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||A new generation of two stroke engine
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Since the creation of the snowmobile in 1960 by JArmand
Bombardier in Quebec, Canada, this product
knew a quick popularity throughout the country and North
America. With an annual average snowmobile sale in
Canada of more than 57000 units on the last twelve
years, this winter sport as an important economic impact.
In Canada only, this sport generates $6 billion annually.
This situation is proportionally the same in the province
of Quebec. Each year, about 800000 persons practice
snowmobiling throughout Quebec and its also an
appreciate activity by tourists by this way the total direct
economic repercussions are estimated at 752 M$ .
However, all this circulation involve significant
consequences. Since december 1st 2004, the court of
Quebec ordered a judgement prohibiting the
snowmobiles on approximately thirty-eight kilometers in
the Mont-Tremblant area on the linear parc of “Le Petit
Train du Nord”. This legislation came from complaints of
owners, living a few hundred meters away from the path,
that consider unacceptable the noise emitted by the
snowmobileseverytime of the day . This judgement
had big consequences on the snowmobile tourism
industry and several jobs were in danger.
To resolve this situation and to assure the survival of the
region winter tourism, new technological solutions must
be used. Those solutions must provide the enthusiasts
with good performances while being environmentally
By talking with snowmobilers,
we found which characteristics we were going to focus
on when working on our sled. All the people are
convinced that the power, the torque and the
acceleration of the snowmobile are the most important
things. The competition needs us to develop a balance
between environment and consumer’s demands. How
could we make this? First of all, we have to analyze what
technologies are available that offer power, that are light
weight and have good noise and pollutant emissions.
•Two stroke engine
•Four stroke engine
•Two stroke semi-direct injection engine
•Two stroke direct injection engine
•Diesel compression technology
The 2-stroke engine is the best engine based on power
to weight ratio. It has a good acceleration and powerful
torque. However, the biggest problem with the two-stroke
engine is certainly its level of pollution. The snowmobile
emissions test clearly shows that the 2-stroke engine
pollutes more than the 4-stroke.
This study presents a different type of engine called 2-
stroke DI. DI meaning direct injection. It suggests that
this new technology will reduce emission from 25 to 35
percent inferior than those of a 4-stroke engine. This
process is now available on marine engines and
watercrafts and they surpassed the 4-stroke standards.
The 4-stroke has a lot of advantages too. It is reliable
and as low pollutant emissions which make it a good
choice. After examining all the information for every
engine, we decided to base our modifications on the
consumer’s and environmentalist’s demands.