Honda Motor Co., Ltd.

Masato Morita

Yotaro Mori

Hideki Uematsu

Hikaru Tsukamoto

A fuel injection control system includes an engine speed detector, a throttle opening degree detector, a fuel injection device, a fuel injection controller, a fuel injection number determining device, and a fuel injection mode setting device. The engine speed detector is configured to detect an engine speed (NE). The throttle opening degree detector is configured to detect a throttle opening degree (TH). The fuel injection device is configured to inject fuel. The fuel injection controller is configured to calculate, based on an injection amount map, a fuel injection amount of the fuel to be injected from the fuel injection device and is configured to control the fuel injection device to inject the fuel according to the calculated fuel injection amount.

Fuel injection control system

A branch joint is provided at the rear portion of an exhaust pipe. Second exhaust pipes with a small diameter arranged one above the other are branched at a position forward of an intersecting position P with a pivot plate. The second exhaust pipes are made to intersect the inside of the pivot plate. The gap between the pivot plate and the engine can be narrowed while ensuring a smooth exhaust. The exhaust path lengths of the second exhaust pipes are made to be offset from each other so as not to be the integral multiple of the wavelength of the exhaust sound in the operating area. This allows exhaust gases to interfere with each other in the muffler. Thus, the exhaust sound can be reduced and the muffler can be downsized. This allows for the slimming of the vehicle body without lowering the output of the engine.

Growing community of inventors

Wako, Japan

Masato Morita