February 23rd 2007.
It's taken over 100 years to develop
the internal combustion engine to its present
state of refinement.
Rotary engines and two stroke engines are
essentially going to fall by the wayside.
The former because its inauspicious fuel
economy and the latter because of its tendency
to pollute unnecessarily.
But the good old piston engine could easily
go on for another 100 years in one form or another.
The fuel it uses may, eventually,
change but the principles of its operation
will survive. The uninformed media are bombarding
us all with the theory that humanity
is going to hell in a hand basket. Electric
cars and hybrids are being touted as the only
way to stop the polar bears from drowning
and to turn the world into one large, glorious
rain forest.
So why will the old Otto cycles' "suck,
compress, ignite and blow" system survive
for so long?
Because many other options have been tried
and have failed. Rover produced turbine
cars in the 50s and one turbine even ran at
Indianapolis. They are smooth, comparatively
quiet and will burn almost anything but
their emissions levels are very hard to control.
Rotary "Wankel" engines reached the point
at one time where Mazdas' whole line of vehicles
including trucks were rotary powered.
Fuel cell technology reaches back to the
early 60s, Volvo produced the very first hybrid
over 15 years ago and I have personally
witnessed stationary diesel engines running
on pulverised coal dust. My professor of mechanical
engineering at University went
to his grave bemoaning the fact that we
had not developed the steam engine sufficiently
and he always claimed that steam was
a vastly superior form of power production.
Against all of these challenges, the internal
combustion (IC) engine has reached such an
advanced stage of development that it
will be very difficult to replace at a reasonable
cost. Most of this development in recent times
is due to the availability of cheap
microprocessors (you know, the ones that
illuminate your check engine light from time
to time).
Unfortunately, most of this electronic control
is being used to increase horsepower, while maintaining
old style fuel economy standards.
For the life of me I cannot understand why
a Chevrolet Impala, needs 303 horsepower to
propel a family of four to visit granddad and
grandma on a Sunday. Or Costco on a Saturday
for that matter.
You can turn this technology on its
head and produce a 33% increase in fuel economy
and improved emissions, just by tuning these
engines for that purpose. Performance will
suffer, but Porsches and Ferraris are special and
only populate a small percentage of the
market. So why does anyone need a 244 horse power minivan, when the same
truck could be tuned to produce
a steady 40 mpg?
Of course the good old IC engine can give
you both superior acceleration and much more fuel
economy, if only the Americans would
see the error of their ways and start buying
diesels. Imagine NASCAR, diesel powered and
running with half as many refuelling pit stops.
In the 60s a good F1 engine could produce
just over 300 horsepower, now a a 3.5 litre
Acura engine can match that performance
with all the emissions controls and full
driveability.
IC engines are becoming so efficient that
one day we may have to find alternative ways of
heating a car, because waste heat has
almost all been used up in propulsion.
That problem already exists with small diesels,
because of their efficiency.
Combine these levels of efficiency with
the supremely compact energy storage represented
by gasoline and diesel and all the
alternatives you are being pounded with
on the seven o'clock news are a long, long way
off.
So stick to mainstream, proven technology.
Don't get pulled onto the rocks by the siren
call of alternate fuels and and power sources
and the IC engine will continue to serve
you well, long after I'm out of here.