Delphi Multec 3.5 User Manual

Multec 3.5 Fuel Injector Application Manual Fundamentals
Delphi Energy and Chassis Systems
Revision: 11/05-1 2-23
Figure 2-5 - Fuel Pressure Regulator and Gain Calculation
2.4 Impact of Emissions Requirements
2.4.1 The Impact of Emission Requirements on Fuel Control
Systems
For vehicle applications with more stringent legal exhaust emissions
limits, a closed-loop fuel control system with a catalytic converter may be
required. To ensure that the catalytic converter is operating at maximum
HC, CO and NOx conversion efficiency, the warm engine air/fuel ratio
must be very accurately controlled to stoichiometry.
Added control of the air/fuel ratio is made possible through feedback from
the oxygen sensor (see Figure 2-6), which measures oxygen concentration
in the exhaust. The maximum benefits of both the added air/fuel ratio
control and the conversion of emissions in the catalyst are only realized
after both the oxygen sensor and the catalyst are within their respective
operating temperature ranges. Refer to Figure 2-7.

Delphi Multec 3.5 Specifications

General

Brand	Delphi
Model	Multec 3.5
Category	Laboratory Equipment
Language	English