Detroit Diesel DDEC VI Application And Installation page 345

5.25 THROTTLE CONTROL/GOVERNORS
There are two types of engine governors that are used with throttle controls. The engine
governors are:
□ The Automotive Limiting Speed Governor (ALSG) for torque control, typical governor for
on-highway applications (refer to section 5.25.1)
□ The Power Take-off (PTO) for speed control, typical governor for off-highway applications
(refer to section 5.25.2)
5.25.1 AUTOMOTIVE LIMITING SPEED GOVERNOR - ON-HIGHWAY
In on-highway applications and some nonroad applications, ALSG is the primary throttle source.
The throttle input in a ALSG sets percent load. The amount of fuel input to the engine is
determined by the throttle position. As the load on the engine varies the resulting engine speed
will vary between idle speed and governed speed.
ALSG Accelerator Pedal
The accelerator pedal (AP) sends an input signal which the ALSG uses to calculate engine power.
This assembly is also referred to as the Accelerator Pedal Sensor (AP Sensor) assembly.
ALSG Accelerator Pedal Installation
DDEC VI is compatible with an AP which has an output voltage that meets SAE J1843 and has
less than 5% of voltage supply closed throttle variability.
The AP is an OEM supplied part. Vendor sources may be contacted for additional design and
installation details.
NOTE:
An Idle Validation Switch is required.
All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION
DDEC VI ELECTRONIC CONTROLS APPLICATION AND INSTALLATION
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