Abstract: A power steering apparatus includes a steering shaft 10 including an input shaft 11, an intermediate shaft 13 connected through a first torsion bar 12 to the input shaft, and an output shaft 15 connected through a second torsion bar 14 to the intermediate shaft; a hollow motor 30 to provide a rotational force to the intermediate shaft; and a control device 60 including a microcomputer, and including an output shaft rotation angle presuming section 63 to presume an output shaft rotation angle ?g based on signals of an input shaft rotation angle ?h and an intermediate shaft rotation angle ?m, a torsion spring constant g1 and g2 of the first and second torsion bars; and a motor drive control section 69 to control the hollow motor based on the output shaft rotation angle.
Abstract: A power converter includes a power semiconductor module, a control circuit board, and a case. The power semiconductor module includes a switching element and a metal module case for forming a storage space to store the switching element. The case includes a resin case, a metal case, and a metal base. The resin case stores the power semiconductor module. The metal case stores the control circuit board. The metal base is disposed so as to separate a storage space of the resin case and a storage space of the metal case. The resin case forms a refrigerant flow channel. The metal base includes a first opening. The power semiconductor module is disposed such that the storage space of the module case and the storage space of the metal case are connected via the first opening of the metal base.
Abstract: A connection terminal is on a flange of a thermal flow meter. A terminal connection part has a first and a second bent part. The first bent part is bent from a first direction to a second direction. The second bent part has is bent from the first bent part to a third direction. The first and second bent parts are formed such that when connection pin parts of a plurality of the connection terminals and terminal connection parts of the plurality of connection terminals are projected onto a first imaginary plane, an imaginary line L extending along a first direction passing through the projection areas of each of the terminal connection parts of the plurality of connection terminals passes between the projection areas of the connection pin parts from among the connection pin parts of the plurality of connection terminals, that are positioned on both sides.
Abstract: When turning right (left) at an intersection and crossing an oncoming vehicle lane, this system makes it possible to avoid blocking travel of or colliding with a moving body moving in the oncoming vehicle lane due to stopping in the oncoming vehicle lane, and to avoid colliding with a moving body after crossing the oncoming vehicle lane. Given two or more moving bodies present in the advancement direction on the path of the local vehicle, the external environment is detected before the local vehicle intersects with the path of a first moving body, which will first intersect the local vehicle path; if at least two moving bodies are detected, i.e.
Abstract: A brake control device capable of suppressing a sense of discomfort felt by a driver. The brake control device (31) includes a braking command addition part (34A) for adding an automatic-brake braking command value (B) output from an automatic-brake braking command calculation part (32) and a pedal operation braking command value (A) output from a pedal operation braking command calculation part (34B). The pedal operation braking command calculation part includes a pedal operation braking command selection part (34B1), a normal brake characteristic part (34B2) for holding a normal brake characteristic, and an automatic brake characteristic part (34B3) for holding an automatic brake characteristic. The pedal operation braking command selection part selects a braking command value output from the automatic brake characteristic part when the automatic-brake braking command value is more than 0, and outputs the selection result to the braking command addition part as the pedal operation braking command value.
Abstract: An on-vehicle control device mounted on a vehicle and controlling traveling of the vehicle includes a vehicle position error specifying unit that estimates a position error of the vehicle, a travel control continuity information determination unit that determines information relating to continuity of a travel control state of the vehicle based on the position error of the vehicle estimated by the vehicle position error specifying unit, and a travel control continuity information output unit that outputs the information relating to the continuity of the travel control state of the vehicle determined by the travel control continuity information determination unit.
Abstract: There is provided a power converter which can suppress a surge voltage and reduce noise flowing from an input of a power changer. The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.
Abstract: To protect a switching element to be used in a boost circuit for an in-cylinder injection type internal combustion engine or the like from damage caused by overheating without using a temperature detection element. In a control circuit that switches a switching element between a conductive state and a non-conductive state, the switching element is controlled or a temperature of the switching element is estimated based on a potential difference between an input terminal and an output terminal of the switching element and a voltage applied to a control terminal of the switching element in the conductive state.
Abstract: Provided is a transmission control system that enables more precise control of the transmission ratio. This transmission control system is provided with a motor, an actuator, a transmission, a position sensor, a current sensor, and a control unit. The control unit includes: a drive unit that drives the motor while the vehicle is stopped; and a first estimation unit that estimates the initial transmission ratio, which indicates the transmission ratio when the ignition switch is turned on, on the basis of a rotation position detected by the position sensor, a load current detected by the current sensor, and a characteristic curve over a period during which the drive unit is operating.
January 29, 2016
Date of Patent:
April 9, 2019
Hitachi Automotive Systems, Ltd.
Hiroyuki Sakamoto, Hideki Sekiguchi, Fumihiro Ohsawa, Yuta Tanaka
Abstract: A cylinder apparatus is configured to compatibly achieve an increase in mechanical strength and a reduction in weight of a metal ring of an oil seal member used in the cylinder apparatus. A hydraulic shock absorber (1) as a cylinder apparatus has a rod guide (9) provided at one end (2A) thereof. An annular oil seal member (10) is provided closer to the one end (2A) than the rod guide (9) so as to face the rod guide (9). The oil seal member (10) is secured by staked portions (2C) of the outer tube (2) between the staked portions (2C) and the rod guide (9). The oil seal member (10) includes a metal ring (11) and a seal member (13). The metal ring (11) is provided with a plurality of radially extending ribs (12) by locally deforming the metal ring (11).
Abstract: An object is to suppress cavitation generated at a distal end portion of a seat face when a valve body and a seat portion collide with each other. In a relief valve of a fuel pump, an intersection between the seat face and a flow channel hole is formed at a position more distant than the seat portion formed of the valve body in a valve closing state and the seat face in order to suppress generation of cavitation bubbles when the valve body improves and releases high-pressure fuel.
Abstract: A system comprises: pump (hydraulic pressure source) that uses brake fluid supplied from reservoir tank (reservoir) to generate hydraulic pressure in first hydraulic line, thereby generating hydraulic pressure in wheel cylinder; piston configured to move axially in cylinder under the action of hydraulic fluid supplied from master cylinder, piston dividing cylinder into at least two chambers (positive pressure chamber and backpressure chamber); stroke simulator for generating reaction force to a driver's brake operation by moving piston; second hydraulic line provided between positive pressure chamber in stroke simulator and master cylinder; and third hydraulic chamber provided between backpressure chamber and first hydraulic chamber to transmit brake fluid from backpressure chamber to first hydraulic chamber.
Abstract: An object of the present invention is to provide a rotational angle detection apparatus and a power steering apparatus capable of detecting a rotational angle of a rotational shaft eve when a failure has occurred in a magnetic detection portion. One aspect of the present invention is a rotational angle detection apparatus including a first magnetic detection portion provided on a rotational axis and configured to detect a change in a magnitude or a direction of a magnetic field, and a second magnetic detection portion provided on the rotational axis and disposed at a position offset from the first magnetic detection portion in a direction along the rotational axis. The second magnetic detection portion is configured to detect the change in the magnitude or the direction of the magnetic field.
Abstract: A motor control device avoids the difficulties associated with safely controlling a motor using a second calculation unit when a first calculation unit malfunctions. A motor control device monitors a malfunction of a first microcomputer and a malfunction of a first CPU of the first microcomputer and performs a determination based on a result of a second external communication functional unit. When the determination is normal, the process proceeds determine that the first CPU is normal and a second CPU malfunctions. Therefore, it is possible to continue processing using the first CPU in this case.
Abstract: The present invention addresses the problem of attaining an object recognition device that can change control of a vehicle in accordance with the reliability of detection of a target object. The object recognition device according to the present invention recognizes a target object around a vehicle and includes: a distance-information-based target object determination unit 106 that determines whether or not an object 303 is a target object by using distance information from the vehicle 301 to the object 303; an image-information-based target object determination unit 107 that determines whether or not the object 303 is a target object by using image information obtained by capturing an image of the object 303 from the vehicle 301; and a target object detection reliability calculation unit 108 that calculates the reliability of detection of a target object by using the distance information and the image information.
Abstract: A semiconductor device includes a metal body; a bonding layer placed on the metal body; and a semiconductor chip placed on the bonding layer. The bonding layer includes a filler-containing first layer formed between the metal body and the semiconductor chip and a second layer bonded to the first layer and the semiconductor chip. The second layer has a thermal expansion coefficient higher than that of the first layer.
Abstract: A piston manufacturing device includes a first forming device (42) configured to form an annular groove (61) in a piston (11), and a second forming device (52) configured to press an edge (15) of an opening (14) of the piston (11) toward other end side in an axial direction of the piston (11) and to form a thick section (65) extruded from an inner circumferential surface (12b) arranged between the edge (15) and the groove (61) toward an axial center side of the piston (11), wherein a recessed section (53) is formed at a portion of the second forming device (52) that is arranged to abut the edge (15) so that an inner circumferential side of the edge (15) is plastically deformed toward the other end side in an axial direction of the piston (11).
Abstract: A stress mitigation region is formed in which a predetermined number of stress mitigation holes penetrating through a wiring are disposed is formed in a proximity of a bonding portion of an electronic component via which the electronic component is bonded to the wiring with an electrically conductive bonding agent. Accordingly, even if a stress is generated in the wiring due to a heat, the stress mitigation holes are deformed so that the stress acted upon the electrically conductive bonding agent becomes small and a generation of cracks in the electrically conductive bonding agent can be suppressed. In addition, the stress mitigation holes are made circular so that concentrations of a current and the stress can be reduced and the generation of the cracks in the wiring can be suppressed.
Abstract: An object of the present invention is to realize a feedback control apparatus and an electrically driven power steering apparatus capable of safely continuing control operation even in the event of the occurrence of a soft error. A controller 202 of the present invention determines a d-axis target voltage Vd and a q-axis target voltage Vq, which are control values for controlling an output value of the electrically driven power steering apparatus on the basis of a d-axis error signal ?Id and a q-axis error signal ?Iq, which are input values. In this processing, in a period before the occurrence of the soft error, the controller 202 determines the d-axis target voltage Vd and the q-axis target voltage Vq by means of PID control that uses a current input value and a past input value. In a period after the occurrence of the soft error, the d-axis target voltage Vd and the q-axis target voltage Vq are determined by means of P control that uses a current input value but does not use a past input value.
Abstract: The purpose of the present invention is to provide a fuel injection valve control device with which variability in the injection amount with respect to drive pulse width can be kept to a satisfactory level in each of a plurality of fuel injection devices. The present invention provides a fuel injection valve control device for controlling a plurality of fuel injection devices each equipped with a valve body and a solenoid for opening the valve body, characterized in that the device is configured such that, a prescribed time after voltage has been applied to the solenoid, a holding current is applied, the prescribed time and the holding current being corrected for each of the fuel injection devices, on the basis of the operating characteristics of the fuel injection device.