Abstract: A power control unit for electric vehicle includes an inverter for controlling a voltage supplied to a vehicle driving motor from a high-voltage battery. A DC/DC converter reduces the voltage of the high-voltage battery to a voltage capable of charging a low-voltage battery serving as a power supply for an in-vehicle auxiliary machine. The power control unit has a circuit board including first electrical circuit elements that constitute the inverter or the DC/DC converter and second electrical circuit elements together with the first electrical circuit elements. The unit further comprises a heat sink for cooling the first electrical circuit elements, a water pump for circulating a refrigerant in a refrigerant passage of the heat sink, and a water pump control circuit for controlling the operation of the water pump.

Abstract: A leakage detector for a fuel vapor processing system includes a pressure sensor and a control unit. The pressure sensor is configured to measure an internal pressure of the fuel vapor processing system. The control unit is configured to calculate changes of a fuel vapor pressure from a saturation vapor pressure curve of the fuel vapor, a fuel vapor concentration of the fuel vapor in a gaseous layer within the fuel vapor processing system, and a convective velocity in the gaseous layer, to correct a reference pressure for leakage detection based on the changes of the fuel vapor pressure so as to calculate a corrected reference pressure, and to compare the internal pressure measured by the first pressure sensor to the corrected reference pressure so as to determine whether any of the fuel vapor has leaked from the fuel vapor processing system.

Abstract: A throttle device includes a coil spring that has a first spring part, a second spring part, and an intermediate hook connecting the first spring part to the second spring part for biasing a throttle valve. The first spring part is engaged with a rotation member coupled to a throttle shaft. The second spring part is engaged with a throttle body. The intermediate hook is configured to engage with a first stopper formed on the rotation member and a second stopper formed on the throttle body. The intermediate hook includes a first part on the first spring part side and a second part on the second spring part side. When the intermediate hook is engaged with the first stopper or the second stopper, the first part abuts on the first stopper or the second stopper.

Abstract: A relief valve includes: a housing having a hollow cylindrical valve chamber and having a first communication port opening on one end side of the valve chamber; a first valve element for opening and closing the first communication port; a first spring for biasing the first valve element in the closing direction; and a retainer having a spring seat for supporting the first spring. A set load of the first spring is adjusted based on the press-fit amount of the retainer with respect to the housing. A press-fit piece member including a plurality of press-fit pieces is formed in the retainer, such that the press-fit pieces of the press-fit member are arranged to be spaced away from each other in the circumferential direction of the retainer and elastically abut the housing.

Abstract: A deterioration estimator for an electronic throttle device allows a throttle valve to be driven by a drive mechanism. The throttle valve is continuously operated to open and/or close. If operated to open, it opens from a first opening position, which is on a closed side from an opener opening position and in which the throttle valve is biased to an open side by an opener mechanism, to a second opening position, the second opening position being on an open side from the opener opening position with the throttle valve being biased to the closed side by the opener mechanism. If operated to close, the throttle valve is operated to close from the second opening position to the first opening position. A deteriorated condition of the electronic throttle device is estimated by detecting a behavior of the drive mechanism when the throttle valve passes by the opener opening position.

Abstract: A valve system includes a tank, a valve member, a driving device configured to move the valve member for opening and closing the tank, and a control unit. The circuit of the control unit is programmed to move the valve member in the open direction after beginning of a process, and then reverse a direction of movement of the valve member to a standby position in a valve closed state. If the first rate of pressure change in the internal pressure of the tank since the cycle began is greater than a target rate of change, the circuit determines a waiting time such that a second rate of pressure change of the internal pressure from the start to the end of the cycle is equal to the target rate of change, and then keeps the driving device in the standby position until the determined waiting time has elapsed.

Abstract: A valve system that can quickly estimate the valve opening position including a tank to store fluid, a pressure sensor having a valve element to detect an internal pressure of the tank, a valve to open and close the tank, a driving device to stroke the valve element of the valve, and a control unit.

Abstract: A pump unit may include a pump configured to increase a pressure of diesel fuel and discharge the diesel fuel to a fuel passage in which a filter is disposed, and a controller configured to control an operation of the pump. The controller may be configured to execute freeze avoidance control in which the operation of the pump is controlled using an index that indicates a degree of clogging of the filter caused by the diesel fuel freezing. In the freeze avoidance control, the controller may be configured to apply a higher load to the pump as the degree of clogging of the filter indicated by the index is higher.

Abstract: A passage switching device to switch flow passages includes a rotary disk and a fixed disk which are stacked in an axial direction. The rotary disk is provided with at least one rotary disk communication path penetrating in the axial direction, and the fixed disk is provided with a plurality of fixed disk communication paths penetrating in the axial direction. The flow passages are switched by rotating and driving the rotary disk to switch combination of the rotary disk communication path and the fixed disk communication path for communication. There is provided an elastic member between the housing and the rotary disk, between the rotary disk and the fixed disk, and between the fixed disk and the housing with respect to the axial direction.

Abstract: A poppet-type EGR valve includes: a housing that includes a flow passage; a valve seat; a valve body allowed to be seated on the valve seat; a valve shaft on which the valve body is provided at one end section thereof; and a drive unit reciprocally driving the valve shaft. The flow passage has an inlet and an outlet and includes a bent passage portion that is bent downstream from the valve seat in a direction perpendicular to the direction toward the inlet. The bent passage portion includes at least one of a section in which the passage area is constant and a section in which the passage area increases toward the downstream direction, and does not include a section in which the passage area decreases toward the downstream direction. In the section in which the passage area increases toward the downstream direction, the passage area changes gradually.

Abstract: When the duty command value is less than or equal to a threshold value, the motor control device performs the complementary PWM control, and when the duty command value is greater than the threshold value, it sets, for the first element, a first period in which the first element remains turned on and a second period in which control is performed with a corrected duty cycle to turn off the first element for a longer period, and performs average PWM control of which average duty cycle in a total period of the first and second periods is same as a set duty cycle. The motor control device turns on the second element while the first element is turned off in the second period.

Abstract: An ejector having a nozzle for jetting a hydrogen gas (working fluid), wherein the nozzle includes an inner nozzle and an outer nozzle, both the nozzles are disposed to encompass an axis of a diffuser, an axis of the inner nozzle or an axis of the outer nozzle is arranged to align with the axis, an inner jet hole through which the hydrogen gas flows is formed in the inner nozzle, an outer jet hole having a ring-shaped cross section through which the hydrogen gas flows is provided between the inner nozzle and the outer nozzle, the outer jet hole when a main body casing is horizontally disposed includes an upper hole portion above the axis and a lower hole portion under the axis, and the inner nozzle and the outer nozzle are mutually eccentrically disposed so that the lower hole portion is narrower than the upper hole portion.

Abstract: A throttle device includes a rotating member coupled to a throttle shaft and rotated by a drive source, and a coil spring interposed between a throttle body and the rotating member and configured to bias the throttle valve toward a default position. The coil spring has a first spring portion, a second spring portion, and an intermediate hook portion for connecting the first spring portion and the second spring portion. The rotating member includes an inner periphery supporting portion that supports an inner peripheral side of the first spring portion, an outer periphery supporting portion that supports an outer peripheral side of the first spring portion, and a blocking structure for preventing the first spring portion from being fitted to an outside of the outer periphery supporting portion when assembling the coil spring.

Abstract: A fuel-feeding device may include a fuel tank storing fuel therein, a fuel pump configured to feed the fuel in the fuel tank to an engine through a fuel-feeding conduit, an aspirator configured to generate a negative pressure therein using a flow of the fuel flowing through a branched conduit branched from the fuel-feeding conduit, a negative pressure sensor configured to detect the negative pressure generated by the aspirator, and a control device configured to control a revolution speed of the fuel pump. The control device is configured to determine a sign of vapor generation in the fuel stored in the fuel tank based on detection information of the negative pressure sensor.

Abstract: A battery temperature adjusting device includes a battery pack, a heat-exchange part for exchanging heat between the battery pack and a heat medium, and a heat medium circuit for flowing the heat medium to the heat-exchange part to adjust the temperature of the battery pack by flowing the heat medium to the heat-exchange part through the heat medium circuit to exchange heat with the battery pack. The heat medium circuit includes a warming circuit for flowing a warming medium to the heat-exchange part to warm the battery pack, and a cooling circuit for flowing a cooling medium to the heat-exchange part to cool the battery pack. The battery temperature adjusting device further includes a circuit switching unit switches between the circuits to connect the warming circuit to the heat-exchange part in warming the battery pack or to connect the cooling circuit to the heat-exchange part in cooling the battery pack.

Abstract: An ejector includes an inner nozzle, an outer nozzle internally provided with the inner nozzle, and an outer injection port between the inner nozzle and the outer nozzle. The ejector is operated to suck a target fluid by negative pressure generated by a working fluid injected from the inside of the inner nozzle or/and the outer injection port, and discharge the target fluid merged with the working fluid. The ejector further includes a nozzle guide placed in the gap between the inner nozzle and the outer nozzle and configured to restrict the interval of the outer injection port.

Abstract: A leakage detector includes a pressure sensor for detecting the pressure in a detecting target area of the fuel vapor treatment system and a controller. The controller measures the pressure in the detecting target area at a certain point in time. The controller then determines whether the measured pressure satisfies a condition for leakage detection by a vapor pressure device. When the controller determines that the condition is satisfied, the controller selects the vapor pressure device. When the controller determines that the condition is not satisfied, the controller predicts the change in vapor pressure at a subsequent temperature based on a saturated vapor pressure characteristic of the fuel. If it is determined the pressure in the detecting target will satisfy a predetermined condition, the controller selects a pressure application device. If it is determined that the predetermined condition will be satisfied, the controller selects the vapor pressure device.

Abstract: An evaporated fuel treatment apparatus includes an electrically-operated valve disposed between a full tank control valve and an atmosphere open port and a control unit that controls the electrically-operated valve, and the control unit performs valve-closing control that fully closes the electrically-operated valve when a valve-closing condition is satisfied after the start of fuel supply, in which a value measured by a fuel volume measurement unit is equal to or greater than a first predetermined value determined in advance and a value detected by a pressure sensor is equal to or greater than a second predetermined value determined in advance.

Abstract: A method of producing a throttle device includes setting an angle between a fully closed position and a default position to a predetermined angle by processing at least one of a gear-side fully closed position stopper on a throttle gear, a body-side fully closed position stopper on a throttle body, a default position defining member, a body-side engaging portion of the throttle body, or a gear-side engaging portion of the throttle gear.

Abstract: A fuel supply apparatus to be mounted in a vehicle includes an injector, a rear delivery pipe and a front delivery pipe connected to the injector, and a fixed flange that is provided in the rear delivery pipe to fix the rear delivery pipe to a PCU. The fixed flange includes a cutout.