XMS4 - XTREME MANAGEMENT SYSTEM V4

 

The XMS4 (Xtreme Management System V4) stand-alone product range, consists of twelve fully comprehensive stand-alone engine management systems. You will be able to choose from three groups - A, B and C and each group offers four different variations.

This is the most economical XMS4 unit in the range. It is ideally suited for 4 cylinder engines and available with:
2/4 2 Amp direct injection drivers
2/4 Ignition signal outputs2 Set-point outputs More: The unit can pack a maximum of 4 x 2Amp injector drivers, optional 2.8bar Manifold Pressure sensor, a maximum of 4 ignition signal outputs, and a turbo BOOST controller. The RPM range exceeds 10000 on certain input trigger types. The unit operates from two manual or automatically switched master maps; each map consists of up to 2000 sites. Ignition and injection is sequential, but dependent on amount of cylinders and availability of a CAM sensor.

Although being the smallest unit, it packs all LETRIPP software features, but is limited to less hardware. If you don’t need all the fancy hardware, then this is the unit for you.
SUMMARY OF FEATURES

• 8 Direct injector drives, up to 6 Amp each
  
• Ignition for 4, 6, 8 cylinders, wasted spark
  
• Sequential ignition for 4 cylinders
  
• Positive active ignition output to suit most commercial drivers
  
• Acceleration enrichment with 16 Map sites
  
• Separate CRANK (CB1) and CAM (CB2) inputs
  
• Built-in Wide Band Lambda circuit for the Bosch LSU4
  
• Partial or complete closed loop lambda operation
  
• +5 Volt output to power manifold pressure, temperature sensors, TPS, etc.
  
• Electronic boost control
  
• 8 Auxiliary outputs
  
• 16 Setpoint functions
  
• Each setpoint has a high/low limit
  
• Each setpoint can be linked to ONE other setpoint
  
• Two-layer fault and condition indication: Group and Items
  
• Driving history recorded in minutes per main map site
  
• Firmware can be upgraded in the field
  
• Has 2 complete maps of everything
  
• All inputs can be calibrated to suit the factory sensors
  

FEATURES OF THE XMS IN MORE DETAIL

1. FUEL INJECTION

8 Direct injector drives, up to 6 Amp each Sequential injection, batch sequential and parallel by wiring Individual injector trimming Max injection time per injector is 40ms Max duty cycle is 100% (continuous ON) 128 Main map sites for throttle and RPM 16 Sites for manifold pressure 16 Sites for Engine temperature Other fuel components: Acceleration, Battery compensation, Lambda Priming for easy starting Idle control, 2 wire and 3 wire Lambda loop control: Narrow or wide band, partial to full control

2. IGNITION

4 Ignition outputs requiring an EXTERNAL driver Wasted spark output configuration for 4, 6 and 8 cylinder engines Sequential 4 cylinder spark control Sequential 5 cylinder spark control for Audi and Volvo Positive active output to suit most commercial drivers 128 Main map sites specifying ignition angle in degrees 16 Manifold pressure sites 16 Air temperature sites 16 Dwell sites (by RPM) Ignition fault input from external driver Total ignition: main map entry in degrees +- Manifold pressure entry +- Air temperature entry  more...

3. TRIGGER INPUTS

Separate CRANK (CB1) and CAM (CB2) inputs All inputs balanced (floating) for extra noise immunity Inputs can be configured for unbalanced high threshold level Missing tooth or CAM cylinder identification Multiple teeth trigger from 18-60 teeth per turn Optional Single tooth trigger modes - for fuel only

4. WIDE BAND LAMBDA

Built-in Wide Band lambda circuit for BOSCH LSU4 Partial or complete loop operation Display in AFR Warning of probe error (warm up, temperature, limits, etc.)

5. NARROW BAND LAMBDA

• Standard 0-1V input
  
• Partial or complete loop operation
  
• Display in AFR
  

6. BOOST CONTROL

• For Turbo boost solenoid control
  
• 16 Manifold pressure target sites
  
• 16 Target adjustment sites
  
• 16 Base PWM sites for low to medium throttle
  
• 16 Base PWM sites for high throttle
  
• Response time control and target RPM settings.    more...
  

7. PRIME (FUEL)

• 16 Sites accessed by Engine Temperature allow extra fuel during starting
  

8. IDLE CONTROL

• For direct connection to 2 wires and 3 wires idle motors
  
• Target RPM setting with 16 Engine Temperature settings
  
• 16 PWM sites to control idle motor
  
• Response time setting
  

9. SETPOINT CONTROL

• 16 Setpoint functions
  
• 8 Relay drive outputs capable of 1 Amp for output activation
  
• Each setpoint has a high/low limit
  
• Each setpoint can be linked to ONE other setpoint
  
• Linking via “AND” or “OR” logic
  
• Each setpoint can generate an “engine fault” indication
  
• Hard or soft fuel cut on 8 setpoint functions   more...
  
• Functions can be assigned to a pin
  

10. FAULT INDICATION AND CONTROL

• 128 Fault detection points
  
• Each fault can be enabled/disabled
  
• 16 Possible group faults such as fuel, ignition and injection
  
• Group faults are reported “on-line” and cause the corresponding display to go red
  
• On-board fault indication LED
  
• Facilitates very easy installation
  

11. HISTORY RECORDING

• Driving history is recorded in minutes per main map site
  
• Reset, clear and up-load facility
  
  

12. ON-BOARD MAP SWITCHING

• 2 Separate complete tune maps
  
• The maps (A, B) can be switched while driving
  
• Each map holds close to 2000 tune points
  
• The maps are protected against power failure
  

13. LAUNCH CONTROL

• Extra switch input
  
• Proportional retard above a preset RPM limit
  
• Retards up to -40 degrees
  
• Reduces fuel when RPM limit is exceeded by 500RPM
  

14. EXTERNAL SUPPLY TO SENSORS

• +5 Volt output to power manifold pressure, temperature sensors, TPS, etc.
  

15. UPGRADING

• Can be upgraded in the field. The latest firmware version can be downloaded from the website to “re-flash” the unit.
  
• Upgrades are available via the internet
  
• Upgrades are protected and version controlled
  
  

16. CONSTRUCTION

• Non-encapsulated and requires installation in the cabin
  
• Aluminium casing, anodised and shielded
  
• Size 90 x 230 x 16 mm
  

17. ON-BOARD DISPLAY

• 1 Power LED
  
• 8 Indication LEDs:
  
  • FAULT
    
  • CRANK ACTIVITY
    
  • CAM ACTIVITY
    
  • 5 Ignitions per cylinder activity
    

18. PRE-PROGRAMMED OPERATIONS

• Holds 32 different engine set ups for CRANK and CAM triggers
  
• Ideal for using the standard engine sensors
  
• No need to modify pick up points
  

19. SOFTWARE FUNCTIONS

• 7 Maps
  
• Different on-line displays
  
• 2 Tune maps, can be switched while driving
  
• Close to 2000 tune points per map
  
• Quick-save Tune map operation
  
• The HELP manual is linked to the tune screens for quick reference
  
• Each sensor input can be customized and calibrated to any sensor
  

20. ON-LINE HELP

• The manual is available with the software
  
• Ideal for installation
  
• Ideal for tuning
  

21. WINDOWS HELP GUIDE MANUAL

• Step by step guide for software operation
  
• Available on CD
  

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