Road vehicles -- Gearshift patterns -- Manual transmissions with power-assisted gearchange and automatic transmissions with manual-gearshift mode

ISO/TS 12104:2003 establishes the shift patterns for manual transmissions with power-assisted gear changes and automatic transmissions with manual-gearshift mode on road vehicles. It also specifies the location of the gear-select and manual-gearshift modes in relation to one another. It is applicable to road vehicles as defined in ISO 3833, excepting motorcycles. It is not applicable to manual transmissions having gearshift patterns without a +/- manual-gearshift mode, nor to displays or tell-tales.

Véhicules routiers -- Disposition de la commande de changement de vitesse -- Boîtes de vitesses à commande manuelle assistée et boîtes de vitesse automatiques à commande manuelle

General Information

Status
Withdrawn
Publication Date
09-Dec-2003
Withdrawal Date
09-Dec-2003
Technical Committee
Drafting Committee
Current Stage
6060 - International Standard published
Start Date
30-Oct-2003
Completion Date
10-Dec-2003
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ISO/TS 12104:2003 - Road vehicles -- Gearshift patterns -- Manual transmissions with power-assisted gearchange and automatic transmissions with manual-gearshift mode
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TECHNICAL ISO/TS
SPECIFICATION 12104
First edition
2003-12-15
Road vehicles — Gearshift patterns —
Manual transmissions with power-
assisted gearchange and automatic
transmissions with manual-gearshift
mode
Véhicules routiers — Disposition de la commande de changement de
vitesse — Boîtes de vitesses à commande manuelle assistée et boîtes
de vitesse automatiques à commande manuelle
Reference number
ISO/TS 12104:2003(E)
ISO 2003
---------------------- Page: 1 ----------------------
ISO/TS 12104:2003(E)
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ii © ISO 2003 — All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 12104:2003(E)
Contents Page

Foreword............................................................................................................................................................ iv

Introduction ........................................................................................................................................................ v

1 Scope...................................................................................................................................................... 1

2 Normative references........................................................................................................................... 1

3 Terms and definitions........................................................................................................................... 1

4 Gear modes........................................................................................................................................... 2

4.1 Gear-select mode.................................................................................................................................. 2

4.2 Manual-gearshift mode......................................................................................................................... 3

5 Application of shift direction principles for manual-gearshift mode .............................................. 4

5.1 General................................................................................................................................................... 4

5.2 Fore/Aft................................................................................................................................................... 4

5.3 Left/right (transverse)........................................................................................................................... 6

5.4 Up/down (vertical)................................................................................................................................. 8

Annex A (informative) Indication of low gear(s) in MSA shift pattern........................................................... 9

Bibliography ..................................................................................................................................................... 10

© ISO 2003 — All rights reserved iii
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ISO/TS 12104:2003(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

In other circumstances, particularly when there is an urgent market requirement for such documents, a

technical committee may decide to publish other types of normative document:

— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in

an ISO working group and is accepted for publication if it is approved by more than 50 % of the members

of the parent committee casting a vote;

— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical

committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting

a vote.

An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a

further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is

confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an

International Standard or be withdrawn.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO/TS 12104 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 13,

Ergonomics applicable to road vehicles.
iv © ISO 2003 — All rights reserved
---------------------- Page: 4 ----------------------
ISO/TS 12104:2003(E)
Introduction

Electronic controls for vehicle transmissions can make the operation of changing gears for manual and

automatic transmissions much more alike. Gear changes in manual transmissions can be made in a similar

manner to those in automatics, without the need for a clutch pedal. Conversely, automatic transmissions can

incorporate a means for manually shifting between individual gears. When the operation of changing gears is

similar for both types of transmissions, drivers expect a similar shift pattern for selecting or changing gears.

This document is published as a Technical Specification because there is controversy about the most

appropriate shift direction for fore/aft motion of a floor- or instrument panel-mounted gear lever. Currently,

some vehicles use the forward direction of the gear lever for upshifts, while other vehicles use the rearward

direction for upshift. National delegations have not achieved consensus on which shift direction to standardize

for this particular situation. Consensus has been achieved for all other shift directions shown in Table 1.

TC 22/SC 13 believes that a standard for direction of motion is desirable. Drivers of road vehicles should not

have to contend with two opposite shift directions of motion for the floor-mounted lever gearshift controls. Data

provided by Japan indicated that there was no stereotype for the upshift direction of motion when gear levers

were mounted on the floor and operated in the fore/aft direction. Either direction could have been chosen as

the standard. After considering all data and arguments for each direction of motion, SC 13 decided that pull

rearward for upshift was the best alternative. By publishing this document as a Technical Specification, SC 13

is giving manufacturers time to provide data to support a different direction of motion, or change their products

in order to comply with this Technical Specification.
© ISO 2003 — All rights reserved v
---------------------- Page: 5 ----------------------
TECHNICAL SPECIFICATION ISO/TS 12104:2003(E)
Road vehicles — Gearshift patterns — Manual transmissions
with power-assisted gearchange and automatic transmissions
with manual-gearshift mode
1 Scope

This Technical Specification establishes the shift patterns for manual transmissions with power-assisted gear

changes and automatic transmissions with manual-gearshift mode on road vehicles. It also specifies the

location of the gear-select and manual-gearshift modes in relation to one another. It is applicable to road

vehicles as defined in ISO 3833, excepting motorcycles. It is not applicable to manual transmissions having

gearshift patterns without a +/− manual-gearshift mode, nor to displays or tell-tales.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
ISO 3833, Road vehicles —Types — Terms and definitions
ISO 2575, Road vehicles — Symbols for controls, indicators and tell-tales
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
shift pattern

driver interface indicating the transmission settings, and the arrangement (sequence) of those settings, that

are selectable by the driver using the shift control device
3.2
power-assisted gear changes

〈manual transmission〉 gear changes accomplished by an add-on power controller, eliminating the need for

driver operation of a clutch pedal
3.3
manual-gearshift mode

gearshift mode, unique in respect of the normal shift pattern, that permits manual upshift (+) or downshift (−)

through forward or backward gears using a shift-con
...

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