Abstract: Provided is a vehicle driving support system that achieves a balance between accurately evaluating the path cost of a candidate path and reducing the load of calculating the path cost. A vehicle driving support system includes a controller that sets a target path on a travel road based on travel road information. The controller sets, in the vicinity of an obstacle, a warning area with an outer shape according to the obstacle, and sampling points at first intervals along a part of the candidate path that is included in the warning area, and sets the sampling points at second intervals, longer than the first interval, along the other part of the candidate path.
Abstract: An automatic transmission is provided with a friction engaging element having a hub member, a drum member, friction plates disposed between the hub member and the drum member, and a piston configured to engage the friction plates. The hub member includes a first hub member made of ferrous material and having a cylindrical part provided with a spline part, the friction plates being spline-engaged with the spline part, and a second hub member made of aluminum-based material, disposed at a side part of the first hub member, and having a feed part for lubrication provided with a supply oil channel configured to supply hydraulic fluid for lubrication to the friction plates. A notch for lubrication is formed by circumferentially cutting the cylindrical part of the first hub member corresponding to the feed part of the second hub member. The feed part supplies the hydraulic fluid for lubrication through the notch.
Abstract: A control device for a compression autoignition engine includes an engine, a state quantity setting device, a spark plug, a controller, and a sensor. The spark plug receives a control signal from the controller and ignites air-fuel mixture at predetermined ignition timing such that the ignited air-fuel mixture is combusted by flame propagation and then unburned air-fuel mixture in a combustion chamber is combusted by autoignition. The controller outputs a control signal to an injector such that preceding injection and succeeding injection are performed in a compression stroke.
Abstract: An automatic transmission according to one aspect of the present invention includes: a transmission mechanism including a rotational element; a valve body configured to control the transmission mechanism; an electronic control unit configured to perform electronic control of the valve body; and a transmission casing in which the transmission mechanism, the valve body, and the electronic control unit are arranged. The electronic control unit is formed such that an inner peripheral surface of the electronic control unit extends in a circumferential direction along an outer peripheral surface of the transmission mechanism.
Abstract: The present disclosure aims to stabilize, in an engine with a supercharger, a detection result of an intake air temperature sensor interposed between the supercharger and an intercooler. A gas outlet of a supercharger and a gas inlet of an intercooler are connected together via a second passage. The second passage includes, in its middle position, a narrow region with a smaller cross-sectional area than the part of the second passage extending from an upstream end of the second passage to the middle position. The narrow region is provided with the intake air temperature sensor configured to detect the gas temperature in the narrow region.
Abstract: A torsion beam type of rear suspension comprising a pair of right-and-left trailing arms and a torsion beam connecting the trailing arms is provided. A floor under cover for airflow straightening is attached to a portion of a vehicle body in front of the rear suspension so as to cover a vehicle-body lower face. A arm cover is attached to a lower portion of the trailing arm so as to cover a lower face of the trailing arm. The arm cover is provided with an arm-cover enlarged portion which is configured to protrude outwardly, in a vehicle width direction, from the trailing arm in a vehicle bottom-face view. The floor under cover is provided with a floor-under-cover enlarged portion such that a rear end portion of the floor under cover faces closely to a front edge of the arm-cover enlarged portion.
Abstract: A switching circuit includes: an input/output terminal section including four SW terminals; lines connecting between these terminals; switches disposed in paths of the respective lines; and diodes disposed in the paths of the respective lines. The switches are single-pole switches. The diodes are connected to normally closed terminals of the switches, respectively.
October 25, 2017
Date of Patent:
September 29, 2020
Mazda Motor Corporation
Jun Haruki, Shigeyuki Uehara, Taiki Kado
Abstract: The number of advance chambers is larger than the number of retard chambers in an intake variable valve timing (VVT), whereas the number of retard chambers is larger than the number of advance chambers in an exhaust VVT. Accordingly, with limitation of an oil pressure that can be used by the VVTs, a pumping loss in a transition period in which a valve overlap amount is changed by advancing or retarding a valve timing can be reduced.
Abstract: In a predetermined operating region, a fuel injection valve executes a second injection to inject fuel into a cylinder in a compression stroke, and a first injection to inject fuel into the cylinder 2 in the compression stroke or an intake stroke before the second injection. When a purge is executed, the total quantity of fuel to be injected by the fuel injection valve into the cylinder is reduced more than when the purge is not executed, and a fuel reduction quantity of the second injection is made smaller than a fuel reduction quantity of the first injection.
Abstract: A vehicle underbody structure includes a catalyst disposed in a front portion of an exhaust pipe; a cover member for covering the catalyst from above; and a heat insulator disposed inside a tunnel portion behind the catalyst and configured to cover the exhaust pipe from above. The heat insulator is disposed away from the tunnel portion by a predetermined gap in an up-down direction. A front portion of the heat insulator and a rear portion of the cover member are disposed in such a way as to overlap each other. A front end of the heat insulator is disposed on the upper side with respect to a rear end of the cover member.
Abstract: A device that estimates the residual capacity of a lithium ion battery (3) that starts an engine starter (1), includes a control section (30) that calculates resistance values of a cathode and anode of the lithium ion battery based on detected values of a voltage sensor (SN1) and a current sensor (SN2) at the time when a first time has elapsed, and at the time when a second time longer than the first time has elapsed, from startup of the engine starter, and estimates the residual capacity from increases over time in the resistance values. The control section (30) starts the engine starter with the lithium ion battery under conditions under which the startup time of the engine starter will be longer when the last startup time of the engine starter is shorter than the second time or when a predetermined time period has elapsed from the last estimation.
Abstract: A vehicle body upper structure includes a dampening material; a pair of first structures that constitute portions on both sides in a width direction of a vehicle body in an upper portion of the vehicle body; and a second structure that extends in the width direction and is joined at opposing ends to the pair of first structures so as to define at least a part of a window opening, to which a windshield is attachable in cooperation with the pair of first structures. The second structure includes a first component and a second component that is joined to the first component in a partially overlapping state therewith, wherein the first component is joined in an overlapping portion to the second component via the damping material at an end of the first component on the first structure side.
Abstract: A vehicle body upper structure includes a pair of first structures that constitute portions on both sides in a width direction of a vehicle body in an upper portion of the vehicle body; and a second structure that extends in the width direction and is joined at opposing ends to the first structures so as to define at least a part of a window opening, to which a windshield is attachable in cooperation with the first structures. The second structure includes a low-rigid portion that is joined to one of the pair of first structures in a first area of the one of the pair of first structures, and a high-rigid portion that is separated in distance in the width direction from the first area and that has higher rigidity than the low-rigid portion. The low-rigid portion being joined to one of the first structures via the damping material.
Abstract: Disclosed is an electronic key system which comprises a vehicle-mounted device and a plurality of electronic keys, and is configured to have: a normal mode in which a given processing is permitted to be executed by the vehicle-mounted device when a given wireless communication processing between the vehicle-mounted device and any one of the plurality of electronic keys is successfully completed; and a deactivated mode in which the given processing is inhibited from being executed by the vehicle-mounted device. The vehicle-mounted device is configured not to execute, in the deactivated mode, the given processing even when receiving an RF signal after transmitting an LF signal, during the given wireless communication processing, and the one electronic key is configured not to transmit, in the deactivated mode, the RF signal even when receiving the LF signal, during the given wireless communication processing.
Abstract: Substances in external EGR gas are smoothly guided to a combustion chamber. An intake passage includes: a main intake passage including intake ports and communicating with a combustion chamber and having a supercharger interposed in the main intake passage; and a bypass passage branching off from the main intake passage upstream of the supercharger, and connected downstream of the supercharger; a flow rage adjustment valve changing a cross-sectional flow area of the bypass passage. The bypass passage is provided above the main intake passage, and includes an upper passage to which an EGR passage is connected.
Abstract: A reinforcing member is provided inside a closed cross section of a front side frame at a position, in a vehicle longitudinal direction, which corresponds to a forming position of a bead. The reinforcing member extends between an outward side wall portion and an inward side wall portion of the front side frame. The reinforcing member is joined to the outward side wall portion and the inward side wall portion of the front side frame. A joint length, in the vehicle longitudinal direction, of the reinforcing member and the inward side wall portion is set to be longer than that of the reinforcing member and the outward side wall portion.
Abstract: An object of the present invention is to simplify portions of an oil supply passage which portions are formed at a cylinder block. An oil supply device according to the present invention includes a cylinder block, an oil pan, an oil pump, and an oil filter. Wall portions of the oil pan are coupled to wall portions of the cylinder block. An oil filter is attached to the oil pan. An upstream oil supply passage through which the oil filtrated by the oil filter flows is formed at the oil pan. A downstream oil supply passage including a main gallery extending in a cylinder column direction is formed at the cylinder block. A first communication passage through which the main gallery and the upstream oil supply passage communicate with each other is formed at the wall portion of the cylinder block and the wall portion of the oil pan.
Abstract: A display device includes a display unit for displaying a moving body speed being a speed of a moving body, a first speed that is arbitrarily settable by a driver, and a second speed that is not arbitrarily settable by the driver. The display unit includes a display having a drawing function, and a frame member disposed to overlap the display. The display includes a display area spanning an inner side and an outer side of the frame member. The display displays the moving body speed and the first speed on the inner side of the frame member, and displays the second speed on the outer side of the frame member.
February 15, 2018
Date of Patent:
September 15, 2020
Mazda Motor Corporation
Yo Kitamura, Seiji Hisada, Hado Morokawa
Abstract: An automatic transmission is provided, which includes a brake including a hub member which is coupled to a transmission case and includes first and second hub members, a drum member coupled to a given rotary member, friction plates, a piston configured to engage the friction plates, and a valve body disposed in a lower part of the transmission case. The first hub member includes a radially outer circumferential part formed with a first spline part spline-engaged with the transmission case, and a cylindrical part provided at a radially inner circumferential side and formed with a second spline part with which the friction plates are spline-engaged. The second hub member is disposed at a side part of the first hub member, is provided by fitting a radially outer circumferential part of the second hub member to the transmission case, and has a feed part for lubrication.