motor vehicle with a hybrid drive

Abstract

Motor vehicle with a hybrid drive comprising at least one wheel (4, 6, 8, 10) that can be driven by an electric machine, wherein a recuperation device is provided which enables energy recuperation during a braking process in a recuperation phase, wherein a braking system (12) is provided with a pedal (14), at least one master brake cylinder (18, 20, 26) and at least one wheel brake (22, 24, 28, 30) which fluidly actuates the wheel brake (22, 24, 28, 30) by means of a brake pressure due to a movement of the pedal (14) and a movement of at least one piston in the braking direction in the master brake cylinder (18, 18'), wherein a pressure reducing valve device (36) is provided which reduces the brake pressure in the recuperation phase and wherein a compensator (18) is provided to compensate for a hydraulic effect of the pressure reducing valve device (36). is provided for, characterized by,that at least one further master brake cylinder (20) is provided, which has at least one first and one second piston (44, 46) which are coupled to each other via a first connecting element (48) and divide the master brake cylinder (20) into at least three chambers (50, 52, 54), of which at least one first and one second chamber (50, 52) are designed as hydraulic chambers and the third chamber (54) has a compensating element (56, 57) and is designed as a compensator with a return function, wherein the first piston (44) has a through-opening (66) for fluidic connection of the first chamber with the second chamber (50, 52), wherein the first piston (44) is coupled by a second connecting element (62) against the braking direction to a piston (64) of a hydraulic actuator (42) of the pressure reducing valve device (36), and a stop element is provided for the first or the second piston (44, 46). (60) is provided for, such asthat the master brake cylinder (20) also performs the function of a pressure control unit.

Images