40results about How to "Good braking feel" patented technology

The invention discloses a hybrid electrical vehicle (HEV) / electrical vehicle (EV) regeneration brake pressure coordinate control system based on antilock brake system (ABS) hardware. The system comprises a hydraulic brake subsystem, a motor regeneration subsystem and a control system for controlling the hydraulic brake subsystem and the motor regeneration brake subsystem; and the hydraulic brake subsystem comprises a vacuum assistance system, a brake main cylinder, an oil storage tank, a travel simulator, a front wheel ABS pressure regulation system, a front wheel brake wheel cylinder, a rearwheel ABS pressure regulation system and a rear wheel brake wheel cylinder, and a working cavity I of the brake main cylinder is communicated with the travel stimulator. In the HEV / EV system regeneration brake pressure coordinate control system based on the ABS hardware, the working modes such as pure motor brake, electrohydraulic combined brake, pure hydraulic brake, antilock brake and the like can be flexibly selected according to specific conditions, and accurate brake force is provided; when a brake pedal is trampled, the travel simulator can produce good retardation brake feeling; and during pressurization, an overflow valve and a solenoid directional valve can protect an oil pump I driving motor to ensure that a system can work stably.

The vehicle braking force generating device (11) includes: an electric motor (13), which provides driving force and regenerative braking force to the wheels (17) of the electric vehicle (V); V) The brake hydraulic pressure provided by the calipers (27); the skid information calculation unit (63), which calculates the skid information of the wheels (17); the VSA device (18), which at least performs The friction braking control of the wheel (17) is suppressed; the first diagnosis unit (67) performs the diagnosis of the VSA device (18); and the brake control unit (65) performs at least the electric motor ( 13) Coordinated braking control including at least one of the regenerative braking control and the friction braking control related to the brake fluid pressure generating device (26). During the regenerative braking control process involving the electric motor (13), if the behavior stabilization support device (18) falls into an abnormal state, the brake control unit (65) maintains the state of the regenerative braking control involving the electric motor (13) .

An electro-hydraulic braking system that reduces the liquid outlet of a master cylinder, including: a brake pedal and a pedal displacement sensor connected to the pedal; a secondary master cylinder with two through holes, the front through holes are directly connected to the reservoir The liquid tank is connected, and the rear end through hole is connected to two passages, one of which is connected to the pedal feeling simulator, and the other is connected to the front chamber of the master cylinder through the decoupling solenoid valve; at the same time, the left end of the secondary master cylinder piston is directly connected to the brake pedal , the right end is opposite to the central push rod of the electronically controlled linear motion module, and there is a gap; for the electronically controlled linear motion module, there is a push rod in the hollow part of the whole module, which drives the transmission mechanism through the motor to drive the push rod to move, thereby pushing the piston of the master cylinder The right end of the push rod is opposite to the first piston of the master cylinder, and there is a gap; the present invention has the characteristics of fast response, precise control of brake fluid pressure, better simulation of the driver's brake pedal feeling, and maximum recovery of braking energy. Contains dual fail-safe modes for high safety and reliability.

The invention discloses a brake control method for an electric vehicle use and a controlling device thereof, and belongs to the technical field of electric vehicles. The controlling device comprises wheels, wheel brakes, an electric-hydro complex brake ECU, a brake pedal, a brake pedal position sensor, a hydraulic control module, a hydraulic braking system, a motor, a battery, a vehicle speed sensor, a motor control module, an ABS control module, and wheel speed sensors. The method comprises the following steps: determining the braking purpose of a driver according to the driving state, the braking strength, and the state of the motor and the battery of the electric vehicle, determining and choosing a braking mode according to the braking purpose, the battery SOC value, and the state of the ABS, and conducting coordination control for the motor regenerative braking and the hydraulic braking to allow the electric vehicle to provide an excellent braking experience for the driver on the basis of guaranteeing the braking safety. Therefore, under the premise that the braking efficiency can be guaranteed, braking energies are recycled by utilizing the regenerative braking of the motor, and the energy utilization efficiency is improved.

The invention discloses a motor-controlled hydraulic braking system. The problem that the hysteresis influence caused by a motor during direction shifting and vertical movement caused by the condition that a brake pedal changes with pedal force are solved. The motor-controlled hydraulic braking system comprises a brake pedal mechanism, a master cylinder pressure generating unit, a brake pressure control unit and an electronic control unit. The brake pedal mechanism comprises an input push rod (6); the master cylinder pressure generating unit comprises a ball screw mechanism; the brake pressure control unit comprises a brake master cylinder; and the electronic control unit comprises a control signal output system and a signal collecting treatment system. The brake pedal mechanism is fixedly connected with an input push rod limiting plate (21) in the ball screw mechanism through the input push rod (6), the master cylinder pressure generating unit is fixedly connected with a master cylinder front cavity piston (26) in the brake master cylinder through a connecting shaft (25) in the ball screw mechanism, and the electronic control unit is connected with the brake pedal mechanism, the master cylinder pressure generating unit and the brake pressure control unit in an electric wire mode.

The invention discloses a sensation simulator of an automobile brake pedal. The rod-free cavity of a main braking cylinder is provided with a piston return spring and is respectively communicated with an oil storage cup and the input end of a two-position three-way solenoid valve; the brake pedal is respectively connected with the push rod of the main cylinder braking piston and a pedal travel sensor; and two output ends of the two-position three-way solenoid valve are respectively connected with a hydraulic control unit (HCU) and a simulator valve block. According to the sensation simulator,the braking sensation of a driver can be accurately obtained, and the pedal feeling of the driver can be fed back. The traditional hydraulic braking system is improved slightly, and the sensation simulator is installed on the main braking cylinder or is integrated with the HCU. The sensation simulator has the advantages of small volume, low cost and small difficulty. Under the condition that a motor-driven hydraulic braking system fails, the traditional hydraulic braking system can be subjected to emergent braking. The sensation simulator of an automobile brake pedal and the HCU guarantee good braking feeling under the coordination control of an electronic control unit (ECU).

The control unit 10 controls the braking forces respectively acting on a pair of independently working brake operating elements L1, L2, so as to perform anti-lock braking control and prevent the wheels from possibly being locked. When the brake operating elements L1, L2 are activated, the control unit 10 applies the braking force to one of the wheel brakes B1, B2 of a braking system different from the braking system operated by the brake operating element . When one or both of the brake operating elements L1 and L2 work, and the wheel may be in a locked state, the control unit 10 performs anti-lock control on the braking system of the wheel that is about to be in the locked state, and at the same time, the brake Power is applied to another braking system than the one that is about to be locked.

The invention relates to a composite braking system, which comprises a hydraulic braking system consisting of a brake pedal, a vacuum booster, a braking main cylinder, a hydraulic adjustment module, a braking wheel cylinder, a pressure sensor, a wheel speed sensor and a braking controller and a motor braking system, and is characterized in that: a push rod between the brake pedal and the vacuum booster is provided with a shock absorber; main valves are arranged on oil pipes on which two liquid inlets of the pressure hydraulic adjustment module are positioned respectively; the vacuum input endof the vacuum booster is provided and connected with a vacuum supply module; the vacuum supply module comprises a vacuum pump, a direct current motor, a pressure relay and a power supply; the output end of the vacuum pump is connected with both the vacuum input end of the vacuum booster and the reference pressure input end of the pressure relay through pipes; the output end of the pressure relay is connected with the input end of the direct current motor; the direct current motor is electrically connected with the vacuum pump; and the power supply supplies power to the direct current motor and the pressure relay. The system requires few changes in the hydraulic breaking system of an original vehicle, and can realize series braking energy recovery, guarantee a good brake pedal feel and be widely used in breaking energy recovery systems of electricity-driven vehicles.