Speaking of the three-cylinder engine, I believe that the first thing that people think of is Xiali, Alto and so on, and they want to be 'famous in the domestic auto market. But because they have certain defects, jitter and The noise and other problems have not been solved, and the three cylinders have gradually been forgotten by everyone.
However, in recent years, with the rapid development of turbo technology, the three-cylinder turbocharger has gradually returned to people's field of vision, and more and more models are equipped with three-cylinder engines such as: Buick, BMW, Toyota Even the newly introduced Lectra 02 is equipped with a three-cylinder engine.
However, there are still many consumers who are difficult to accept the three-cylinder engine and even think that the manufacturer is deliberately changing to a three-cylinder engine in order to save costs. In fact, the three-cylinder engine has many advantages over the four-cylinder engine!
1, less mechanical friction
Because the three-cylinder mechanism is simple and the mechanical friction surface is relatively small, the three-cylinder engine has one set of piston connecting rods less than the four-cylinder engine, and the four opening and closing mechanisms of the intake and exhaust valves are eliminated, and the crankshaft and the camshaft are also shortened. These components are the bulk of the engine's friction loss. Therefore, the mechanical wear loss becomes smaller, and the disguise increases the engine thermal efficiency.
2, small size, light weight
Because the displacement is small and the number of cylinders is one less, the weight of the three-cylinder engine is lighter, which brings great convenience to the later maintenance. At the same time, the weight and compactness of the engine are also in line with the general trend of vehicle lightweighting. Reduced vehicle load, resulting in a more enjoyable operating experience! And the three-cylinder engine also saves space inside the hood, and can do better in safety.
3, better low speed torque
Compared to a small-displacement four-cylinder engine, the three-cylinder engine is obviously more powerful than a small-displacement four-cylinder engine. The fewer the number of cylinders in the same displacement engine, the lower the torque. The more the volume of each cylinder Large, bore and stroke will be larger, which means that the lower the torque, the lower the torque of the same displacement three-cylinder supercharged engine will be better than the four-cylinder supercharged engine.
4, smaller turbo lag
In fact, under the current turbine trend, the most urgent need to solve is the turbine hysteresis problem. The three-cylinder engine has better low-speed torque and smaller turbo lag than the four-cylinder engine. The three-cylinder engine has no exhaust interference, and it is easy. The characteristics of the turbine rotation are promoted. So in the past, BMW made the exhaust pipe of the N553.0T single-turbine engine into a double-coiled tube, one for every three cylinders, in an effort to reduce the turbo lag.
5, low fuel consumption, save money
Because the displacement is small, the less the power output, the greater the difference in fuel consumption, so the three-cylinder engine is more fuel-efficient than the four-cylinder engine! Now the three-cylinder engine is still being upgraded, and the fuel consumption may be reduced in the future. Lower!
Summary: Although the three-cylinder engine has three shortcomings of large vibration, high noise and small horsepower, it has basically been solved with the continuous development of technology. I believe that the future three-cylinder engine will be better and better. At the same time, due to the national emission policy, small turbocharged engines and hybrids must be the future direction of technology development. In this context, the three-cylinder engine is a very good choice.
