BS 5672:1991

Committees responsible
National foreword
Specification
1. Scope
2. Definitions of locations on an engine
3. Direction of rotation
4. Position of the observer
5. Designation of direction of rotation
6. Designation of the cylinders
7. Designation of the valves
8. Definition of right-hand and left-hand in-line
     engines
Figures
1. Locations on an engine
2. Direction of rotation
3. Position of the observer
4. Position of observer for in-line engine
5. Position of observer for V-engines
6. Examples of the designation of cylinders of in-line
     engines
7. Typical multibank engine
8. Examples of the designation of cylinders of engines
     with more than one bank
9. Vertical crankshaft X-engine
10. Inlet valves near to observer, exhaust valves away
     from observer
11. Inlet valves at right, exhaust valves at left of
     observer
12. Examples of the application of the valve designation
     method
13. In-line engines with vertical cylinders
14. In-line engines with cylinders other than vertical

Defines directions and locations on an engine related to the defined position of an observer.

This International Standard specifies methods of designating the direction of rotation and the cylinders of reciprocating internal combustion engines and of designating a specific valve in a cylinder head when the cylinder head is mounted on the engine or dismantled.

It defines right-hand and left-hand in-line reciprocating internal combustion engines and locations on a reciprocating internal combustion engine so that the position of equipment on the engine can be described.

It applies to reciprocating internal combustion engines for land, rail-traction and marine use, excluding engines used to propel agricultural tractors, road vehicles and aircraft. It may by applied to engines used to propel road-construction and earth-moving machines, industrial trucks and for other applications where no suitable International Standard for these engines exists.