caja de cambios at2512c (i-shift). software.pdf

8/20/2019 Caja de cambios AT2512C (I-shift). Software.pdf

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I-shift - Software

Student booklet


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I-shift - Software - INDEX - 2006-10-18 - 15:58

- INDEX -

I-shift - Software

This material describes the different software

options available to the I-shift gearbox and

how they can be combined in different ways.

The hardware is described in a separate

training kit.

I-shift software

Standard functions

ishift_sw_std_pshift.swf

Standard functions - Basic shift

strategy

Standard functions - Basic gear shift

adjustments

Standard functions - Gearbox oil

temperature monitor

Standard functions – Basic PTO

Functions

Standard functions –

Economy/Performance ModesSoftware packages - General

information

Software packages - Identification

Package functions

Package functions - Eco Roll

Package functions - Smart Cruise

Control

Package functions – Launch Control

Package functions – Enhanced Shift

Strategy

Package functions – Heavy Duty

GMC Control

Optional functions

Optional Functions – Gear

selections in auto 1

Optional Functions – Gear

selections in auto 2

Optional functions - Enhanced PTO

Functions

Functions in software packages

Contents

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I-shift - Software - ishift_sw_intro.swf - 2006-10-18 - 15:56

I-shift software

The functionality of the I-shift gearbox depends on the installed software functions.

There are three types of software functions:

- Standard functions

- Package functions

- Optional functions

Standard functions are always available.

Package functions are included in the different software packages. Every software package

includes a number of different software functions.

Optional functions can be added to the different packages to allow for specialized functionality.

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I-shift - Software - ishift_sw_std_list.swf - 2006-10-18 - 15:56

Standard functions

The following functions are the standard functions, they are always included with the I-shift

"C"-generation.

- Performance shift

- Basic shift strategy

- Basic gear shift adjustments

- Oil temperature

- Basic PTO

- E/P modes

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I-shift - Software - ishift_sw_std_pshift.swf - 2006-10-18 - 15:56

Standard functions - Performance Shift

The gearchanges are optimized regardless of the external conditions (for example road

inclination (gradient), oil temperature and gear ratio.

This is done through use of the engine’s compression brake (EPG/VEB), the clutch and the

countershaft brake.

The result is increased comfort and minimized shift times.

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I-shift - Software - ishift_sw_std_basicshift.swf - 2006-10-18 - 15:56

Standard functions - Basic shift strategy

A start gear from 1:st to 6:th gear will be automatically selected. The actual selection is done

depending on the vehicle weight (only with ECS) and road inclination (gradient).

There is also a trailer connector detection function in the LCM which adjusts the starting gear

when connecting and disconnecting a trailer.

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I-shift - Software - ishift_sw_std_basicadj.swf - 2006-10-18 - 15:56

Standard functions - Basic gear shift adjustments

When engine braking while driving in automatic mode it is possible to adjust the automatically

selected driving gear using the shift buttons on the shift lever.

Arrows in the display indicate available up/down gears.

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I-shift - Software - ishift_sw_std_oiltemp.swf - 2006-10-18 - 15:57

Standard functions - Gearbox oil temperature monitor

This function has the following features:

- the gearbox oil temperature will be shown in the dashboard display

- a gearbox oil temperature warning system will inform the driver when the gearbox oil

temperature is too high

Current warning levels

Yellow warning light:

Gearbox oil temperature >100° C for more than 300 minutes

Gearbox oil temperature >120° C for more than 30 minutes

Red warning light:

Gearbox oil temperature >140° C for more than 1 minute

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I-shift - Software - ishift_sw_std_basictpo.swf - 2006-10-18 - 15:57

Standard functions – Basic PTO Functions

It is possible to define which splitter gear that is selected when transmission PTO is used. Using

high or low splitter gear when running the PTO will result in different PTO speeds.

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I-shift - Software - ishift_sw_std_epmodes.swf - 2006-10-18 - 15:57

Standard functions – Economy/Performance Modes

This function adds the possibility to select between Economy and Performance modes. The

modes are selected with the E/P-button on the gear selector.

The mode currently active is shown in the display.

Economy

The strategy here is be to keep the engine revs inside the green field of the rev-counter to get

as good fuel economy as possible.

Performance

Here the engine revs are allowed to go above the green field so that the engines maximum

power can be used.

The available rpm-range is still wide enough to allow the gearbox to skip gears when possible.

Performance mode is automatically switched off after a couple of minutes if the driver does notuse the high engine speeds.

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I-shift - Software - ishift_sw_pack_general.swf - 2006-10-18 - 15:57

Software packages - General information

The different software packages each contain a selection of functions that suits different truck

uses.

Basic (TP-BAS)

Gives the transmission its basic functions and is supplied as standard with I-shift.

Distribution and Construction (TP-DICON)

Modifies the transmission’s operation for distribution and construction operation. Includes,

among other things, functions that aid maneuverability when starting from standstill and in

close-quarter maneuvering.

More text to this picture on next page.

_ Long Haul, Fuel & Economy (TP-FUEC)

Contains functions that minimize fuel consumption. This program package is particularly

suitable for long-haul operations.

Heavy Duty GCM Control (TP-HD)

Optimizes I-shift for heavy gross combination weights (>60 ton).

One program package can be replaced with another package using VCADS-Pro.

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I-shift - Software - ishift_sw_pack_disp.swf - 2006-10-18 - 15:57

Software packages - Identification

There are four different versions of software packages available.

Variant name - Software package name

TP-BAS - Basic

TP-DICON - Distribution and Construction

TP-FUEC - Long Haul, Fuel & Economy

TP-HD - Heavy Duty GCM Control

Package identification

When the gear lever is folded forward the display will show which software package that is

installed in a truck.

Display identification - Software packageB - Basic

DC - Distribution and Construction

FE - Long Haul, Fuel & Economy

HD - Heavy Duty GCM Control

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I-shift - Software - ishift_sw_pack_list.swf - 2006-10-18 - 15:57

Package functions

The following functions are functions that can be combined in different ways to form various

software packages.

- Eco roll

- Smart cruise control

- Launch control

- Enhanced shift strategy

- Heavy duty GCM control

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I-shift - Software - ishift_sw_pack_eco.swf - 2006-10-18 - 15:57

Package functions - Eco Roll

Eco Roll is a system designed to minimize the trucks rolling resistance when no engine power is

needed. Minimizing the rolling resistance will allow the truck to roll as far as possible before the

engine is needed again.

When Eco Roll is engaged the split gear is set to neutral position. This means that the engine is

disconnected from the gearbox. The engine is then allowed to idle during the time when Eco

Roll is engaged.

The function gives best results in slightly hilly conditions.


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Eco Roll is engaged when the following six conditions are met:

- gear selector is in “A” (Automatic) position

- auxiliary brake stalk is in “A” (Automatic) position- accelerator pedal is released

- brake pedal is not pressed

- downhill not steeper than 5%

- truck speed not too high (corresponding to 1800 rpm in top gear)

If any one, or more, of the six conditions are not met Eco Roll is disengaged.

Eco Roll can also be used when cruise control is activated.

If, for any reason, the engine stops running while the Eco Roll function is used the Eco Roll

function is automatically disengaged and the gearbox reconnected to the engine. This will

ensure that the servo assisted steering will be working.

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I-shift - Software - ishift_sw_pack_smartcc.swf - 2006-10-18 - 15:57

Package functions - Smart Cruise Control

Normal cruise control have a function that engages the auxiliary brakes (VEB and EPG) if the

set cruise control speed is exceeded by more than a set limit. This limit can be adjusted by the

driver.

Smart Cruise Control will enable a function that limits the auxiliary brakes even though the

vehicle speed is above the brake cruise set speed when the road conditions are such that the

vehicle still will decelerate with reduced auxiliary brake power. When possible the Eco Roll is

also activated.


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Smart Cruise Control is engaged when the following four conditions are met:

- cruise control is activated- gear selector is in “A” (Automatic) position

- auxiliary brake stalk is in “A” (Automatic) position

- accelerator pedal is released

- the offset speed for brake cruise is set to more than 5 km/h

- no engine PTO:s are activated

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I-shift - Software - ishift_sw_pack_launch.swf - 2006-10-18 - 15:57

Package functions – Launch Control*

This function adds the following features:

- will enable a function that allows clutch control at low vehicle speeds by use of the brake pedal

(see picture, the clutch is engaged by the accelerator pedal and disengaged by the brake pedal)

- will make it possible to run the vehicle at engine idle speed without slipping the clutch

- will control engine torque when driving in start gear in order to optimize gear shifting

performance and avoid running in high engine revs.


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The following functions requires that the EBS allows XBR (external brake request) from the

TECU.

- will automatically activate service brakes to stop the vehicle during start of vehicle when rolling

in wrong direction This feature requires Electronic Brake System (ABS-EBS) .- will automatically activate service brakes to stop the vehicle in order to change gear during

vehicle speed direction change. This feature requires Electronic Brake System (ABS-EBS).

- when Hill Start Aid is enabled a Smart Hill Start Aid function will automatically activate a

delayed brake release when the vehicle is in a uphill slope but not when the it is in a down hill

slope. This feature requires the medium or high Electronic Brake System package (EBS-MED or

EBS-HIG).

* Full functionality requires EBS and ECS.

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I-shift - Software - ishift_sw_pack_enhshift.swf - 2006-10-18 - 15:57

Package functions – Enhanced Shift Strategy*

This function adds the following features compared with the basic shift strategy:

- improvement of the engine brake performance by continuously selecting gears that runs the

engine at high revs. When a compact retarder is installed, the cooling performance is increased

and accordingly the retarder braking performance.

- when driver activates manual control on the air suspension control box, the lowest possible

gear will automatically be selected to get the best possible control of the vehicle when driving

slowly. This feature requires Electronically Controlled Suspension levelling (ECS).

The following function requires that the EBS allows XBR (external brake request) from the

TECU.

- the service brakes are applied momentarily during gear shifts when engine braking to

compensate for the interruption of engine brake torque. This maximizes the engine brakingperformance at the same time as giving an excellent comfort. This feature requires Electronic

Brake System (ABS-EBS) on the vehicle. This function will also be disabled if a trailer without

ABS is connected to the vehicle.

* Full functionality requires EBS-MED/EBS-HIG.

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I-shift - Software - ishift_sw_pack_hd.swf - 2006-10-18 - 15:58

Package functions – Heavy Duty GMC Control

This function adds features to better control high GMC weights (60-180 ton).

The function adapts the gear selections, clutch and shift operations for higher GMC.

The function is possible to use with the following variants:

- MD16 (ATO3112C)

- MD13, 480hp and 520hp (AT2512C and ATO2512C)

Note that there are also other restrictions that apply when this function is used, for example

topology restrictions.

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I-shift - Software - ishift_sw_opt_list.swf - 2006-10-18 - 15:58

Optional functions

The following optional functions can be combined with the software packages.

- Gear selections in auto

- Enhanced PTO functions

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I-shift - Software - ishift_sw_opt_gearaut1.swf - 2006-10-18 - 15:58

Optional Functions – Gear selections in auto ”1”

This function adds the following features when using “A” (Automatic) mode:

Starting gear

It is possible to manually adjust the automatically selected starting gear in automatic mode by

activating the shift button on the shift lever. Arrows in the display indicate available gears.

Driving gear

it is possible to manually adjust the automatically selected driving gear in automatic mode by

activating the shift button on the shift lever. Arrows in the display indicate available gears.

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I-shift - Software - ishift_sw_opt_gearaut2.swf - 1(2) - 2006-10-18 - 15:58

Optional Functions – Gear selections in auto ”2”

This function adds the following features when using “A” (Automatic) mode:

Kick-down

The kick-down function will change the gear-shifting strategy.

The picture shows the three different driving modes that the driver can select.

- Economy

The strategy here is be to keep the engine revs inside the green field of the rev-counter to get

as good fuel economy as possible.

- Performance

Here the engine revs are allowed to go above the green field so that the engines maximumpower can be used.

The available rpm-range is still wide enough to allow the gearbox to skip gears when possible.

Performance mode is automatically switched off after a couple of minutes if the driver does not

use the high engine speeds.

- Kick-down

During kick-down the engine revs are allowed to go above the green field so that the engines

maximum power can be used.

The gearbox will also try to keep the engine revs high by not using gear-skipping.

Variant name for “Gear Selections in Auto”:

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I-shift - Software - ishift_sw_opt_gearaut2.swf - 2(2) - 2006-10-18 - 15:58

- AMSO-AUT: option installed

- AMSO-BAS: option not installed

- UAMSO: option not available

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I-shift - Software - ishift_sw_opt_enhpto.swf - 1(2) - 2006-10-18 - 15:58

Optional functions - Enhanced PTO Functions

This option makes it possible to activate the Power Take Off features described below by setting

software parameters in VCADS-pro. All of the below functions require that a BBM module is

installed in the vehicle (variants ELCE-CK or SPEED-DU)

This option adds the following features:

Gear selection restricted by engine speed limits

It is possible to set software parameters that will limit the engine speed when engine or

transmission PTO:s are used. This feature will adapt the gear selection strategy to these speed

limitations.


_ Auto Neutral

The driveline will be disengaged on request from the BBM (Body Builder Module) regardless of

the gear lever position when the “Auto Neutral” function is active.

Reverse Inhibit

When the BBM requests “reverse inhibit”, the reverse gears is blocked by the transmission

system.

Split box engagement

It is possible to engage a split box for running high capacity PTO:s. The direct gear is engaged

when the Body Builder Module request that the split box is engaged.

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I-shift - Software - ishift_sw_opt_enhpto.swf - 2(2) - 2006-10-18 - 15:58

Variant name for “Enhanced Power Take Off Functions”:

- APF-ENH: option installed

- APF-BAS: option not installed

- UAPF: option not available

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I-shift - Software - ishift_sw_packages.swf - 2006-10-18 - 15:58

Functions in software packages

The picture shows the functions included in the different software packages.

Possible software combinations

The picture shows an overview over the possible combinations of ”standard”, ”package” and

”extra” functions.

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caja de cambios at2512c (i-shift). software.pdf

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