换挡踩几脚离合器（Shifting clutch）

换挡踩几脚离合器（Shifting clutch） 换挡踩几脚离合器(Shifting clutch) Why should you press the two foot clutch when changing gears? In the course of the automobile driving, there is a requirement to change the gear, that is to say, you should step on the two leg clutch when changing gears. Why is that? A car driving transmission by low level gear change into a higher gear operation called upshift, upshift in the process, due to the first gear or gear pair speed circle line engine driven shaft and intermediate shaft and the first to be changed into different, prone to collision the sound of gear, so people driving in the long-term practice, summed up the method of upshift when clutch on two feet, in order to reduce the collision between the gear. Stomp on the clutch was designed to use the clutch engagement speed has been reduced, the engine drives the transmission shaft of the first, the first shaft and intermediate shaft speed is reduced, and the approach to be changed into a higher level gear gear shaft and gear sleeve side peripheral speed, not because the gear circumference speed difference excessive impact of noise and even cause gear meshing damage, soft and silent. Of course, even on a short pause time between two feet to the benefit of clutch, friction clutch, clutch friction plate can reduce the friction temperature and wear; at the same time reduce the wear of transmission gear between the. Two, the transmission from a high gear shift to lower level gear operation is called downshift or downshift, driving tutorial also requires in the stall when two feet clutch, add one foot empty oil. The purpose is to increase the engine speed with the method of adding air oil. It is the clutch pedal shift, lift the clutch pedal to engage with a free oil, increase the circumferential speed of the transmission shaft and intermediate shaft first, will change into close agreement with the low level of gears and gear pairs around the speed, so as to avoid collision and damage of gear. This method is effective in driving the synchronizer is not installed, with the improvement of design level of automobile, most vehicles are installed in the transmission synchronizer, can make the transmission shaft and the intermediate shaft and the first to be changed into the gears and gear pairs achieve synchronous speed, reduce the the gear of the collision, also reduces the noise. Well, in the modern import or domestic car driving, but also do not have to step on the two feet clutch? Of course, without stepping on the foot, the clutch will shift smoothly and without the clash of gears. But from the point of view of the extended clutch, the friction disc and the synchronizer of the transmission, it is good for the vehicle to step on the two foot clutch. The clutch can be slightly stopped in the middle of the two foot clutch, so as to reduce the abrasion of the clutch friction plate and reduce the temperature produced by friction of the clutch friction plate. Therefore, driving a vehicle with a synchronizer, stepping on the two foot clutch is beneficial to the car. Downshift skills at high speed The general gear is used when the speed is lowered and the driving power of the engine is not enough. If the speed is down, it's easy to come back down. Just press the clutch and gently turn the gear shift into the low gear. But, if the car is in high speed, it is not easy to operate smoothly. This is because when the car in high speed, synchronous speed gear and the engine is very fast, if easy to downshift, bigger than the engine gear, there must be multiple rounds, the gear is engine there must choose smaller to match. When the clutch is released, due to the huge inertia car that is connected to the drive shaft of the gear is still at a higher rate of rotation, then the engine becomes slow due to rotation, a gearbox connected with the engine gear slows, on both sides of the gear speed difference, can not be synchronized connected. At this point, if the usual way to downshift, it is difficult to gear stalls low. If you want to change gears easily, you must increase the speed of the engine so that it can be close to the gear speed at the other side of the transmission shaft. The method of improvement is to use the time to dial the neutral time, combine the clutch, and empty the fuel door to increase the speed of the engine. Then, the clutch is cut and the lever is switched into the lower position, combined with the clutch, Complete downshift. This method is known as the double clutch method". This procedure is summarized as follows: (1) driving throttle open; (2) the clutch; (3) into the gap, put the clutch; (4) and (5) air throttle; clutch; (6) dial into the low level; (7) put the clutch and gas. In fact, this "double clutch" method in the original car gearbox without synchronizer, is every driver must master the skills. And now the car generally use synchronizer, so only in high-speed downshift, it is necessary to adopt the "double feet clutch" method". Especially in the highway, in high speed to downshift, if you start on the brakes, in case the brakes do not work, there will be dangerous, if the brakes are too strong, but also afraid of the last brake disk burned and cause recession. So, by this means, it will be safer to use the engine to reduce the speed to 50 to 60 kilometers per hour and then to step on the brakes.