Mazda Motor Corporation

Toshiyuki Matsuzaki

Yoshikazu Nobutoki

Koji Terayama

Hideki Nakazono

Toshiyuki Yamaguchi

Jun Katayose

Kouji Nagaoka

A PCM () that is an engine control device functions to acquire a master vac negative pressure which is the negative pressure of a stabilized chamber of a master vac () which amplifies a brake pedal depressing force applied to a brake pedal (), and also acquire a brake working fluid pressure that is a braking hydraulic pressure produced by a master cylinder () in accordance with the brake pedal depressing force amplified by the master vac (), and in a case where both accelerator pedal () and a brake pedal () are depressed or actuated simultaneously, determine whether or not it is necessary to decrease engine output based on such master vac negative pressure and brake working fluid pressure to execute the output decreasing control for decreasing the engine output.

Engine control device and method for estimating brake pedal depressing force

Communication nodes which respectively transmit periodic information and non-periodic information in multiplex fashion are provided separately. These communication nodes selectively transmit periodic information to a multiplex transmission line which is originally for transmitting the non-periodic information or non-periodic information to a multiplex transmission line which is originally for transmitting the periodic information in accordance with the state of transmission/reception of the periodic information and non-periodic information.

Multiplex transmission apparatus

Growing community of inventors

Hiroshima, Japan

Toshiyuki Matsuzaki