Mazda Motor Corporation

Nobuo Doi

Haruo Okimoto

Kazuhiko Ueda

Sadashichi Yoshioka

Masahiko Matsuura

Hiroaki Deguchi

Kiyonori Nagato

Yoshitsugu Hanada

Koji Horikawa

Takeshi Ota

Hitoshi Hongo

A power plant is mounted on both sides in a transverse direction by mounts. Each of the mounts is placed within a triangle defined by a point on a primary inertial axis of the power plant on the transverse side of the power plant, a point at a node of power plant bending vibrations in a twisting mode or in a fluctuation mode, and a point defined by the intersection of a perpendicular line passing through the primary inertial axis and a horizontal line passing through the node of vibrations.

Automobile power plant mounting structure

A transmission structure for an automotive vehicle having a power unit includes an engine and a transmission device, including a power transmitting device connected to an output shaft of the engine, for transfer from an output of the engine to the transmission device. A first housing for the power transmitting device, a second housing for the transmission device, connected to the first housing, a differential device, housed in the first housing and positioned so as to be offset from an output shaft of the engine, and a reinforcement element, having one end portion connected to an upper surface of the first housing and another end portion connected to both side surfaces of the second housing, are provided.

Transmission structure for an automotive vehicle

An engine control system having an engine vibration sensor which detects engine vibrations. A control circuit is provided for discriminating engine roughness wherein the engine vibration level is above a predetermined level and for decreasing the fuel supply continuously when engine roughness is not detected, in order to make the mixture leaner, but increasing the fuel supply when engine roughness is detected to make the mixture richer. A detector is provided for detecting a specific engine condition wherein the mixture is enriched for specific purposes. The control circuit is responsive to the output of the engine condition detector and discontinues the roughness control when the specific engine condition is detected.

Engine roughness control

A control system for a vehicle engine in which fuel supply quantity is controlled in accordance with the engine roughness level. An engine roughness sensor is provided for detecting engine vibrations and producing a roughness signal which is compared with a reference signal. When the roughness signal is greater than the reference signal, the fuel supply is increased to enrich the air-fuel mixture but, when the roughness signal is smaller than the reference signal, the fuel supply is decreased to make the mixture leaner. The reference signal is smallest in idling operation and stepwisely increased depending on an increase in the load on the engine.

Engine roughness control means

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Hiroshima, Japan

Nobuo Doi