What is the principle of a rotary engine?

[LeBeckett]

The principle of a rotary engine is to use the rotational motion of a triangular rotor to control compression and exhaust, converting the combustion expansion force of combustible gas into driving torque. Engines are classified based on combustion principles into: 1. Internal combustion engines: Fuel burns inside the engine; 2. External combustion engines: Fuel burns outside the engine; 3. Gas turbines: Combustion produces high-pressure gas, which drives the turbine blades to rotate; 4. Jet engines: Directly generate reactive thrust through high-speed airflow ejected from the nozzle. Engine maintenance methods include: 1. Using high-quality engine oil; 2. Using qualified coolant; 3. Regularly cleaning the radiator scale; 4. Periodically removing carbon deposits from the car; 5. Timely replacement of the car's three filters; 6. Maintaining a reasonable engine speed.

[JasonLee]

The design of the rotary engine is truly ingenious, utilizing a triangular rotor that rotates within an oval-shaped chamber to operate. Unlike piston engines that move up and down, this rotor completes four steps in a single rotation: drawing in the air-fuel mixture, compressing it to make the mixture denser, igniting it with a spark plug to drive the rotor's rotation, and finally expelling the exhaust gases. Throughout the process, the rotor continuously spins, with each corner handling different tasks, resulting in exceptionally smooth operation, low noise, and high power density. Mazda cars like the RX-7 have used this engine, offering quick acceleration and a lightweight feel. However, this design demands high sealing precision, which can lead to increased fuel consumption over time and challenges in exhaust treatment, making it less common in modern vehicles.

[AriannaAnn]

I used to drive a Mazda RX with a rotary engine, and it left a deep impression on me. Its principle was quite simple: a small triangular thing rotated inside the engine, and with each rotation, it sucked in air, compressed it, ignited it to generate power, and then expelled the exhaust. Without pistons, there was much less vibration, making it incredibly smooth and quiet—it felt like flying at high speeds. Unfortunately, it guzzled fuel like soup, and I was always at the gas station. The rotor seals were also prone to wear, making maintenance a hassle. Nowadays, they're rare, but classic car enthusiasts still miss that unique power feel.

[Patrick]

The rotary engine is essentially a spinning triangle performing tricks inside an oval chamber. With each rotation, it completes all tasks: first drawing in the air-fuel mixture, then compressing it to increase pressure, igniting it to create an explosion that drives the rotation, and finally expelling the exhaust gases. Its piston-free design makes it compact, capable of high RPMs, and able to deliver substantial power output. Mazda pioneered its use in cars, but it's less common now due to higher fuel consumption and environmental concerns. Simply put, it's just a different way to make an engine work.

[Andres]

The rotary engine was an innovative invention by Wankel in the last century, breaking the concept of traditional pistons. Its principle involves a triangular rotor continuously rotating within a specially shaped chamber, where each rotation automatically completes the intake, compression, combustion, and exhaust processes through changes in volume. This design reduces mechanical components, making the engine lighter and more efficient, especially shining in 1960s racing cars. Mazda introduced it into mass-produced vehicles like the RX series, but its drawbacks were evident: low combustion efficiency leading to high fuel consumption, and sealing issues gradually led to its phase-out. Looking back at automotive history, this bold attempt still had a significant impact.

[LeCaden]

The triangular component of the rotary engine rotates within the chamber, completing the entire four-stroke cycle with each rotation: intake of air and fuel, compression followed by ignition, explosion-driven rotation to release energy, and finally exhaust of waste gases. Its advantages include lightweight design and strong high-speed power output, making it suitable for sports cars like Mazda's classic models. However, it also has several drawbacks, such as higher fuel consumption, difficulty in managing exhaust pollution, and the tendency for sealing rings to wear out, requiring frequent maintenance. Modern vehicles predominantly use piston engines due to their better environmental performance, but the rotary engine has still left a valuable legacy in automotive innovation.