signals, the echo canceler is trained. In the training mode, the echo canceler receives an impulse signal from an impulse generator, as input through a switching device. When the input of the echo canceler is the impulse signal, a switch is turned off, a signal on a receiving line is stored in a tap coefficient memory, and the impulse signal on a transmitting line is stored in a transmission signal memory. Using the signals stored in the two memories, a convolution operation is performed by a convolution arithmetic unit. The data of the tap coefficient memory directly before the end of training are used for the tap coefficients after the training period.

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Chiyoda-ku, Japan

Kensuke Hayashi