Miyamoto Katsuhiko

Bio: Miyamoto Katsuhiko is an academic researcher from Mitsubishi. The author has contributed to research in topics: Internal combustion engine & Fuel injection. The author has an hindex of 13, co-authored 188 publications receiving 846 citations. Previous affiliations of Miyamoto Katsuhiko include Mitsubishi Motors.

Automotive vehicle engine with cylinder suspending mechanism for switching between a partial-cylinder non-working mode and an all-cylinder working mode depending on running conditions of the engine

Abstract: The present invention relates to an automotive vehicle engine having controls for switching between a whole cylinder working mode and a partial cylinder non-working mode by making a valve motion arrangement operated in the intake and exhaust process. The automotive vehicle engine comprises-a revolution sensor, a boost pressure sensor, an ignition driving apparatus and a controlling apparatus for controlling the cylinder suspending mechanism and the ignition driving apparatus. The partial cylinder non-working mode or the all cylinder working mode is determined on the basis of the revolution speed "Ne" and the boost pressure data "Pb". An ignition timing retard process and an idle speed shifting-up process are performed so as to control the torque variation of the engine caused at the time when the all cylinder working mode is switched to the partial cylinder non-working mode or when the partial cylinder non-working mode is switched to the all cylinder working mode, thereby preventing torque shock from occurring and thereby preventing the engine from stopping and enhancing drivability.

Control apparatus for a cylinder-injection spark-ignition internal combustion engine

Abstract: A control apparatus for a cylinder-injection engine includes an electronic control unit which calculates an average effective pressure according to throttle opening and engine rotation speed, calculates an intake air amount per intake stroke according to an intake air amount detected by an airflow sensor and engine rotation speed, and calculates a volumetric efficiency based on the calculated intake air amount. A fuel injection amount is calculated according to an intake air amount and a target air-fuel ratio calculated based on a target average effective pressure when a compression-stroke injection mode is selected, and according to the intake air amount and a target air-fuel ratio calculated based on the volumetric efficiency when an intake-stroke injection mode is selected, whereby a fuel injection control is made based on the target air-fuel ratio suited to the injection mode, while managing the target air-fuel ratio, thereby always ensuring a proper combustion control and a stabilized engine operating state. During the changeover of injection mode, the target air-fuel ratio, determined for an injection mode before the changeover, is changed, at a speed which changes stepwise, to that determined for an injection mode after the changeover, whereby an engine torque change caused by a sudden change in fuel injection amount is suppressed to a minimum, thereby reducing a torque shock.

Vehicle control device

Abstract: PROBLEM TO BE SOLVED: To provide a vehicle control device making it possible to upgrade recovery efficiency of regenerative energy.SOLUTION: A vehicle control device is used for a vehicle that transmits power of a rotary electric machine 3 to driving wheels 6 via a transmission 4, transmits rotations of the driving wheels 6 to the rotary electric machine 3 via the transmission 4, and obtains regenerative energy from the rotary electric machine 3. The vehicle control device includes a control means that, when an accelerator opening degree is reduced by a predetermined quantity or more, implements shift control so that a shift position of the transmission 4 is up-shifted. When the accelerator opening degree is reduced by the predetermined quantity or more within a predetermined period of time, the control means inhibits the up-shift of the shift position, so that regenerative energy is obtained from the rotary electric machine 3. The control means sets the predetermined period of time so that the predetermined period of time when the shift position of the transmission 4 is at a higher shift position is longer than the predetermined period of time when the shift position is at a lower shift position, and inhibits the up-shift of the shift position of the transmission 4. In addition, when the accelerator opening degree is changed in an increased direction after the up-shift is inhibited, the control means releases the inhibition of the up-shift.

Controller for hybrid vehicle

Abstract: PROBLEM TO BE SOLVED: To provide a controller for a hybrid vehicle configured to quickly increase an engine rotation speed to be synchronized with the rotation speed of a clutch output shaft after a stopped engine is started, and thereby quickly switching a travel mode by clutch engagement, when the mode is changed from motor mode to engine mode according to an acceleration request.SOLUTION: The stopped engine is started when an instruction to select the engine mode is issued, and a clutch output rotation speed Nout is estimated which is to be obtained when an estimation time Tpd corresponding to the time required for engine start and rotation synchronization elapses, a target value Ntgt obtained by adding a predetermined value to the estimated rotation speed Nout of the clutch output shaft is applied to the control of the engine rotation speed Ne from the start of the instruction to switch the traveling mode. After the engine rotation speed Ne increases and reaches the target value Ntgt, the clutch is engaged and the switching of the traveling mode is completed.

Direct fuel injection system for vehicle IC engine

Abstract: The engine management system for spark ignition IC engines with fuel injection monitors the position of the throttle pedal to derive a first measure of engine torque. The gas flow during the suction phase of the combustion cycle provides a second measure of engine torque. The control system decides between two modes of fuel injection; during the suction phase for large torque and during the compression phase for small torque. The control ensures a smooth change over between the two modes of fuel injection. The control system derives two figures for the fuel/air mixture and amount of fuel injected, based on the two methods for calculating the engine torque. It also decides which mode of fuel injection is to be used and provides a smooth change in torque when changing from one injection mode to the other. The ignition timing can also be varied during the change over to assist in providing a smooth change.

System and method for recharging a battery exposed to a harsh environment

Abstract: A rechargable battery with an internal microcontroller. The microcontroller contains a memory in which data regarding the environment to which the battery is exposed are stored. These data are read by a processor integral with the charger used to charge the battery. If these data indicates the battery may have been subjected to a harsh environment for an excessive period of time, the charger performs a complete state of health evaluation of the battery.

Vehicle Control System

Abstract: A vehicle control system which can ensure high reliability, real-time processing, and expandability with a simplified ECU configuration and a low cost by backing up an error through coordination in the entire system without increasing a degree of redundancy of individual controllers beyond the least necessary level. The vehicle control system comprises a sensor controller for taking in sensor signals indicating a status variable of a vehicle and an operation amount applied from a driver, a command controller for generating a control target value based on the sensor signals taken in by the sensor controller, and an actuator controller for receiving the control target value from the command controller and operating an actuator to control the vehicle, those three controller being interconnected via a network. The actuator controller includes a control target value generating unit for generating a control target value based on the sensor signals taken in by the sensor controller and received by the actuator controller via the network when the control target value generated by the command controller is abnormal, and controls the actuator in accordance with the control target value generated by the control target value generating unit.

Engine starting system

Abstract: An engine starting system includes a throttle valve, an alternator, an engine speed sensor and an electronic control unit (ECU). The ECU functionally includes an automatic engine stop controller for automatically stopping the engine by interrupting fuel injection when predefined automatic engine stop conditions are satisfied, and an automatic engine restart controller for automatically restarting the engine when predefined engine restart conditions are satisfied. The automatic engine stop controller sets the quantity of intake air at a level higher than a minimum quantity of intake air necessary for keeping the engine running, decreases the amount of electric power generated by the alternator in an early part of automatic engine stop control operation, and decreases the quantity of intake air and causes the alternator to once decrease the amount of electric power generated thereby at a point in time when the engine speed drops down to a predetermined reference engine speed, and causes the alternator to later increase the amount of electric power generated thereby.

Exhaust emission control device for internal combustion engine

Abstract: An exhaust emission control device for an internal combustion engine, capable of supplying a just enough amount of reducing agent to a selective reduction catalyst even when a NOx purification ratio of the catalyst is changed by various causes, thereby enabling a high NOx purification ratio and very low exhaust emissions to be maintained. An ECU calculates a filtered value based on a signal from an exhaust gas concentration sensor, calculates a moving average value of a product of the filtered value and a reference input, calculates a control input such that the moving average value becomes equal to 0, and adds a reference input to the control input to calculate an FB injection amount. The ECU calculates an FF injection amount with a predetermined feedforward control algorithm, and adds the FF injection amount to the FB injection amount, to thereby calculate a urea injection amount.

Control apparatus for internal combustion engine

Abstract: PROBLEM TO BE SOLVED: To provide a control apparatus for an internal combustion engine, capable of activating a catalyst of the internal combustion engine at an early stage when the internal combustion engine is started in a cold condition.SOLUTION: The control apparatus for the internal combustion engine includes: a first fuel injection valve 17 for injecting fuel to combustion chambers 6 of an internal combustion engine 1 having a plurality of cylinders; a second fuel injection valve 18 for injecting the fuel to intake routes Ri; an ignition plug 29 for igniting the fuel; a catalyst 15 for purifying exhaust air in an exhaust route Re; and catalyst temperature rise control means A3 for raising the temperature of the catalyst 15 by lag controlling ignition time of the ignition plug. The catalyst temperature rise control means A3 has a temperature rise mode M2 for setting an injection period of the first fuel injection valve at a compression step, and setting an injection period of the second fuel injection valve at an intake step of a part of the cylinders and setting at an exhaust step of the other cylinders.