Engine Fan Control - Navistar Body Builder

Engine Fan Control - Navistar Body Builder
MaxxForce 15
(2011)
Overview: Engine Fan Control
NAV_EFC_022311
Engine Fan Control
©2011 Navistar, Inc.
TABLE OF CONTENTS
General Overview: Engine Fan Control ...................................................................................... 1
Description and Operation ............................................................................................................... 1
OPERATION..................................................................................................................1
FEATURE INTERACTION...............................................................................................1
Programmable Parameters................................................................................................................ 2
Parameter Setup ................................................................................................................................... 2
Frequently Asked Questions ........................................................................................................... 3
Definitions/Acronyms ....................................................................................................................... 3
NAV_EFC_022311
Engine Fan Control
©2011 Navistar, Inc.
i
General Overview: Engine Fan Control
The Engine Fan Control (EFC) feature is designed to permit fan control configuration
for particular engine applications. The primary purpose of the engine fan is to allow
the engine to run at its regulated operating temperature increasing engine
performance. It is also used to assist in cooling the refrigerant for the A/C condenser.
Programmed fan control can reduce engine fan noise, fan loading on the engine and
improve fuel economy under certain operating conditions.
The following fan configurations are available:

12THX – Variable Speed Fan

12THT – ON/OFF

12THJ – ON/OFF

12WBR – Manual Fan Override Switch
This document will address unique EFC functionality for the MaxxForce® 15.
Description and Operation
Operation
The EFC feature operates automatically, with the exception of the optional manual
fan override switch. If the vehicle is equipped with a manual fan override switch, the
operator may activate the fan at 100% fan speed at any time. The manual fan override
switch is located in a switch pack on the instrument panel (if equipped).
Two types of engine cooling fans will be addressed in this document:

ON/OFF Fans – The fan turns ON (100%) and OFF (0%)

Variable Speed Fans – The engine fan speed is variable between engine
speed of 600 rpm and 1700 rpm and will also be dependent on the cooling
requirements of the engine.
Feature Interaction
The EFC feature interacts with the following engine features:
NAV_EFC_022311

MaxxForce Engine Brake by Jacobs® – The engine fan will be ON (100%)
when the engine brake level selection switch is set to level 3 and engine
brake is active.

Engine Speed Control, Power Take-off (PTO) – The engine fan will be ON
(100%) when the engine speed control, PTO feature, is active and the, Force
Fan On with PTO Active (9007), parameter is set to (1), Fan Always ON with
PTO.
Engine Fan Control
©2011 Navistar, Inc.
1
Programmable Parameters
The following programmable parameters are available with the EFC feature.
Parameters indicated as customer programmable can be adjusted differently than the
production assembly plant setting to meet the customer’s needs. If the parameter is
indicated as non-customer programmable, the parameter setting is preset from the
factory and can’t be changed without dealer authorization.
Parameter Value
Description
Possible Values
Engine Fan Control
Mode
This parameter determines the functionality of the engine fan
control (EFC) feature.
(9000)

If set to (1) – The feature includes:
1.
Cooling fan turns ON at 100% and OFF based on
engine coolant temperature.

If set to (2) – The feature includes:

Cooling fan varies its speed between 0% and 100% based
on engine coolant temperature.

Cooling fan turns ON at 100% if the engine brake level
switch is set to level 3 AND the engine brake is active (See
Note 1).

If set to (3) – The feature includes a two speed fan control
with the engine brake. (See Note 1).
0: Disable
Cust
Pgrm
Recommended
Settings
YES
This parameter
setting is chosen
based on the fan
type installed on
the vehicle.
Dealer only.
YES
Customer Chosen
YES
Dealer only
1: ON/OFF Control
2: Variable Speed
Fan Control
3: Two Speed Fan
Control
Note 1: While the engine cooling fan with engine brake
functionality is active, it is important to understand that although
engine brake performance will improve; fuel economy is
decreased.
Force Fan ON With
PTO Active
(9007)
It may not be desirable to have the cooling fan cycling ON and
OFF during engine speed control, PTO operation; therefore this
parameter can be used to keep the fan engaged at all times while
PTO is active.
0: Auto Control
1: Fan ON with PTO
This parameter could be useful, for example, if a hydraulic lift is
used and engine cooling fan engagement may cause the boom to
move.
Enable the Fan ON
with Engine Braking
Feature
(9014)
This parameter allows the fan to be enabled with the MaxxForce
Engine Brake by Jacobs®.
0: Disable
1: Enable
Parameter Setup
This section describes only a few possible applications of the EFC feature and how
the programmable parameters can be effectively configured for each application.
This is not a comprehensive list, and does not include all possible applications that
an owner/operator might encounter.
Please review the description and operation section and the programmable
parameters for a better understanding of how the various engine parameters and the
idle shutdown timer mode might be best configured for your vehicle.
NAV_EFC_022311
Engine Fan Control
©2011 Navistar, Inc.
2
Possible applications for the fan include.

Manual fan override – An additional manual fan override switch is
required.

MaxxForce Engine Brake by Jacobs® assist – A programmable parameter
allows the cooling fan to act as an additional engine brake to assist in
slowing down the vehicle.
Frequently Asked Questions
How will turning on the cooling fan help my engine brake?
The engine cooling fan takes away horsepower while engaged. Turning on the fan
during engine brake operation helps the vehicle slow down faster.
Definitions/Acronyms
The following terms are referenced in this document:
Acronym
ECM
Definition
Engine Control Module
ECT
PTO
Engine Coolant Temperature
Power Take-off
NAV_EFC_022311
Engine Fan Control
©2011 Navistar, Inc.
3
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising