Abstract: In an internal combustion engine provided with a variable valve operating apparatus which variably changes a valve operating characteristic of at least one of intake and exhaust valves, a reference intake pipe pressure and a reference fresh air ratio corresponding to a reference operating condition of the variable valve operating apparatus are computed based on the detection value of the engine operating condition, a fresh air ratio correction amount corresponding to an operating condition of the variable valve operating apparatus is computed based on the detection value of the intake pipe pressure and the reference intake pipe pressure, the reference fresh air ratio is corrected based on the computed fresh air ratio correction amount to compute a final fresh air ratio, and an operating amount of the control object in the internal combustion engine is computed based on the final fresh air ratio to operate the control object.

Abstract: A swing cam to actuate engine valves is rotatably disposed about a drive shaft. A first eccentric cam is tightly disposed on the drive shaft. A ring-link is rotatably disposed on the first eccentric cam. A second eccentric cam is tightly disposed on a control shaft which rotates to a given angular position in accordance with an operation condition of an associated internal combustion engine. A rocker arm is rotatably disposed on the second eccentric cam. A rod-link extends between the rocker arm and the swing cam. A first connecting pin pivotally connects a first arm portion of the rocker arm with the ring-link. A second connecting pin pivotally connects a second arm portion of the rocker arm with an end of the rod-link. A third connecting pin pivotally connects the other end of the rod-link with the swing cam. The first connecting pin is fixed to either one of the first arm portion of the rocker arm and the ring-link.

Abstract: A viscous fluid coupling includes a housing rotatably supported to a drive shaft of an engine. An operation plate set in the housing divides a space of the housing into a reservoir and an operation chamber. The operation plate has a communication hole communicating the reservoir and the operation chamber. A rotor fixed to the drive shaft is disposed in the operation chamber. A valve mechanism installed to the operation plate to close and open the communication hole according to ambient temperature of the housing. A driven wheel fixed to the housing is located between the operation plate and the rotor. A torque transmitting section includes a first annular projection concentrically formed on the driven wheel and a plurality of second annular projections concentrically formed on the rotor. The first annular projections are overlappedly adjacent to the second annular projections so as to establish fluid coupling therebetween through the viscous fluid.

Abstract: In an antiskid brake control system, an ECU estimates a wheel slip in accordance with a sensed wheel speed and controls a fluid pressure control valve for braking operation in accordance with the estimated wheel slip for an antiskid brake control, the fluid pressure being reduced when the wheel slip is enlarged and being increased when the wheel slip is lowered. When a vehicle-body speed is smaller than a predetermined quick pressure reduction prohibiting speed, the ECU performs a quick pressure reduction prohibiting control to restrain a quick pressure reduction having a greater reduction amount than a predetermined reduction amount.

Abstract: When a racing of engine occurred during a speed change, an oil pressure is forcibly supplied to a friction engagement element to be released, and a back pressure of an accumulator disposed in an oil supply pipe of this friction engagement element of release side is increased in stepwise.

Abstract: In an engine equipped with a variable valve timing mechanism that variably controls the valve timing successively, when variably controlling the valve timing, a transient correction amount of fuel supplied to the engine is corrected based on the detection value of the valve overlap amount of the intake/exhaust valves.

Abstract: In a system in which an oxygen quantity stored in a catalytic converter is estimated to feedback control a fuel injection quantity based on the estimated oxygen quantity, when a predetermined period of time has not yet passed from an occurrence of misfire and from the end of misfire, the update of the oxygen quantity is suspended, and also, when the predetermined period of time has not yet passed from the end of misfire, the fuel injection quantity is decreasingly corrected and the oxygen quantity is reset after the predetermined period of time has passed.

Abstract: A fluid flow meter is disposed in a conduit. A casing of the flow meter includes a main body section defining a circuit board installation recess, and has a peripheral wall section projecting from the main body section so as to surround the circuit board installation recess. A part of the peripheral wall section is cut out to form an installation plate insertion groove. A silicon-containing filler is disposed in the board installation recess of the casing to cover the circuit board. A fluorine-containing sealant is disposed in the board installation recess close to the installation plate insertion groove so as to seal the installation plate insertion groove and maintain the silicon-containing filler inside the board installation recess.

Abstract: In an antiskid brake control system, an ECU is constructed to calculate a pseudo vehicle-body speed in accordance with a sensed wheel speed, calculate a target wheel speed in view of a predetermined slip ratio obtained in accordance with a calculated pseudo vehicle-body speed, carry out pressure reducing control by reducing the fluid pressure within a hydraulic unit when the sensed wheel speed is smaller than the calculated target wheel speed, estimate an amount of fluid stored in a reservoir, and correct the target wheel speed to lessen the slip ratio when the estimated fluid amount is greater than a predetermined value.

Abstract: In a transmission system for an automotive vehicle, a planetary gear (3) comprises a ring gear (33) fixed to a housing, the planetary gear being interposed between a drive axle (1) in which a torque is transmitted from a power source (EG) of the vehicle and an output axle (2) via which the transmitted torque is outputted, a first clutch (A-C/L) is interposed between a carrier (32) of the planetary gear and the drive axle (1), a second clutch (B-C/L) is interposed between the carrier (32) of the planetary gear and the output axle (2), and a third clutch (C-C/L) is interposed between a sun gear (31) of the planetary gear and the drive axle (1).

Abstract: An inhalator including an inhalator body including a powder receiving chamber for receiving a powder, an air-powder mixture reservoir for temporarily storing an air-powder mixture flowing from the powder receiving chamber, and a diluent air passage for introducing a diluent air into the air-powder mixture reservoir. The air-powder mixture is formed within the powder receiving chamber when an air is introduced into the powder receiving chamber. The air-powder mixture within the air-powder mixture reservoir is admixed with a diluent air introduced thereinto through the diluent air passage. The diluted air-powder mixture is discharged from an air-powder mixture outlet into a user's oral or nasal cavity. A powder composition for inhalators includes at least two kinds of fine particles different in particle diameter.

Abstract: A drive shaft for transmitting an engine revolution to a rear axle of a motor vehicle comprises, a first shaft comprising a first yoke fixed to an end of the first shaft, a second shaft comprising a second yoke fixed to an end of the second shaft. The second yoke being made of a metal plate by press-forming. A coupling is provided between the first yoke and the second yoke, the coupling having a high-rigidity in a rotating direction of the drive shaft and having an elasticity in an axial direction of the drive shaft.

Abstract: In a cylinder discrimination device in an engine, a crank angle signal is output for each unit crank angle in synchronization with the rotation of a crankshaft in the engine, different numbers of cylinder discrimination signals are output corresponding to cylinders to be discriminated during a predetermined crank angle period, and a count value of the crank angle signals to be output after a cranking start is held each time the cylinder discrimination signal is output. By comparing the count value of the number of the crank angle signal outputs at a first cylinder discrimination timing with the past count values, to detect the number of the cylinder discrimination signals output during the predetermined crank angle period, and first cylinder discrimination after the cranking start is performed based on the number of the detected cylinder discrimination signals.

Abstract: A valve timing control system includes a driving plate coupled to a crankshaft, a lever shaft coupled to a camshaft, a VTC housing, and an electromagnetic coil mounted to the VTC housing for producing a magnetic field to control a mounting angle formed between the driving plate and the lever shaft. The electromagnetic coil has rotation restricted and axial displacement allowed by the VTC housing, and is engaged with the lever shaft to enable rotation with respect thereto and axial displacement together therewith.

Abstract: In a variable valve mechanism that changes an opening characteristic of an engine valve by a rotation force of a direct current motor, an electric current to be supplied to the direct current motor is forcibly lowered by providing restriction to a control signal of a power transistor that supplies the electric current to the direct current motor, or providing restriction to a change speed of target value of the opening characteristic, when an engine temperature is high.

Abstract: In a negative pressure actuator which is provided with a negative pressure tank storing an intake negative pressure of an engine, and operated by a negative pressure stored in said negative pressure tank as a power source, an operating possible time of the negative pressure actuator is calculated based on an intake negative pressure, the operation of the negative pressure actuator is permitted when it is within the operating possible time, while the operation of the negative pressure actuator is prohibited when it is over the operating possible time.

Abstract: An oil pressure control apparatus for an internal combustion engine that has a source of hydraulic pressure and a hydraulic actuator which is actuated by hydraulic pressure provided via a fluid passage which is in communication with the source of hydraulic pressure. A control valve is disposed in the fluid passage for controlling the hydraulic pressure introduced to the actuator. A damper, which is disposed in a fluid communication between the hydraulic actuator and the control valve, is operative to attenuate the force of a pulsing stream of a working fluid in the fluid passage.

Abstract: In a variable valve timing apparatus for variably controlling the valve timing by changing a rotation phase of a camshaft with respect to a crankshaft, an abnormality diagnosis of the apparatus is performed on a condition that a change amount per unit time in a control target value of the rotation phase has been kept equal to or less than a predetermined limit value for a predetermined period or more.

Abstract: An anti-skid control system for an automotive vehicle includes a hydraulic modulator having electromagnetic solenoid valves for regulating a wheel-brake cylinder pressure at each of road wheels. A skid control unit prevents a wheel lock-up condition by controlling the wheel-brake cylinder pressure via on/off reaction of the solenoid valves in response to a pulse signal based on a wheel speed detected by a wheel speed sensor. The skid control unit has a data processing section that generates a desired wheel speed based on the wheel speed, calculates a desired brake-fluid pressure based on an integrated value of a wheel-speed deviation between the desired wheel speed and the wheel speed, sets a controlled ON pulse width based on the desired brake-fluid pressure, and outputting the pulse signal having the controlled pulse width to the solenoid valves after a lapse of a preset pulse width from a previous pulse signal output.

Abstract: An intake air quantity detected by an air flow meter is corrected based on a change speed of an engine load and on a change speed of an engine rotation speed, and an oxygen quantity stored in a catalytic converter is estimated based on the corrected intake air quantity and an oxygen concentration in the exhaust gas.