AN ELECTRONIC-HYDRAULIC IJNIT INJECTOR FOR A RAPID COMPRESSION BACHINE

Abstract

An electronic-hydraulic unit injector was developed for the study of diesel combustion with a rapid compression machine. The injection system is composed of three elements; a newly designed unit injector with a pressure intensifier, a fuel supply module and a hydraulic control module. Injection pressure can be easily varied from 30 to 120 MPa and injection duration is electronically controlled from 2 to 5 ms with two hydraulic servo-valves. This injector realizes a constant rate of injection during the injection process. The combination of this injection system and a rapid compression machine offers a basis for the systematic study of the effect of injection pressure.