Electrical Interface; Electromagnetic Compatibility; Wire Routing - Delphi Multec 3.5 Applications Manual

Multec 3.5 Fuel Injector Application Manual

Electrical Interface

4.4
4.4.1

Electromagnetic Compatibility

4.4.2

Wire Routing

Caution
Caution
Delphi Energy and Chassis Systems
Generation:
The Multec 3.5 Fuel Injector should not produce any objectionable RFI in
AM, FM, and CB bands. EMI/RFI can occur in two ways: radiated
through surrounding air and conducted through connecting wires.
Suppression of the EMI occurs in the injector driver circuit Zener diode.
Susceptibility:
The fuel injector should be isolated in such a manner that other electrical
components cannot induce excess interference (EMI/RFI) levels into the
injector's controls.
EMI/RFI measurements should be made at the vehicle level using the
appropriate engine controller, injector drivers, and wiring.
Electrical wiring to the injector should be routed so that conductors are
protected from excessive heat, damage, and wear.
Avoid unnecessary handling (disconnecting and connecting) of the
electrical connector.
The wiring should be of a gauge sufficient to handle the required injector
current without causing a significant voltage drop over its length.
Wire lengths should be sized appropriately to prevent side loading the
connector which can cause electrical disconnects:
• Strain on the connector due to wires that are too short
• Excess length that could allow alternate unintended wire routings that
could place strain on the connector.
• Wiring that could become pinched between components during assembly
possibly leading to a short circuit and full-on injector condition.
Do not share injector wiring with other components. Dedicated wiring is
required. For other types of applications consult a Delphi application
engineer.
System Interface
Revision: 11/05-1 4-9