Katerina Swanson
The first electronic fuel injection system was introduced in the 1950s, with the Bosch unit found in select 1955 Mercedes-Benz 300SLs. The technology was adopted from Mercedes' Formula One injection system, which debuted the year before. However, the first cars to offer electronic fuel injection on a mass-market production scale were built by Chrysler and its subsidiaries in 1958. Since the mid-1990s, it has been impossible to buy a new car without fuel injection in Europe, with all newly introduced engines having to be fuel-injected since 1992.
| Characteristics | Values |
|---|---|
| First electronic fuel-injection system | Bendix Electrojector, first installed on the Rambler prototype in 1957 |
| First electronic fuel-injection system on a mass-market production scale | Introduced by Chrysler and its subsidiaries in 1958 |
| First configuration to reach a mass-market scale | Bosch unit in select 1955 Mercedes-Benz 300SLs |
| First fuel injection system that was relatively successful and trouble-free | Rochester's Ramjet mechanical fuel injection system, first introduced on the 1957 Corvette |
| First electronic fuel injection system by Bosch | D-Jetronic, first introduced on the VW 1600 TL in 1967 |
| First major use of fuel injection | World War II aircraft |
| Decade when fuel injection started to appear in mainstream cars | 1970s |
| Decade when it became mandatory for all newly introduced engines in Europe to be fuel-injected | 1990s |
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What You'll Learn
- The first mass-market electronic fuel injection system was the Bosch unit in 1955 Mercedes-Benz 300SLs
- The first electronic fuel injection system, the Electrojector, was introduced in 1957
- By the 1970s, fuel injection was appearing in mainstream cars
- Since the mid-1990s, all new cars in Europe have had to be fuel-injected
- Electronic fuel injection systems replaced mechanically-operated fuel injection systems
The first mass-market electronic fuel injection system was the Bosch unit in 1955 Mercedes-Benz 300SLs
The technology behind the Bosch unit was adapted from Mercedes-Benz's Formula One injection system, which debuted just a year earlier. The German companies Bosch and Mercedes-Benz dominated the early era of fuel injection in cars. This early collaboration between Bosch and Mercedes-Benz laid the groundwork for further innovation in this field.
The Bosch unit offered several advantages over traditional carbureted engines. It provided a more precise and efficient way of delivering fuel to the engine, reducing mixture variations and improving overall engine performance. By electronically controlling the fuel injection, the system eliminated the need for manual adjustments and tinkering associated with carbureted engines.
However, the 1955 Mercedes-Benz 300SLs equipped with the Bosch unit experienced widespread issues with gasoline leaking into the engine oil. As a result, Mercedes-Benz switched to an alternate, manifold fuel injection design shortly after the debut of the 1955 300SL model. Despite this setback, the Bosch unit in the 1955 Mercedes-Benz 300SLs paved the way for the widespread adoption of electronic fuel injection systems in the automotive industry.
Over time, electronic fuel injection systems became the standard for new cars worldwide. By the 1970s, fuel injection was appearing in mainstream cars, and since the mid-1990s, it has been mandatory for all newly introduced engines in Europe to be fuel-injected. Today, virtually every car in the developed world relies on electronically controlled fuel injection, showcasing the lasting impact of the pioneering work done by Bosch and Mercedes-Benz in the 1950s.
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The first electronic fuel injection system, the Electrojector, was introduced in 1957
The history of the first electronic fuel injection system is a fascinating one. In 1957, the Bendix Electrojector was introduced, marking a significant milestone in the evolution of automotive technology. This innovative system laid the foundation for the fuel injection technology found in virtually all modern gasoline production cars today.
The story of the Electrojector began with Robert W. Sutton, an engineer at the Eclipse Aviation division of Bendix, a manufacturer of aircraft carburetors. Experiments commenced in 1953, and by 1955, vehicles with prototype EFI systems were already on the road. Unlike the digital circuitry of current EFI systems, the Bendix Electrojector utilised analogue circuitry, as microprocessors and IC chips had not yet been invented.
The Electrojector's control units, referred to as "modulators," relied on vacuum tubes, which took a considerable amount of time to warm up. Despite being the first of its kind, the Electrojector faced challenges with cold-weather starting, ultimately leading to its demise. However, it was a pivotal step forward in the journey towards electronic fuel injection.
In the late 1950s, several manufacturers introduced their manifold injection systems for petrol engines. Lucas Industries, for instance, had been working on a fuel injection system since 1941, and by 1956, it was implemented in Jaguar racing cars. At the 1957 24 Hours of Le Mans, Jaguar D-Type entries equipped with the Lucas fuel injection system claimed the top four positions, showcasing the potential of fuel injection technology.
The Rochester Ramjet, another significant development in 1957, was an automotive fuel injection system offered as a high-performance option on the Corvette and GM passenger cars. Unlike the fully electronic fuel injection systems that would emerge later, the Ramjet was purely mechanical, relying on vacuum and pressure signals to measure airflow and meter fuel. Despite facing some challenges, the Ramjet represented a step forward in the pursuit of more efficient and reliable fuel injection technology.
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By the 1970s, fuel injection was appearing in mainstream cars
Fuel injection technology has come a long way since its early days in industrial engines and aircraft during World War II. The first fuel injection systems for petrol engines, adapted from diesel technology, appeared in the early 1950s, with the Goliath GP700 in 1952 being the first. In 1954, the Mercedes-Benz Formula 1 team fitted fuel injection to their "Silver Arrow" racecar, derived from the system used in the Messerschmitt Bf 109 fighter plane. The German companies Bosch and Mercedes-Benz were key players in the early development of fuel injection for cars, with Bosch's technology debuting in select 1955 Mercedes-Benz 300SLs.
By the 1970s, fuel injection was making its way into mainstream cars. For instance, the British company Lucas had developed a fuel injection system that was fitted to various Jaguar, Aston Martin, Triumph, and Maserati models until the mid-1970s. Another widely adopted system during this time was the first generation of Bosch Jetronic, used by Porsche, VW, Audi, Volvo, BMW, and other European manufacturers.
In the United States, Chevrolet introduced its "Small Block" V8 engine with Rochester fuel injectors, while the American Motors Corporation (AMC) and Chrysler began offering electronic fuel injection in their cars in 1957 and 1958, respectively. These early electronic fuel injection systems had their challenges, and it would take a few more decades before they became the standard in new cars.
Since the mid-1990s, it has become mandatory for all newly introduced engines in Europe to be fuel-injected, and today, virtually every car in the developed world relies on electronically controlled fuel injection. This technology has brought significant improvements in efficiency and ease of use and reduced the need for adjustments compared to carbureted engines.
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Since the mid-1990s, all new cars in Europe have had to be fuel-injected
The history of fuel injection in cars goes back to the 1930s and 1940s, when mass-produced diesel engines for passenger cars, such as the Mercedes-Benz OM 138, first became available. These were the first fuel-injected engines for passenger car use. The first fuel injection for petrol engines, a reworked diesel system, appeared on the Goliath GP700 in 1952. In 1954, the Mercedes-Benz Formula 1 team fitted its "Silver Arrow" W196 racecar with Bosch direct injection, derived from the system used in the Messerschmitt Bf 109 fighter plane from World War II.
In the 1950s, several companies began developing fuel injection systems, including Bosch, Lucas, Hilborn, SPICA, and Kugelfischer. The first electronic fuel injection system, the Bendix Electrojector, was introduced by the American Motors Corporation in 1957, though it suffered from reliability issues. In 1958, Chrysler became the first company to offer electronic fuel injection on a mass-market production scale with its Electrojector system.
By the 1970s, fuel injection was appearing in mainstream cars. The first electronic fuel injection system by Bosch, called D-Jetronic, was introduced on the VW 1600 TL in 1967 and soon appeared on many other cars from various brands. Bosch dominated the early era of fuel injection in cars, and their K-Jetronic and L-Jetronic systems were used until the mid-1990s.
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Electronic fuel injection systems replaced mechanically-operated fuel injection systems
The first electronic fuel-injection system was the Bendix Electrojector, introduced in 1957. However, it was not the first fuel injection system, as several mechanically-operated fuel injection systems were already in use at the time. Mechanical fuel injection systems, which first appeared in the early 1900s, rely on a complicated fuel pump that provides pulses of high-pressure fuel to the injector feeding each cylinder. The pressure of the fuel causes the injector to open automatically, spraying fuel into the combustion chamber or intake. Mechanical fuel injection systems were widely used during World War II in aircraft engines and were later introduced in race cars and then road cars.
The first mass-market fuel injection system was the Bosch unit, which was fitted to select 1955 Mercedes-Benz 300SLs. The technology was initially developed for use in Mercedes-Benz's Formula One injection system. However, due to issues with gasoline leaking into the engine oil, Mercedes switched to an alternate manifold fuel injection design shortly after its debut. The first relatively successful and trouble-free fuel injection system was Rochester's Ramjet mechanical fuel injection system, introduced on the 1957 Corvette.
In the 1950s, electronic fuel injection systems began to appear, and by the 1970s, they were being fitted to mainstream cars. The first electronic fuel injection system by Bosch, called the D-Jetronic, was introduced on the VW 1600 TL in 1967. This system used engine speed and intake manifold air density to calculate the amount of fuel to be injected. In 1974, Bosch introduced the K-Jetronic system, which used a continuous flow of fuel from the injectors, and the L-Jetronic system, which used an air flow meter to calculate the amount of fuel required. The L-Jetronic system was widely adopted in European cars during the 1970s and 1980s.
The introduction of stricter emissions regulations in the 1980s and 1990s led to the phasing out of mechanical injection systems in most petrol engines. Electronic fuel injection systems offered more accurate fuel delivery and better fuel efficiency, which helped car manufacturers comply with the new regulations. By the early 1990s, electronic fuel injection systems had largely replaced carburettors in most new petrol-engined cars sold in developed countries. Today, virtually every car in the developed world uses electronically controlled fuel injection, which offers superior performance and does not require the adjustments and tinkering that carburettors did.
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Frequently asked questions
The first electronic fuel pumps were introduced in the 1950s.
The first electronic fuel pump was introduced by Bosch.
The first electronic fuel pump was introduced in the 1955 Mercedes-Benz 300SL.
Electronic fuel pumps offered significant improvements in efficiency and user-friendliness over mechanical systems. They also eliminated the need for adjustments and tinkering, which was common in carburetor systems.
Yes, since the mid-1990s, it has been mandatory for all newly introduced engines in Europe to be fuel-injected. Today, virtually every car in the developed world uses electronically controlled fuel injection.
