Nippondenso Co., Ltd.

Hitoshi Tanaka

Takahiro Goshima

Yoshiyuki Hattori

Ken Nomura

Kozi Takagi

Takashi Ozawa

An anti-skid braking control system for use on a motor vehicle having first and second wheels includes first and second wheel cylinders for braking the first and second wheels, respectively, with a braking medium pressure transmitted from a master cylinder, first and second solenoid-operated valves disposed in pipes interconnecting the master cylinder and the first and second wheel cylinders, respectively, for selectively providing communication between the master cylinder and the first and second wheel cylinders through the pipes, and first and second pumps connected to the pipes, respectively, for delivering a braking medium from portions of the pipes downstream of the valves to portions of the pipes upstream of the valves. The first and second pumps comprise a common housing, a common plunger slidably disposed in the common housing and reciprocally movable therein, and first and second pressure varying chambers defined by the plunger independently of each other and having respective volumes variable in response to reciprocating movement of the common plunger, the first and second pressure varying chambers having inlet ports, respectively, connected directly to the downstream portions of the pipes. When the anti-skid braking control system operates in an anti-skid braking control mode, the common plunger is reciprocally moved to enable the first and the second pumps to reduce the braking medium pressures in the first and second wheel cylinders independently of each other.

Anti-skid braking control system for use on motor vehicle

In an automotive infinite transmission, a rotation of an input pulley is transmitted to an output pulley through a belt in such a manner that a transmission ratio is continuously variable. Each of the input and output pulleys has a fixed pulley member fixedly mounted on a rotary shaft and a movable pulley member mounted on the rotary shaft for axial movement toward and away from the fixed pulley member. A tapered pulley surface of the fixed pulley member cooperates with a tapered pulley surface of the movable pulley member to define therebetween an annular groove having a generally V-shaped cross-section. A plurality of drive blocks are arranged between the pulley surfaces of the respective fixed and movable pulley members and circumferentially along the annular groove with the drive blocks being in sliding contact with the pulley surfaces. Provision is made between the drive blocks and the pulley surfaces in sliding contact therewith for reducing frictional forces. When the movable pulley member is moved axially relative to the fixed pulley member, the drive blocks are moved along generally radially extending slits formed in the tapered pulley surfaces of the respective movable and fixed pulley members. The drive blocks are biased radially inwardly against a centrifugal force due to the rotation of the movable and fixed pulley members.

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Obu, Japan

Hitoshi Tanaka