39results about How to "Good braking feel" patented technology

A motor-driven electronic hydraulic braking system comprises a brake pedal, a pedal displacement sensor, a secondary master cylinder, a pedal simulator pressure sensor, a pedal simulator, pedal simulator solenoid valves, a push rod, an electrically-controlled linear movement module, a brake master cylinder and an ABS/ESP (anti-skid brake system/electronic stability program) module. The electrically-controlled linear movement module drives the push rod to move by means of driving a movement regulating mechanism through a motor, the motor is controlled through a displacement signal, and linear control on braking pressure is realized. The brake master cylinder passes the ABS/ESP module to be hydraulically coupled with vehicle wheel brakes. The ABS/ESP module can passively regulate pressure transmitted from the master cylinder to the wheel brakes, and can actively regulate the pressure of the brake of each wheel. The motor-driven electronic hydraulic braking system has the advantages of rapid response, accurate control on brake fluid pressure, capabilities of well simulating brake pedal feeling of a driver and maximally recovering braking energy, and the like; meanwhile, the system is designed with a dual failure protection mode, thereby having 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 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 end of 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.

The invention relates to an electro-hydraulic compound brake system for recovering the braking energy of an electric fork-lift. The system comprises a suction filter, wherein the oil inlet of the suction filter extends into oil in a hydraulic oil tank, and the oil outlet of the suction filter is communicated with the oil inlet of a gear pump; the oil outlet of the gear pump is respectively communicated with the oil inlet of an overflow valve and the oil inlet of a one-way valve; the oil outlet of the overflow valve is respectively communicated with an oil return opening T1 of a three-position three-way full-hydraulic power brake valve and the hydraulic oil tank; the oil outlet of the one-way valve is respectively communicated with an energy accumulator and the oil inlet P1 of the three-position three-way full-hydraulic power brake valve; the oil outlet of the three-position three-way full-hydraulic power brake valve is connected with a service braking device; and a pedal angle sensor is connected with the brake pedal rotating shaft of the three-position three-way full-hydraulic power brake valve through a coupler. The electro-hydraulic compound brake system realizes maximized regenerating braking energyrecovery by coordinated control of electro-braking and hydraulic braking, so that braking safety is guaranteed, and energy utilization is improved.

The invention discloses a hydraulic unit for an integrated automobile brake system. The hydraulic unit comprises a hydraulic valve block and further comprises a brake master cylinder, a motor, two hydraulic pumps, two switch valves, a second switch valve, four pressure-increasing valves, four pressure-relieving valves, an oil storage chamber and a pressure sensor which are mounted on the hydraulic valve block, wherein a brake master cylinder body is integrated with the hydraulic valve block; a piston of the brake master cylinder is arranged in the brake master cylinder body; the piston of the brake master cylinder is connected with a brake pedal through a push rod; the motor is mounted on the hydraulic valve block and is connected with the hydraulic pumps; and the oil storage chamber which is connected with the hydraulic valve block is connected with two oil inlets of the brake master cylinder body through oil channels on the hydraulic valve block and also is connected with the outlets of the pressure-relieving valves and the oil inlets of the hydraulic pumps. The hydraulic unit for the integrated automobile brake system has the advantages of simple and compact structure, low cost, energy conservation and environmental protection, wide application scope, powerful function, high speed in establishing braking hydraulic pressure, benefit to the reduction of braking distance, and capability of increasing the driving safety. The hydraulic unit for the integrated automobile brake system can be applied to a traditional vehicle as well as a new energy vehicle.

The invention discloses a coordination control method simulating automobile braking and belongs to the technical field of automobile braking control. The method includes the steps that based on the obtained pedal travel, the total braking torque is calculated; based on the obtained flywheel rotating speed, current signal, voltage signal and pedal travel, the total braking torque is distributed, the electronic control hydraulic braking torque and the motor braking torque are obtained; an electronic control hydraulic controller forms braking pressure based on the received electronic control hydraulic braking torque and outputs the braking pressure to a disc brake, and then braking control over a flywheel is conducted; a motor controller forms a target rotation speed signal based on the received motor braking torque and sends the target rotation speed signal to a motor; and the motor carries out braking control over the flywheel based on the received target rotation speed signal. The coordination control method simulating automobile braking can be used for realizing coordination control over an automobile.

A vehicle brake force generation device (11) is provided with an electric motor (13) for applying drive force and regenerative brake force to the wheels (17) of an electric vehicle (V), a brake hydraulic pressure generation device (26) for generating the brake hydraulic pressure to be applied to the calipers (27) of the electric vehicle (V), a slip information computation unit (63) for computing the slip information of the wheels (17), a VSA device (18) for controlling the friction braking of at least the brake hydraulic pressure generation device (26) such that the slipping of the wheels (17) is inhibited, a first diagnosis unit (67) for diagnosing the VSA device (18), and a brake control unit (65) for controlling the cooperative braking which includes controlling the regenerative braking of the electric motor (13) and/or controlling the friction braking of the brake hydraulic pressure generation device (26). The brake control unit (65) continues to control the regenerative braking of the electric motor (13) when a behavior stabilization assistance device (18) goes into an abnormal state while the regenerative braking of the electric motor (13) is being controlled.

The invention relates to a control method of a vehicle magnetorheological fluid braking system based on braking intention identification. The control method of the vehicle magnetorheological fluid braking system based on braking intention identification comprises the following steps that vehicle speed is collected through a vehicle speed sensor; whether vehicle speed at this time is at slow speedor not is judged, if the vehicle speed is at a slow speed state, the braking intention is identified as basic braking; otherwise, values of pedal displacement and pedal speed are taken as input values, and the corresponding braking intention is identified by a fuzzy controller; a target braking torque is obtained according to a target braking torque generation algorithm in a control output unit; and through integral separation PID control, actual braking torque can be output accurately, stably and quickly. The control method of the vehicle magnetorheological fluid braking system based on braking intention identification can accurately, stably and quickly output braking torque while rapidly identifying the braking intention of a driver, braking time can be reduced, efficient braking effectcan be achieved, and loss of life and property is avoided.

The invention discloses a pedal-feeling simulator for a vehicle and the vehicle with the pedal-feeling simulator. The vehicle comprises a pedal, and the pedal-feeling simulator comprises a shell, a linear motor and an elastic part; and the linear motor comprises a motor primary part, a motor secondary part and a motor push rod, the motor primary part is fixed to the inner wall of the shell, the motor secondary part is arranged in the motor primary part, the motor secondary part is matched with the motor primary part so as to enable the motor secondary part to axially move relative to the motorprimary part, the motor secondary part sleeves the motor push rod to drive the motor push rod to move synchronously, the first end of the motor push rod extends out of the shell to be suitable for being connected with the pedal, and the elastic part is used for applying elastic force to the motor push rod. The pedal-feeling simulator for the vehicle is high in response speed, has a good braking effect, and meanwhile can provide a good 'brake feeling', especially a pedal braking feeling, for a driver.

A vehicle brake hydraulic control apparatus includes a reservoir, a hydraulic pressure pump, an orifice, a damper and a one-way valve. The reservoir absorbs an excess brake hydraulic pressure of a wheel brake. The hydraulic pressure pump suctions brake fluid absorbed by the reservoir and returns the suctioned brake fluid to a master cylinder through a return line. The orifice is provided in the return line. The damper is connected to the return line between the orifice and the hydraulic pressure pump and damps discharge pressure pulsation of the hydraulic pressure pump. The one-way valve is provided in the return line between the damper and the orifice and prevents a hydraulic flow from an orifice side to a damper side.

The invention discloses an electric power-assisted brake system with a large transmission ratio. The system comprises a motor, a first transmission pair, a second transmission pair, a third transmission pair and a power coupling mechanism, wherein the motor is connected with the first transmission pair and drives the first transmission pair to work, after the second transmission pair and the thirdtransmission pair are sequentially connected to the first transmission pair, the first transmission pair, the second transmission pair and the third transmission pair are driven by the motor to achieve linkage, and the power coupling mechanism is connected with the third transmission pair. The system has the advantages that the problems that due to the fact that the transmission ratio of an existing electric power-assisted brake system is low, maximum brake force is not large enough, and the current of the motor is excessively large are solved, and an effective solution is provided for intelligentization of a heavy vehicle brake system.

A hybrid pad for a disc brake has first friction members and a second friction member. The first friction members can be positioned at a rotor rotation inlet portion and at a rotor rotation outlet portion of the pad. The second friction member can be positioned at a central portion of the pad. The first friction members include a Young's modulus E1, a friction coefficient mu1 and a sum of the sliding areas A1 of the paired first friction members to come into sliding contact with the disc rotor. The second friction member has a Young's modulus E2, a friction coefficient mu2 and a sliding area A2 to come into sliding contact with the disc rotor. The mu2 is higher than the mu1, the E2 is higher than the E1, and (E2xA2)/(E1xA1) is 0.8 or more and 1.2 or less.