The modern automotive world is impossible to imagine without transmissionIt has become the standard of comfort and convenience for millions of drivers. Hard to believe, but a century ago, the shifting of gears required the driver of outstanding physical strength, excellent reaction and constant attention to the tachometer. It was the automation of this process that made driving accessible to the masses, eliminating the need to constantly work with the lever and clutch pedal.
Few people think that behind the smoothness of the course and ease of control hides more than a century of engineering searches, bold experiments and brilliant insights. The path from primitive semi-automatic systems to complex hydromechanical units was long and thorny. In this article we will discuss in detail, Who invented the automatic transmission?How the powertrain design has changed and why certain solutions have become dominant in the industry.
The history of the automatic transmission is not just a chronology of dates, but a story about the competition of engineers who sought to remove a person from the process of switching speeds. Many of the names behind the technology are now forgotten, but their contribution to the automotive industry remains fundamental. Let’s see how the idea was born and who embodied it in metal.
⚠️ Attention: Many people mistakenly attribute the invention of automatic transmission to Henry Ford, but his system is not. Model T It was only semi-automatic and required driver participation, albeit simplified.
Prerequisites for the emergence of automatic transmissions
In the early XX century, cars were the lot of enthusiasts and mechanics, as their management resembled a struggle with the mechanism. Manual transmission At that time, it had no synchronizers, which made the switching of speeds loud, complex and often led to breakdowns. The driver had to squeeze the clutch, wait for the speed to align and carefully turn on the gear, risking being left without teeth from being hit by a lever.
The first attempts to simplify this process began long before the appearance of a full-fledged machine. Engineers were looking for ways to transfer torque from the engine to the wheels without the rigid mechanical coupling that would require a constant break in the power flow. The main obstacle was the lack of effective ways of transmitting rotation without loss and jerks.
The key element without which the machine would not have been possible was hydrotransformer. The principle of its operation is based on the movement of fluid, which allows you to transfer the force smoothly and extinguish the engine jerks. However, before this element became mass-produced, engineers experimented with electric actuators and friction clutches.
- 🚗 Lack of comfort: Urban driving on the mechanics of the early XX century was exhausting due to frequent stops.
- ⚙️ Complexity of management: Double clutching and precise revving were required.
- 🔧 Low reliability: Frequent failures of gears and shafts due to drivers' mistakes.
⚠️ Attention: Early systems often combined mechanical and automatic elements, requiring the driver to manually select a range of speeds that was not a full-fledged automatic.
Herman Fettering and the first patent for the machine
If you look for a particular person who first patented a device that works on the principle of modern automatic transmission, this name is the name of the user. Herman Fettering. In 1904, this American engineer applied for a patent that described a device remarkably similar to modern hydromechanical transmissions. His invention was based on the use of planetary mechanism and hydraulic control.
Fettering's design included two pumps and a valve system that had to automatically switch gears depending on the speed of movement. This was a revolutionary step, as it involved the complete exclusion of the driver from the process of selecting the gear. However, the technologies of the beginning of the century did not allow to realize this idea with the necessary accuracy and reliability.
Despite the genius of the idea, motor-car At that time, it was not ready for the mass introduction of such complex systems. The materials could not withstand the loads, and the hydraulics were too primitive. However, Fettering’s patent became the foundation on which all developments in this field were built later.
Why didn't Fettering's idea blow the market up right away?
At the beginning of the XX century, the philosophy of simplicity and repairability dominated. The mechanical boxes were understandable to any blacksmith, whereas the Fettering hydraulic machine required a high production culture and skill to maintain, something that was not available in garage conditions of the 1900s.
The Age of Planetary Transmissions and the Ford Model T
Although a full-fledged automatic machine appeared later, an important stage in the history of automation passed through the Ford Model T. Henry Ford introduced a planetary gearbox into this model, which was controlled by two pedals. It wasn’t a machine in the modern sense, but it was a huge step forward compared to the mechanics of the competitors.
In the Ford system, the driver had to hold one pedal to turn on the first gear and release it to go to the highest. This simplified management, but still required action from the person. Planetary machineryThe slingshot used here has become a key element of future automatic transmissions, allowing gear ratios to be changed without breaking the power flow.
Many drivers considered the management of the Model T This is the basis for marketing future developers. Engineers realized that the market was hungry for simplification, and began actively searching for ways to make the switch completely independent of human will.
- 🛠️ Two pedal: Control was carried out by brake pedals and "low speed".
- 🔄 Planetary gearbox: Compact design that allows you to change the transmissions inside one housing.
- 📉 No synchronizers: Switching still required certain skills, albeit less.
Ford's system was robust for its time, but had limits on gearing and efficiency. However, it proved that simplified driving is the path to a mass-produced car.
General Motors and the birth of Hydra-Matic
The real breakthrough and the moment when gearbox It is a reality, we can say 1939. That's when the company was. General Motors introduced the transmission Hydra-MaticIt was developed by engineers Oliver Kelly and Earl Thompson. This device was the world's first serial fully automatic transmission, combining a hydrotransformer and planetary transmissions.
Hydra-Matic stamped Oldsmobile It was a four-stage unit. She used hydraulic pressure to control frictions that switched gears without the driver's intervention. It was not just a semi-automatic system, but a full-fledged machine that decided when to move to the next stage.
The success of the novelty was resounding. In the postwar years, when the US automotive market began to grow rapidly, the presence of automatic transmissions became the main bargaining chip for sales. Hydraulic control It allowed smoothing the engine jerks and made the ride smooth, which was immediately appreciated by buyers.
| Characteristics | Mechanics (1930s) | Hydra-Matic (1939) | Modern automatic transmission |
|---|---|---|---|
| Number of steps | 3-4 | 4 | 8-10 |
| Management | Handheld. | hydraulic | Electronically |
| Clutch. | Dry (disc) | Hydrotransformer | Hydrotransformer/Robot |
⚠️ Attention: Early versions Hydra-Matic They were prone to sudden switching ("kicks"), which was nicknamed "back kicks", but for that time it was an acceptable price for comfort.
Evolution: from hydraulics to electronics
After the appearance Hydra-Matic The development has gone the way of improving hydraulic systems. In 1948. General Motors presented Powerglideeh Chrysler let out Fluid Drive. However, the real leap was the introduction of electronic control systems in the late 20th century. If earlier the logic of switching was engaged in valves and oil pressure, now computers have done it.
Electronic governance It allowed to take into account dozens of parameters: the position of the throttle, the speed of rotation of the wheels, the temperature of the oil, the angle of inclination of the road and even the driving style. The transmission learned to “think” and adapt to the driver. There are modes "Sport", "Eco" and the ability to manually switch.
In parallel, other types of transmissions have developed. CVT (c) the variable variable ratio is proposed, and robotic boxes (DSG, Powershift) tried to combine the efficiency of mechanics with the comfort of the machine. Each of these technologies has its creators and a unique history of development.
- 💻 Computerization: Transition from purely hydraulic to electrohydraulic control.
- 🌍 Globalization: Automatic transmission technologies became standard first in the United States, then in Europe and Asia.
- 🚀 Speed: Modern boxes switch in milliseconds, which is faster than a human reaction.
When choosing a car with automatic transmission, pay attention to the type of transmission: the classic hydraulic transformer is more reliable in traffic jams, and the robot (DSG) is more economical on the road, but more difficult to maintain.
Comparison of Types of Automatic Transmissions
Today, the term “automatic” has become a household name, but it hides completely different technical solutions. Understanding the difference between the two is important not only for overall development but also for proper car maintenance. Classic automatic transmission with a hydrotransformer remains the most reliable, but has a loss of efficiency.
Variators (CVT)The sleek, popular with Japanese manufacturers, provide perfect smoothness, but not all drivers like their "monotonic" sound when accelerating. Robotic boxes Two-clutch offers sporty dynamics, but can be capricious in urban start-stop mode.
Engineers continue to search for a balance between fuel efficiency, switching speed and durability. The number of transmissions in modern machines already reaches 10, which allows the engine to work in optimal mode at almost any speed.
☑️ What to see when buying a used car with automatic transmission
The invention of the automatic transmission is the result of the collective work of engineers, but it was the Hydra-Matic of 1939 that became the starting point of the era of the true automatic.
The path from Fettering’s patent to modern 10-speed units took more than a century. During this time, the automatic transmission has gone from a curiosity for the rich to a standard without which it is impossible to imagine comfortable driving. And yet mechanical-box It still has its fans, the future is definitely for automated systems.
The future of ALMA
In the near future, classic automatic machines may give way to electric transmissions, where the role of gearshifting takes on the electric motor, which does not require a multi-stage box in the traditional sense.
Frequently Asked Questions (FAQ)
Who invented the first automatic transmission?
The first patent for a device similar to a modern machine was received by Hermann Fettering in 1904. The first fully automatic and fully automatic box was Hydra-Matic General Motors, released in 1939.
Why is the Ford Model T not considered the first machine?
Ford Model T He used planetary gear, but required the driver to manually control the pedals to switch modes. It was a semi-automatic system that did not relieve the driver of the need to control the speed switching.
When did the machines become mass-produced in Europe?
In Europe, automatic transmissions began to appear on the mass of middle-class cars much later than in the United States - only in the 1960s and 70s. For a long time they were considered the lot of premium models due to the high cost and fuel consumption.
Which gearbox is more reliable: a machine or a machine?
Traditionally. mechanical-box It is considered more resourceful and easy to repair. However, the modern classic With a hydraulic transformer, with timely oil change, 300,000-400,000 km walk without problems, often surviving the engine itself.