Abstract: Static leakage is suppressed in a sealing device, where a sealing lip slidably makes contacts with a sealing flange, in which a thread groove exhibits fluid pumping action during rotation. Sealing device performs sealing between a housing and a rotating shaft inserted into a shaft hole in the housing to prevent sealed fluid on a machine inner side from leaking to an outer side. A sealing lip mounted on an inner periphery of the shaft hole slidably makes contact with the sealing flange mounted on an outer periphery of the rotating shaft. The thread groove intersects an edge of the sealing lip. An inner peripheral tube portion is provided on an attachment ring that holds the sealing lip. An inner peripheral lip that slidably makes contact with the inner peripheral tube portion is provided on the sealing flange side on the inner peripheral side of the thread groove.

Abstract: Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit.

Abstract: Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit.

Abstract: A sensorless-brushless motor control device comprises an inverter, an inverter drive circuit that drives the inverter and a current control part that controls the inverter drive circuit according to a current command from a superior control part and includes a first order lag compensating part. The device is characterized by further comprising a control mode changeover judging part that judges changeover of a control gain of the current control part after startup of the sensorless-brushless motor in response to a motor revolution sensing signal from the inverter drive circuit and a control mode changeover part that changes over the control gain of the current control part in response to an output of the control mode changeover judging part.

Abstract: Factors affecting the response time of a transfer system from the combustion of injected fuel to the detection of its oxygen concentration include a stroke delay time due to an engine speed, the dependence of an LAF sensor response time on an exhaust gas flow rate, a response time change of the LAF sensor due to its deterioration with time, and the like. If a hyperplane of the sliding mode is fixed without considering the above-mentioned factors affecting the response time of the transfer system, an overshoot or oscillation of a feedback system may occur at low speeds of the engine even if preferable feedback responsiveness can be achieved, for example, at high speeds of the engine. This results in aggravated exhaust emissions, degraded drivability due to torque fluctuations, and fluctuations in idle speed.

Abstract: The invention improves a combustion at a starting time by refining a fuel at a time of starting the engine so as to minimize an amount of the fuel attached to a wall surface and appropriately form an air-fuel mixture. When the engine starts, a control apparatus executes a control of increasing a fuel pressure supplied to a fuel injector in comparison with a normal operating time just after the engine start, and a divisional injection control of divisionally injecting the fuel injection for one cycle of the engine by the fuel injector at a plurality of times.

Abstract: The invention improves a combustion at a starting time by refining a fuel at a time of starting the engine so as to minimize an amount of the fuel attached to a wall surface and appropriately form an air-fuel mixture. When the engine starts, a control apparatus executes a control of increasing a fuel pressure supplied to a fuel injector in comparison with a normal operating time just after the engine start, and a divisional injection control of divisionally injecting the fuel injection for one cycle of the engine by the fuel injector at a plurality of times.

Abstract: In an apparatus for controlling an automatic transmission which is provided with a torque converter having a fluid coupling unit for coupling driving force to a transmission through fluid coupling and a direct coupling unit for coupling the driving force to the transmission through mechanical coupling and being operative to take a fluid coupling state, a direct coupling state or an intermediate state between the fluid and direct coupling states in accordance with a working pressure applied to the direct coupling unit, a control signal is generated for changing the initial value of the working pressure in accordance with the driving force during the period of transition between the fluid coupling state and the direct coupling state.

Abstract: In an apparatus for controlling an automatic transmission which is provided with a torque converter having a fluid coupling unit for coupling driving force to a transmission through fluid coupling and a direct coupling unit for coupling the driving force to the transmission through mechanical coupling and being operative to take a fluid coupling state, a direct coupling state or an intermediate state between the fluid and direct coupling states in accordance with a working pressure applied to the direct coupling unit, a control signal is generated for changing the initial value of the working pressure in accordance with the driving force during the period of transition between the fluid coupling state and the direct coupling state.

Abstract: A control unit and a control method of an automatic transmission can accurately estimate an output shaft torque in a torque converter with little error. The control unit of the automatic transmission estimates an output shaft torque in a torque converter with using a characteristic of the torque converter and controls the automatic transmission by using the estimated torque converter output shaft torque. At lest one of a pump capacity characteristic and a torque ration characteristic of the torque converter is corrected in the control unit by using an oil temperature of the automatic transmission and at least one of parameters expressing an operating state, thereby estimating the torque converter output shaft torque.

Abstract: In an apparatus for controlling an automatic transmission which is provided with a torque converter having a fluid coupling unit for coupling driving force to a transmission through fluid coupling and a direct coupling unit for coupling the driving force to the transmission through mechanical coupling and being operative to take a fluid coupling state, a direct coupling state or an intermediate state between the fluid and direct coupling states in accordance with a working pressure applied to the direct coupling unit, a control signal is generated for changing the initial value of the working pressure in accordance with the driving force during the period of transition between the fluid coupling state and the direct coupling state.

Abstract: A control apparatus of automatic transmission controls by oil pressure at least one clutch of an automatic transmission connected to an engine output to be engaged or disengaged to make gear shifting. In this control apparatus, the output torque of the engine is calculated on the basis of a parameter representative of a load of the engine and the engine speed. In addition, a transfer torque necessary for the clutch is calculated by use of at least the calculated engine output torque and the engine speed. Then, a command value of oil pressure acted on the clutch is determined by the calculated transfer torque.

Abstract: A transmission torque of a friction part during a shift is requested in accordance with an input rotation speed and an input torque of the friction part of an automatic transmission and a target torque during the shift determines. An output torque of an engine is reduced in accordance with a difference between the transmission torque and the target torque. A control transmission torque supplied to the friction part is determined in accordance with the torque difference and the transmission torque, thereby an operation force to the friction part is determined and the operation force is supplied to the friction part. A control apparatus and method for the automatic transmission is provided wherein a stable shift time can obtain and a shift shock can be suppressed.