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By
Jack Nerad
Driving Today |
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The conventional wisdom suggests that early automobiles were simply carriages
equipped with crude engines instead of a horse. But when it comes to the first
car, that conventional wisdom isn't just unwise, it's also false. Karl Benz was
such a visionary that even his first motor vehicle was designed from the ground
up as an automobile, not a retrofitted carriage.
Ironically, the man, whose invention ultimately would threaten the viability of
railroad travel, was born the son of a German railway man. Though his father
died when Benz was just 2 years old, he eventually followed him into the
railway industry. It was Benz's mother, however, who had the most influence on
the budding engineer. She scrimped and saved to send him to polytechnic, where
he studied mathematics and steam engine design, and she encouraged him when he
told her that he would one day build a vehicle that would not need rails.
After leaving college, Benz landed a position in a locomotive factory, but his
schooling was somewhat wasted there because most of his waking hours were spent
banging on iron with a hammer. Soon Benz tired of the drudgery and opened his
own machine shop, but within a few years the business failed and its assets
were auctioned to pay creditors. Though a seeming tragedy at the time, the
failure of the business turned out to be a blessing, because it gave new
impetus to Benz's dream of creating a motor vehicle unfettered by rails.
Of course a compact engine was the key ingredient in designing such a vehicle,
so Benz kept a close eye on the engineering developments of the time,
developments that included Nikolaus Otto's four-stroke gas engine.
Unfortunately for Benz, Otto patented his invention, so Benz concentrated his
early efforts on two-stroke engines. He finally developed his first operating
prototype on New Year's Eve 1879.
With a successful engine on display in his workshop, Benz was able to gather
some financial backers to market the coal gas-powered units, but his mind was
still on his dream of a motor car. When he announced his intention to proceed
on that idea, several of the venture capitalists got cold feet and attempted to
talk him out of the fool notion.
Benz persisted, however, and he proceeded with his plan. When Otto's patent
lapsed, Benz began experimenting with four-stroke powerplants and eventually
put together a tiny, one-cylinder engine that featured three innovations that
are still in use today -- an electric battery, spark plug and electric coil
ignition.
Of course, these three innovations didn't come together at once. Benz's first
attempt at electric ignition used a generator in conjunction with the coil, but
the generators of the early 1880s were not up to the task, so the inventor
shifted to an electric storage battery, again using the coil to build up the
voltage to the desired level to produce a sizable spark. The sparkplug itself
consisted of two lengths of insulated platinum wire intruding into the
combustion chamber.
Though the ignition system on the Benz engine was in many ways very modern, the
fuel induction system was anything but. The engine didn't use fuel injection or
anything resembling a true carburetor. Instead fuel drained into a can filled
with fabric fibers, and then evaporation carried the fumes into the cylinder.
Steering was also rudimentary. Benz wanted to build a four-wheel vehicle, but
the engineer who had solved many of the problems of the internal combustion
engine was unable to work out a satisfactory two-wheel steering system. To
remedy that difficulty, he fitted the vehicle with a single front wheel, which
could be turned by a remotely mounted tiller.
Despite this primitive set-up, however, the first Benz Motor Wagen was a far
cry from a wagon with a motor on it. The chassis of the vehicle was fashioned
of steel tubes, just like a Ferrari, and the large rear wheels were attached to
it with a genuine suspension system -- full elliptical springs. Rubber tires
were fitted, but they were non-pneumatic, transmitting the poor quality of the
contemporary road surfaces directly to the driver and passenger's backsides.
Crude as some elements of the vehicle were, however, Benz did make an effort to
engineer key aspects of the vehicle including weight distribution, engine
cooling, rear-end differential and the semblance of a gearbox. To allow the car
to idle, Benz worked out an arrangement of two pulleys: one rigidly connected
to a countershaft, while the other turned freely on the shaft. When Benz wanted
to stop the vehicle, he would apply the handbrake, which closed a band on the
countershaft and pushed a rod that moved the driving belt from the fixed
pulley, allowing the engine to idle without driving the wheels.
Engine power was transmitted to the wheels via two bicycle-style chains running
to sprockets on the rear wheels. The final distinguishing feature of the Benz
car was its huge flywheel, which Benz mounted horizontally for better weight
balance.
Benz first attempt to drive his creation in 1885 resulted in the first recorded
automobile accident. In an enclosed area outside his Mannheim, Germany,
workshop, he started his car successfully and got it under way, but,
unaccustomed to the steering, he missed the open gateway and crashed into a
wall. The car was damaged, but Benz was undaunted by the mishap, and soon he
was motoring around Mannheim at 4 or 5 mph, often to the consternation of his
neighbors.
By 1888 the Benz Motor Wagen was in production for sale, but buyers weren't
exactly standing in line for the new creation. That is, until Benz's wife and
two sons drove the vehicle from Mannheim to Pforzheim, a distance of some 70
miles. The car was hardly trouble-free on the journey, but it made the trip in
less than a full day and, because the Benz family outing was widely reported in
the press, it proved to be a marketing coup.
Buyers finally came knocking, and, after reorganizing the company in 1890, the
Benz motor works was on its way as a commercial enterprise. Soon Benz was
offering a four-wheel car he dubbed the Viktoria, which in turn was followed by
the Velo, the first attempt at volume production.
The Benz concern faced increasing competition as the '90s ended, and in 1903
Benz briefly left his own firm in a huff, but he already had made his mark, the
realization of his childhood dream: the first motor car.
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