|
|
There is currently only one ECU available - the Adaptronic 420. The current version is the e420c, which replaces the original e420b model. New versions will be brought out as new technologies become available and new needs become apparent.
Attribute |
e420b |
e420c |
Physical |
||
| Connectors | 1 16-way OEM style plug for triggering and low current
outputs 1 20-way OEM style plug for analogue and digital inputs 1 8-pin SIP connector for power and injector drives 1 6-pin SIP connector for high current auxiliary outputs 2 DE9 connectors for serial communications (one to connect to a PC/laptop, the other to connector to slave devices eg wideband oxygen sensor controller) |
|
| Physical Dimensions (mm) | 174 x 92 x 50 | |
| Mass | 0.4 kg | |
| Looms available | 0.5m long (for connection to existing loom) 2.0m long (for wiring directly to engine) Various plug-in looms (plug directly into factory wiring, contact for details) |
|
Sensor Interfaces |
||
| Crank angle sensor type | 3 programmable inputs, configurable as triggering ignition
timing, injector drive, ignition timing during cranking, or cylinder 1
marker. Reluctor and optical/Hall effect inputs, with configurable edge selection, internal pull-ups on optical/Hall effect inputs |
|
| Crank angle trigger waveforms | Sync / trigger / multitooth / missing tooth (versatile
programmability) Nissan optical Mitsubishi style with 2 sync pulses Virtually all factory triggering systems |
|
| Manifold absolute pressure input | 0 - 5V, 2-point linear calibration, range 0 to 400 kPa (requires external sensor, 5V supplied by ECU) | |
| Air, water and aux temp inputs | 4k7 pull-up (requires separate thermistor connected to ground), 8-point linearly interpolated calibration, range -127 to 127°C | 4k7 pull-up (requires separate thermistor connected to ground), 32-point linearly interpolated calibration, range -30 to 125°C |
| EGO input | 0 - 1V factory narrowband, or Bosch "wideband" -
input impedance 10 MOhm. Can connect 0-5V linearised sensor (eg PLX, M&W UEGO) to aux input Can connect 0-3V Zietronix sensor to analogue input Can connect M&W UEGO, TechEdge, Innovative to second serial port |
|
| Knock input | High impedance input, bandpass filtered | |
| Throttle position input | 0-5V (5V supplied by ECU), 2-point calibration | |
| Auxiliary digital inputs | 8 inputs, each configurable as active-high or active-low, 12V tolerant inputs | |
Actuator Interfaces |
||
| Number of injector drivers | 4 | |
| Injector driver waveforms | Full sequential Batch Semi-sequential every period or semi-sequential every second period Half/third/quarter speed full sequential Fire all at once every cylinder 1 (as on Swift GTi, Alpine Renault) Optional batch fire during cranking |
|
| Injector driver current | Optional constant current or peak-hold drive, selectable steady-state current of 0.5A, 0.9A, 1.5A or 1.9A | |
| Number ignition outputs | 3 (4 optional) | |
| Ignition output waveforms | Selectable as firing on rising edge or falling edge | |
| Ignition output type | Open-collector with 560Ohm pull-up (allows direct connection to OEM transistor or separate igniter box) | |
| Number of auxiliary outputs | 8: 4 high-current, 4 low-current | |
| High current outputs | Max current 7A (or 3A inductive), 3 of these PWM capable, PWM frequency selectable (23Hz - 2kHz) | |
| Low current outputs | Max current 200mA - suitable to drive relay coils | |
Control Characteristics |
||
| Map points | 512 - every 500 RPM (0 - 15500 RPM) and 1/15th of maximum load (TPS or MAP) | Same as e420b, but two ignition maps and two fuel maps. |
| Load determination | TPS or MAP | TPS or MAP TPS using 2nd map as MAP backup MAP using 2nd map as TPS backup Both maps MAP or TPS, digital input to select MAP and TPS map, digital input to select MAP and TPS map, use MAP on closed throttle, otherwise TPS Use max/min/average/sum (MAP, TPS) Read TPS from map and multiply by value in MAP table |
| Injector pulse width resolution | 0.7µs (0 - 44ms) | |
| Ignition resolution | 0.2° (0 - 51°) | |
| Dwell time resolution | 0.1ms (0.1ms - 5ms) Dwell time reduction for high RPM with high dwell time |
|
| Accelerator pump | TPS and/or MAP based (configurable proportionality) as well as
asynchronous accelerator pump (function of RPM) Works with TPS pot or switch - pot gives better performance |
|
| Fuel control strategies | Open loop, closed loop, and two adaptive modes (requires EGO sensor) - can run open loop above a specific MAP if required, target AFR can be set across rev and load ranges. | |
| Fuel correction | Open loop, engine temperature, air temperature, accelerator pump, post-crank enrich, cranking enrichment, WOT | As e420b, except that air temperature now has a temperature table rather than a fixed coefficient |
| Ignition control strategies | Open loop, closed loop and adaptive (requires knock sensor, alpha version only) | As e420b, but with temperature correction table for air temp and coolant temp |
| Idle control strategies | Open loop values for hot and cold (2 points) Target speeds for hot and cold (2 points) Throttle cracker (VSS increase and change to open loop) Extra for electrical load and aircon Post crank idle-up |
Open loop values with a 32-entry temperature table Target idle speeds with 32-entry temperature table Idle effort correction for air temperature Other corrections as on e20b |
| Main loop speed | 200Hz approx | |
Copyright 2002-2006 Andrew Wyatt. All rights reserved. Unauthorised copying of any material anywhere on this site explicitly forbidden unless prior arrangements have been made. Adaptronic is a registered trademark of Andrew Wyatt. Webmaster Jason Broadhurst.