Judging from the acceleration time of 0- 100km/h, Yi Rui's performance over 12 seconds is really not very good. Through the data, we find that the acceleration of Yi Rui at the initial moment is not large, and the duration is not long. After analysis, we found that Yi Rui would be obviously disturbed by the stability system at the start moment without closing the electronic stability program, and the electronic system would actively intervene to limit the engine power output after the tire slightly slipped, resulting in the loss of acceleration time. During the shift in Yi Rui, the vehicle performance is relatively stable, and the shift impact is slight. At the same time, combined with the actual driving experience, we think that the acceleration process in Yi Rui is smooth. However, due to paying more attention to the comfort and smoothness of daily driving, Yi Rui's acceleration after shifting to the third gear was relatively not violent enough, so it also lost some time to some extent. In fact, 0- 100km/h doesn't mean anything. What really examines the vehicle power reserve is the mid-way acceleration test. At 60-80km/h, the acceleration reached 3.4 18 seconds. From the data, we can see that Yi Rui's gearbox downshift response is very good. If it is a downshift, Yi Rui can basically complete the downshift while stepping on the gas pedal. Only in the case of downshifting two gears can we see the signs of downshifting of Yi Rui gearbox from the data. Yi Rui's braking response is very good. It can be seen from the data graph that the deceleration reaches the maximum after the test driver starts to step on the brake pedal for about 0. 15 seconds, which indicates that the braking system in Yi Rui is "car-following" and Yi Rui can stop before other cars in the same emergency. During the whole braking process of 100-0km/h, the deceleration of Yi Rui remained relatively stable, and the vehicle jitter caused by the ABS anti-lock braking system was not severe, and the body posture was very good. The maximum deceleration reaches 1. 1g, which shows the lack of tire grip to some extent. No matter which direction the grip of 205mm Hankook tire is, it can't match the sports characteristics of Yi Rui well. I believe that if we replace a set of tires with better performance, Yi Rui's brakes will be significantly improved. Finally, thanks to the excellent braking response, the best braking test score of Yi Rui 100-0km/h is about 4 1 m, and the average braking score of the four groups is about 43 m, which is still very advantageous compared with the Accord and Camry of the same level. Aside from Yi Rui tires, Yi Rui performed better in the elk test than in the pile test. Good lateral acceleration stability and relatively stable speed show that Yi Rui chassis has good skills in training. Of course, in the elk test, we still failed to turn off the electronic stability system in order to restore the most common driving state. Therefore, according to the data curve, the speed of Yi Rui is still disturbed by the electronic stability system. Judging from the data curve of 60km/h, Yi Rui performs best in this speed state. Although there will be a "tire rattle" sound, the vehicle will "obey" the driver's intention and follow the predetermined trajectory. Of course, the understeer feature of front-wheel drive also exists in IRI. If the test speed is increased repeatedly, Yi Rui will still be unable to follow the predetermined trajectory because of the appearance of "pushing head", and the rear of the car will swing slightly because the tire breaks through the grip limit, which will greatly affect the test results. It can be said that Yi Rui's excellent chassis is not equipped with tires with good performance, which is the main reason why Yi Rui can't give full play to its handling performance in the test. As a mid-level car with outstanding sports characteristics, Yi Rui's performance in noise is amazing. Because if compared with the Audi A6L, the whole noise test shows that the constant-speed noise of 120km/h is slightly higher than A6L, and all other speed levels contain idle noise, and the sharp edge is lower than A6L, even the idle noise is as much as15dB lower than the Audi A6L. Don't forget, Audi A6L is a high-end commercial vehicle, and its positioning and price determine that it can reduce driving noise and improve comfort at almost no cost. Even so, in front of Yi Rui, the noise level of A6L is still a bit small, so it is conceivable to what extent the noise control in Yi Rui has reached, and it is also conceivable that the cost in Yi Rui is higher than that in the same level. To sum up, the main reason is that Yi Rui's engine runs quietly, and even in the state of rapid acceleration, it will not produce disturbing noise. It can be seen from the idle noise that the idle speed in Yi Rui is only 34.9 dB, which is not much different from the original static noise of 365,438+0.4 dB, and the engine runs smoothly. Then the excellent performance of the uniform noise part is mainly due to the excellent body sound insulation measures of IRI and the ultra-low drag coefficient of 0.27. It is difficult to find an opponent before the noise level of Yi Rui 100km/h/h, and Yi Rui's steering is not strong, but there is no feeling of looseness. Because, every turn of the steering wheel will have a reaction, that is to say, Yi Rui's steering wheel is very small. At the same time, before the tire breaks through the grip limit, Yi Rui's steering system will directly convey the driver's intention to the body. Yi Rui's understeer starting point speed can reach more than 35km/h, which is already a good result. During the test, Yi Rui's turn was still accurate. After reaching the speed of the starting point, the circular motion radius of the vehicle begins to increase, and at the same time, the tires feel hard, not as soft as Michelin tires, and can "stick" to the ground. Therefore, it is the tire that affects the performance of the understeer test. Of course, as a front-wheel drive, Yi Rui is bound to have more obvious understeer characteristics than a rear-wheel drive. We can also feel that there is understeer when the lateral acceleration is about 0.9g, but in fact, Yi Rui's body posture gives people the feeling of being practical. Yi Rui's steering system has an obvious feature, that is, the steering feeling is relatively light at low speed; When the speed is high, the steering feeling will be heavier. This setting shows that the manufacturer has spent a lot of time. Because, what is needed at low speed is a lighter steering sense to turn, turn around, stop and so on. When driving at high speed, what is more needed is the stability of straight driving, and the stability of straight driving must first ensure the stability of the steering wheel, so it needs relatively heavy power. Yi Rui turns back to the right in less than 0.4 seconds before 30km/h, which means that the steering assist system will "help" more steering force, so it turns back faster, which is beneficial to the portability of driving. After "releasing" the steering wheel, Yi Rui will also produce a steering residual angle like most models. It should be said that it is necessary to leave such a surplus angle, at least to give the driver a room for correction. 5.29L/ 100km, the lowest constant fuel consumption in Yi Rui occurs when the vehicle speed is 60 km/h ... Considering the close relationship between the constant fuel consumption and aerodynamics, here is to introduce the drag coefficient of Ruiyi: 0.27! What kind of concept is 0.27? BMW 3 Series has its own aerodynamic wind tunnel with drag coefficient of 0.26 and mercedes benz c class of 0.27. It's incredible that Yi Rui actually reached this value. What does a lower drag coefficient mean? This means lower air resistance, lower wind noise, better driving stability and, of course, lower high-speed fuel consumption. It can be seen from the data that after the speed level of 60km/h, which is the lowest fuel consumption, Yi Rui's fuel consumption did not increase slowly until 120km/h, and the main reason for the increase of fuel consumption with the increase of speed was the increase of wind resistance. Therefore, thanks to the good aerodynamic design of IRI, Yi Rui's fuel consumption at high speed is not high. At the same time, the solid body and excellent suspension system make Yi Rui's body light, and the self-weight of 1458kg means that Yi Rui has already accounted for one and a half tons of vehicle weight. At the same time, the cruising speed in Yi Rui is not high, and 120km/h is about 2400 rpm, which greatly reduces the noise and fuel consumption of vehicles driving at a constant speed. Finally, the performance of 8.98L/ 100km constant speed 120km/h belongs to the middle and upper reaches compared with the same class of vehicles. For the safety of vehicle driving, there will always be some deviation between speedometer and real speed. Through the test of speed deviation (actual speed), we can know the corresponding relationship between speedometer and actual speed.