Yamaha Hatsudoki Kabushiki Kaisha

Yuichi Sasaki

Michihisa Nakamura

Takahiko Hasegawa

Midori Nagata

An operation control system for an engine having at least one piston includes an engine control unit which drives a fuel pump for supplying fuel to an injector. The engine control unit is configured to perform a control function to cut the electric power supply to the fuel pump when the piston arrives at a position in the vicinity of compression top dead center in the cylinder of the engine.

Operation control system for an engine and vehicle comprising the same

A fuel injection control system for a motorcycle includes an ECU (Engine Control Unit) which calculates the amount of fuel to be injected by an injector based on data detected by various sensors. The fuel injection control system also includes a generator which supplies electric power to the injector and the ECU, and is driven in accordance with the engine, and a kick pedal for manually starting the engine by manually driving the generator with a user's foot. The ECU is configured to acquire data detected by the sensors at shorter intervals during a predetermined period before starting the engine than after the engine is started.

Fuel injection control system and vehicle comprising the same

A control system for an engine includes a regulator with an output waveform which includes a plurality of waves, each wave having a peak portion, a first portion located on a front side of the peak portion, and a second portion located on the other side of the peak portion, the second portion exhibiting a more rapid change in voltage than the first portion. An ECU is configured to turn on a fuel injector of the engine at a first timing and turn off an ignition plug of the engine at a second timing, the first and second timings corresponding to a shift in waveform output from the peak portion toward the first portion of a first wave and a second wave, respectively. The waveform shift corresponds to a predetermined angular shift in the rotational position of a crankshaft of the motorcycle engine of preferably about 3&#xb0;.

Engine control system and vehicle including the same

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.

Growing community of inventors

Shizuoka, Japan

Yuichi Sasaki