July 25, 2002
Direct-Injection Turbo Engine Put into the First Practice for the Minicar Category, Which Has Been Certified as U-LEV (Ultra-Low Emission Vehicle) * .
Suzuki Motor Corporation has put into practice the direct injection turbo engine for the Minicar category in Japan (under 660 cc piston displacement). This type of engine adopts the fuel injection device which injects gasoline directly into the combustion chamber.

The direct injection engine has been put into the first practice as a gasoline engine for the Minicar, and has been certified as U-LEV for the first time as a Minicar turbo engine. Though the engine is used for 658 cc displacement vehicles, it possesses high output (47kW, 64PS max.) and great performance in exhaust gas cleaning.

Suzuki analyzed the flow of air and gasoline inside the combustion chamber by the use of the simulation software named "GMTEC" by General Motors. Suzuki determined the angle and speed of the fuel injection, and the shape of the piston and combustion chamber. Eventually, we successfully formed the low-stratified air-fuel mixture distribution, which indicates that the air-fuel ratio around the ignition plug is high and that of the outside periphery low. The stratification of air-fuel mixture contributes to the improvement in combustion stability and the reduction of unburned gas. It also enables the introduction of a mass of EGR (Exhaust Gas Recirculation) Gas, which realizes a rise in fuel economy.

* This is the highest certification under the certification system by the Japanese Ministry of Land, Infrastructure and Transport. It was inaugurated in April. 2000 to promote the penetration of low-emission vehicles through their selection by ordinary consumers. U-LEVs, E-LEVs and G-LEVs are low-pollution vehicles that reduce nitrogen oxide (Nox) and hydrocarbon (HC) emissions by an additional 75%, 50% and 25% respectively, from the levels required by Japan's 2000 exhaust emission regulations.