Mazda Motor Corporation

Fumitaka Andou

Norio Asano

Masaya Hiramatsu

Hiroaki Takeshita

Kiyoshi Sakamoto

Kazuhiro Okuyama

Shohei Yoshida

Koji Takahashi

Ippei Kuroda

Toshihide Koyama

Kazufumi Adachi

Toshio Hayashi

Shun Teshigahara

Hiroshi Tanaka

Kazuki Yamauchi

Atsushi Okamitsu

Tsukasa Harada

Masashi Oda

Makoto Nishino

Masahito Watanabe

A double-wishbone type of suspension device for a vehicle comprises a forked-shaped upper arm, a forked-shaped lower arm, and a connecting rod which connects a front-side arm portion of the upper arm and a rear-side arm portion of the lower arm, wherein the connecting rod comprises an upper rod which is rotatably connected to the upper arm, a lower rod which is rotatably connected to said lower arm, and a resilient bush which connects the upper rod and the lower rod in an expandable manner in an axial direction.

Suspension device for vehicle

A suspension device for a vehicle of the present invention comprises a knuckle supporting a wheel, an upper arm vertically rotatably connected to a vehicle body and pivotally supporting an upper portion of the knuckle, a lower arm provided below the upper arm and vertically rotatably connected to the vehicle body, and a coupling rod coupling the upper arm and the lower arm, wherein the coupling rod is configured to slant in a vehicle longitudinal direction and be rotatably connected to the upper arm and the lower arm, respectively.

In a double-wishbone type front suspension structure, upper and lower arms are pivotally supported at a vehicle-body side via front-and-rear pivotal portions, axial lines of resilient bushes of the front and rear pivotal portions of the arms extend in a longitudinal direction, a knuckle-side pivotal portion of the upper arm is positioned in back of a knuckle-side pivotal portion of the lower arm, and a lower end portion of a damper unit provided between a vehicle body and the lower arm is connected to the lower arm such that the damper unit is positioned perpendicularly to the axial lines of the lower arm in a side view and an upper end portion is pivotally supported at the vehicle body via a rotational axis extending in the longitudinal direction.

Front suspension structure of automotive vehicle

In a rear suspension device of an automotive vehicle, a shock absorber is provided perpendicularly to a H-shaped lower arm in a side view, respective axis of resilient bushes of pivotal portions which pivotally support upper and lower arms at a vehicle-body side are configured to be parallel to a standard line which extends in a vehicle longitudinal direction in a plan view, and an imaginary axial line which interconnects respective centers of front and rear connection portions, via which the lower arm is connected to a wheel side, is configured to extend obliquely forward and inward relatively to the vehicle longitudinal direction.

Rear suspension structure of automotive vehicle

A vehicle-body front structure includes a tower portion comprising a pole portion which extends substantially vertically and a tower top portion which is positioned at an upper portion of the pole portion and projects from the pole portion longitudinally along a front side frame, constituting attachment portions of an upper arm of a front-wheel suspension. A stabilizer-support pedestal for supporting a stabilizer is provided to be connected to the pole portion and the tower top portion. Thus, the pole portion of the sub frame can be properly reinforced by using the stabilizer-support pedestal, so that the rigidity of the upper portion of the pole portion can be properly increased.

Vehicle-body front structure

A pair of right-and-left extension members which deform and absorb an impact at a vehicle frontal collision, in cooperation with a pair of front side frames, are provided. The extension members are configured to be joined to respective middle portions, in a height direction, of a pair of tower portions of a sub frame at their rear end portions, to project forward, bending outward at a level below the front side frames, and to be comprised of a pair of members having a closed cross section, respectively. The rear end portions of the extension members joined to the tower portions are positioned so that a center line of a longitudinal direction of each of the extension members at the rear end portion is located at an inward position relative to a center line of a standing-vertical direction of each of the tower portions.

Suspension arms comprise five arms of a trailing arm, a leading arm, an upper arm, a lower arm, and a control arm. A lower-arm connection portion of a knuckle to the lower arm is positioned in front of a trailing-arm connection portion of the knuckle to the trailing arm as well as a wheel axis. Accordingly, the anti-swing rigidity of a wheel can be increased sufficiently.

Suspension device of vehicle

A rear sub frame comprising a pair of side members, a front cross member, and a rear cross member. The front cross member is configured in substantially a V shape in a front view such that the front cross member slants continuously from both end portions thereof toward a central portion, in a vehicle width direction, thereof which is located below a rear differential, and that a center position, in the vehicle width direction, of a bottom portion of the front cross member which corresponds to an apex portion of the V shape is offset from a center of a vehicle body in the vehicle width direction toward a specified side which matches an offset-arrangement side of a ring gear arranged in the rear differential.

Rear sub frame of automotive vehicle

Front side framesof a vehicle are each vertically connected through a corresponding one of joint membersto a cross memberconfigured to support a suspension arm below the front side frame. The joint membersare each coupled to a back end of a corresponding one of extension frames. This allows the front side framesand the cross memberto share the load experienced by the extension framesin a frontal collision of the vehicle.

Structure of front portion of vehicle body

A sub frame attached to a vehicle-body rear portion from below comprises a pair of right-and-left side members and a front cross member which interconnects substantially respective central portions, in a vehicle longitudinal direction, of the side members. As attachment portions for attaching lower links, there are provided a central attachment portion which is provided at an interconnection portion between the side member and the front cross member, a front attachment portion which is provided at the side member at a position located in front of the interconnection portion, and a rear attachment portion which is provided at the side member at a position located in back of the interconnection portion. Thereby, a sub frame structure of an automotive can be superior in the light weight, ensuring the support rigidity of the suspension links.

Sub frame structure of automotive vehicle

A powertrain system for a motor vehicle comprises a power unit (), a differential module () and a propeller shaft () provided to extend in a frontward-rearward direction of a vehicle body to transmit drive power of the power unit () to the differential module (). The propeller shaft () is divided into a front shaft segment () a rear shaft segment () through the intermediary of a third universal joint (), and adapted to be contracted in such a manner that the front shaft segment () is fitted into an end of the rear shaft segment () over a contractable range D1, together with a part of the third universal joint (). The differential module () has a module body (), and a rear support section () which supports the module body () to allow a front portion of the module body () to be swingably moved downwardly.

Powertrain system for motor vehicle and motor vehicle lower structure having the same

In an air pressure information display system of a vehicle tire, a vehicle () has air pressure sensors (-) for detecting the air pressure of a vehicle tire (-), and transmitting air pressure information indicating the detected air pressure via a wireless communication, and an informing unit () installed in a gas station or the like has a display module () for displaying the received air pressure information.

Air pressure information display system of vehicle tire

In a multi-link rear suspension (A) in which a wheel support () is connected to a vehicle body through five links () and vehicle body side ends of the links are provided with rubber bushes (), respectively, the lower end of a damping device () formed by coaxially arranging a coil spring () and a damper () is pivoted to a portion of the wheel support () located toward the inside of the vehicle body so that the vertical reaction force of the damping device () produces a moment Mn toward negative camber on a rear wheel (). The moment Mn is set to be always larger than a moment Mp toward positive camber produced by a side force on the outside rear wheel () during vehicle cornering until limit maneuvering conditions of the outside rear wheel due to the side force are reached. The damping device () is disposed with respect to a suppositive king pin axle K so that the vertical reaction force thereof produces a moment toward toe-in on the rear wheel (). In this manner, the multi-link suspension provides a sharp driving feeling applicable even for a sports car while maintaining a good ride through the involvement of the rubber bushes ().

Automotive rear suspension system

An air pressure information display device of a vehicle tire has a normal air pressure storage module () for storing a normal air pressure of a tire corresponding to a tire temperature, an excessive/deficient amount detection module () for detecting the excessive/deficient amount from the normal air pressure on the basis of the stored normal air pressure, and air pressure information detected by an air pressure information detection module (), and a display control module () for controlling a display () to display the detected excessive/deficient amount. Hence, since the user is informed of the excessive/deficient amount from the normal air pressure, he or she can appropriately determine an air pressure state of a tire even when he or she does not recognize the normal air pressure.

Air pressure information display device of vehicle tire

An air pressure warning device of a vehicle tire has an excessive/deficient amount calculation module ( ) for calculating an excessive/deficient amount on the basis of the difference between a normal air pressure stored in a normal air pressure storage module ( ) and a detected tire air pressure, an informing control module ( ) for controlling an informing module ( ) to inform an excessive/deficient state of the tire air pressure determined based on the calculated excessive/deficient amount, and a normal air pressure correction module for increasing the readout normal air pressure by a predetermined value when an expressway traveling detection module ( ) detects that the vehicle is on an expressway.

Growing community of inventors

Hatsukaichi, Japan

Fumitaka Andou