Yamaha Hatsudoki Kabushiki Kaisha

Takahiko Hasegawa

Michihisa Nakamura

Yuichi Sasaki

Midori Nagata

Masashi Kataoka

An engine control apparatus that effectively suppresses a rise in rotation number of an engine in a jump of a vehicle. An engine control apparatus includes an acceleration detecting device for detecting an acceleration component of gravity acceleration in a perpendicular direction of the vehicle body based on a signal inputted from an acceleration sensor, and a control circuit for judging whether the vehicle has jumped or not based on the acceleration component to be detected. The control circuit suppresses a rise in rotation number of the engine when the vehicle is judged to have jumped.

Engine control apparatus and straddle-type vehicle

A straddle-type vehicle that omits a main switch without requiring a special operation to start the engine when battery power is supplied to engine-related electrical components. An electrical circuit has a pickup sensor that detects that the engine is in a start preparation state. An ECU connects an ignition coil, injector and fuel pump with the battery when the start preparation state is detected.

Straddle-type vehicle

A motorcycle has an engine and other components that are controlled based upon output from an acceleration sensor. The motorcycle also has an alarm system that uses the same acceleration sensor to detect vibrations indicative of a potential theft of the vehicle. Various routines of controlling a fuel pump and operation of the engine are disclosed based upon the sensed operating characteristics of the motorcycle.

Acceleration sensor and engine control for motorcycle

A vehicle includes a tip over detection device that uses a vertically oriented sensor to improve the accuracy of detecting when the vehicle has tipped over. An ECU communicates with the accelerometer and controls engine operation. The ECU stops the engine, preferably gradually, when the vehicle has tipped over. The sensor can also detect lean in additional directions that are orthogonal to the vertical direction.

Growing community of inventors

Shizuoka, Japan

Takahiko Hasegawa