What is the experience of overhauling the Mazda RX-7 rotary engine in China?

First, splash the cold water of Mazda powder. The rotary engine is not invented by Mazda, and it is not a patent of Mazda. However, Mazda has indeed carried forward the rotary engine with its unyielding spirit. Well, at least it was once glorious!

Some people say that the rotor engine is one of the most beautiful engines. The Lelo triangle: Based on an equilateral triangle, draw an arc with each vertex as the center and the side length as the radius. The three arcs intersect. The enclosed figure is the Lelo triangle.

The rotor rotates in the stator of the kidney bean-shaped outer roller curve. The rotation of the triangular piston is directly converted into the rotational kinetic energy of the crankshaft, which is also smoother than the reciprocating piston; the rotor engine does not need a Engine Camshaft For Mercedes Benz The shaft, valve, valve spring and other complex air distribution mechanisms can complete the air exchange by relying on the scavenging process of the rotor itself. There is no sound of the camshaft knocking the valve rocker arm, which is a little manic exhaust sound, which makes the rotor engine possess A unique voice that can't be compared with 'V'.

I have to say that the charming Lelo triangle and the roaring sound of a mad cow, fall in love with its really TM poison. Feeling obsessed with sleepless night, while being troubled by tedious maintenance and overhaul, it is difficult for you to sleep well anyway.....

The design of the rotor engine is so exquisite and there are few driving parts. Why is it so difficult to popularize? I believe that children’s shoes who have thoroughly understood the rotor know that the rotor's engine combustion chamber is worn out and needs frequent overhaul. This is enough to stop those who fall in love with him....

Lightweight and compact is a major feature of rotary engines. When this engine is used in RX-7 When the body is removed, you will find that its body is composed of two rotors, which are much smaller than the four-cylinder engine, and there are fewer parts.

The displacement of a single combustion chamber of a rotor engine is 654cc, and the double rotor is 1308cc. Then because the rotor engine has a higher work density, the rotor One revolution makes each combustion chamber do one work, while the reciprocating piston engine requires each cylinder to complete a complete four strokes, which requires two revolutions. Therefore, the work density of a rotary engine is that of a reciprocating engine. double. In many countries, the actual displacement of a rotary engine is multiplied by 2 when paying taxes and calculating emissions, and even in motor races. So the 1.3-liter 13B engine is actually counted as 2.6-liter. This is why the RX-7's rotary engine can easily push the RB26, 2JZ and other 'bull lungs' to use the T04Z, T88-33D and other giant turbines freely.

The main perimeter of 13B is scattered on the ground Parts.

Open the engine combustion chamber, the rotor is actually present In front of everyone.

Because the rotor engine has fewer parts, the space that can be lifted is limited. The problem of large wear and tear on the inner wall of the combustion chamber, poor sealing, and frequent overhaul is also well-known. Many car fans who play with rotors will use special rotor machine lubricants, and fill the oil tank with oil to improve the lubrication effect. But even so, the life of the rotor is far less than that of a general reciprocating engine.

The parts that need to be replaced this time are here, all of which are original parts ordered back from Japan.

The rotor engine has low torque and high speed The characteristics of the combustion chamber will have varying degrees of wear after long-term operation. At this time, you need to make a fuss on the rotor. The first thing is to grind in the range of each corner seal and both side seals of the rotor, and finally form a trapezoid with the middle height and the two sides low, which can effectively reduce the wear of the inner wall of the combustion chamber and reduce the engine failure rate. , At the same time, the high engine speed has also been improved accordingly.

Another problem is that the rotor rotates in an elliptical space in an eccentric circle, which is similar to the diamond of a piston ring. As the main part to ensure the air tightness between the three surfaces and the cylinder wall, the seal is controlled by the spring plate under the diamond seal to expand and contract with the cylinder wall. After a long time of rotating the diamond seal and the spring of the diamond seal, aging and wear will occur. This results in a decrease in engine performance and even scratches in the cylinder wall. Therefore, it is necessary to replace the stronger diamond seal and the diamond seal spring during the modification process, and the replacement of the diamond seal and the diamond seal spring of different strength can obtain different modification effects.

Seriously, playing modification itself is tiring, and playing with the rotor engine on this basis is the heart Tired to the power of N....... However, as one of the four great demon gods in Japan, the rotor has a unique voice, unique characteristics, and unique driving feeling....... This is what has always supported falling in love The reason for RX-7.......

Since the rotary engine is quite compact, it is installed in RX-7 After the body, it can be placed behind the front axle to achieve the effect of front center placement and optimize the front and rear counterweight ratio. The rest of the front of the car can give full play to a lot of imagination, such as a larger intercooler, and the angle can be placed horizontally, separated from the position of the water tank, to avoid heat interference.

If one day, you are playing modified Feeling tired on the road, then you should think about it, do these tired modifications make you feel that life is full of passion and dreams? ! If so, then that's enough.....

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