Is Hongqi's 3.0T from the previous generation of Audi's 3.0T supercharged engine?

Z0z Hongqi’s 3.0T engine has once again attracted widespread attention after the launch of this year’s H9. As one of the few mass-produced 3.0T engines among independent brands, the most discussed online is whether this engine is completely independently developed by FAW or The EA837 3.0T supercharged engine from the previous generation of Audi ? Today, we will compare the technical solutions from the information disclosed by Hongqi to see what are the differences:

1. Similar supercharged design and performance indicators

1, supercharged V6 design

Hongqi 3.0T adopts domestic products Too many supercharged V6 designs are structurally similar to Audi's previous generation EA837 3.0T engine (the new Audi EA839 3.0T has abandoned supercharged and changed to a turbocharged design). The supercharger is located in the middle of the V-type cylinder and is driven by a belt. This is also the conventional design of the supercharged V6.

The following picture shows the mechanical supercharging structure of the Hongqi 3.0T engine:

The following picture shows the supercharging structure of the Audi EA837 3.0T engine:

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z0, the rated power of the red flag is close to 3. The Audi EA837 supercharged 3.0T engine has a rated power of 250kW and a peak torque of 500N·m. From the performance point of view, the Hongqi 3.0T and Audi’s old supercharged 3.0T engines are very close, with a rated power difference of only 2kW.

2. Some significant differences in design

Although the two engines are very similar in terms of the scheme and performance of the supercharged V6, there are still some significant differences between the two designs in other major structures:

1. The timing drive system scheme

Hongqi 3.0T engine adopts a more advanced double VVT design with a middle-mounted oil pressure control valve, and the timing chain is arranged at the front end of the engine. You can see in the figure below that there is no chain system at the rear of the engine.

instead uses a more conventional front-end chain drive and double VVT.

The Audi EA837 uses the traditional side-mounted oil pressure control valve VVT ​​design, and the timing chain is arranged at the rear end of the engine, as shown in the figure below.

2, fuel injection system

The fuel injection systems of the two engines are also quite different; the

Hongqi 3.0T engine uses the in-cylinder direct injection system with 200bar injection pressure, which is not the most advanced direct injection system at present ( The latest direct injection system has an injection pressure of 350bar). The main reason should be that the engine has been developed for a long time.

Audi EA837 3.0T supercharged engine uses a dual injection system with direct injection and port injection, which is similar to the design of Audi EA888 3rd generation. The dual injection system can theoretically combine two injection systems. The advantages of reducing emissions and fuel consumption are also helpful for improving the valve and combustion chamber carbon deposit .

At the same time, we can see in the above figure that the position of the high-pressure fuel pump driven by the camshaft is completely different due to the huge difference in the timing chain position. The Hongqi 3.0T high-pressure fuel pump is at the rear end of the engine, The high-pressure fuel pump of the Audi EA837 is at the front end of the engine. Z3z

summarizes:

Hongqi 3.0T supercharged engine has some significant differences in structure from the old Audi 3.0T supercharged engine design, but it is undoubtedly a reference in the overall scheme of supercharged V6 Audi 3.0T.