How does a three-rotor engine work, and what are its advantages?

The working principle of the three-rotor engine What is it like? What are its advantages? The three-rotor engine is also known as the Miller cycle engine. It uses the rotational motion of its three rotors to control compression and exhaust, which differs significantly from the linear motion of traditional piston reciprocating engines.

　　The motion characteristics of the three-rotor engine are as follows: The centers of the three rotors rotate around the central output shaft, while the rotors themselves spin around their own individual centers. As the three rotors turn, the internal gear rings at their centers mesh with the gear attached to the central output shaft. This gear is fixed to the cylinder and does not rotate. The aforementioned kinematic relationship enables Three-rotor The trajectory of the vertex (That is, the shape of the cylinder wall) looks like an "8." Three-rotor The cylinder is divided into three independent chambers, each of which sequentially completes the processes of intake, compression, power generation, and exhaust. Three-rotor Rotate once, and the engine ignites and performs work three times. Due to this mechanical relationship, the output shaft rotates at three times the speed of the rotor—similar to how the piston and crankshaft operate in a reciprocating engine. A 1:1 motion relationship is entirely different.

　　The advantages of a three-rotor As follows ：

　　 1. Excellent reliability and durability. Three-rotor The rotational speed is one-third of the engine's RPM, so Three-rotor Wear is minimal. Additionally, since there are no high-speed mechanical components like rocker arms or connecting rods, it remains more reliable and durable even under heavy-load operation.

　　 2. With a simple structure and power output no lower than that of a reciprocating engine, the rotary engine eliminates the need for connecting rods and a valve train—components that are essential in conventional reciprocating engines.

　　 3. The torque is remarkably smooth, with the rotary engine delivering a consistently even torque curve across its entire RPM range. In the dual-rotor design, operational torque fluctuations are comparable to those of an inline-six engine, while the three-rotor engine outperforms even the V8 reciprocating engine.

4. Three-rotor Although the engine is compact and packs a powerful punch, its major drawbacks are high fuel consumption and low durability.

5 Poor durability—basic engines typically don’t last even 200,000 kilometers and often require major overhauls, which can be quite troublesome to repair. When faced with significant engine issues, you’ll need Called Professional Come to help.

I believe that after the introduction above, everyone now has a better understanding of The working principle of the three-rotor engine And have also gained a certain understanding of the related advantages. Three-rotor Its emergence has provided significant assistance to our industry. Thanks to its excellent performance, it has boosted efficiency across the board. Generally, to get the three-rotor engine to achieve Better The emission standards are very challenging. (But it's not impossible, either.) But Manufacturing costs are higher, primarily because its production volume isn’t as large as that of a piston engine. In general, it consumes more fuel than a piston engine, as the narrow combustion chamber and low compression ratio reduce thermodynamic efficiency. So, regarding Three-rotor We must continue exploring relentlessly.