Mazda Motor Corporation

Seisuke Mitsunaga

Hidekazu Shiraishi

Akihito Nagao

Mitsuru Wakabayashi

Naoya Matsuo

Yasunori Sasaki

Chieko Nakagami

Yukifusa Hattori

Ryuichi Yamada

Katsuya Shimizu

Shingo Ono

A sound generation device for a vehicle, the sound generation device being installed in a vehicle which travels using an electric-powered motor as a power source, includes a sound control apparatus which sets a plurality of frequencies corresponding to a motor rotation speed and generates a synthetic sound signal indicating a synthetic sound including sounds at the plurality of frequencies and a speaker which outputs the synthetic sound based on the synthetic sound signal generated by the sound control apparatus, and the sound control apparatus sets an increase amount of an output of a sound in a low frequency band large compared to an increase amount of an output of a sound in a high frequency band in a frequency range of the synthetic sound in accordance with an increase in a motor torque value.

Sound generation device for vehicle

A cowl panel comprises an upper face portion where a windshield is joined, a forward protrusion portion extending downwardly from the upper face portion, protruding forwardly, a rearward protrusion portion extending downwardly from a rear lower end of the forward protrusion portion, protruding rearwardly, and a lower face portion extending forwardly from a lower end of the rearward protrusion portion. A reinforcing member which is positioned on a forward side of the forward protrusion portion and the rearward protrusion portion of the cowl panel and joined to the forward protrusion portion and the lower face portion is provided. The reinforcing member comprises a straight portion which substantially straightly extends downwardly from a joint part where the reinforcing member is joined to the forward protrusion portion, and the straight portion is provided with a fragile part.

Vehicle-body structure of vehicle

A control system in an automobile has a controller to provide an air-to-fuel ratio leaner than an ideally combustible air-to-fuel ratio when a lean control range of engine operating conditions is detected, and a controller to increase an air flow rate so as to enrich a fuel mixture when an engine operating condition is transitional to the lean control range. The control system conducts sequentially the lean control and the enrich control according to transitional patterns to the lean control range.

Engine control system

Growing community of inventors

Aki-gun, Japan

Seisuke Mitsunaga