Doni Radhianto & Partners

The issue on 50 micrometers on injector orifice, we get from the paper by J.B. Woodford and G.R. Fanske of Argone National Laboratory under the title the fabrication of small-orifice fuel injectors.

The paper entitles the fabrication of small-orifice fuel injectors also discusses the benefits of injector with orifice diameter 50 micrometers. Particular matter is eliminated by reducing the orifice diameter up to 50 micrometers. For us, as a designer, this is a challenge. With 50 micrometers in diameter, orifice will be sensitive to the blockage (clogging).

Can the next generation common rail fuel injection system really be applied in 50 micrometer-diameter orifice and bio-diesel fuel? To answer this question, we will not lead you to “yes” or “no” answer. Rather, we will explain various factors related to this problem.

Several years ago, we have started to design the next generation common rail fuel injection system for diesel engine. Exactly, when diesel-based car using common rail fuel injection system is started to be marketed in Indonesia.

The common rail fuel injection system in diesel car potentially make diesel engine is more environmental-friendly and comfortable to that using jerk-fuel injection system. However, in addition to such an excellence, the common rail fuel injection system needs better quality of fuel. In Indonesia, better diesel fuel has not available in many places yet.

The common rail fuel injection system in diesel engine is a system that enables diesel engine to run more eco-friendly than other types of fuel injection systems. However, it is not enough. Engineers has still put their efforts to make the much more eco-friendly system. One of them is by minimizing orifice diameter. Consequently, the orifice will be easily clogged. To avoid such a clogging caused by some solid particles, we may use better filter.