Thread: EFI Idle issues
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EmptyGarage EmptyGarage is offline
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Join Date: Jul 2009
Location: Nova Scotia
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I dug up some of the EMS specifications, the idle Control Functions first:

DTA
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.




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.
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S80 PRO

The S80 and S100 ECUs represent the top of the range, differing only in the number of individual coils and sequential injectors they can handle.

Comprehensive input and output features are provided allowing sophisticated 6, 8 , 10 and 12 cylinder engines to be controlled easily and successfully.

An extremely high level of environmental protection has been implemented in its design allowing safe use in extreme conditions such as grass track, off road, marine and motorcycles.
s80_ecu
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 spark engines.
Twin injector engines.
Sequential or grouped injection.
Individual coils, wasted spark or distributor.
Unequal coil firing capability.
Unequal injection angle capability.
Delayed sequential injection.
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

Two main fuel, spark and turbo maps selected by a dashboard switch.
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.

ALS Control Functions

Full ALS ignition and fuel maps.
ALS valve control together with map switching controlled
by dash board switch.

Cam Control Functions

Open or closed loop cam advance control via PWM valve.
Static offset table to zero out electrical movement effects.
Active Cam Target Advance map, load and speed dependant.
Active base PWM map for easy calibration.
VTEC Control

Water Injection

When not being used to control the camshaft, cam base PWM map can be used instead for water injection, giving complete load and speed dependence.

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.

Traction Control

Fully adjustable from the dashboard.
Measured from all 4 wheels

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 cable and software. Current firmware and software published on www.dtafast.co.uk.

CAN PC Communications.

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

Data Logging

Up to thirty six separate items can be logged.
Three user selectable logging frequencies.
Up to 16 hours logging capability.
Graphing can be done on-line to the ECU.

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

Waterproof Enclosure
Sealed Latching Connectors
Size 134 x 240 x 46 mm
Weight 1130 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 and Hall Effect)
2 x Cam Shaft (Magnetic and Hall Effect)
Throttle Position
Coolant Temperature
Air Temperature
Manifold / Barometric Pressure
2 x Lambda
Oil Pressure
Fuel Pressur
Oil Temperature
Battery Volts
3 x User Defined Analogue (Shared Use), 1 x User Defined Switch
Launch Switch, 2 x Traction Control Switches
Shift Cut
4 x Wheel Speed
ALS / Second Map Switch



Outputs

8 x Coil Drivers
8 x Injector Drivers
Tacho
Fuel Pump Relay
Fan
Turbo Pressure Valve
Turbo ALS Valve
Cam Control Valve
VTEC Valve
Idle Valve
Shift Light
5 x User Programmable Aux (Shared Use)
__________________
1986 930 EFI, twin plug, lovin the sport seats

Last edited by EmptyGarage; 10-15-2011 at 07:34 PM..
Old 10-15-2011, 07:31 PM
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