Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Toshiaki Date

Satoshi Wachi

Nozomu Kamioka

Shingo Yamaguchi

Takahiko Oono

Noriya Sagayama

Hideaki Tani

Hirofumi Ohuchi

Keiichi Enoki

Shiro Yonezawa

Takeru Okabe

Akira Furuta

Kensuke Hayashi

Yasukazu Murata

Michitaka Fujiwara

Eiji Kanazawa

An in-vehicle power storage device that discharges a battery in a case where collision of a vehicle is detected or predicted, and stops discharging the battery when an over-discharged state has not been reached, and a control method thereof. The in-vehicle power storage device includes: a battery mounted in a vehicle; charge-state detection means for detecting a charge state of the battery; and a discharging load for discharging the battery, and a control device which includes: battery charge-state detection means for detecting a charge state; a battery discharger means for discharging the battery using the load if collision of the vehicle is detected or predicted; and discharge stopping means to stop discharging the battery before the battery becomes over-discharged.

In-vehicle power storage device and control method thereof

A throttle valvethat adjusts an amount of air flowing into an intake passage of an internal combustion engine, a fuel injection valvethat injects fuel into the internal combustion engine, and a generator-motorthat drives the internal combustion enginevia a drive beltare controlled by an internal combustion engine control unit. The internal combustion engine control unitopens the throttle valveto a first throttle opening after detecting a request to start the internal combustion engine, then causes the fuel injection valveto inject fuel while maintaining the first throttle opening, and then opens the throttle valveto a second throttle opening that is larger than the first throttle opening.

Control apparatus and control method for internal combustion engine

To reduce an error of a phase difference between an angle of a crankshaft of an internal combustion engine and an angle of a rotor of a motor generator, provided are a control device for a hybrid vehicle and a control method for a hybrid vehicle, for detecting the angle of the crankshaft, detecting the angle of the rotor of the motor generator, determining whether or not a condition for ensuring that the error of the phase difference between the angle of the crankshaft and the angle of the rotor of the motor generator is becomes small is satisfied, and calculating the phase difference when the error of the phase difference is determined to be small.

Device for controlling hybrid vehicle and method for controlling hybrid vehicle

An AC rotary machine control apparatus is provided with: predriver ICs for giving drive signals to the gates of power converting switching elements bridge-connected to the respective phases of an AC rotary machine; predriver IC output cutting-off switching elements for operating on the basis of a cut-off signal from a calculation processing device having detected an abnormality state of the predriver ICs, and cutting off drive signals given from the predriver ICs to the gates of the power converting switching elements; and a gate driver circuit for becoming conductive on the basis of a signal from the calculation processing device and giving drive signals from a power source circuit to all the gates of the lower arm elements of the power converting switching elements, when drive signals from the predriver Ics are being cut off by the predriver IC output cutting-off switching elements.

AC rotary machine control apparatus

A second switch () is provided between a first power supply circuit including a first capacitor () connected in series with a first switch () and a second power supply circuit including a second capacitor (). In a case where a predetermined condition that necessitates supply of electric power from one power supply circuit to the other power supply circuit is established, the first switch () is opened to disconnect the first capacitor () in the first power supply circuit, and then the second switch () is closed to connect between the first power supply circuit and the second power supply circuit.

Power supply management system and power supply management method

A start control device for an engine includes an engine control unit, a motor control unit, and a control unit which controls the engine control unit and the motor control unit, wherein the control unit, when transferring an engine restart control mode from a motoring control state to a fuel combustion control state, executes the transfer via a motor/engine combined control state, and sets the timing of transferring from the motoring control state to the motor/engine combined control state, to a timing at which a crank angle of a cylinder where fuel is combusted first after starting fuel injection reaches a crank angle at which it is estimated that torque is generated by the first combustion of fuel in the cylinder.

Engine start control device

While a current cutoff mechanism cuts off charging and discharging currents for a second electric storage device, a DC/DC converter is controlled so as to be in a state where electric power is supplied from a low-voltage side to a high-voltage side, applies voltage conversion to an input voltage of the low-voltage side so that an output voltage of the high-voltage side becomes a predetermined voltage, and after a predetermined state where the induction voltage of the AC power generator can be supplied to the low-voltage side is reached, control of the DC/DC converter is switched from the state where electric power is supplied from the low-voltage side to the high-voltage side to a state where electric power is supplied from the high-voltage side to the low-voltage side.

Vehicle power source system

Provided are a power generation control method for a vehicle configured to perform idling stop at a predetermined vehicle speed or less by a stop/start system, the vehicle including: a power generator configured to be driven by an internal combustion engine to generate power; and a battery to be charged by the power generated by the power generator, the power being generated in the vehicle under control so as to reduce an amount of fuel to be consumed by the internal combustion engine for power generation, the power generation control method including: detecting a charged and discharged state of the battery; and controlling the internal combustion engine to interrupt power generation involving fuel consumption when a charged state of the battery has recovered to a charged state before the idling stop through charging after the idling stop in accordance with the detected charged and discharged state.

Power generation device for vehicle and power generation control method

A travel control device () provided to a vehicle travel device () performs correction calculation of the rate of change of a requested acceleration using a relatively small value when the rate of change of the requested acceleration obtained from an angle sensor () is small, and performs correction calculation of the rate of change of the requested acceleration using a relatively large value when the rate of change of the requested acceleration obtained from the angle sensor () is large.

Vehicle travel device and vehicle travel control method

An engine stopping section first selects, when an engine stop condition is satisfied, a power-generation braking mode in which a power-generation braking torque is applied to the engine by a power generation operation of the generator, to thereby apply the power-generation braking torque to the engine, and then selects a short-circuit braking mode in which a short-circuit braking torque is applied to the engine by short-circuiting each energization phase of an armature coil with a semiconductor switch and by causing a field current to flow through a field coil, to thereby apply the short-circuit braking torque to the engine.

Engine stop control apparatus and engine stop control method

An internal combustion engine control apparatus includes a first period in which the target heater applied effective voltage is set to a first target voltage with which the temperature of an exhaust gas sensor becomes a target temperature at a time when the internal combustion engine is being operated; a second control period in which after the automatic stop mode of the engine has started, the target heater applied effective voltage is set to a second target voltage lower than the first target voltage; and a third period in which after the second period, the target heater applied effective voltage is controlled to a third target voltage higher than the second target voltage and with which the temperature of an exhaust gas sensor becomes a target temperature at a time when the engine is in the automatic stop mode.

Internal combustion engine control 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

A vehicular power generation system includes: a battery which is charged by power generation electric power of a generator that is driven by an internal combustion engine; and a power generation control device which reduces the amount of fuel to be consumed for power generation of the internal combustion engine. The power generation control device includes: a unit which sets an operating range that is small in the amount of fuel to be consumed for an increase in torque of the internal combustion engine; a unit which sets electric power with high power generation efficiency to a target value of power generation electric power according to rotation speed and power generation voltage of the generator; and a unit which controls so that the amount of power generation of the generator is a target value when the operating point of the internal combustion engine is in the operating range.

Vehicular power generation system and power generation control method for the same

An internal combustion engine fuel pressure control apparatus includes: fuel pressure control means including a spill valve and a high-pressure fuel pump that pressure-feeds fuel to an accumulation chamber; and control means that calculates a control quantity of the fuel pressure control means on the basis of pressure information of fuel supplied to an injector and variably sets the pressure of the fuel supplied to the injector, wherein the control quantity calculated by the control means is configured by a first feedback quantity that feeds back the fuel quantity that the high-pressure fuel pump pressure-feeds to the accumulation chamber and a second feedback quantity that feeds back the timing at which the spill valve opens or closes a fuel relief path.

Internal combustion engine fuel pressure control apparatus

A fuel pressure control device includes a fuel injection valve, a pressure accumulation chamber for storing a high pressure fuel, a high pressure pump, a fuel pressure control valve, a fuel pressure sensor for detecting a fuel pressure PR in the pressure accumulation chamber, an air-fuel ratio sensor for detecting an air-fuel ratio condition, target value calculation means for calculating a target fuel pressure and a target air-fuel ratio AFo, fuel pressure control means for performing feedback control of the fuel pressure control valve such that the fuel pressure PR matches the target fuel pressure, abnormality diagnosis means for diagnosing the fuel pressure sensor, and fuel pressure estimation means for calculating an estimated fuel pressure PRs based on the air-fuel ratio condition when an abnormal condition occurs. The fuel pressure estimation means corrects the estimated fuel pressure PRs such that the air-fuel ratio condition is guided to the target air-fuel ratio AFo.

Growing community of inventors

Tokyo, Japan

Toshiaki Date