IS 7451-6: Reciprocating Internal Combustion Engines, Part VI: Hand Operated Control Devices - Standard Direction of Motion

2007·1 MB·English

by  Bureau of Indian Standards

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IS 7451-6 (2007): Reciprocating Internal Combustion
Engines, Part VI: Hand Operated Control Devices - Standard
Direction of Motion [TED 2: Automotive Primemovers]
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IS 7451 (Part 6) :2007
ISO 2261:1994

Indian Standard
RECIPROCATING INTERNAL COMBUSTION
ENGINES
PART 6 HAND-OPERATED CONTROL DEVICES — STANDARD DIRECTION OF
MOTION
( First Revision)
ICS 27.020.00

@ BIS 2007
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
August 2007 Price Group 3
Automotive Primemovers, Transmissions, Steering Systems and Internal Combustion Engines
Sectional Committee, TED 2
NATIONAL FOREWORD
This Indian Standard (Part 6) (First Revision) which is identical with ISO 2261 :1994 ‘Reciprocating
internal combustion engines — Hand-operated control devices — Standard direction of motion’ issued
by the International Organization for Standardization (!S0) was adopted by the Bureau of Indian
Standards on the recommendation of the Automotive Primemovers, Transmissions arid Steering
Systems and Internal Combustion Engines Sectional Committee and approval of the Transport
Engineering Division Council.
This standard was first published in 1974. The first revision has been undertaken due to revision of
the base standard as indicated above.
The Sectional Committee decided to align the Indian Standard with the corresponding International
Standard wherever feasible and wherever the domestic considerations were not so intense so as to
have standards different from the ISO Standards. This decision was taken with a view to upgrade the
quality of the products in line with the International Standards.
The text of ISO Standard has been approved as suitable for publication as an Indian Standard without
deviations. Certain conventions are, however, not identical to those used in Indian Standards.
Attention is particularly drawn to the following:
a) Wherever the words ‘International Standard’ appear referring to this standard, they should
be read as ‘Indian Standard’.
b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current
practice is to use a point (.) as the decimal marker.
For the purpose of deciding whether a particular requirement of this standard is complied with, the
finalwalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in
accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of
significant places retained in the rounded off value should be the same as that of the specified value
in this standard.
IS 7451 (Part 6):2007
ISO 2261:1994
Indian Standard
RECIPROCATING INTERNAL COMBUSTION
ENGINES
PART 6 HAND-OPERATED CONTROL DEVICES — STANDARD DIRECTION OF
MOTION
First Revision)
(
1 Scope c) actuating the operating device from the traveling
position to the centre position results in a speed
This International Standard specifies the direction of decrease to a full stop.
motion of hand-operated devices for speed regulation
and reversing of reciprocating internal combustion
3 Designation of operations
(RIC) engines, having particular regard to RIC engines
for marine and rail propulsion — irrespective of
Operating directions and effects caused by actuation
whether the operator’s position is near the engine or
of the control devices are coordinated in tables 1 and
remote from it.
L.
Valves for the control of liquids and gases are ex-
cluded.
4 Preferredposition of operator on
installationson which the directionof
2 Effectsof actuatingthe operating
movement of the vehicle isvisible to the
device
operator
2.1 Where separate operating devices for reversing
Operator positions should preferably be arranged in

and speed regulation are installed:
such a manner that the operator is looking towards

the front of the vehicle.
a) actuating the operating device for reversing re-
sults in a forward movement, or a backward If the operator’s position is arranged parallel to the
movement; direction of travel of a vehicle (the operator looking
sideways), the operator’s position should be arranged
b) actuating the operating device for speed results in
in such a manner that the operating directions of the
a speed increase or decrease.
control devices correspond to the definitions given in
this International Standard.
2.2 Where combined operating devices for revers-
ing and speed are installed:
5 Designation
a) actuating the operating device from the centre
position in one direction results in a forward To indicate the effect resulting from the motion of an
movement with increasing speed; operating device, standardized symbols –– instead of
words — shall be placed next to the operating device
b) actuating the operating device from the centre (as shown in tables 3 and 4). These symbols are in
position in the opposite direction results in a accordance with ISO 7000 and IEC 417, as appro-
backward movement with increasing speed; priate.

1
IS 7451 (Part 6) :2007
ISO 2261:1994
Table 1 — Operating directionsand effeotswith separateoperating devicesfor reversing andfor speed
re-=gulation
Motion of Type of Directionofmotion ofoperating device!}
Designation of
operation operating operating Increasaofspaedormovement Decreaseofspaed ormovement
davice device ahead backward
away from the towards the
Al
operator operator
/ /
linear orapproxi-
hand lever
mately hnear
B, upwards downwards
1 T
c1 tothe right to the left
handwheel or
D, turning clockwise
crank handle n Cl i%ll%e
1) The above diagrams are used to describe the direction of motion and shall not bt?used asgraphic symbols. The graphic symbols to
be used are shown intable3.
Table 2 — Operating directionsand effectswith acombined operating devicefor both reversingand
s—nre—e—d_regulation
Motion of Type of Directionofmotion ofoperating devicellfrom central(stop)position
Designation of operating oparating with incraaseofspeadz)
oparation
device device Movament ahead Movement backward
/’
A2 away from the b towards the
.’J0 operator operator
.. 2

linear orapproxi- hand lever 10
B2 mately linear upwards T downwards
J-
10
C2 ---0+ tothe right *o-- to the left
D2 turning handwheel or /’”0 clockwise ~-., counter-
crank handle \ clockwise
A P,
1) The above diagrams are used to describe the direction of mot!on and shall not be used as graphic symbols. The graphic symbols to
be used are shown intable3,
2) Decrease ofspeed wevery case WIIIbe attained byactuation ofthe operat!ng device inthe direction towards the central (stop)position.
2
IS 7451 (Part 6) :2007
ISO 2261:1994
Table 3 — Svmbols for spaed regulation and vehicledirection
Symbolsfor
Designationof lSO/lEC
epaad-progressive Explanation
operation RegistrationNo.
increaeeordecrease
A, Bor C Motion of the operating device towards the wide IEC 417-5004
end of the wedge results inan increase of speed.
Motion of the operating device towards the point
D of the wedge results ina decrease of speed. 1s07000-1364
Symbolsforvehicle
direction
forward movement With engines driving a vehicle — marine or
rail — directly (without a reversing gear) the di-
rection of rotation of the engine determines the
1s07000-0775
direction inwhich the vehicle moves.
Forward movement of the vehicle is indicated by
fi
a symbol representing the vehicle with an arrow
A, B, Cor D
backward movement pointing towards the front end (bow) of the ve-
hicle.
Backward movement of the vehicle is indicated ISO 7000-0776
by a symbol representing the vehicle with an ar-
row pointing towards the rear end (stern) of the
Q vehicle.

3
IS 7451 (Part 6) :2007
ISO 2261:1994
T.—ab-l.e—A ——I..ll.u—st-r..a—ti-o--n.s.—o-.f t-v,mri.c-a—l.o-p~e-r.a—ti.o.n_s.._

NOTE — The actual design may differ from the illustration shown above.
The operating devices may be combined at random according to the application.

4
IS 7451 (Part 6) :2007
ISO 2261:1994
Annex A
(informative)
Bibliography
[1]ISO 7000:1989, Graphical symbols for use on [2] IEC 417:1973, Graphical symbols for use on
equipment — /ndex and synopsis. equipment — Index, survey and compilation of
the single sheets.