Optimized Nozzle with Rubber Seal Demonstrates Durability and Reduced Leakage: The mixer-type LPG fuel system has been replaced with a multi-point fuel injection system to comply with the emissions regulations and to compete with gasoline engine counterparts. Engineers at Aisan Industries report their development results for an LPG fuel injection nozzle. As a result of the development, the leakage inside the LPG fuel injection was minimal for 500,000 km, and the change in fuel injection characteristics was within design tolerances. The chapter consists of 9 pages including 10 figures and 2 tables.