Smc Autronic.pdf

AUTRONIC SMC

LAPTOP CALIBRATION / DIAGNOSIS SOFTWARE RELEASE 3.27/3.29

The software utility supplied with Autronic SMC ECU may be used with

any IBM compatible computer that in operating under MS-DOS, Win 95, 98, ME, XP.

The computer must have the following hardware:-

i. VGA graphics adaptor.

ii. Minimum of 2MB random accesses memory.

iii. One serial communication port.

iv. One 3.5" any capacity or 5.25" high capacity floppy disk drive.

The following functions are available using this program:-

1. Real-time display of the current operating status of the ECU and engine.

2. Display of error/fault condition history information recorded in the ECU and the

cancellation of stored error history.

3. Display of the relative timing of the engine position reference signals for ease

of setup.

Calibration adjustment:-

i. Non-interactive calibration of the ECU. (Off-line calibration editing).

ii. Interactive calibration of the ECU (online calibration editing).

iii. Disk file storage and retrieval of calibrations.

iv. Free transfer of calibrations between file, screen and ECU.

v. Calibration process does not effect normal ECU operation i.e.:- No hiccups during

online adjustment.

vi. Calibration may be password secured in ECU to prevent unauthorised access.

vii. User I.D. may be included with calibration in ECU for ease of future

identification.

The calibration features accessible with this version of the program are as listed below.

All tabular calibrations may have a user selected table size from 1 X 1 = 1 variable up

to the maximum specified for each table. The program allows calibration tables (or maps)

to be defined with variable spacing of the calibration grid points. Mapping detail can be

fine where engine characteristics vary dramatically and course where engine

characteristics are well behaved. This ensures that precise calibration is achieved with

a minimum of effort. Variable mapping precision if achieved by allowing arbitrary choice

of the calibration axis site values. The program allows the building of larger tables by

the insertion of table rows and for columns, as more calibration detail is required.

Calibrations, other than the base fuel and ignition tables, may-be initialised with

default values to eliminate the complexity of these enhanced features in applications

where only the basic features are required.

BASE FUEL DELIVERY CALIBRATION

Basic fuel delivery calibration table providing fine (0.1%) adjustment of fuel. This

table, the engine "load", barometric pressure and corrections dependent upon intake and

coolant temperature, acceleration and deceleration and external trims determine the

actual rate of fuel delivery for all engine operating conditions. The table data values

being a representation of the engines "Volumetric efficiency" allows considerable

simplification of the calibration procedure. Up to 32 engine speed and 16 engine load

dependent calibration sites may be chosen at random calibration intervals giving up to

512 adjustment points. The engine load variable used in this table and others that follow

below is a function of throttle position if throttle position is chosen as the primary

input and a function of manifold absolute pressure if pressure is the primary input.

BASE IGNITION TIMING CALIBRATION

Basic ignition timing calibration table for "normal" engine operation, excluding

cranking, idling and over-run conditions. The table uses the same site calibrations as

the base fuel delivery table and therefore is of equal size. Timing is selectable in 0.25

Degrees increments over a range from 0 to 50 Degrees crank angle. The calibration from

this table is combined with temperature dependent corrections and. an external trim to

produce the actual engine "running" ignition timing.

OVERRUN IGNITION TIMING CALIBRATION

Engine speed dependent ignition timing calibration for stable combustion

under closed throttle conditions. The adjustment range is the same as the

base ignition timing calibration table above. The table comprises a single

row using the same engine speed calibration sites as the base fuel delivery

table above.

CRANKING IGNITION TIMING CALIBRATION

Ignition timing for engine cranking calibration allows the selection of an engine speed

dependent timing characteristic that minimizes the possibility of starting gear damage

due to engine kick-tack yet aids in the rapid acceleration of the engine up to running

speed. The range of calibration is as for the bass ignition table and up to 5 engine

speed calibration sites may be chosen.

IDLING IGNITION TIMING CALIBRATION

Idling ignition timing calibration allows optimal timing during this condition for good

idle quality and improved idle speed stability. The range of calibration is as for the

base ignition table and up to 5 engine speed calibration sites may be chosen.

COOLANT IGNITION TIMING MODIFIER CALIBRATION

Base ignition timing modification dependent upon engine coolant temperature and engine

load to ensure efficient operation during warm-up and to minimize the possibility of

engine damage if over-heating occurs. Table size is 12 engine coolant temperature

calibration sites by 6 engine load calibration sites and the correction range is +/-

31.75 degrees.

ALTITUDE IGNITION TIMING MODIFIER CALIBRATION

Base ignition timing modification, dependent upon barometric pressure and engine load to

ensure efficient operation at high altitude. Table size is 7 engine load calibration

sites by 2 barometric pressure calibration sites and the correction range is +/- 31.75

degrees.

FUEL INJECTION DELIVERY TIMING

Calibration of the actual positioning of the fuel injection pulse within the engine

cycle, dependent upon engine speed and engine load. Calibration may be selected at up to

20 engine speed sites and 5 engine load sites with a resolution of 2.8 crankshaft

degrees.

INDIVIDUAL CYLINDER FUEL DELIVERY TRIMMING

Individual calibration trim tables for each injection group (i.e.:- cylinder) to correct

for injector calibration differences or individual cylinder efficiency differences due

to non-ideal manifolding. These tables share common calibrations sites with the

injection timing calibration data (20 X 5) and allow +/- 61% adjustment range in 0.4%

increments.

MANIFOLD ABSOLUTE PRESSURE SENSOR FAILURE LIMP HONE CALIBRATION

Calibration table that allows the throttle position sensor to act as a back-up in the

event of a pressure sensor failure, thus ensuring almost normal engine operation. This

is used for limp home in applications where pressure is the primary engine load input.

This table can have up to 8 engine speed calibration sites and 6 throttle position

calibration sites. Calibration range is 20 to 420 KPa in 0.1 KPa increments.

THROTTLE POSITION SENSOR FAILURE LIMP HOME CALIBRATION

Calibration table that provides a limp-home function if the throttle position sensor is

faulty. This table uses the same engine speed calibration sites as the manifold pressure

failure table limp-home table. Calibration range is 0 to 100% in 0.1 % increments.

TRANSIENT ENGINE OPERATION CALIBRATION -

Calibrations to optimise the operation of the engine during- acceleration and

deceleration. These calibrations all have common engine speed calibration sites (up to 8

max).

i. IGNITION ADVANCE ATTACK RATE. Sets the maximum rate at which the ignition timing

is allowed to advance. Can be used to improve driveability and/or reduce exhaust

emissions. Calibration range 6 to 1590 deg/sec.

ii. IGNITION ADVANCE RETARD RATE.

Set the maximum rate at which the ignition timing is allowed to

retard. Can be used in conjunction with i. above to improve driveability and/or

reduce exhaust emissions. Calibration range.

6 to 1590 deg/sec.

iii. CLOSED THROTTLE ACCELERATION MULTIPLIER.

Sets the amount of additional fuel delivered for increasing throttle

openings starting from a closed throttle condition. Controls the

delivery of fuel for acceleration from small throttle openings

iv. OPEN THROTTLE ACCELERATION MULTIPLIER.

Sets the amount of additional fuel delivered for increasing throttle

openings starting from a part throttle condition. Controls the

delivery of fuel for acceleration from large throttle openings.

V. PART THROTTLE ACCELERATION LIMIT.

Sets the throttle position above which the closed throttle acceleration

multiplier no longer has an effect on acceleration fuel delivery.

This calibration is dependent upon the relative size of the

throttle butterflies to the engine capacity. Calibration range is

0 to 100% of throttle opening.

vi. ACCELERATION ENRICHMENT DECAY TIME.

Sets the duration of the acceleration enrichment. Calibration range

is 0.08 to 2 SEC.

vii. ACCELERATION ENRICHMENT RECOVERY TIME./ DECELERATION ENLEANMENT DECAY TIME. Sets

the time taken for the acceleration enrichment to recover in readiness for the

next acceleration enrichment. Also controls the duration of enleanment when a

throttle opening reduction occurs. Calibration range is 0.08 to 2 SEC.

viii. DECELERATION ENLEANMENT MULTIPLIER. Sets the amount of fuel delivery reduction

immediately following any throttle opening reduction.

CHARGE TEMPERATURE ESTIMATION CALIBRATION

Calibration that allows the estimation of the heat transferred to the incoming charge by

the hot manifold and intake port, so that an actual charge temperature may be estimated

for the calculation of correct fuel delivery. This table can have up to 16 engine speed

calibration sites and 10 engine "load" calibration sites. Calibration represents %

contribution that coolant temperature has in determining the charge temperature, its

range is 0 to 100% in 0.5% increments. This calibration is particularly useful for 2

stroke engines where the charge temperature is almost totally determined by crankcase

temperature:

WARM-UP ENRICHMENT CALIBRATION

This calibration table allows engine coolant temperature and engine

"load" dependent control of additional fuel delivery. It controls

additional fuel delivery after the initial post start enrichment

period has finished, and its main function is to ensure stable

engine operation during engine warm-up. It can also be used to

enrich the air/fuel mixture at high engine loads if an engine

overheated condition is detected in order to minimize the risk.

of engine damage. Calibration may be selected at up to 13 engine

coolant temperature sites and 10 engine "load" sites and

the adjustment range is 1.00 to 1.99 times the base fuel delivery.

POST START ENRICHMENT CALIBRATION

Additional fuel delivery immediately after start-up is controlled by this table, this

additional delivery decays away with time to the warm-up enrichment value from the table

above. Calibration range is 1.00 to 3.99 times the base fuel delivery. This calibration

function is only engine coolant temperature dependent and it uses the same engine

coolant temperature 'calibration sites as chosen for the warm-up enrichment calibration

table above.

POST START ENRICHMENT TIMEOUT CALIBRATION

The decay time for the additional fuel delivery immediately after start-up is controlled

by this table. Calibration range is 0 to 20 SEC. This calibration function is only

engine coolant temperature dependent and it uses the same engine coolant temperature

calibration sites as chosen for the warm up enrichment calibration table above.

WARM-UP ACCELERATION ENRICHMENT MULTIPLIER

Calibration multiplier for additional engine coolant temperature dependent acceleration

enrichment. Calibration range is 1.0 to 8.0 times the "warm" engine value. This

calibration uses the same engine coolant temperature calibration sites as chosen for the

warm-up enrichment calibration table above.

WARM-UP FAST IDLE RPM CALIBRATION

Calibration for idle speed increase required of automatic idle speed control function

during low temperature engine operation. This calibration table may also be used to

increase the idle speed if engine overheating occurs so that engine driven cooling fan

efficiency is improved helping to elevate the condition. Calibration range is 0 to 1020

RPM. This calibration uses the same engine coolant temperature calibration sites as

chosen for the warm-up enrichment calibration table above.

POST START FAST IDLE RPM CALIBRATION

Calibration for idle speed increase immediately following start-up. Decays away with

time to warm-up fast idle RPM calibration. Calibration range is O to 1020 RPM. This

calibration uses the same engine coolant temperature calibration sites as chosen for the

warm up enrichment calibration table above.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: