Maintaining the highest manufacturing quality and reliability of more sophisticated ECU’s 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.

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 S60 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).

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

S40 PRO

Engine management in the digital age