53results about How to "Short build-up time" patented technology

The invention discloses a propelling agent supply system for a catalytic ignition hydrogen oxygen small-sized rocket thruster test. The propelling agent supply system comprises an air bottle assembly, a flow controller, a solenoid valve, a check valve, a pressure gauge and a connecting device. A fuel hydrogen (H2) pipeline system consists of a test pipeline and an emptying pipeline, wherein the emptying pipeline is used for coarsely adjusting H2 flow and pressure required by the upstream of a catalytic ignition hydrogen oxygen small thrust engine before the test starts, so that the time of coarsely adjusting H2 flow and pressure intensity and the time of H2 passing through the pipeline in the test process can be shortened by the emptying pipeline to the maximum degree.

The invention provides a vertical pressure charging pressing system capable of enhancing pressing property, stability and safety of a die casting machine by using a structure with a pressure charging oil cylinder perpendicular to an injection oil cylinder. The slow-press hydraulic oil and the quick-press hydraulic oil enter the rear cavity of an injection oil cylinder through a large-through-diameter solo valve. The pressure charging oil cylinder is perpendicular to the injection oil cylinder, disposed at the upper or lower part and between the solo valve and the injection plug. Two pressure charting starting modes are provided, one depends on pressure feedback of the injection oil cylinder rear cavity, and the other depends on displacement feedback of the injection oil cylinder. When the PLC or the process control machine receives the feedback signal, the pressure charging valve opens, the pressure charging oil cylinder starts to work, the pressure in the rear cavity of the injection oil cylinder increases quickly, the solo valve closes at the same time, and the pressure charging function is completed. The invented system is provided with following advantages: quick injection, the pressure charging channel is large and shot, quick injection speed, short pressure build-up time, long pressure charging distance, and high energy charging type.

An efficient pressure buildup device for a die casting machine comprises a boost oil cylinder and an injection oil cylinder, and is characterized in that an oil way comprises a fourth cartridge valve and a fourth electromagnetic directional valve which are mutually connected in series, a first cartridge valve and a first electromagnetic directional valve which are mutually connected in series, a third cartridge valve and a third electromagnetic directional valve which are mutually connected in series, a sixth cartridge valve and a sixth electromagnetic directional valve which are mutually connected in series, a fifth cartridge valve and a throttling screw which are mutually connected, a first energy accumulator, a first pressure reducing valve and a first one-way valve which are mutually connected in series, an overflow valve and a fifth electromagnetic directional valve which are mutually connected, as well as a second energy accumulator, a second pressure reducing valve and a second one-way valve which are mutually connected in series. According to the structure, power is gained while electromagnets are boosted during rapidly acting, signal receiving and action command transmitting time of a PLC (programmable logic controller) is saved, and only two processes including opening of cartridge valve cores and pushing-out of the boost oil cylinder are reserved, so that the pressure buildup time is shortened. The efficient pressure buildup device for the die casting machine has the characteristics of simple and reasonable structure, short pressure buildup time and low cost.

The invention discloses a vehicle line control hydraulic brake system hardware-in-the-loop test bed in order to solve the problem that with respect to an existing test bed, the detection precision is poor, the rapid pressure-buildup speed is too low and the steady-state error is too large. The vehicle line control hydraulic brake system hardware-in-the-loop test bed comprises a real-time platform and a line control hydraulic brake system, the real-time platform comprises a host computer and a data acquisition and exploitation system, and the host computer is in bus connection with the data acquisition and exploitation system; and the line control hydraulic brake system comprises a test sensing system, an experiment table basal body and a brake system execution mechanism. The experiment table basal body is installed on the foundation through a support platform, a left front-wheel brake, a right front-wheel brake, a left rear-wheel brake and a right rear-wheel brake of the experiment table basal body are installed on the support platform, and the test sensing system is connected with the four wheel brakes through brake hard tubes; the test sensing system is connected with the data acquisition and exploitation system through a wire; and the brake system execution mechanism is connected with the test sensing system through a brake hard tube, and the brake system execution mechanism is connected with the data acquisition and exploitation system through a wire.

The invention relates to a one-way valve injection device for a die casting machine, which comprises an injection cylinder, an injection piston, a pressurizing piston and a pressurizing valve plate, wherein the injection piston, the pressurizing piston and the pressurizing valve plate are arranged in the injection cylinder; the pressurizing valve plate is provided with a first valve hole and a second valve hole, the pressurizing piston is arranged in the first valve hole and is matched with the first valve hole in a dynamic sealing manner, the injection cylinder is connected with the first valve hole of the pressurizing valve plate in a sealing manner, a one-way valve is arranged between the injection piston and the pressurizing piston, one end of the one-way valve is arranged in the injection cylinder and is matched with the injection cylinder in a dynamic sealing manner, the other end of the one-way valve is fixedly connected with the pressurizing piston, and the second valve hole is communicated with an oil inlet of the one-way valve. Compared with a floating piston, the one-way valve injection device operates stably and reliably; the problem of instable speed when advanced pressurizing and stroke control pressurizing under a pressure control condition can be solved; and stroke or time control can be realized and pressing time is shortened through pressurization, thus the one-way valve injection device can adapt to the requirement for the traditional high-end die casting within larger range.

The invention provides an electric drive hydraulic device for an automobile braking system. The electric drive hydraulic device for the automobile braking system comprises a motor, a pressure cylinderand an oil pressure accumulator, wherein an accumulator electromagnetic valve is arranged at an outlet of the oil pressure accumulator; the oil pressure accumulator is controlled to supply oil to thebraking system through the accumulator electromagnetic valve; the motor is connected with the pressure cylinder through a transmission mechanism; an outlet of the pressure cylinder is connected witha pressure cylinder electromagnetic valve; the pressure cylinder is controlled to supply liquid by the pressure cylinder electromagnetic valve; and the motor drives the pressure cylinder to output hydraulic pressure to charge the accumulator. Through the control of two pressure output sources of the oil pressure accumulator and the motor-driven pressure cylinder, the voltage buildup time during emergency braking is shortened. The ABS action on the low-attachment road surface can consume the oil of the pressure cylinder, and the ABS function of the electric control braking system can be interrupted when the pressure cylinder is refilled. However, the intervention of the oil pressure accumulator can realize that the function can be interrupted during the ABS action on the low-attachment roadsurface, so that the safety during driving is ensured.

The invention relates to the technical field of an autonomous braking system, and concretely provides a time-sharing autonomous braking system with a failure labor backup function and a baking method.The time-sharing autonomous braking system comprises a power supply (9) and a braking controller (10) and also comprises a first electric cylinder (8a), a second electric cylinder (8b) and a labor cylinder; the first electric cylinder (8a) and the second electric cylinder (8b) are electrically connected with the braking controller; the labor cylinder is electrically connected with the first electric cylinder (8a) and the second electric cylinder (8b); the first electric cylinder (8a) and the second electric cylinder (8b) are respectively connected to two wheel brakes arranged on an automobileto form two braking loops; an electromagnetic valve is arranged between each wheel brake and the corresponding electric cylinder. The braking method provided by the invention comprises an autonomousbraking mode, a failure labor backup braking mode and a failure protection braking mode. The time-sharing autonomous braking system has the advantages that the structure is simple; the cost is low; the braking response is fast; the reliability is high; the failure protection capability is high; the braking control and the ABS function of single wheels can be realized.

The invention provides a distributed braking system with manpower failure backup and a pressure adjusting control method therefore, and belongs to the technical field of automobile braking systems. The distributed braking system specifically comprises a brake pedal, a human cylinder, a brake controller and a power supply, and further comprises at least three electric cylinders and solenoid valveswhich are electrically connected with the brake controller, wherein the electric cylinders are connected with a liquid discharge hole of the human cylinder through a brake pipeline, the electric cylinders are connected to the same number of wheel brakes on an automobile in a one-to-one correspondence mode, and each electric cylinder and the corresponding one wheel brake form a braking circuit; thetwo wheel brakes at the two ends of the same shaft communicates through the brake pipeline, the brake pipeline is provided with the solenoid valves, and the solenoid valves are electrically connectedwith the brake controller. The distributed braking system has the dual functions of manpower failure backup and shaft pressure equalization function, so that the intelligent driving automobile is good in motion stability and high in reliability during braking.

The invention provides a distributed braking system with failure backing-up and a brake pressure vector control method for the distributed braking system with failure backing-up and belongs to the technical field of automobile braking systems. The distributed braking system comprises a braking pedal, a manpower cylinder, a braking controller and a power supply as well as at least three electric cylinders and at least three electromagnetic valves which are electrically connected to the braking controller, wherein each of the electric cylinders is connected to a liquid discharge hole of the manpower cylinder via a braking pipeline respectively; the electric cylinders are in one-to-one corresponding connection to wheel brakes, of the same quantity, on an automobile, and each of the electric cylinders forms a braking loop with the corresponding wheel brake; and the two wheel brakes on two ends of a same shaft communicate via a braking pipeline, one of the electronic valves is disposed on the braking pipeline, and the electromagnetic valve is electrically connected to the braking controller. The distributed braking system provided by the invention has double functions including manpowerfailure backing-up and shaft pressure balancing, so the automobile under intelligent driving can travel stably with high reliability during braking.

The invention relates to an electro-hydraulic brake-by-wire device with a redundancy function and a control method. The device comprises a brake disc, calipers, a power take-off gear, a gear shaft, alead screw, a return spring, a piston nut, a sealing ring, a high-pressure oil cylinder shell, an electromagnetic clutch, a fixed seat, a hydraulic control unit, a split liquid storage tank, an energyaccumulator, a liquid storage tank, an angle sensor, a brake pedal, a brake push rod assembly, a brake master cylinder, a controller, a left friction plate and a right friction plate. Vehicle kineticenergy can be fully utilized as a power source, a driving motor is omitted, and the cost is effectively reduced. A gear power take-off mechanism is adopted to drive a high-pressure oil cylinder to generate high-pressure brake oil, and whether the high-pressure oil cylinder works or not is controlled through the electromagnetic clutch. The high-pressure oil cylinder is integrated on the brake oilcylinder, so that a brake pipeline is effectively shortened, brake pressure fluctuation caused by elastic deformation of the brake pipeline is reduced, and the brake response speed and the control precision are improved. The device has the advantages of high integration level, high response speed and low cost.

The invention discloses an on and off control method of a travelling power generation system. The travelling power generation system comprises an engine, an alternating current power generator, a direct current power generator, a power generation controller and a power increase module, wherein the power generation controller comprises a power generator control module and an inversion module; the engine is connected with the alternating current power generator and the direct current power generator respectively to drive the alternating current power generator and the direct current power generator to rotate; the power generator control module is connected with the alternating current power generator to control the alternating current power generator to operate and output electric energy; aninput end of the power increase module is connected with the direct current power generator and a storage battery respectively; an output end of the power increase module is connected in parallel with an output end of the power generator control module to form a common bus as an input of the inversion module; and the power generation controller is in communication connection with the power increase module by a CAN bus. A power takeoff generation system performs uniform control on the power generation controller and the power increase module; and the power generation controller and the power increase module are hot standby each other.

The invention belongs to the field of automobile unmanned driving, and particularly relates to an unmanned vehicle braking system which comprises a service braking system and a parking braking system EPB. The service braking system comprises a hydraulic braking system and an electromagnetic braking system. The hydraulic braking system comprises a brake-by-wire power assisting system, a vehicle body stabilizing system ESC and a hydraulic brake actuator integrated in a hub motor. The brake-by-wire power assisting system comprises a brake fluid storage pot, a main cylinder, a push rod, a brake control system ECU and a brushless motor. The brake control system ECU controls the brushless motor to work to drive the push rod to work, and the push rod pushes the main cylinder to form required oil pressure, so that the whole vehicle hydraulic brake system is pushed to work. Electro-hydraulic coupling braking is achieved, electromagnetic braking of the motor is utilized to the maximum degree to meet the whole vehicle braking requirement, the vehicle body posture and the wheel cylinder pressure can be adjusted through the vehicle body stabilizing system ESC, and the safety and stability of vehicle running are improved.

The invention discloses a press-shoot pressurization system and also discloses a die-casting machine provided with the press-shoot pressurization system. The press-shoot pressurization system comprises a cylinder block, a press-shoot piston, a pressurization piston and a press-shoot switch, wherein a guiding hole is formed in the cylinder block; one end of the press-shoot piston is arranged in thecylinder block; a press-shoot cavity is formed between one end of the press-shoot piston and the pressurization piston in the cylinder block; a pressurization cavity is formed between the pressurization piston and the cylinder block; oil enters the press-shoot cavity and the pressurization cavity through a first oil inlet and a second oil inlet separately; the press-shoot switch is arranged on the inner side wall of the guiding hole and the pressurization piston, and the two ends of the press-shoot switch communicate with the press-shoot cavity and the first oil inlet separately; the pressurization piston slides in the guiding hole to turn off the press-shoot switch; and the press-shoot cavity forms a hermetic high-pressure resistant cavity to continuously push the pressurization piston,the press-shoot cavity raises to the set high pressure value immediately, and the process can shorten the pressure building time and improve the pressure building stability. The die-casting machine provided with the press-shoot pressurization system can improve the pressure casting effect and the product quality.

The invention relates to the technical field of vehicle braking control systems or components thereof, in particular to a distributed braking system with multiple working modes and a parking function.The distributed braking system comprises a braking pedal, a manpower cylinder, a braking controller and a power supply, and further comprises at least three electric cylinders electrically connectedwith the braking controller; the electric cylinders are correspondingly connected to wheel brakes with the same number on a vehicle one to one; each electric cylinder and the corresponding wheel brakeform a braking loop; and each electric cylinder comprises a shell, a motor connected with the shell, a cylinder body, and a piston part slidingly arranged in the cylinder body. The distributed braking system is characterized by further comprising a disc part and a connecting rod; one end of the connecting rod is hinged with the piston part; and the other end of the connecting rod is eccentricallyand rotationally connected with the disc part. The distributed braking system has such advantages as compact structure, fast braking response, capability of realizing the parking function, reliable failure protection capacity and low manufacturing cost, and is high in vehicle braking reliability.

The present disclosure provides a system for supplying a urea solution, comprising a storage tank, an injection module, and a urea pump, the urea pump comprising: a housing; the first liquid conveying pipeline and the second liquid conveying pipeline are arranged in the shell, the first liquid conveying pipeline is connected with the liquid inlet pipeline, and the second liquid conveying pipeline is connected with the liquid outlet pipeline; the pump core module is configured to be connected with the first liquid conveying pipeline and the second liquid conveying pipeline; the backflow structure is arranged in the shell and comprises a backflow pipeline and a one-way backflow valve arranged in the backflow pipeline, the inlet end of the backflow pipeline is connected to the second liquid conveying pipeline, and the outlet end of the backflow pipeline is connected to the first liquid conveying pipeline. Therefore, pipelines and pipeline heaters can be saved, and the liquid feeding efficiency of the urea pump can be improved.

The invention relates to the technical field of vehicle brake control systems, and particularly provides a distributed type autonomous braking system with a parking function and a control method. Thesystem comprises a power supply, a brake controller and wheel brakes, and further comprises at least three electric cylinders which are connected with the wheel brakes and form brake loops; each electric cylinder comprises an electric cylinder body, a piston arranged in the electric cylinder body in a sliding manner, a motor for driving the piston to slide by a screw pair arranged in the electriccylinder body and a liquid storage pot connected with the electric cylinder body; the motors are electrically connected with the brake controller; each screw pair comprises a nut driven by the corresponding motor and a screw connected with the corresponding piston; and the electric cylinders are connected to the wheel brakes with the same number on an automobile in a one-to-one correspondence manner, and each electric cylinder and the corresponding wheel brake form one brake loop. Compared with the prior art, the system has a failure protection function, higher safety performance, the parkingfunction, simple structure and lower cost.

The invention discloses a rapid press-shooting cut-off mechanism for a magnesium alloy cold chamber die casting machine. The rapid press-shooting cut-off mechanism comprises a first solenoid directional valve, a first inserting valve, a second inserting valve and a stop valve, wherein a hole P, a hole A and a hole B of the first solenoid directional valve are respectively corresponding connected with an energy accumulator, a control hole C of the first inserting valve and the control hole C of the second inserting valve; a hole B of the first inserting valve is connected with the energy accumulator; the hole A of the second inserting valve is connected with an oil tank; the hole A of the first inserting valve is connected with the hole B of the second inserting valve and is connected with a port X of the stop valve; and the port X is used for controlling the stop valve to switch on and off. The rapid press-shooting cut-off mechanism is reasonably designed and is capable of realizing the functions of external controlled one-way flow and bidirectional cut-off, shortening the decompression time and promoting the stability of rapid press-shooting cut-off.