Abstract: An engine includes an output shaft, a cylinder head, a cylinder block, and a plurality of head bolts. The cylinder block includes three or more cylinder parts, a plurality of connecting portions, a plurality of output shaft supporting parts, and a plurality of head bolt holes. A side wall face of at least one cylinder part includes a first rib. The first rib diagonally extends from the connecting portion toward a head bolt hole base.
Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed is constant, to set the countertorque such that, as the average torque output by an engine becomes larger, the absolute value of the countertorque becomes smaller.
Abstract: An exhaust system member is provided on a vehicle-width-direction outer side relative to a vehicle body structure on the side of a floor, while avoiding widening of the vehicle and preserving small overlap collision resistance. Embodiments include an engine disposed forward of a partition wall defining a front edge of a vehicle cabin, an exhaust apparatus, a side sill extending along the vehicle front-rear direction on the side of a floor forming a floor surface of the vehicle cabin, and a hinge pillar extending vertically from the side sill. A frame member extends toward the vehicle front side from the hinge pillar and has a front end, on the rear side of a vehicle wheel, overlapping with a vehicle-width-direction length area of the wheel. The exhaust system member is in an area on the vehicle-width-direction outer side of the frame member and on the front side of the hinge pillar.
Abstract: A side vehicle body structure ensures rigidity and shock absorption performance of the body, avoids widening of the body, and smooths the flow of exhaust gas. Embodiments include an engine, an exhaust apparatus, and a rear pillar extending upward from a rear-side portion of a side sill extending in the vehicle front-rear direction. The exhaust apparatus is disposed along the vehicle front-rear direction on the vehicle-width-direction outer side relative to the side sill. An exhaust system member is located at a going-around portion, with respect to the rear pillar, from the front side to the rear side and from the outer side to the inner side in the vehicle width direction. The rear pillar has a cross section orthogonal to the vehicle up-down direction having a shape in which a portion between front and rear ends is located on the vehicle-width-direction outer side relative to these front and rear ends.
Abstract: A vehicle body side structure is provided where an exhaust apparatus is located on the vehicle-width-direction outer side relative to a side sill without widening the vehicle. Embodiments include an internal combustion engine equipped on the front side of a partition wall defining a front edge of a vehicle cabin space, an exhaust apparatus through which exhaust gas exhausted from the internal combustion engine passes, and a side sill extending along the vehicle front-rear direction on the side of a floor forming a floor surface of the vehicle cabin space. The side sill has a recess having a cross section recessed toward the vehicle-width-direction inner side from the vehicle-width-direction outer side in a cross-sectional view orthogonal to the vehicle front-rear direction and extending in the vehicle front-rear direction, and an exhaust system member provided in the exhaust apparatus is disposed at the recess.
Abstract: A driver condition estimating device includes circuitry configured to measure movement of the head of a driver output from a driver camera that photographs the driver and detect a sign of abnormality of the driver from the movement of the head. The circuitry determines existence of the sign of abnormality of the driver by calculating a periodic feature amount from time series data showing movement of the head of the driver, calculating coherence between the movement of the head of the driver and lateral acceleration acting on the head of the driver, calculating time series variation patterns from the obtained periodic feature amount and the obtained coherence, and comparing the obtained time series variation patterns with a predetermined threshold.
November 25, 2020
September 9, 2021
Mazda Motor Corporation
Makoto YOSHIDA, Taro IWAMOTO, Ken IKUHISA, Yohei IWASHITA
Abstract: An exhaust system member is provided on a vehicle-width-direction outer side relative to a vehicle body structure such as a side sill, while avoiding widening of the vehicle, enhancing shock absorption performance during a collision, and maintaining rigidity of the vehicle body. Embodiments include an engine disposed forward of a vehicle cabin, an engine exhaust system, and a hinge pillar extending vertically. The exhaust system includes a first exhaust system member beside the hinge pillar in the vehicle front-rear direction from the vehicle-width-direction outer side of the hinge pillar and extending forward of the hinge pillar, a second exhaust system member rearward of the hinge pillar, and a connection part connecting these exhaust system members. The connection part has a smaller length in the vehicle width direction than at least one of the first and second exhaust system members, and overlaps with the hinge pillar in the vehicle front-rear direction.
Abstract: An engine room structure for a vehicle uses dividing portions of plural wall members forming a cover member, and can thereby easily form a through portion through which plural routing members are caused to pass by notch-shaped portions without forming a substantial through hole. An engine room structure for a vehicle, which includes a cover member covering an upper portion of an engine and in which a through portion is formed in the cover member, and plural routing members pass through the through portion. The cover member is divided into at least a first member and a second member, continuous notch-shaped portions are formed along a partial dividing line between the first member and the second member in either one of those, and the through portion for the plural routing members is formed with the notch-shaped portions of the one member and an end portion of the other member.
Abstract: A resonance tube of a horn according to one aspect of the present invention includes a first resonance tube and a second resonance tube branching from the first resonance tube at a branching portion. The first resonance tube is a resonance tube that resonates with a first sound contained in a chord generated by a diaphragm. The first resonance tube includes: an input opening surface to which the chord is input; and a first opening surface from which the first sound is output. The second resonance tube is a resonance tube that resonates with a second sound contained in the chord. The second resonance tube includes a second opening surface from which the second sound is output. The second opening surface is displaced from the first opening surface in a normal direction K1.
Abstract: When an engine rotation speed is lower than a reference rotation speed, first failure determination in which failure of a flow rate control valve is determined based on a pressure change of cooling water detected by a pressure sensor is executed, when a valve closing instruction to switch the flow rate control valve from an opened state to a closed state is output from a valve control device; and when an engine rotation speed is equal to or higher than the reference rotation speed, second failure determination in which failure of the flow rate control valve is determined based on a pressure change of cooling water detected by a pressure sensor is executed, when a valve opening instruction to switch the flow rate control valve from a closed state to an opened state is output from the valve control device.
Abstract: A method of determining an abnormality of a differential pressure sensor which is configured to detect a pressure differential between an upstream side and a downstream side of an EGR valve provided to an EGR passage of an engine, is provided. The method includes the steps of controlling an opening of the EGR valve based on an output value of the differential pressure sensor, determining the abnormality of the differential pressure sensor based on the output value of the differential pressure sensor, controlling at least a throttle valve of the engine toward a closed side so that the pressure differential is maintained at a given pressure or higher when determining, and prohibiting the execution of the abnormality determination when an engine speed is a given engine speed or higher, and permitting the execution of the abnormality determination when the engine speed is less than the given engine speed.
Abstract: Provided is an ignition control section and an injection control section. When partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes an injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Ignition timing of the preceding ignition is set to be more advanced when an in-cylinder temperature specified by an in-cylinder temperature specification section is high than when the in-cylinder temperature is low.
Abstract: A power control device for a power supply mounted on a vehicle is provided, which includes a generator mounted on the vehicle and configured to regenerate power from kinetic energy of the vehicle, a high-voltage battery configured to accumulate the power regenerated by the generator, a low-voltage battery of which a nominal voltage is lower than the high-voltage battery, a voltage converter configured to lower an output voltage from the high-voltage battery and charge the low-voltage battery at the lower voltage, and a controller configured to control the voltage converter. The controller operates the voltage converter to start the charging of the low-voltage battery after the vehicle is powered ON and before an engine mounted on the vehicle is started.
Abstract: A compression ignition engine with a supercharger is provided, which includes one or more valves configured to switch a state between a first state where intake air is boosted by the supercharger and a second state where it is not boosted, a fluid temperature adjuster configured to adjust a temperature of engine coolant to be supplied to a radiator from an engine body, and a controller. When the engine operates in a high-load range, the controller controls the combustion mode to be in a compression ignition combustion mode, and causes the valve(s) to be in the first state, and in a low-load range, the controller causes the valve(s) to be in the second state. In the high-load range, the controller outputs a control signal to the fluid temperature adjuster so that a target temperature of the engine coolant is lowered than that in the low-load range.
Abstract: A vehicular passenger restraint device including a seatbelt capable of restraining a passenger seated in a rear seat 10 includes a belt guide 50 disposed on the outer side, in the vehicle width direction, of an upper portion of a seat back 12, and the belt guide 50 is configured such that an inner longitudinal surface portion 52 is tiltable toward the inner side in the vehicle width direction by a load applied from the seatbelt at the time of collision. A lock release switch 14 for the seat back 12 is disposed on the inner side in the vehicle width direction relative to the belt guide 50. A regulation member 55 regulating the inner longitudinal surface portion 52 between the belt guide 50 and the lock release switch 14, not to be incline toward the inner side in the vehicle width direction by a predetermined angle or more.
Abstract: A front body structure of the vehicle includes a pair of left and right apron reinforcements, a pair of left and right front side frames, a pair of left and right suspension housings, and a sub-frame. The front body structure of the vehicle further includes a shroud upper that joins the front ends of the apron reinforcements, a pair of left and right shroud members that join the shroud upper and the front ends of the front side frames, and a pair of left and right front joint members that join the front ends of the front side frames and the sub-frame, in which the shroud members are joined to the upper surfaces and the side surfaces of the front side frames.
Abstract: An engine EGR system is provided. An EGR passage includes an EGR cooler, an EGR internal passage passing through a cylinder head on an upstream side of the EGR cooler, and a relay passage extending outside the cylinder head and connecting the EGR internal passage to the EGR cooler. The EGR cooler formed in a columnar shape is arranged above an intake manifold so as to locate a gas inflow port on a first end surface side and a gas outflow port on a second end surface side, and the relay passage communicates with the EGR internal passage on an external side of the engine compared to a head EGR gas exit. The EGR cooler inclines downward from the gas outflow port toward the gas inflow port, and the relay passage is connected to the gas inflow port while being bent downward toward the upstream side.
February 17, 2021
Date of Patent:
September 7, 2021
Mazda Motor Corporation
Shinji Fujihira, Hiroshi Kinoshita, Takashi Kariya, Takayuki Tominaga, Ken Yoshida
Abstract: In the vehicle control system, a controller may perform first regenerative control that causes a motor generator to perform regeneration so as to apply a braking force to a vehicle when the accelerator is off and, when the accelerator is off and a steering is turned, perform second regenerative control that causes the motor generator to perform regeneration so as to apply a braking force to the vehicle in order to control the vehicle attitude by generating a deceleration that corresponds to a steering angle in the vehicle in addition to the first regenerative control.
Abstract: To reduce the man-hours of software development when vehicle types are deployed, an in-vehicle equipment control device has a control unit that outputs, to actuators, control signals based on the outputs from sensor devices. The control unit includes a middleware layer and a device driver layer as software components. The middleware layer includes a routing module that selects whether the communication data output from the sensor devices is output as is or the communication data is subjected to predetermined processing and then output according to the type of the communication data, and a treatment module that performs the predetermined processing on the communication data. The routing module has a function of outputting the communication data to the device driver.
Abstract: The present disclosure relates to reducing software development man-hours when vehicle models are developed. In an in-vehicle equipment controller, a control section has, as a software configuration: an application layer in which an application for in-vehicle equipment is implemented; a device driver; and a middleware layer in which a communication path is generated between the application and the device driver. The middleware layer includes a physical quantity conversion module that converts physical quantity data according to a specified conversion rule, the physical quantity data being included in data transferred through the communication path.