ZEST BOLT Service Manual

ENGINE 1.3L QUADRAJET (90PS) 113 3A.1.8.4.3 OPERATION PERFORMED BY EMS A. INTRODUCTION : OPERATING STRATEGIES The Common Rail system makes it possible to carry out two pilot injections before T.D.C. with the advantage of distributing the pressure in the combustion chamber more evenly and reducing the combustion noise typical of direct injection engines and up to two injections after the main injection with the advantage of reducing emissions. The control unit controls the quantity of fuel injected, regulating the line pressure and injection times. The control unit processes the following information to control the quantity of fuel to inject : Q engine rpm; Q coolant temperature; Q supercharging pressure; Q air temperature (from flow meter); Q intake air quantity; Q battery voltage; Q diesel pressure; Q accelerator pedal position; Q diesel temperature; Q Lambda signals. FLOW OF INPUTS AND OUTPUTS