Overview and Specifications

OverView.
The Autronic SMC Sequential Engine Management System is a compact engine management control for all engine performance upgrades.

A user friendly "IBM" compatible laptop program allows the user to select the degree of sophistication required for each application. This program, in combination with intelligence within the management system, allows the user to select the finest calibration detail required to match the application, in absolute minimum of time.

This program provides the means of interrogating the engine management system enabling speedy diagnosis and calibration.

Usage.
These systems can cater for the requirements of virtually any spark ignition engine, including the following.
   i. High output supercharged or turbocharged engines, with either multi point and/or center point injection.
   ii. Rotary (Wankel) and two stroke engines.
   ii. Engines having uneven firing sequences such as 2 and 4 cylinder "V" configuration motor cycle engines and        V6 motor vehicle engines.
IMPORTANT:- Please note that this product is intended for high performance motor sport applications and compliance with statutory regulations when used on public roads cannot be guaranteed.

Features.
1.    a.   Eight injector drivers for full sequential operation on engines up to eight cylinders. May be set for              'semi-sequential' operation on engines having more than 8 cylinders. e.g:- 12 cylinder engine using               6 groups of 2 two cylinders.
       b.    All injector types catered for (0.9 ohm to 16 ohm coil resistance). Specify unit fitted with               optional high current injector drivers for 0.9 ohm or twin injector applications.

2. User choice of manifold absolute pressure or throttle position as engine load input. Internal absolute
    pressure sensor for simplified installation 0 to 200 kpa (0 to 29.4 PSI) and 0 to 300 kpa (0 to 44.1 PSI)     available from stock. 0 to 450 kpa (0 to 66.1 PSI) available on request.

3. Single coil distributor, twin coil distributor or muilticoil distributor-less ignition configurations are possible on     most engines.

4. Fitted with environmentally sealed connector the standard unit is splash proof. Units are available with double     environmental sealing for use in the most arduous of applications (e.g:- rally, off-road and marine).

5. Auxiliary output function that can be used for any of the following:
       i.  Closed loop (feedback), boost control for turbocharged engines with rpm and temperature            dependent calibration characteristic.
       ii.  Closed loop (feedback) idle speed control.
       iii. Control of engine cooling fan.
       iv. Programmable on/off control for solenoid or relay driving that operates according to engine speed             and load (eg:- can be used for gear shift control or light, over rev indicator, inlet camshaft timing             selection or control of a supplementary electric fuel pump that augments mechanical fuel pump             delivery at low engine rpm only).
       v.  Fuel used pulse output to electric or electro-mechanical counter with resolution of 0.1 liter (or use             with trip computer).
       vi. Or even more sophisticated control function such as servo control of auxiliary butterfly for             turbocharged applications requiring precise throttle control and minimum turbo lag.

6.  Exhaust oxygen sensor input for sensing air/fuel ratio. Connect either a Bosch narrow band O2 sensor or for       more demanding applications a Bosch wide band O2 sensor and Autronic Analyzer. The low cost narrow       band sensor requires no interface adapters or expensive air/fuel ratio meters, and offers moderate accuracy       and tolerance to leaded fuels. This function can be used to monitor air/fuel ratio during engine tuning or can       be used for feedback control of air/fuel ratio for applications requiring exhaust catalytic conversion (feature       available on request).

7.  Diagnostic/Error indicator of sensor or ECU fault conditions with memory for detection of intermittent fault      conditions. An external light may also be connected for remote indication of abnormal operation.

8.  Precise spark advance control strategy for both static and dynamic operating conditions.

9.  Unique calibration strategy allows accurate control of fuel delivery under both acceleration and deceleration.

10. User selectable spark and fuel delivery strategy for abnormal engine operation conditions to minimize        possibility of engine damage whilst still maintaining engine operation.. (eg:- over heated or over boosted).

11. Comprehensive limp-home functions with user selectable default settings that ensure engine operation can        continue after sensor failure has occurred.

12. Full compensation of engine control parameters for engine operation at any altitude (fuel delivery, ignition       timing and boost pressure).

13. Adaptive learning (with memory) to minimize the number of user setups required and to provide optimal       control of air/fuel ratio, boost pressure and idle stability.

14. Rev limiter with soft characteristic that uses a combination of fuel delivery and spark control.

15. Fuel pump safety shutoff. Pump stops 3 to 4 seconds after the engine stops.

16. Unit is ultra light weight/compact yet has sufficient drive capacity for high power continuous duty       applications. (one unit OK for all applications from motor cycle to large capacity twin turbo engines).

17. Optional interface unit to allow sequential operation without the need for separate crank/camshaft sensors or        special multi-sensor distributor.

Interface Requirements.

INPUTS
Sensors   1.    Ignition input Hall effect, (Also available for direct connection to magnetic reluctor type                        pick-ups).
               2.    No. 1 cylinder reference. (Also available for direct connection to magnetic reluctor type                       pickups).
               3.    Barometric pressure. (Internal to ECU).
               4.    Manifold pressure. (Internal to ECU).
               5.    Throttle position.
               6.    Intake air temperature.
               7.    Engine coolant temperature.
               8.    Exhaust oxygen. (or optional Wide Range Air/Fuel Ratio Sensor).
               9.    Idle mixture trim. (Internal to ECU and screwdriver adjustable from outside).

OUTPUTS
Main       1.    8 off injector driver. (Optional 2 injectors per driver).
               2.    Ignition output.
                      Open collector output to any of the following:
                                    1.   Single coil high energy ignitions: Bosch 7 pin, Mitsubishi 3 pin.
                                    2.   Autronic Capacitor Discharge Ignition.
                                    3.   MSD 6A etc..
                      (4 outputs are available allowing multi coil distrubtor-less ignition for applications on                       engines up to 8 cylinders).

Auxiliary  1.    Fuel pump/injector fuel shut off safety relay.
               2.    Multifunction on/off or pulse width modulation output for either:
                    i.    Engine cooling fan relay.
                    ii.   Idle speed actuator. (Variable duty cycle single pole type, eg:- Bosch).
                    iii.  Turbocharger wastegate control valve. (SEM, most OEM types or Autronic low or high                           capacity).
                    iv.  Turbocharger auxiliary butterfly control motor.
                    v.   General purpose duty cycle output with user define characteristic.
                    vi   Fuel used pulse output. (for trip computer function).

SERIAL I/O
               1.     Communications with "IBM" compatible computer for calibration, fault diagnosis.

Specifications.