Abstract
Due to calls for the protection of the environment and soaring oil prices, requirements in the automotive industry increasingly focus on lower emissions and lower fuel consumption. The major technical issues that must be faced to meet these requirements in gasoline direct injectors are shortening response time, designing to withstand variable fuel pressures and optimizing the atomization of fuel spray. This paper describes our development of a gasoline direct injector using a hammering needle valve drive system to solve these three technical issues.
