Mazda Motor Corporation

Taiki Kado

Atsushi Yamasaki

Shigeyuki Uehara

Makoto Yamada

Kiminori Higo

Tooru Uematsu

Jun Haruki

Keita Ejiri

A vehicle gear-shifting control apparatus is equipped with an engine, a motor, an automatic transmission, a friction brake system, and a controller which executes a regeneration control of imparting a regenerative braking torque to rear wheels by causing the motor to perform a regeneration operation and a gear-shifting control of changing a shift stage of the automatic transmission by outputting a gear-shifting signal in accordance with the rotation speed of an input shaft. The controller starts the gear-shifting control, triggered by the rotation speed decreasing to a predetermined downshift point during a downshift of the shift stage, and during deceleration of the vehicle when a coefficient of friction of a road surface is lower than a predetermined threshold in the regeneration control, the controller sets the downshift point lower than when the coefficient of friction is equal to or higher than the threshold.

Vehicle gear-shifting control apparatus

A switching circuit includes: an input/output terminal section including four SW terminals; lines connecting between these terminals; switches disposed in paths of the respective lines; and diodes disposed in the paths of the respective lines. The switches are single-pole switches. The diodes are connected to normally closed terminals of the switches, respectively.

Switching circuit, failure detection method therefor, and control apparatus

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Hiroshima, Japan

Taiki Kado