Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 130
11.0 Engine Speed Demand
It is necessary to select a device that converts the speed requirements of the
engine operator or controller to an electrical signal recognized by the engine
ECM. There are five types of speed demand input:
• Pulse Width Modulation (PWM) Sensor
• Analogue Sensor
• Throttle lock (PTO mode) - also known as “engine speed cruise control”
or “set speed control”.
• Multi Position Throttle Switches (MPTS)
• Torque Speed Control - TSC1 (Speed control over CAN J1939)
The speed demand type must be carefully considered and appropriate for the
application.
There are two dedicated software input channels that can be configured to
accept specific types of speed demand inputs. The valid combinations and
throttle logic are given in the following diagram. PTO mode can be used with
Analogue/PWM combinations; it cannot be used with multi position switch.
The J1939 TSC1 parameter will override any speed demand input when
broadcast. Droop is applied to the requested desired engine speed only when
All Speed governing is selected.
Figure 11.1 Engine Speed Demand Software Control
PWM Engine Throttle
ANALOGUE Engine
Throttle with IVS
MPTS (Multi Position
Throttle Switch)
Throttle Type Selection and Number of Throttles
(One throttle type selected for each channel)
Demand
Validation
Droop
Throttle 1&2
Arbitration
Overall
Arbitration with
other speed
demands
Mode Selection (including
Droop Value, High Idle,
Rated Speed and Gov
Selection)
Throttle Lock
(PTO mode)
Ramp Rates
TSC 1
PWM Engine Throttle
ANALOGUE Engine
Throttle with IVS
MPTS (Multi Position
Throttle Switch)
Demand
Validation
Droop
Throttle
Channel
2
Throttle
Channel
1
Desired Engine Speed