Technical Paper
Superiority of Newly Developed Direct-Injection Engine over Conventional Engine for Personal Watercraft
2001-12-01
2001-01-1787
A new engine of which the fuel is injected directly into the has been developed cylinder as an environmental-friendly engine for personal watercraft(PWC). This new engine surpasses the conventional carbureted engine in performance, yet achieves 75% reduction of THC+NOx emission and 30% improvement of fuel consumption in the ICOMIA mode. This paper describes the system characteristics of this newly developed DI engine, with reference to its combustion and exhaust gas emission properties. This newly developed engine employs a fuel injection system that injects the fuel directly into the cylinder without a high-pressure fuel pump. To analyze the reliability of its unique fuel injection system, the cyclic injection rate is measured the Bosch method.