The project of a three-wheeled vehicle with a gas engine, created by Karl Benz in 1885, became the starting point of a new era in the history of mechanical transport. It was this machine, called Patent-Motorwagen, was the first device where the internal combustion engine was the only source of thrust, and not an auxiliary element to the steam plant. Unlike its predecessors, which ran on steam, this unit used liquid fuel and operated on a four-stroke cycle, which required the development of completely new mixture supply and ignition systems.
Development led to the creation single cylinder engine volume of 954 cubic centimeters, which produced power of 0.75 horsepower at 400 rpm. The frame design was made of steel pipes, and the drive was carried out to the rear axle via a chain drive, which was a revolutionary solution for that time. The lack of a full-fledged transmission was compensated for by a belt drive, which made it possible to switch between idling and driving, as well as a simple brake mechanism acting on the drive shaft.
First tests showed that evaporative type carburetor needs improvement as the mixture was often found to be too lean or rich to operate consistently. Karl Benz was forced to introduce a wick carburetor, where gasoline evaporated from the surface of a porous material, which ensured more uniform mixture formation. This modification allowed the car to reach speeds of up to 16 kilometers per hour, which was then considered an extremely high indicator for street conditions.
Technical features of Patent-Motorwagen
The design of the first car was based on principles that seem archaic today, but were then the pinnacle of engineering. Ignition system worked from a galvanic battery and an induction coil, creating a spark in a spark plug screwed into the cylinder head. This solution required constant maintenance and replacement of batteries, but provided the necessary reliability of ignition of the mixture.
The most important element was a large horizontal flywheel located under the engine, which served to smooth out uneven rotation of the crankshaft. Due to its mass, it acted as an energy accumulator, allowing the piston to overcome the dead points of the compression stroke. The engine was cooled by water circulating in a jacket around the cylinder, although a full-fledged radiator with a fan did not yet exist.
⚠️ Attention: Early versions of the engine did not have a forced cooling system, which often led to overheating and jamming of the piston during prolonged operation at high speeds.
The car was controlled by a tiller, reminiscent of a ship's steering wheel, which turned the front wheel. There was no accelerator pedal in the modern sense; speed was adjusted by changing the throttle position manually or using a lever. Braking was carried out by pressing a wooden block against the flywheel, which required significant physical effort from the driver.
How the ignition system worked
Early models used magneto-electric ignition, where current was generated by rotating a magnet inside a coil. This eliminated the need for an external battery, but required fine-tuning of the spark plug gap and the condition of the breaker contacts, as the spark was weak and unstable.
The role of Bertha Benz in the history of the automobile industry
The historic journey made by Bertha Benz on August 5, 1888 from Mannheim to Pforzheim was the world's first long-distance automobile journey. She took Patent-Motorwagen without her husband's knowledge, in order to prove the practicality of the invention and attract public attention to the new type of transport. Along the way, she had to face many technical problems, the solution of which laid the foundations for modern automotive diagnostics.
One of the main problems was a blockage in the fuel line, which was a thin tube clogged with dirt. Bertha cleared it out with a hatpin, marking the first time a clog had been cleared in automotive history. Later, faced with a fuel shortage, she was forced to buy refined gasoline from a pharmacy, since at that time it was sold as a clothes cleaner.
During the trip it also became clear that wooden brake pads wear out quickly and become ineffective. Bertha turned to a local shoemaker, who covered the pads with leather, which significantly improved braking and became the prototype of modern friction linings. This case demonstrated the need for improved materials for friction units.
⚠️ Attention: During the run, Bertha had to stop often to clean the valves from carbon deposits and add water to the cooling system, since the infrastructure for car maintenance was completely absent.
Evolution of the internal combustion engine after Benz
After receiving the patent and the first successful tests, the rapid development of internal combustion engine technologies began. Engineers from different countries began to experiment with the number of cylinders, mixture formation methods and ignition systems. Two-cylinder boxer engines appeared, which provided better balance and less vibration compared to single-cylinder counterparts.
An important step was the introduction of spray carburetors, which replaced evaporative systems. This allowed the engine to operate at any speed and under any load, providing stable power. At the same time, a water cooling system with honeycomb radiators was developed, which made it possible to boost the engines without the risk of overheating.
By the beginning of the 20th century, engine power had increased significantly, and their reliability made it possible to begin mass production of cars. Construction crank mechanism has become a standard, and the materials for making parts have become more durable and wear-resistant. The advent of the electric starter freed drivers from having to manually start the engine, making cars accessible to the general public.
The main difference between the first car and its predecessors was complete autonomy: it did not need external sources of steam or electricity to move, using the energy of combustion of liquid fuel inside the cylinder.
Comparison of characteristics of the first cars
To understand the scale of technological progress, it is useful to compare the characteristics Patent-Motorwagen with later models appearing at the end of the 19th century. The difference in power, weight and speed was colossal, which reflects the intensity of the development of engineering in that period.
| Model | Year of manufacture | Power (hp) | Engine capacity (cm³) | Max. speed (km/h) |
|---|---|---|---|---|
| Benz Patent-Motorwagen | 1886 | 0.75 | 954 | 16 |
| Peugeot Type 3 | 1891 | 4.0 | 1260 | 25 |
| Mercedes Simplex | 1902 | 35.0 | 5320 | 90 |
| Ford Model T | 1908 | 20.0 | 2800 | 72 |
As can be seen from the table, in just 15 years the engine power has increased tens of times, and the speed has increased by 5-6 times. This became possible thanks to the improvement of the quality of metallurgy, the introduction of new principles of gas dynamics and the improvement of lubrication systems. While the first Benz car could only carry one or two people, the new models could accommodate entire families.
Problems of operation and maintenance of early internal combustion engines
Owning a first car required the owner to have deep technical knowledge and constant readiness for repairs. The engines were extremely sensitive to the quality of the fuel, which often contained impurities and water. Lubrication system was primitive: oil was dripped with a wick or supplied manually before each trip, which required constant level monitoring.
A common problem was coking of piston rings and valves due to incomplete combustion of fuel and the use of low quality mineral oils. Owners had to regularly disassemble the engine to mechanically clean parts from carbon deposits. The plain bearings also required frequent adjustment of clearances and replacement of antifriction bearings.
☑️ Checklist for preparing your first car for a trip
The tires on the first cars were solid rubber, which provided low comfort and high noise levels. There were no punctures as such, but worn-out tires had to be replaced entirely, which was expensive and time-consuming. There was no suspension as a class, the role of shock absorbers was performed only by soft seats and the elasticity of the tires.
⚠️ Attention: When operating early engines, there was a risk of ignition of gasoline vapors, since the electrical insulation was unreliable, and open spark sources were in close proximity to the fuel lines.
Legacy and influence on the modern auto industry
Karl Benz's invention laid the foundation for the entire modern automobile industry. The principles laid down in Patent-Motorwagen, such as the four-stroke cycle, spark ignition and liquid cooling, remain relevant today, albeit in much improved form. Modern electronic engine control systems are a direct development of those first mechanical governors.
Mass production of automobiles, which began at the beginning of the 20th century, changed the face of cities and the way of life of people around the world. Road infrastructure, a network of gas stations and service centers - all this grew out of the need to service cars with internal combustion engines. Without the success of Benz's first experiment, technology development might have taken a different path, perhaps towards electric vehicles or steam powered units.
To preserve historic ICE cars from the early 20th century, it is critical to use modern fuel additives that prevent gasoline oxidation and tar formation in the carburetor, since old tanks and lines are not designed for ethanol-containing fuel.
FAQ: Frequently asked questions
Why did the first car have three wheels and not four?
The three-wheel layout was chosen to simplify the steering design. Turning one front wheel required a less complex mechanism than turning two front wheels with a common axle. It also provided better stability on the poor roads of the time and made turning easier.
What fuel was used in the first car?
Karl Benz initially used refined naphtha (a light petroleum product), which was sold in pharmacies at the time as a cleaning agent. Gasoline in the modern sense was not yet produced on an industrial scale for engines.
Has the original Patent-Motorwagen survived to this day?
The original 1885 car has not survived in its original form, as it was disassembled and used to create new models. However, museums in Germany (notably the Deutsches Museum in Munich and the Mercedes-Benz Museum in Stuttgart) display restored copies and later versions from 1886-1888.
Did Benz patent his car right away?
Yes, on January 29, 1886, Karl Benz received patent No. 37435 for the “Self-ignition gas engine.” This document is considered the car's birth certificate, although the car itself was ready and tested several months earlier.