Specification:
 
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Outline Description

This specification is for a dual fuel Diesel / Natural Gas controller which enables a diesel engine to be fuelled with up to 90% natural gas and 10% diesel. The cost of fuel is often much reduced depending on the local market and also exhaust emissions are much less, often allowing a dual fuelled engine to operate where diesel engines are banned because of their emissions.

Mechanical

The controller is contained in cast and machined aluminium housing with the sealed electrical connector on the lower surface. The housing is sealed with “O” rings and is dust and waterproof. A hose-tail connector is provided for the Inlet Manifold Pressure.

Size 220 x 230 x 70 mm
Weight 2.3 Kg
Connector Deutsch DRC 23
IMAP Hose tail 5 mm ID hose
Mounting holes 4 on 217 x 141 mm grid

Electrical

Signal Inputs Range Typical Transducer measuring range
Inlet Manifold Pressure
(A pneumatic signal)
0 to 250 Kpa Absolute  
Storage pressure Transducer 0.5 to 4.5 Volts 0 to 25 Mpa
Gas Delivery Pressure 0.5 to 4.5 Volts 0 to 690 Kpa Absolute
Inlet Manifold Temperature 0.5 to 4.5 Volts -100 to +100 Degrees C
Gas Delivery Temperature 0.5 to 4.5 Volts -100 to +100 Degrees C
Engine coolant temperature 0.5 to 4.5 Volts 0 to 120 Degrees C
Drivers demand pedal 0.5 to 4.5 Volts 0 to 100%
Engine knock 0.5 to 4.5 Volts Knock sensing DSP chip
Substitution / Storage switch 0 to 5V Logic level with pull up
Record event switch 0 to 5V Logic level with pull up
Air conditioning switch 0 to 5V Logic level with pull up
Rack Stop Switch 0 to 5V Logic level with pull up
     
Outputs    
Proportional Gas valve 0V to supply Volts 10 A 0 to 10 grams per second

Gas lockoff solenoid on / off
Supply Voltage 2 Amps Regulated or HP gas
Error LED Supply Voltage 1K Ohm For drivers display
Out of gas LED Supply Voltage 1K Ohm For drivers display
Spare Supply Voltage 1K Ohm For drivers display
“Flowing gas” LED 0 to Supply Voltage External current limit reqd
Diesel rack stop stepping motor Supply Volts switching 1A Current limit 2 phase Stepping motor
IMAP Throttle control stepping motor Supply Volts switching 1A Current limit 2 phase Stepping motor
     
Environment    
Supply Voltage 12 or 24 Volts (5 ma
with ignition off)
Provides power for orderly shut down.
Ignition switch input 12 or 24 Volts Provides current to gas valve and shutoff solenoid
Load dump over Voltage protection 100 Volts Continuous
1000 Volts for 10 us
 
Ambient Temperature -20 to 50 degrees C  
Protection IP 67  
Mounting Location Vehicle body or chassis  

Designed and manufactured by: Solid State Equipment Ltd, Lower Hutt, New Zealand

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