Abstract: The present disclosure discloses a sintered neodymium-iron-boron magnet and a preparation method thereof. The sintered neodymium-iron-boron magnet includes the following raw materials in mass percentage: 1%-40% of an iron powder or a steel powder with a magnetic induction intensity of more than 1.2 T, not more than 10% of a praseodymium-neodymium metal hydride powder, and a remainder of a neodymium-iron-boron fine powder, wherein the mass percentages of the above raw materials add up to 100%. The preparation method includes: weighing the raw materials in mass percentage; mixing the weighed raw materials uniformly, and then subjecting to magnetic-field press molding, isostatic pressing, sintering and tempering to obtain the sintered neodymium-iron-boron magnet.

Abstract: An automobile electronic parking execution controller with a double-MCU redundancy design comprises a parking switch circuit, a biaxial acceleration sensor unit, a main micro control unit (MCU) U2 and a monitoring MCU U1, wherein the main MCU U2 controls a parking motor by means of detecting signals of the parking switch circuit and the biaxial acceleration sensor, the monitoring MCU U1 monitors a running state of a whole control system and restores the main MCU U2 when the main MCU U2 is abnormal, and the main MCU U2 restores the monitoring MCU U1 when the monitoring MCU U1 is abnormal. After the main MCU U2 crashes, the main MCU U2 can still be quickly stored through the monitoring MCU U1, so that the main MCU U2 quickly enters a response state to recover the parking brake control ability, which improves the safety of the system.

Abstract: A test method of wheel speed simulation and acquisition equipment for an EPB rear wheel anti-lock brake test is provided. The equipment includes a master computer, wheel simulation sets and an EPB system with a wheel anti-lock brake function, where the master computer includes a motor rotating speed control module, an EPB-required signal simulation module and a target wheel speed calculation module; the wheel simulation sets include motor drivers, motors, gears and wheel speed sensors; outputs of the wheel speed sensors are connected into the EPB system; the motor rotating speed control module is connected with the motor drivers; the EPB system to be tested includes EPB calipers, pressure sensors are arranged in the EPB calipers; the target wheel speed calculation module calculates a target wheel speed and sends the target wheel speed to the motor rotating speed control module to complete the control of an actual wheel speed.

Abstract: A bypass energy storage device for an electronically controlled hydraulic braking system includes a brake master cylinder, a first pipeline, and a second pipeline. The first pipeline is connected with a first branch. One end of the first branch is communicated to an energy accumulator, and the first branch is connected with a first inlet valve. The second pipeline is connected with a second branch. One end of the second branch is communicated to the energy accumulator, and the second branch is connected with a second inlet valve. The energy accumulator is communicated with a third branch, and one end of the third branch is communicated to a second pipeline. The effects of reducing energy consumption, better controlling foot feeling and thus improving the comfort and safety of products are achieved.

Abstract: An electro-hydraulic braking system includes a main casing. A hydraulic unit brake master cylinder is provided in the main casing. An outer end of a piston rod of the brake master cylinder is connected to an output top rod. Another end of the output top rod is provided with an input rod. The input rod is slidably connected in the main casing along only a length direction of the input rod, and another end of the input rod is provided with a push rod that is configured to transmit a brake pedal force. The main casing is further provided therein with a reset member configured to push the push rod away from the brake master cylinder to reset and a displacement sensor configured to sense a displacement of the push rod. The input rod and the output top rod include a spacing state and an abutment state.

Abstract: The present disclosure discloses a sintered neodymium-iron-boron magnet and a preparation method thereof. The sintered neodymium-iron-boron magnet includes the following raw materials in mass percentage: 1%-40% of an iron powder or a steel powder with a magnetic induction intensity of more than 1.2 T, not more than 10% of a praseodymium-neodymium metal hydride powder, and a remainder of a neodymium-iron-boron fine powder, wherein the mass percentages of the above raw materials add up to 100%. The preparation method includes: weighing the raw materials in mass percentage; mixing the weighed raw materials uniformly, and then subjecting to magnetic-field press molding, isostatic pressing, sintering and tempering to obtain the sintered neodymium-iron-boron magnet.

Abstract: An electro-hydraulic braking system includes a main casing. A hydraulic unit brake master cylinder is provided in the main casing. An outer end of a piston rod of the brake master cylinder is connected to an output top rod. Another end of the output top rod is provided with an input rod. The input rod is slidably connected in the main casing along only a length direction of the input rod, and another end of the input rod is provided with a push rod that is configured to transmit a brake pedal force. The main casing is further provided therein with a reset member configured to push the push rod away from the brake master cylinder to reset and a displacement sensor configured to sense a displacement of the push rod. The input rod and the output top rod include a spacing state and an abutment state.

Abstract: The invention relates to a catalytic cracking process for reducing sulfur content in gasoline and the device thereof, which includes a fluidized bed reactor in addition of a heavy oil catalytic cracking riser, characterized in enhancing contact time of oil-gas with the catalyst, further desulfurizing and reducing olefin content and increasing octane number in gasoline; regenerating all recycling catalysts, quality of products being stable and easily operated, reducing sulfur of gasoline to a maximum limit; adding a cooling device so as to avoid coking when the catalyst contacts with oil-gas in high temperature and decrease of yield of light oil resulted by excessively high reaction temperature of gasoline upgrading, improving products distribution, being flexible to change catalyst-oil ratio and reaction temperature of catalytic cracking reaction.

Abstract: An electronic parking brake system and assistant starting method thereof for a motor vehicle are provided, wherein, the electronic parking brake system receives a plurality of sensor signals indicative of vehicle condition and releases the electronic parking brake when any one of the plurality of sensor signals indicates a predetermined condition to assist the driver, the conditions including a relation between a torque transmitted by a clutch and a torque needed for starting the motor vehicle, an engine rotational speed being greater than an engine idle speed and simultaneous depression of the accelerator and clutch pedals, a starting trend, a detected engine rotational speed lower than a threshold value calculated according to a throttle opening data, and a detected rotational speed or angle of driving wheel greater than a predetermined threshold value, thereby providing a method and system adapted to accurately judge whether the brake can be automatically released.

Abstract: An electronic parking brake system and assistant starting method thereof for a motor vehicle are provided, wherein, the electronic parking brake system receives all sensor signals and detection signals of the motor vehicle; when any one of the following conditions is satisfied, the brake will be released to assist the driver in starting: condition (1): a torque Tc transmitted by a clutch is calculated, and the calculated torque Tc transmitted by the clutch is greater than a torque needed for starting the motor vehicle; condition (2): an engine rotate speed is greater than an engine idle speed, and an accelerator pedal and a clutch pedal are depressed simultaneously; condition (3): starting trend of the motor vehicle is detected; condition (4): the detected engine rotate speed is lower than a first predetermined threshold value calculated according to a throttle opening data; condition (5): a detected rotate speed or angle of driving wheel is greater than a predetermined threshold value of rotate speed or angl

Abstract: The invention relates to a catalytic cracking process for reducing sulfur content in gasoline and the device thereof, which includes a fluidized bed reactor in addition of a heavy oil catalytic cracking riser, characterized in enhancing contact time of oil-gas with the catalyst, further desulfurizing and reducing olefin content and increasing octane number in gasoline; regenerating all recycling catalysts, quality of products being stable and easily operated, reducing sulfur of gasoline to a maximum limit; adding a cooling device so as to avoid coking when the catalyst contacts with oil-gas in high temperature and decrease of yield of light oil resulted by excessively high reaction temperature of gasoline upgrading, improving products distribution, being flexible to change catalyst-oil ratio and reaction temperature of catalytic cracking reaction.