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S40Pro
           
  Maintaining the highest manufacturing quality and reliability of more sophisticated ECUís in the S series range it provides a lower priced solution for a wide range of applications.

The primary aim of the S40 is to provide an economic ECU for relatively simple wasted spark four cylinder engines using semi-sequential injection.

Essential features are not sacrificed to this aim and still maintained are important auxiliary functions to allow this unit to be used on road vehicles where required.

The S40 PRO is also available in an ignition only version.

ECU Functions

Engine Configuration
- 20,000 rpm capability
- Flexible and easily adapted to different OEM, crank, cam sensor arrangements
- Genuine four and two stroke support
- Twin injector engines
- Semi - sequential injection
- Wasted spark or distributor
- User controlled fan activation
- Sensors can be calibrated individually with a lot of preset options supplied
- Flexible Tacho Output
- Soft and hard rev limits

Main Fuel and Ignition Functions
- Comprehensive start up fuelling options both time and temperature dependant
- Air, coolant and manifold pressure compensation maps
- Throttle transient increase compensation
- Throttle transient reduction compensation
- RPM and load breakpoints can be calibrated by the user
- Throttle or MAP as load
- All maps with one or two dimensional with interpolation as required

Lambda control functions
- Extensive lambda parameters table to ensure stable closed loop operation and emissions requirements can be met where needed
- Full three dimensional lambda target map
- Auto-tuning function

Turbo Control Functions
- Open or closed loop turbo pressure control via PWM valve
- Modify target turbo pressure by gear selected
- Modify target turbo pressure by vehicle speed
- Two control maps selected by switch on dashboard
- Active base PWM map for easy calibration

Idle Control Functions
- Open or closed loop idle speed control via PWM valve
- Closed loop idle target speed temperature dependant
- Active base PWM map for easy calibration
- Fuel enrichment table calibrated versus PWM percentage

Flexible Input/Output
Three uncommitted input tables which use 0 5 volt inputs or any input the S40 knows already, linked to fuel and advance modifiers and a PWM output.

Launch Control
- Fully flexible first gear launch capability
- Extensively tunable to individual vehicles

Full Throttle Gear Shift Cut
Shift cut capability with 1ms resolution, variable for each gear with full switch de-bounce capability.

Voltage Compensation Tables
User configurable voltage compensation tables for injector dead time and coil on time (dwell time).

Firmware
The ECU firmware is flash upgradeable via the serial port with a special calbe and software. Current firmware and software published on www.alons-autosport.nl.

CAN PC Communications
The ECU can communicate with the PC via our USB -> CAN converter. This solves the problem of unreliable USB -> RS232 converters.

Diagnostics and Test Features
- Full sensor diagnostics and fault recording
- Extensive engine run time recording at different load and speed conditions
- Ability to exercise injectors and coils without engine running for fault finding

Other Features
- Sealed Latching Connectors
- Size 115 x 100 x 41 mm
- Weight 268 gm
- All outputs protected against over temperature and over current
- Inputs protected against severe wiring mistakes and accidents
- Reverse battery protection
- Alternator load dump protection

Input and Output Features

Inputs
- Crank Shaft (Magnetic Only)
- Throttle Position
- Coolant Temperature
- Air Temperature
- Manifold / Barometric Pressure
- Lambda
- Oil Pressure
- Fuel Pressure
- Oil Temperature
- Battery Volts
- 3 x User Defined Analogue (Shared Use)
- Launch Switch
- Shift Cut
- Undriven Wheel Speed

Outputs
- 2 x Coil Drivers
- 2 x Injector Drivers
- Tacho
- Fuel Pump Relay
- Fan/Aux 2/Turbo Pressure Valve (Shared Use)
- Idle Valve (Shared Second Injector Driver)
- Shift Light