FORM■2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL
Specification
(See section 10 and rule 13) NON AUTOMOTIVE ENGINES
KIRLOSKAR OIL ENGINES LTD.,
an Indian Company
of Laxmanrao Kirloskar Road, Khadki, Pune 411 003,
Maharashtra, India
THE FOLLOWING SPECIFICATION DESCRIBES THE INVENTION.

This invention relates to non automotive engines.
In particular, this invention relates to mounting arrangements for non automotive engines.
More particularly, this invention relates to anti-vibration mounting arrangements for non automotive engines.
Various types of machines and the use of engines to drive these machines have become the mainstay of processing, manufacturing and fabrication industry. Machines that are widely being used in such industries are generators, gensets, lathes, drilling machines, milling machines, shaping machines and the like. The use of non-automotive industrial-type diesel engines in equipment systems and machinery in which the engine drives a hydraulic pump, air compressor or generator is very common. Diesel engines are also used in locomotives, vehicles, ships, power generators, and industrial equipment as primary main power sources. The popularity of the non automotive type diesel engines has increased over the years because of their fuel efficiency and low maintenance.
The diesel engine is a type of internal combustion engine more specifically, it is a compression ignition engine, in which the fuel is ignited by being suddenly exposed to a high temperature and pressure of a compressed gas, rather than by a separate source of ignition, such as a spark plug, as is the case in of the gasoline engine. Air is drawn into the cylinder of a diesel
engine and compressed by the rising piston at a compression ratio higher
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than that for a spark-ignition engine. A higher compression ratio is helpful in raising efficiency.
Vibrations occurring in the engines are one of the important reason for reduction in efficiency and breakdown of the engine. Vibrations in an engine may occur inherently or as a result of damage of different component parts. Another important aspect is that due to greater compression force required and the increased weight of the stronger components, starting a diesel engine is a harder task. More torque is required to push the engine through compression. Either an electrical starter or an air start system is used to start the engine turning. On large engines, pre-lubrication and slow turning of an engine, as well as heating, are required to minimize the possibility of damaging the engine during initial start-up and running. Vibrations occuring during start and stop of the engine are generally greater than during normal running and may also cause damage to the engine.
An object of this invention is to reduce the transfer of vibrations from the engine to the base on which the engine is mounted
Another object of this invention is to provide an improved anti-vibration mounting arrangement for the engine.
In accordance with one preferred embodiment such an anti-vibration mounting arrangement this invention envisages the use of special anti vibration mountings, which reduce the transfer of vibrations from the body of the engine to the base on which the engine is mounted. The anti-vibration
mounting arrangement comprises:
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(i) cradle means, which are adapted to accommodate an engine;
(ii) anti-vibration mounting means, over which the cradle means are
mounted; (iii) plurality of support element means, over which the anti-vibration
mounting means are fitted; and (iv) rigid base plate means which is adapted to accommodate the
support element means.
In accordance with another preferred embodiment of such an anti-vibration mounting arrangement this invention envisages a method of arrangement of the components of the anti-vibration mountings comprising the following steps:
(i) calculating the combined centre of gravity of the engine and the
alternator; (ii) placing the rigid base plate means on a floor; (iii) mounting the support element means over the base plate means; (iv) positioning the anti-vibration mounting means on the support element means in a manner such that the anti-vibration mounting means is spaced as far apart as possible from the centre of gravity calculated in step (i); (v) mounting the cradle means over the anti-vibration mounting
means; and (vi) mounting the engine within the cradle means.
Figure 1 illustrates a partial side view of the generating set showing the anti-vibration mounting arrangement in its operative configuration as viewed
from the gear end, according to prior art;
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Figure 2 illustrates a side view of the generating set of figure 1 the anti-vibration mounting arrangement in its operative configuration being viewed from the fuel pump side, according to prior art;
Figure 3 illustrates the anti-vibration mounting arrangement in its operative configuration as viewed from the gear end, according to this invention; and Figure 4 illustrates a side view of a generating set with the anti-vibration mounting arrangement in its operative configuration according to this invention.
Figure 1 illustrates the anti-vibration mounting arrangement in its operative configuration as viewed from the gear end and Figure 2 illustrates the anti-vibration mounting arrangement in its operative configuration as viewed from the fuel pump side, according to prior art. The mounting arrangement in accordance with the prior art includes the use of a metal frame (10) over which anti-vibration mountings (12) are fitted. The engine is then fitted on the anti-vibration mounting (12). The anti-vibration mounting (12) is reinforced with cross members (14) for dampening the vibrations. However in use this type of anti-vibration mounting arrangement reduced the vibrations from 600 microns to a value of 300 microns.
Figure 3 illustrates the anti-vibration mounting arrangement in its operative configuration as viewed from the gear end and Figure 4 illustrates the anti-
vibration mounting arrangement in its operative configuration according to this invention. A rigid base plate means (16) is placed, over which support element means (18) are fitted. Anti-vibration mounting means (20) are then fitted over the support element means (18). Cradle means (22) with
reinforcement ribs are fitted over the anti-vibration mounting. The engine is
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then fitted over the cradle means (22). The arrangement of the component parts is done in a manner such that the anti-vibration mounting means (20) are placed away from the centre of gravity of the engine. This arrangement ensures that the equilibrium is maintained. In use this arrangement of the anti-vibration mountings limit the vibrations to a value less than 20microns.
While considerable emphasis has been placed herein on the various components of the preferred embodiment and the interrelationships between the component parts of the preferred embodiment, it will be appreciated that many alterations can be made and that many modifications can be made in the preferred embodiment without departing from the principles of the invention. These and other changes in the preferred embodiment as well as other embodiments of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.
Dated this 9th day of March, 2007.

Mokdi Dewan
ofR. K. Dewan&Co
Applicants' Patent Attorneys
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