Brake controlling apparatus for electric vehicle

A brake controlling apparatus installed in an electric vehicle provided with a hydraulic braking means and a regenerative braking means, wherein said hydraulic braking means includes a fluid pressure generating means for generating a fluid pressure in accordance with the command for braking and a fluid pressure applying means having a characteristic in which the fluid consumption rises in the fluid-pressure range of 0 to P.sub.0, and brakes driving wheels by the fluid pressure of said fluid pressure applying means, and said regenerative braking means brakes the driving wheels by the regeneration of the power of a driving motor, said brake controlling apparatus comprising:

• a fluid flow cut-off means for cutting off the flow of hydraulic fluid from said fluid pressure generating means to said fluid pressure applying means when the fluid pressure of said fluid pressure generating means exceeds P.sub.0 ;
• a fluid flow inducing means for inducing the flow of hydraulic fluid from said fluid pressure generating means to said fluid pressure applying means while maintaining the pressure difference between said fluid pressure generating means and said fluid pressure applying means when the pressure difference exceeds .DELTA.P.sub.r ;
• a fluid consuming means for consuming the hydraulic fluid of said fluid pressure generating means with the characteristic approximate to the fluid consumption characteristic of said fluid pressure applying means when said fluid flow inducing means is inoperative;
• and
• a regenerative braking controlling means for controlling said regenerative braking means in correspondence with the pressure difference between said fluid pressure generating means and said fluid pressure applying means;
• wherein the fluid consumption characteristic observed at said fluid pressure generating means is approximate to the fluid consumption characteristic of said fluid pressure applying means.