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[YesAuto Engine Technology] In a few days, the biennial Beijing Auto Show will kick off again. Auto manufacturers have announced that they will unveil important products at the auto show, and blockbuster news has emerged one after another. At this moment, Qoros suddenly announced its cooperation with the Swedish supercar brand Koenigsegg for the powertrain part, which caught everyone's attention for a while. At present, the official information is only a sentence of cooperation. Then, based on the various data collected by ourselves, we can speculate why the cooperation content is probably the subversive cancellation of the camshaft for the engine.

■ Say goodbye to the camshaft?

-Irreplaceable role?

As we all know, the camshaft is a vital part of the engine's valve train, which can drive the valve to open and close on time and on demand. That is, in the intake stroke, it helps the cylinder to “inhale” fresh air or mixed gas, and in the exhaust stroke, the exhaust gas after combustion is discharged in time.

-The impossible becomes possible

Koenigsegg's quietly announced technology is called Camshaft-less, which is a technology without camshafts. So, how does the engine valve timing system work without the camshaft? What benefits will this bring to the engine?

The whole system includes two pneumatic lines and one oil pressure line. When it is necessary to adjust the valve timing and lift, gas flows in from the pneumatic pipeline. At the same time, the oil pressure control system ensures the adjustment of the pressure through the relevant pipeline. The adjusted gas is returned from another pipeline, and the oil is returned by the corresponding pipeline.

-Both strengths and weaknesses

The new gas distribution system can enter the “role” as soon as the engine starts, and this will enable the engine to obtain the best gas supply under various operating conditions. In other words, engine power performance and fuel economy will no longer be irreconcilable contradictory products. In addition, the introduction of the electronic control system makes it easier to realize the cylinder closing function. According to the test, the fuel consumption can be reduced by an average of 10%.

Earlier we saw the various benefits brought about by the cancellation of the camshaft, but this does not mean that this technology has no drawbacks or risks. First of all, this new technology uses a hydraulic and pneumatic multi-loop control system, which means These mechanisms need to be arranged on the cylinder head. In addition, the electronic control system needs to withstand the challenges of a variety of harsh conditions such as high temperature, high pressure, and high vibration frequency. In addition, although the R&D team has carried out a 50,000-kilometer test on the vehicle, the test mileage is still relatively short for the technology that will be mass-produced and used in the future, and the number of samples is relatively small. Can not fully reflect the problems encountered in the real car environment.

Behind this avant-garde technology, its hidden stories and inextricable connections are also worth exploring. You may have been wondering why the Nordic people, who have always been known for their calmness, have such crazy ideas. In addition, Koenigsegg’s How does this avant-garde technology relate to Qoros? Below, let us speculate and restore the story behind this technology through the currently not abundant information.

■ The story behind the technology

-Legacy of Scandinavia

Although Koenigsegg took this technology that may change the history of car engines, but it has a behind-the-scenes hero. This is the pride of Swedish cars, the bankrupt Saab. This technology and the story behind it dates back to 2000, 16 years ago.

That was shortly after the global celebration entered the millennium, a company called Cargine Engineering had begun to optimize the gas distribution part of gasoline engines. If you open the introduction of this company, you will find in a hidden corner that its investors are Saab and Koenigsegg. Beginning in 2003, it began to determine the research direction as how to control the valve timing system without the camshaft structure.

-A reborn new born

While the research and development was gradually advancing, Saab, one of the investors, fell into a financial crisis and did not improve afterwards. In 2009, Koenigsegg acquired Cargine Engineering. After expanding its technology R&D team, it was renamed FreeValve. This is the R&D team behind this technology we see today.

We mentioned earlier that this technology originated from an experimental project in 2000. After more than ten years of research, Koenigsegg has invested a lot of money in the project. After the technology has passed the test, it can be installed in the stage of mass production vehicles. , They need a partner who can help their large-scale applications and recover costs.


Among FreeValve's official website partners, we found the world-renowned internal combustion engine R&D and testing company AVL List. Judging from the cooperation data, AVL has also contributed indelibly to the development of this technology.

AVL Lister is currently the world's largest private company engaged in internal combustion engine design and development, powertrain research and analysis, and related test system and equipment development and manufacturing. Almost all engine manufacturers in the world are on its customer list.

-Demand from across the ocean

In this story, the story of Chery, the parent company of another protagonist, Qoros, is also unfolding at the same time. Time also goes back more than 10 years, at this time Chery has not yet completely emerged from the shadow of the 1.6-liter Tritec engine. At that time, Chery's new compact car needed a new engine that was more powerful and reliable. More importantly, this engine must be independently developed. During this research and development process, Chery and AVL came together.

Until today, AVL has played a vital role in Chery's powertrain development process. Coupled with the relationship between AVL and Koenigsegg, we cannot but guess that AVL is the bridge between Chery and Koenigsegg.

-Natural cooperation

In 2011, Chery announced that a 50:50 joint venture with the Israel Group has officially released its first car brand. This brand is today's Qoros. However, the current Qoros product line has only two types of engines for the powertrain to choose from. This emerging brand has an urgent need for powertrain research and development.

Although both Qoros and Koenigsegg have not announced specific cooperation matters, through the above interpretation I believe you can also feel that one has a strong desire for a new powertrain, and the other is eager to obtain its own technology. Determination to produce. Coupled with AVL Liszt as a link, such a cooperative relationship is not difficult to understand.

Full text summary:

Three years ago, when we analyzed the Qoros four-wheel drive system, we mentioned that its technology originated from Saab. Today, 3 years later, when Qoros announced the cooperation with Koenigsegg again, we saw that it also has Saab. Shadow. The seemingly calm Swedes “secretly” had crazy ideas about the camshaft, a component that controls the working state of the engine's valve train, and has been preparing for mass production for more than 10 years. Improve engine power performance and reduce fuel consumption. With the birth of new technologies, it will no longer be a fish and a bear's paw that cannot be achieved at the same time. However, all of this is ultimately our conjecture. What is the situation of the cooperation between Qoros and Koenigsegg? The answer Will be announced at the Beijing Auto Show.