Fuel injection control device for diesel engines

摘要

A fuel injection control device for diesel engines that enables reduction of amount of soot in the exhaust gas and suppression of noise without decrease in fuel efficiency includes: a fuel injector that injects fuel directly into the combustion chamber of the diesel engine; a main injection control means that controls the main injection of fuel from said fuel injector at a specified time near the top of the compression stroke; and an after-injection control means that controls the after-injection of added fuel from said fuel injector after said main injection, said after-injection control means controlling the injection time of after-injection based on the time at which the combustion by said main injection is complete and also increasing the fuel injection by said after-injection during an acceleration state wherein the acceleration is larger than a specified value more than when the acceleration is lower than the specified value.