Electronic Speed Governors
The Principle Of The Electronic Governor System
Electronic governor, with its simple structure, high reliability, convenient operation, easy function extension
and high cost performance, applies to all kinds of diesel generating sets, vehicles and diesel engines.
Its normal type is all-electronic single pulse speed and close loop position structure, provided with functions
of non-corresponding or corresponding control, speed and rated speed during running maximum fuel supply
control, emergency stop and etc.
It is also capable of adding other control functions according to the customer's particular requirements.
2.1.2 The outline and installing size of the C2002 speed control unit
The speed control unit is installed on the control box or fixed other peripheral equipment in the engine. It
should be installed in the place of air drying and temperature suitable. If it be installed in the place of more water
and humidity, the speed control unit should be mounted vertically. Its outline and installing size refers to figure
2.1.3 Connection diagram of the C2002 speed control unit
2.1.3.1 C2002 speed control unit's connection diagram for normal generator set refers to figure 2.1.3.1
The Electromagnetic Actuator connects to Terminals 1 and 2 and battery connects to Terminals 5 and 6.
Terminals 1, 2, 5, and 6 should be #16 AWG (1 mm sq) or larger. Long cables require an increased wire size
to minimize voltage drops. The battery positive (+) input, Terminal 6, should be fused for 15 amps as
illustrated.
Magnetic speed sensor connects to Terminal 3 and 4 MUST BE TWISTED AND/OR SHIELDED for their
entire length. The speed sensor cable shield should only be connected to Terminal 4. The shield should be
insulated to insure no other part of the shield comes in connect with engine ground, otherwise stray speed
signals may be introduced into the speed control unit to stop the engine.
The remote potentiometer connects to Terminal 7 and 9. If it resistance is 5K , speed adjusting range is
2400HZ.
Speed droop connects to Terminal 10 and 11. When the Terminal 10 and 11 is off, speed droop is 0; When the
Terminal 10 and 11 is closed, speed droop range is 0-5%.
Rated and idle speed switch connects to Terminal 7 and 12. The switch close for idle, the switch off for rated
speed.
Terminal 13 receives input signal from load distribution device, automatic synchronizer device and other
governor system auxiliary device.
Terminal 14 output +10 volt regulated supply.
2.2 The Electromagnetic Actuator
The Electromagnetic Actuator is the executive element of the electronic governor. ESG2002 series speed
control unit that is single-loop control mode can matching all kinds of electromagnetic actuator, such as
A800C-W,A900C-W,A1000C-W-d1,A2000C-W-d1,A08A-W,A1AWL,A1AWT,A3A-W,A3B,CA2-W.
The following introduction can be divided into external and internal type respectively according to the
actuator of the installation.
2.2.1 Internal type Actuator
Internal installation refers to the electromagnetic actuator part instead of the high pressure oil pump
mechanical governor attached directly to the high pressure oil pump body as an organic whole, internal actuator
rack and the high pressure oil pump rack and linkage. Actuator external parking hand handle, and can be realized
by adjusting the handle is the location of the parking of the bulk oil limited. ESG2002 series can match internal
actuator such asA800C-W,A900C-W,A1000C-W-d1,A2000C-W-d1,A08A-W,A3A-W,CA2-W.