Mazda

[Problem] To improve a sense of an increase in acceleration while ensuring controllability of acceleration with respect to an accelerator operation in a vehicle control system that controls a drive source on the basis of target acceleration. [Solution] A vehicle control system 1 includes: a motor 2 that generates a driving force of a vehicle; an accelerator operation amount sensor 16 that detects an accelerator operation amount; a vehicle speed sensor 18 that detects a vehicle speed; and a controller 20 configured to determine target acceleration at least on the basis of the accelerator operation amount and the vehicle speed and to control the motor 2 to generate the driving force that corresponds to the target acceleration. The controller 20 is configured to determine target jerk on the basis of the target acceleration or actual acceleration of the vehicle at a time point, at which the accelerator operation amount becomes constant, and/or the current vehicle speed, and determine the target acceleration to achieve the target jerk when the accelerator operation amount is constant during acceleration of the vehicle.

To provide a rear structure of a vehicle body capable of suppressing torsional deformation that is associated with input of an upward load from a rear damper during travel, a rear structure of a vehicle body (1) includes a front brace (17) which is provided to have a lower end portion joined to an end portion of a rear cross member (16) in a vehicle width direction and extend upward along an inner surface of a wheelhouse inner (10), and at least an upper end portion of which is joined to the wheelhouse inner (10). In the rear structure of the vehicle body (1), the front brace (17) constitutes a load transmission path (L3) through which an upward load input to an attachment portion (P1) of a rear suspension is transmitted to a rear cross member (16).

[Problem] To provide a lower vehicle-body structure that allows a load applied to a vehicle body from the front side to be transmitted to a side sill. [Means for Solution] A lower vehicle-body structure includes a pair of side sills, a reinforcement disposed in a side sill of the pair of side sills, and extending in a front-rear direction, and a bracket configured to connect the side sill to the reinforcement. The side sill includes a side sill inner portion, and a side sill outer portion fixed to a vehicle-width-direction outer side of the side sill inner portion, and forming a closed cross-section in cooperation with the side sill inner portion. The bracket includes an upper wall extending in a vehicle width direction, and fixed to a lower surface of the reinforcement, an inner wall extending downward from an inner end of the upper wall in the vehicle width direction, and fixed to the side sill inner portion, and an outer wall extending downward from an outer end of the upper wall in the vehicle width direction, and fixed to the side sill inner portion and the side sill outer portion.

[Problem] To provide a lower vehicle-body structure that allows a load applied to a side sill from a vehicle-width-direction outer side to be efficiently transmitted to a cross member. [Means for Solution] A lower vehicle-body structure includes a pair of side sills, at least one cross member that couples the pair of side sills together, and a reinforcement extending in a front-rear direction in each of the pair of side sills. The reinforcement includes a first part disposed at a position that overlaps with at least one cross member when a vehicle is viewed in a side view, and a second part disposed at a position that does not overlap with at least one cross member when the vehicle is viewed in a side view. A rigidity of the second part against a load from a vehicle-width-direction outer side is lower than a rigidity of the first part against a load from the vehicle-width-direction outer side.

[Problem] The purpose of the present invention is to provide a vehicle lower portion structure capable of improving the strength of a vehicle equipped with a battery to withstand collision loads during both a side collision and a front collision of the vehicle.[Means for Solution] A vehicle lower portion structure includes: a toeboard 18 that is disposed forward of a frontmost cross member 4A and is curved upward; a reinforcement member 20 for reinforcing the toeboard 18; and a battery 5 disposed under a plurality of cross members 4A to 4D. A rear end portion 20c of the reinforcement member 20 is affixed to the frontmost cross member 4A. The frontmost cross member 4A is affixed with a bolt 14 to an intermediate frame 13 extending in the vehicle front-rear direction of the battery 5.

[Problem] To enhance energy absorption in a side collision. [Means for Solution] A lower vehicle-body structure for a vehicle includes: a floor panel 4; side sills 10 coupled to both end portions of the floor panel 4 in a vehicle width direction, and extending in a vehicle body front-rear direction; reinforcements 15 disposed in the side sills 10, and extending in the vehicle body front-rear direction; and cross members 30 disposed on an upper surface of the floor panel 4, and extending in a vehicle width direction. Each cross member 30 is disposed at a position that overlaps with the reinforcement 15 as viewed in a side view of the vehicle, and an upper surface of a vehicle-width-direction outer end portion of the cross member 30 is formed to be inclined upward as the upper surface of the vehicle-width-direction outer end portion of the cross member 30 extends from a vehicle-width-direction inner side toward a vehicle-width-direction outer side.

[Problem] To provide a lower vehicle-body structure for a vehicle, the lower vehicle-body structure being capable of transmitting, to a side sill, a load input from the front side of a vehicle body in a SORB test or the like.[Means for Solution] A lower vehicle-body structure for a vehicle 1 includes: a floor panel 4; side sills 6 extending in a vehicle body front-rear direction at both ends of the floor panel 4 in a vehicle-body width direction; hinge pillars 7 connected to the side sills 6 and extending in an up-down direction at front ends of the side sills 6; and reinforcements 65 extending in the vehicle body front-rear direction in the side sills 6, and fastened to the hinge pillars 7 via fastening members 66.

[Problem] To increase the amount of energy absorption of a side sill reinforcement against side collision energy. [Means for Solution] A lower vehicle-body structure 1 of a vehicle 100 includes a floor panel 2, side sills 3, and reinforcements 30 disposed in the side sills 3, and extending in the front-rear direction. The reinforcement 30 includes an upper wall 31, a lower wall 32, an outer wall 33, and an inner wall 34. The reinforcement 30 further includes one or a plurality of vertical walls 35 extending in the front-rear direction between the outer wall 33 and the inner wall 34, and connecting the upper wall 31 and the lower wall 32 together, and an inner space S of the reinforcement 30 is partitioned in the vehicle width direction by the vertical walls 35 in such a way as to divided into a plurality of closed cross-section portions S1 to S3. At least one of the upper wall 31 or the lower wall 32 has a groove 36 in at least one of positions at which the vertical walls 35 are connected, the groove 36 extending in the front-rear direction over the entire length of the reinforcement 30.

An EGR system for a rotary engine 2 includes: side housings 232, 233, 242 each having a side exhaust port 43; rotor housings 231, 241 each having a peripheral exhaust port 44 opened at timing later than the side exhaust port; a side exhaust passage 18 connected to the side exhaust port; a peripheral exhaust passage 19 connected to a peripheral exhaust port; an EGR passage 6 recirculating some of exhaust gas as EGR gas to an intake passage 11, the exhaust gas being discharged from the peripheral exhaust port; an EGR cooler 68 located in the middle of the EGR passage and cooling the EGR gas. The EGR passage has an in-housing EGR passage 61 formed inside the side housing, and the in-housing EGR passage is in contact with a cooling water passage 7 having the side housing.

A stator coil is configured with a plurality of segment coils. A plurality of joining portions which are formed by electrically joining end portions of the plurality of segment coils include a plurality of first joining portions included in a first layer L1 and a plurality of second joining portions included in a plurality of second layers L2. A first end portion as the end portion of the segment coil to serve as an end portion of the stator coil is included in the first layer L1. The conductive member extends in a radial direction and is electrically joined to the first end portion. When seen from an outer side in the radial direction, a joining portion of the first end portion and the conductive member is positioned, in a circumferential direction, between the second joining portions included in the second layer L2, which is positioned on the outer side in the radial direction relative to the first layer L1, among the plurality of second joining portions.