Mazda Motor Corporation

Gp Daikyo Corporation

Daikyonishikawa Corporation

Takanobu Kamura

Masaru Chikita

Tsuyoshi Sugihara

Takahiro Tochioka

Naoki Yamada

Yoshihiro Takemoto

Mitsuharu Kaneko

Kazuhiro Takemura

Issei Harima

Akinori Utsunomiya

Chie Fukuhara

Yuta Tango

Noboru Kyuto

Hirotaka Mochizuki

Shinichi Kaihara

Fumiya Mouri

Toshiharu Ikeda

Yoshio Fujii

Gunji Yoshii

Kenji Murase

Minoru Sunada

Tsutomu Naganuma

Shoji Nanba

Kouya Nakagawa

Shinya Nakamura

Katsuhisa Imai

A braking control device for a vehicle is provided, which includes an operating amount detecting part configured to detect an operating amount of a brake pedal, a reaction-force giving part configured to generate a reaction force of the brake pedal, a braking-force generating part configured to generate a braking force for wheels according to the brake pedal operating amount, and an electronic control unit (ECU) electrically connected with them. The ECU includes a processor configured to control the giving part and generating part, and set a braking rigidity characteristic based on a braking rigidity that is a ratio of the reaction force to the operating amount, and a vehicle deceleration. The ECU sets a braking rigidity value so that the braking rigidity value increases as the vehicle deceleration becomes larger. The ECU controls the reaction-force giving part based on the braking rigidity value.

Braking control device for vehicle

A braking control device for a vehicle is provided, which includes an operating amount detecting part configured to detect an operating amount of a brake pedal, a reaction-force giving part configured to generate a reaction force of the brake pedal, a braking-force generating part configured to generate a braking force for wheels, and an ECU electrically connected with them and configured to control the reaction-force giving part and the braking-force generating part, and set a braking characteristic in which the reaction force according to a stepping force of the brake pedal and a deceleration of the vehicle have a logarithmic relationship, and when the reaction force is above a given reaction force. The ECU controls the braking-force generating part based on the braking characteristic while making the deceleration for the reaction force higher than the logarithmic relationship.

The present invention is a floor panel structure of a car body that can reduce noise within the automobile cabin. The present invention is a car body floor panel structure wherein the floor of an automobile has a floor panel connected to car body frame members, and also a predetermined mode of vibration is generated to suppress the generation of acoustic emission from the floor panel. The floor panel vibration mode adjusting structure has rectangular rigidity adjusting areas that are formed by causing the floor panel to protrude upward or downward in order to generate 2&#xd7;1 mode or 2&#xd7;2 mode vibration in the floor panel in a frequency band that nearly matches the tire cavity resonance frequency.

Automotive floor panel structure

The resin-made floor panel structure including a trunk floor Fmade of resin integrally forming a spare tire storage space S, and a trunk board Bmade of resin disposed so as to cover the floor panel, fitting parts Sw, Bkfor achieving the closure of the spare tire storage space are integrally formed respectively in the trunk floor and trunk board. Thereby, in using resin materials for a floor panel, transmission of noise in the floor section to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

Resin-made floor panel structure

The present invention is a floor panel structure of a car body where an automobile floor comprises a floor panel that is connected to the frame members of the car body and also has a vibration mode adjusting structure that suppresses the generation of acoustic emission by generating 2&#xd7;1 mode vibration in a predetermined frequency band. The floor panel has a non-rectangular vibration region and the vibration mode adjusting structure of the floor panels the vibration mode adjusting structure of the floor panel comprises a vibration adjusting part that defines the vibration distribution and vibration amplitude of the antinodes of 2&#xd7;1 mode vibration, and the vibration adjusting part is disposed within the a non-rectangular vibration region so as to make the vibration volumes of two antinodes of vibration in 2&#xd7;1 mode nearly the same.

The present invention is a floor panel structure of a car body where an automobile floor includes a floor panel that is connected to the frame members of the car body and also have a vibration mode adjusting structure that suppresses the generation of acoustic emission by generating 2&#xd7;1 mode vibrations in a predetermined frequency band. The floor panel has a non-rectangular vibration region and the vibration mode adjusting structure of the floor panel has a vibration adjusting part that defines the position of node of 2&#xd7;1 mode vibration, and this vibration adjusting part is disposed within the non-rectangular vibration region so as not to touch the frame members and so as to form two regions where the vibration volumes of two antinodes of vibration in 2&#xd7;1 mode are made nearly the same.

A floor panel structure of a vehicle body where a vehicle floor has floor panels with their peripheral edges linked to a plurality of frame members that are disposed in a vehicle body lengthwise direction and a vehicle body crosswise direction and linked to an engine or a suspension is disclosed. The floor panel has a joint where at least part of its peripheral edge is joined to the frame member, a groove formed along the entire length of the joint and a high-rigidity area formed within the low-rigidity area. The low-rigidity area forms a vibration blocking area along the entire length of the joint by using a difference in rigidity from the high-rigidity area.

Floor panel structure of vehicle body

The resin-made floor panel structure including a trunk floor F made of resin, and a trunk board B made of resin disposed so as to cover the trunk floor, a foamed layer having foams exposed at least in part is provided only on the side of the trunk board facing the floor panel. Thereby, in using resin materials for a floor panel, transmission of noise in the floor to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

A floor is partitioned into a plurality of areas S to S by a floor tunnel portion , side frames , side sills , and cross members , and , and the rigidity of the floor panels of the areas S to S is adjusted by rigidity adjustment portions , and . These floor panels are set such that their natural frequency in a 2&times;1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.

Growing community of inventors

Hiroshima, Japan

Takanobu Kamura