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Adhesion coefficient on the synchronization Thoughts


F, and the rear sliding movement in the same direction,[link widoczny dla zalogowanych], thereby increasing the rear wheel slip. Figure 3. A) Circle 3 slip rear axle movement when the status of the introduction of bow and consulting 1O 2003 technical advice even if not of the lateral force may also cause severe sliding, and even turn lead to serious car accident. Therefore, the higher the car a good road adhesion coefficient on the emergency brake before locking the rear wheels slip-prone, low friction coefficient in the ice and snow, muddy roads, wet roads prone to the emergency brake before the front wheel Hugging the loss of steering ability. When the actual road adhesion coefficient is equal to synchronize the adhesion coefficient, ie 'P =' Po, the,[link widoczny dla zalogowanych], inevitable phenomenon of locking both front and rear wheels. But this road is difficult to find, 'P can not exactly equal to the' Po, so under normal circumstances is not locking the rear wheels before the front wheels locking first, but not both front and rear wheels locking. Fourth, auto synchronization adhesion coefficient 'Po size analysis of urban road is better, higher friction coefficient, the vehicle also higher friction coefficient simultaneously, rather the first locking the front wheel,[link widoczny dla zalogowanych], but not before locking the rear wheels have dangerous skidding. So cars have a high friction coefficient simultaneously. Rural roads and the wet mountain road adhesion coefficient is lower, more curved hill, slope under the chicane before the front wheel brake locking when the car easy to lose steering capabilities, very dangerous. More often due to vehicles traveling in the mountains to get a low number of simultaneous attachment coefficient. Table 2 for several road adhesion coefficient. Table 2 road adhesion coefficient of road adhesion coefficient of asphalt or concrete (dry) O. 75 ~ 0.9 Asphalt (wet) 0.45 ~ 0.7 Concrete (wet) 0.4 0.7 0.6 0.8 gravel dirt road (dry) 0.6 ~ 0.7 dirt road ( wet) 0.07 0.4 0.55 0.2 made snow trucks generally lower friction coefficient simultaneously, 'P. ' P . In addition to snow and ice, the emergency braking occurs when the first locking rear side skid or tail insecurity. No-load situation is even more serious. So, if you must warn myself not to drive fast, be careful driving, try to avoid using the emergency brake. This awareness of active safety factors will preclude potentially unsafe. Similarly, the driver familiar with the flick synchronous sliding friction coefficient in the event of such principles will be when the front wheel skid,[link widoczny dla zalogowanych], skidding in the opposite direction should hit the steering wheel; there should be rear-wheel spin direction of the steering wheel to slip, this passive safety awareness can reduce or even eliminate accidents. If the car driver to manipulate the adhesion coefficient sync ~ Po = 0.9, then any road will not appear on the emergency brake before locking the rear wheels slip phenomenon. In the chaotic city traffic order and mixed traffic on the highway, would rather be locking the front wheel locking before the rear wheels do not,[link widoczny dla zalogowanych], so prefer to transfer large number of front-wheel braking force to a large number of simultaneous attachment coefficient, and loading cargo Lower flat as possible, so that the centroid height reduced, the adhesion coefficient increased simultaneously. Six, auto sync detection methods are generally adhesion coefficient detection steps: (1) axis moment of L (measured or check the manual) (2) pedal power (sub two tranches of records) FP 'two steps before and after the brake pedal force under the braking force F () l, F () 2 ', F () l, F () 2 (4) horizontal distance from the center of mass from the rear axle b: == L, Fd, and the front and rear axles Netherlands (including the left and right wheels) (5) centroid height hg (measured by standard 【4) (6) Find the auto sync adhesion coefficient 'p. where p = (p''+ p'') / 2LI3 a b ~ Po must be pointed out that the measurement of braking force front and rear brakes, you must not locking the wheels under the premise of selecting two anchor pedal stroke to maintain constant pedal force of two, and then read and record the front and rear wheel braking force value F0)., F '¨ 2 and F'l, F'2
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