Fuel Injectors & Pumps – Section 1 Introduction

Generated on 10-13-2008

Section 1

This technicians guide explains the fuel injection system operation in current on-highway, four-cycle Detroit Diesel®Corporation engines. Series 50®, Series 60®, MBE 900, and MBE 4000 engines are the models covered in this guide. The main emphasis of this guide is on the unit injector and the unit pump.‪

The heart of the diesel engine is the fuel injection system. It has the vital function of communicating with the Electronic Control Module (ECM) and pumping a measured quantity of fuel into each cylinder at precisely the right moment. This is achieved by Detroit Diesel Corporation’s electronic control technology: Detroit Diesel Electronic Controls (DDEC®). The unit injector does all this with simple design and few parts. The benefits are low unit cost and minimal maintenance cost. The advantage of the 30,000 psi fuel injection pressure capability is high velocity injection which translates into excellent penetration and atomization. As a result of the ability to control injection spray, exhaust emissions and fuel consumption parameters are optimized. These features help make the most efficient use of each ounce of fuel, minimizing smoke, NOx, and HC emissions.‪

1.1 Diesel Fuel System Overview

Unit Fuel Injectors and Unit Pumps Technician's Guide - 7SE500
Generated on 10-13-2008

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