The rotor engine makes Mazda famous, but this unique secret has a congenital technical bottleneck. Even if Mazda engineers have been fighting for it for decades, the rotor engine is still difficult to compare with the traditional internal combustion engine in terms of durability, economy and environmental protection. With the discontinuation of the RX-8, Mazda has invested its research and development efforts in the environmentally-friendly and energy-saving SkyacTIv technology in recent years. For a long time in the future, perhaps the rotor engine has no hope of resuming production, but mentions Mazda, fans. We will always remember this passionate engine.
On June 23, 1991, it was destined to be remembered by the Mazda brand. On the day of the 24 Hours of Le Mans, the Mazda 787B with a rotor engine won the second place with a huge advantage. In 1992, the Mazda 787B lost its qualifications as the rules of the game were revised. It is even said that the 787B was banned because the rotor engine was too "black technology". Is this really the case?
The development of the rotor engine in the automotive field is not a smooth one, it can even be said to be twists and turns. Japan’s Toyo Industries (predecessor of Mazda), after obtaining a manufacturing license on February 27, 1961, has made more research and improvement than any car manufacturer in the world, and finally launched the first Cosmo Sport 110S with a rotor engine in 1967. This is even four months before the patent owner, NSU's first rotary-engine car. The most important thing is that Mazda's products completely surpass the opponent in terms of technical level and durability.
Generally, when the crankshaft reciprocating engine is working, the piston reciprocates linearly in the cylinder. In order to convert the piston from the linear motion into the rotary motion by the force exerted by the combustible gas, the crankshaft linkage mechanism must be used. The rotor engine is different, which directly converts the combustion expansion force of the combustible gas into the driving torque.
This is why? This has a very large relationship with the characteristics of the rotor engine itself. The triangular rotor of the rotor engine uses the apex angle to divide the cylinder into three separate spaces. The three spaces respectively complete the intake, compression, work and exhaust, and the triangular rotor rotates for one week. The engine is ignited three times.
The output shaft rotates three times faster than the rotor's rotation speed, which is completely different from the 1:1 motion relationship between the piston and the crankshaft of the reciprocating engine. As a result, the rotary engine has no high compression ratio of the reciprocating engine, and the result is insufficient combustion, fuel consumption and pollution far exceed the reciprocating engine.
The owners of the Mazda RX-8 even came up with a set of experience to ensure that the engine can be used more than 100,000 miles, that is, the hot car is more than five minutes each time. The oil temperature does not reach a certain value and must not be turned off. Check the condition of the oil. The red wire must be pulled once a day to remove the carbon deposit. The ignition coil and spark plug must be replaced frequently. As a result, the RX-8's car money and time cost will be greatly improved, which also led to the launch of the rotorless engine model after the RX-8.
Was the Mazda 787B racing banned because of "black technology"? This is not the case. The biggest feature of the Group C racing specification in which the Mazda 787B is located is that there is a limit on the total fuel consumption. Although there is no limit on the engine exhaust, the closed body of the vehicle with the lowest weight and two seats is included. There are provisions for the total fuel consumption used in running the race distance. In other words, vehicles participating in this group must meet the requirements of low fuel consumption and high efficiency. In addition, the annual specifications will also change the vehicle specifications. By 1992, the Group C car began to advocate the use of the same form of engine as the F1, which led to the loss of the 787B with the "alternative" engine.
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