Abstract: According to the present invention, limited electric power is consumed so as to achieve long-lasting use of electric power during brake control with the use of an auxiliary power supply source when there is a malfunction of a vehicle power supply source. In addition, a brake control device for ensuring responsiveness at the beginning of braking or when emergency braking is necessary is provided. The brake control device of the present invention is a brake control device for detecting electric signals generated depending on the degree of brake-pedal operation and calculating the driver's demanded braking force based on the electric signals so as to generate the demanded braking force, which comprises an auxiliary power supply source for supplying electric power to the brake control device when there is a malfunction of a vehicle power supply source and controls braking depending on the charged capacity of the auxiliary power supply source.

Abstract: A brake system which can secure quietness in a passenger compartment is provided. A vehicle brake system 1 includes a brake assist device 2 which boosts a pressing force on a brake pedal 5 by drive of a motor 31, and an assist control unit 6 which controls the motor 31. The assist control unit 6 changes responsiveness of the motor 31 in accordance with a vehicle speed, and sets a dead zone amount and a filtering value to large values in a region with a low vehicle speed. Thereby, responsiveness of a boosting operation of the motor 31 to the operation of the brake pedal is made low, and a rotational variation and a vibration are prevented from occurring to the motor 31 by a minute variation of a detection signal of a stroke sensor 14 during low-speed traveling or stoppage of traveling.

Abstract: Higher-order vibration is controlled in an event that an impact load such as an aircraft impact is applied to a nuclear plant. A higher-order vibration control device 1 is installed in a nuclear plant having a reactor containment vessel and a nuclear reactor building 3. The higher-order vibration control device 1 includes an impactor 1a, a housing 1b which receives the reaction force of the impactor 1a, and a locking mechanism 2. The impactor 1a is installed on a floor 31 of the nuclear plant so as to roll in a horizontal direction with respect to the floor 31. The housing 1b encloses the impactor 1a and guides rolling of the impactor 1a. The locking mechanism 2 restrains rolling of the impactor 1a. In the event that a flying object may possibly impact the nuclear plant, the locking of the locking mechanism 2 is released.

Abstract: Provided is a brake control apparatus for a vehicle which detects an amount of brake-pedal operation by means of an electric signal, and then calculates a braking force demanded by a driver from the electric signal, and thereby generates the demanded braking force. A control mode for a braking force is switched from a normal control mode to a stationary-vehicle control mode, if a determination that the vehicle is in a stationary state is followed by another determination that an electric signal corresponding to an actual braking force exceeds a command value for a stationary-vehicle braking force while the vehicle is in the stationary state. The control mode for a braking force is switched from the stationary-vehicle control mode to the normal control mode, if it is determined that the demanded braking force becomes smaller than the command value for the stationary-vehicle braking force.

Abstract: Disclosed is a brake control apparatus which includes a brake booster for augmenting deceleration, and which addresses the problem in conventional brake control apparatuses that deceleration and pedal reaction force depend on driver brake pedal input, and thus the pedal response and the ride comfort from the feeling of deceleration are affected by the manner in which the brake pedal is actuated by the driver. The brake control apparatus comprises a pedal reaction force generation unit for generating a pedal reaction force on the brake pedal, and a brake control unit for controlling the brake force in such a way as to suppress driver brake input fluctuations, wherein the pedal reaction force generation unit suppresses pedal reaction force fluctuations in accordance with specific deceleration and pedal reaction force characteristics.

Abstract: According to the present invention, limited electric power is consumed so as to achieve long-lasting use of electric power during brake control with the use of an auxiliary power supply source when there is a malfunction of a vehicle power supply source. In addition, a brake control device for ensuring responsivenss at the beginning of braking or when emergency braking is necessary is provided. The brake control device of the present invention is a brake control device for detecting electric signals generated depending on the degree of brake-pedal operation and calculating the driver's demanded braking force based on the electric signals so as to generate the demanded braking force, which comprises an auxiliary power supply source for supplying electric power to the brake control device when there is a malfunction of a vehicle power supply source and controls braking deppending on the charged capacity of the auxiliary power supply source.

Abstract: Disclosed is a brake control apparatus which includes a brake booster for augmenting deceleration, and which addresses the problem in conventional brake control apparatuses that deceleration and pedal reaction force depend on driver brake pedal input, and thus the pedal response and the ride comfort from the feeling of deceleration are affected by the manner in which the brake pedal is actuated by the driver. The brake control apparatus comprises a pedal reaction force generation unit for generating a pedal reaction force on the brake pedal, and a brake control unit for controlling the brake force in such a way as to suppress driver brake input fluctuations, wherein the pedal reaction force generation unit suppresses pedal reaction force fluctuations in accordance with specific deceleration and pedal reaction force characteristics.

Abstract: Fluctuations in a braking force and a deceleration during regenerative cooperative control are suppressed. A brake system includes a master pressure generating device 200, a wheel pressure generating device 300, and a regenerative braking device 18 that operate brake calipers 21a to 21d of respective brakes, and a brake control device 100 that control the actuators 200, 300, and 18. The brake control device 100 includes a braking force calculating unit 111 that determines a frictional braking force outputted at the brake calipers 21a to 21d and a regenerative braking force outputted by the regenerative braking device 18, and a communication control unit 112 that outputs braking force signals corresponding to the respective braking forces to the respective actuators 200, 300, and 18. The brake control device 100 controls the braking forces based on a pedal reaction force and a displacement amount of a piston that pressurizes a master cylinder.

Abstract: A brake system which can secure quietness in a passenger compartment is provided. A vehicle brake system 1 includes a brake assist device 2 which boosts a pressing force on a brake pedal 5 by drive of a motor 31, and an assist control unit 6 which controls the motor 31. The assist control unit 6 changes responsiveness of the motor 31 in accordance with a vehicle speed, and sets a dead zone amount and a filtering value to large values in a region with a low vehicle speed. Thereby, responsiveness of a boosting operation of the motor 31 to the operation of the brake pedal is made low, and a rotational variation and a vibration are prevented from occurring to the motor 31 by a minute variation of a detection signal of a stroke sensor 14 during low-speed traveling or stoppage of traveling.

Abstract: In order to reduce a steering torque during stoppage of a vehicle, according to the invention, opposite drive torques in normal and reverse directions are applied to a left rear wheel and a right rear wheel when a driver steers a steering wheel in a state where the vehicle stops, whereby a moment to turn the vehicle is generated, and an assist torque for steering the steering wheel is generated.

Abstract: In a power steering system comprising a power cylinder for assisting a steering power of a steering mechanism, a hydraulic pump for supplying a hydraulic pressure to the power cylinder, a first oil passage and a second oil passage connecting the power cylinder and the hydraulic pump respectively, a motor for driving the hydraulic pump, and power steering control means for calculating a command value to the motor based on the steering torque, a flow rate of the working oil supplied from a high-pressure side oil passage to a low-pressure side oil passage is restrained at the transition from the end of the steering state (lock end) of the steering mechanism to the returning. The flow-rate restraint increasingly corrects a driving current of the motor in the steering direction or limits the flow rate of the working oil.

Abstract: In a power steering system, the steering state of wheels is detected based on the steering speed to judge as to whether the steering state is in turning of the steering wheel or holding of steering speed is the steering wheels. At the time of the steering operation state, the control is executed so that a difference between a torque command value to an electric motor and the actual torque thereof will become smaller. Also, at the time of the holding operation state, the control is executed so that a difference between the revolution speed of the electric motor and a revolution-speed command value thereto will become smaller.

Abstract: There is provided a power steering system including an electric motor for generating a steering force in response to an command value, and a controller for generating the command value to the electric motor. Here, the controller generates the command value in correspondence with steering state of wheels, thereby controlling torque or rotation number of the electric motor.

Abstract: A brake controller for controlling a plurality of actuators for driving braking members of a plurality of brakes is disclosed, where the controller includes a performance setting unit for setting desired performance required of the brakes; a braking force calculating unit for calculating a desired braking force to be produced by each brake; a drive ratio calculating unit for calculating drive ratios at which the actuators operate to achieve the desired performance and to make the plurality of brakes produce a braking force equal to or nearly equal to the desired braking force; and a drive signal output unit for providing the actuators drive signals corresponding to the drive ratios for the actuators.

Abstract: In a power steering system comprising a power cylinder for assisting a steering power of a steering mechanism, a hydraulic pump for supplying a hydraulic pressure to the power cylinder, a first oil passage and a second oil passage connecting the power cylinder and the hydraulic pump respectively, a motor for driving the hydraulic pump, and power steering control means for calculating a command value to the motor based on the steering torque, a flow rate of the working oil supplied from a high-pressure side oil passage to a low-pressure side oil passage is restrained at the transition from the end of the steering state (lock end) of the steering mechanism to the returning. The flow-rate restraint increasingly corrects a driving current of the motor in the steering direction or limits the flow rate of the working oil.

Abstract: In a power steering system, the steering state of wheels is detected based on the steering speed to judge as to whether the steering state is in turning of the steering wheel or holding of steering speed is the steering wheels. At the time of the steering operation state, the control is executed so that a difference between a torque command value to an electric motor and the actual torque thereof will become smaller. Also, at the time of the holding operation state, the control is executed so that a difference between the revolution speed of the electric motor and a revolution-speed command value thereto will become smaller.

Abstract: Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the positions thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.

Abstract: In order to reduce a steering torque during stoppage of a vehicle, according to the invention, opposite drive torques in normal and reverse directions are applied to a left rear wheel and a right rear wheel when a driver steers a steering wheel in a state where the vehicle stops, whereby a moment to turn the vehicle is generated, and an assist torque for steering the steering wheel is generated.

Abstract: At an outlet portion of an injection hole (8) of a fuel injection valve (1), through removal of a part (A1, 7B) of a wall forming the injection hole (8), a restriction to a spray flow is released, thereby, a deflection spray is formed in which the spray is rich at the side of restriction released and is learn at the side of restricted, accordingly, ignition property of an internal combustion engine is improved, and an optimum spray is realized which reduces exhaust amount of unburnt gas components.

Abstract: An engine startup fuel control system for use with a four-cycle internal combustion engine of the type having a plurality of combustion chambers, an air intake passageway, a source of fuel, a crankshaft and a camshaft which operates the engine cylinder valves. A multipoint fuel injector is associated with each combustion chamber and each multipoint fuel injector has an inlet connected to the fuel source and an outlet connected to the air intake passageway adjacent its associated combustion chamber. A crankshaft position sensor generates an output signal representative of the angular position of the crankshaft while, similarly, a camshaft position sensor generates an output signal representative of the angular position of the camshaft. An engine control unit is programmed to determine the synchronization of the engine in response to the output signals from the crankshaft position sensor and camshaft position sensor.