Abstract:
피리딘을함유하는유기화합물의 ortho 위치에알킬을도입하는방법에관한것으로, 상기방법은피리딘에결합된치환기의종류에영향받지않고, 도입되는알킬의종류에영향받지않고, 피리딘의 N 기준 ortho위치에높은위치선택성및 높은수율로알킬화를수행할수 있는바, ortho 위치(피리딘 N 기준)에알킬이도입된피리딘구조를함유하는화합물의제조에유용하게사용될수 있다.
Abstract:
The present invention relates to a method for controlling braking of a vehicle according to the conditions of road surfaces wherein the determination of regenerative braking power and the distribution of the braking power of front and rear wheels during the vehicle is driven are made according to the conditions of road surfaces, thus preventing braking distance from being increased due to the occurrence of wheel lock of the vehicle, minimizing the stopping of the regenerative braking, and thus preventing the fuel efficiency from being lowered. According to the present invention, the method includes the steps of: calculating a braking acceleration and deceleration velocity required by a driver and a road surface friction coefficient if braking is required from the driver; comparing the braking acceleration and deceleration velocity required by the driver with the road surface friction coefficient and if the braking acceleration and deceleration velocity required by the driver is less than the road surface friction coefficient, obtaining a maximum acceleration and deceleration velocity wherein wheel lock does not occur when braking is conducted with only driving wheels; comparing the maximum acceleration and deceleration velocity with the braking acceleration and deceleration velocity required by the driver and if the maximum acceleration and deceleration velocity is less than the braking acceleration and deceleration velocity required by the driver, determining the regenerative braking power of the driving wheels and the friction braking power of driven wheels according to the road surface friction coefficient; and controlling a driving motor and a friction braking part so as to generate the determined regenerative braking power and friction braking power. [Reference numerals] (AA) Start; (S11) Calculate acceleration and deceleration (D) for required braking; (S12) Calculate friction coefficient (쨉) of road; (S13) Calculate acceleration and deceleration of vehicle (D_y); (S15) Calculate maximum acceleration and deceleration ((D_f_2) when braking the front wheel; (S16) Stop regenerative braking (ABS control); (S18) Apply regenerative braking to the front wheel and friction braking to the rear wheel, Braking force for the front wheel =F_f, Braking force for the rear wheel = Total required braking force - F_f; (S19) Apply regenerative braking to the front wheel