Benz Patent-Motorwagen

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The Karl Benz Patent-Motorwagen (or motorcaur), built in 1885, is widely regarded as the first automobile, that is, a vehicle designed to be propelled bi a motor.

The vehicle wis awarded the German patent, number 37435, which Benz applied for on Januar 29, 1886. Following offeecial procedures, the date o the application became the patent date for the invention ance the patent wis granted, which occurred in November o that year.

Benz offeecially unveiled his invention to the public on Julie 3, 1886 on the Ringstrasse (Ringstraße) in Mannheim, Germany.

Specifications[eedit | eedit soorce]

Efter developing a successful petrol-pouered twa-stroke piston engine in 1873, Benz focused on developing a motorized vehicle while maintaining a career as a designer an manufacturer o stationary engines an their associated parts.

The Benz Patent-Motorwagen wis a three-wheeled automobile with a rear-mounted engine. The vehicle contained mony new inventions. It wis constructed o steel tubing with woodwork panels. The steel-spoked wheels an solid rubber tires wur Benz's awn design. Steerin wis bi way o a toothed rack that pivoted the unsprung front wheel. Fully elliptic springs wur uised at the back alang with a live axle an chain drive on baith sides. A simple belt system served as a single-speed transmission, varying torque between an open disc an drive disc.

Workin replica o the 1885 Benz Motorwagen in Frankfurt, 2007

The first Motorwagen uised the Benz 954 cc single-cylinder four-stroke engine. This new engine produced ⅔ hp (½ kW) at 250 rpm in the Patent-Motorwagen, although later tests bi the University o Mannheim showed it to be capable o .9 hp (0.7 kW) at 400 rpm. It wis an extremely licht engine for the time, weighin aboot 100 kg (220 lb). Although its open crankcase an drip oiling system woud be alien to a modern mechanic, its uise o a pushrod-operated poppet valve for exhaust woud be quite familiar. A lairge horizontal flywheel stabilized the single-cylinder engine's pouer ootput. An evaporative carburettor wis controlled bi a sleeve valve to regulate pouer an engine speed.

Benz later built more models o the Motorwagen, model number 2 boasting 1.5 hp (1.1 kW), an model number 3 with 2 hp (1.5 kW), allowing the vehicle to reach a maximum speed o approximately 10 miles per oor (16 km/h). The chassis wis improved in 1887 with the introduction o widden-spoke wheels, a fuel tank, an a manual leather shae brake on the rear wheels.