Delphi Multec 3.5, Руководство по применению

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Multec 3.5 Fuel Injector Application Manual Product Description
Delphi Energy and Chassis Systems Revision: 11/05-1 3-21
3.8
Injector Targeting, Placement and Cone Angle
Figure 3-10 - Injector Targeting
This section is intended as a guideline to proper injector placement and
spray selection. These guidelines are general recommendations that may
not apply to all applications. An injector spray development plan
including engine emissions, and driveability should be performed in order
to confirm the injector selection performs optimally in the intended
application. More detailed information about injector spray measurement
can be found in the SAE recommended practice for injector spray (J-2715)
which was in the approval process at time of writing and may currently be
available.
3.8.1 Targeting
Generally, the goal is to target the fuel spray so that it uniformly covers
the intake valve with little or no wall wetting within the target path. Spray
impinging on the hot intake valve of a warmed up engine will readily
vaporize. Cold start strategies for reduced emissions may require alternate
spray targeting schemes. Delphi has extensive spray visualization and
measurement capabilities to help determine the optimum spray targeting
for an application. Involvement early in the engine / intake design process
provides the maximum flexibility to locate the injector tip for best spray
targeting. See your Delphi representative for details.
The customer should define any specific limits on the wetted manifold and
valve area. (Reference Figure 3-10 for typical injector spray targeting.)