37results about How to "Build pressure quickly" patented technology

The invention aims at providing a two-way-oil-inlet resonance bypass type electronic-control fuel injector comprising a fuel injector head, a fuel injector body, a flow-limiting valve assembly, an electromagnetic valve assembly, a needle valve assembly and a spray nozzle. The flow-limiting valve assembly is located in a pressure storage cavity, and it is ensured that under the condition of the large fuel injection quantity, fuel injection processes of all cylinders are stable. A resonance through hole and a resonance throttling hole are machined in the bottom of the flow-limiting valve assembly, and fluctuation of fuel passing through the flow-limiting valve assembly is reduced according to the wave superposition principle. The electromagnetic valve assembly and the needle valve assembly are arranged on the lower portion. A two-position three-way valve form is adopted for an electromagnetic valve so that the dynamic oil return amount can be decreased. A control slide block is arranged in a control cavity and makes contact with a middle block so as to play a role in decreasing the fuel injection speed at the initial stage of injection and accelerating the needle valve seating response. The two-way-oil-inlet manner is adopted for the control cavity, and therefore the pressure buildup speed is further increased, and the rapid response characteristic of the fuel injector is achieved. No static pressure differences exist in the fuel injector, and the fuel injector is free of static leakage.

The invention relates to a mechanical vacuum booster with an emergency braking function and belongs to the automobile braking field. A control valve assembly of the mechanical vacuum booster comprises such parts as a valve body, an input link, a filter screen spring seat, a conical spring, a spring seat, a compression spring, a vacuum leather cup, a trigger mechanism, a trigger mechanism spring, a plunger, a locking plate, a locking plate spring, a valve block, a scale plate, a reaction plate, an output link, an elastic collar, as well as a rubber seal ring, a rear shell body, a diaphragm, a diaphragm plate, a front shell body, a large return spring and the like. The mechanical vacuum booster has the advantages of novel structure and low cost; and provided that the vacuum booster meets a certain input power requirement, the vacuum booster can output relatively huge applied force on a main braking cylinder when a driver performs emergency braking, and the vacuum booster maintains output pressure of the main cylinder on the condition of reducing input force, thus shortening the braking distance of the whole automobile and being especially effective for unskilled drivers and drivers who hesitate to brake.

The invention discloses an intelligent automobile composite line control braking system and a braking control method thereof. The braking system combines a mechanical electric control braking system with an integrated motor type electric control braking system and is independently controlled by an electronic control unit. An electromechanical braking (EMB) module consists of two brakes. An integrated motor type electric control braking IBS module consists of an integrated motor, a ball screw mechanism and a braking pressure generation unit. The ball screw mechanism is fixedly connected to theinterior of a rotor of the integrated motor, and the rotor transmits power to an output push rod of the braking pressure generation unit through the ball screw mechanism. Two inner cavities of a maincylinder of the braking pressure generation unit generate braking pressure under the push of the output push rod, and braking control over two braking wheel cylinders is achieved through electromagnetic valves. The mechanical electric control braking system is combined with the integrated motor type electric control braking system, the problems of a single braking system are solved to achieve rapid pressure generation and precise pressure control, and braking under multiple conditions can be achieved.

The invention discloses a 48V hybrid electric system. The system comprises a controller unit, a 12V battery, a display module, a 48V battery, a sensor unit, a DC-DC module, a BMS system, a motor controller and a BSG motor, the 48V battery provides electric energy for the BMS system and the BSG motor, the controller unit controls the motor controller to control the BSG motor through the BMS system,and the BMS system is further connected with an electronic supercharger. The controller unit obtains expected torque of an engine according to an electric signal generated by an accelerator pedal sensor, obtains target air inlet pressure of the engine by looking up a table, and obtains a target rotating speed value of the electronic supercharger by calculating a supercharging ratio. The controller unit sends the target rotating speed value to the electronic supercharger through a bus to control the air inlet pressure. The system has the advantages that working conditions of starting, stopping, starting, braking and the like of the engine are optimized, the carried electronic supercharger can rapidly build pressure, the turbine hysteresis phenomenon of a turbocharger is eliminated, and a vehicle system can have better power responsiveness in cooperation with the motor.

The invention discloses a motor direct-driven brake-by-wire system with a main/auxiliary cylinder and a brake control method of the system. The brake system is braked through combination of a double-cavity main cylinder brake module and a single-cavity auxiliary cylinder brake module and relatively independently controlled by an electronic control unit, the double-cavity main cylinder brake modulecomprises a main cylinder integrated motor, a main cylinder ball lead screw mechanism and a main cylinder brake pressure generation unit, two groups of single-cavity auxiliary cylinder brake components are parallelly connected to form the single-cavity auxiliary cylinder brake module, normally open switch solenoid valves, single-cavity auxiliary cylinder pressurizing units and wheel-brake cylinder execution pipelines are serially connected to form the single-cavity auxiliary cylinder brake components, the main cylinder brake pressure generation unit and the single-cavity auxiliary cylinder pressurizing units generate brake pressure through driving of the integrated motor and transmission of the ball lead screw mechanism, and wheel-brake cylinders are braked and controlled by the solenoidvalves. The system solves the problems that when a single motor drives a main cylinder, the building time of the pressure is long, fluctuation is large, accuracy is poor, and the requirements for performances of the motor are high.

The invention discloses a wire control brake system based on time-division serial control and simultaneous parallel control and aims to solve the problems that a traditional brake system vacuum booster is large in size and expensive, and a motor-assisted wire control hydraulic brake system is high in motor requirements, expensive and incapable of guaranteeing precise pressure control. The wire control brake system comprises a wire control brake system body based on the time-division serial control and a wire control brake system body based on the simultaneous parallel control, wherein the wire control brake system body based on the time-division serial control comprises a brake master cylinder output unit (A) with an oil cup, a first hydraulic control unit (B1), an electronic control unit (C) and a wheel brake (D); the wire control brake system body based on the simultaneous parallel control comprises a brake master cylinder output unit (A) with an oil cup, a second hydraulic control unit (B2), an electronic control unit (C) and a wheel brake (D); that is to say, only the first hydraulic control unit (B1) and the second hydraulic control unit (B2) of the two system bodies are different.

The invention aims at providing a double-path oil inlet bypass electric control oil sprayer with carving grooves. The double-path oil inlet bypass electric control oil sprayer comprises an oil sprayer head, an oil sprayer body, a current limiting valve assembly, an electromagnetic valve assembly, a needle valve assembly, a needle valve seat and a spray nozzle, wherein the current limiting valve assembly is positioned inside a pressure accumulation cavity to guarantee the stable oil spraying process of each cylinder under the condition of great oil spraying quantity. The electromagnetic valve assembly and the needle valve assembly are arranged at the lower side. The electromagnetic valve uses a two-position three-way form so as to reduce the dynamic oil return quantity. A control slide block is arranged inside the control cavity, and is in contact with an intermediate block; the effects of decelerating the oil spraying speed at the primary spraying stage and accelerating the needle valve seating response are achieved. An oil inlet throttle hole is formed in the control slide block; the control cavity pressure building is further accelerated. The carving grooves in the micrometer levels are formed in the surface of the spray needle valve body; the stability of the cavitation flowing can be effectively improved; the cavitation erosion degree of the oil sprayer is reduced. A control plunger piston structure of the oil sprayer is omitted, so that no static pressure difference exists at the inside of the oil sprayer; the characteristic of no static leakage of the oil sprayer is ensured.

The invention relates to a low-speed machine integral common rail so as to reduce pressure fluctuation in a common rail pipe. According to the scheme, the common rail pipe, an oil inlet end cover andan end cover are included. The common rail pipe is provided with an oil inlet oil way and an oil return oil way which penetrate through the two ends. The oil inlet end cover is fixedly arranged at oneend of the common rail pipe and provided with an oil inlet communicating with the oil inlet oil way. The end cover is fixedly arranged at the other end of the common rail pipe and provided with an oil outlet communicating with the oil inlet oil way, and a circulation valve is fixed to the end cover. A pressure limiting valve and at least two flow limiting valves are fixed to the common rail pipeand communicate with the oil inlet oil way and the oil return oil way, and the flow limiting valves are each used for being connected with one electric control oil atomizer.

The invention provides an electromagnetic pilot pneumatic control valve for opening and closing double-active control, and solves the problem of difficult meeting of quick closing deceleration requirements of an engine caused by slower closing response due to influence on a traditional engine control valve by gradual reduction of the exhaust speed and the spring loading force. The electromagneticpilot pneumatic control valve comprises a main valve, an opening secondary valve and a closing secondary valve; the main valve comprises a main valve body, a main valve element and a main valve spring; the main valve element is arranged in the main valve body to form two independent air cavities in the main valve body: an opening air cavity and a closing air cavity; the main valve spring is arranged in the closing air cavity; the main valve body is provided with a medium inlet and a medium outlet; the opening secondary valve and the closing secondary valve are both electromagnetic valves; theopening secondary valve is used for controlling inflation and deflation of the opening air cavity and providing opening force to the main valve element; and the closing secondary valve is used for controlling inflation and deflation of the closing air cavity and providing closing force to the main valve element.

The invention aims to provide an electric control oil injector with dual-channel oil supply. The electric control oil injector comprises an oil injector head, an oil injector body, a flow limiting valve component, an electromagnetic valve component, a nozzle and a needle valve body, wherein a pressure storage cavity is formed in the oil injector body, is communicated with a main oil supply hole and the flow limiting valve component, and is capable of ensuring stability of oil injection process of each cylinder under the condition of high oil injection quantity; the flow limiting valve component is arranged under the pressure storage cavity and is capable of preventing continuous abnormal oil injection; the electromagnetic valve component is processed at the bottom of the oil injector body; a valve rod is driven to move due to electromagnetic force, so that the flexible oil injection strategy and the oil injection process with quick response and high control accuracy can be achieved; the electromagnetic valve adopts a two-position three-way valve; through dual-channel oil supply in the oil injector, the dynamic oil return quantity is not increased while ensuring that the pressure buildup speed of a control cavity is accelerated and the needle valve seating response is improved; the static pressure difference is not generated in the oil injector; and the characteristic of no static leakage of the oil injector can be ensured.

The invention aims at providing a double-channel oil feeding type electronic control oil injector with carved grooves. The electronic control oil injector comprises an oil injector head, an oil injector body, a flow-limiting valve assembly, a solenoid valve assembly, a needle valve seat, a needle valve body and a nozzle. A pressure storage cavity is formed in the oil injector body and communicates with a main oil feed hole and the flow-limiting valve assembly, and stability of the oil injection process of all cylinders under a large oil-injection quantity condition is guaranteed. The solenoid valve assembly is machined at the bottom of the oil injector body, a valve rod is driven by electromagnetic force to move, and a flexible oil injection strategy and the oil injection process which is quick in response and high in control precision can be achieved. A two-position three-way valve mode is adopted by a solenoid valve, and by means of double-channel oil feeding inside the oil injector, it is guaranteed that the pressure buildup speed of a control cavity is increased, seat reaching response of a needle valve is increased, and meanwhile dynamic oil return quantity is not increased. The carved grooves with micron-grade depths are formed in the surface of the needle valve body, stability of cavitation flow can be effectively improved, and the cavitation degree of the oil injector is reduced. A static pressure difference does not exist in the oil injector, and it is guaranteed that the oil injector has the advantage of being free of static leakage.

The invention aims at providing a bypass type electronic fuel injector which comprises a fuel injector head, a fuel injector body, a flow limiting valve assembly, a solenoid valve assembly, a cap nut, a needle valve assembly, a nozzle and other components. A pressure storage cavity is formed in the fuel injector body and communicates with a main fuel inlet and the flow limiting valve assembly, and it can be guaranteed that during large-pulse-width fuel injection, the fuel injection processes of all cylinders are stable. The flow limiting valve assembly is mounted below the pressure storage cavity, and abnormal continuous fuel injection is avoided. The solenoid valve assembly and the needle valve assembly are sequentially arranged below the flow limiting valve assembly and connected together through the cap nut. A control sliding block is arranged in a control cavity and is in contact with a middle block, and the functions of relieving the fuel injection speed in the initial injection period and accelerating needle valve sitting responses are achieved. Hydraulic pressure in the nozzle part is balanced, the static pressure difference is avoided, and the function that the fuel injector is free of static leakage is achieved.

The invention aims to provide a double-way oil inflow resonance pore plate type electrically-controlled oil injector. The oil injector comprises an oil injector head, an oil injector body, a flow limiting valve assembly, an electromagnetic valve assembly and a needle valve assembly. A pressure storage cavity is formed in the oil injector body and communicates with a main oil inlet hole and the flow limiting valve assembly, and the stability of the oil injecting process of each cylinder under the condition of large oil injection quantity is guaranteed. The flow limiting valve assembly is placed below the pressure storage cavity, so that the abnormal oil injection is prevented from being continuously carried out. A resonance structure machined at bottom of flow limiting assembly reduces water hammer pressure waves generated by rapid starting and stopping of the oil injector. Through double-way oil inflow from a balance valve rod of a solenoid valve and the inside of a middle block and double-way oil inflow from a pore plate throttling hole and an annular side surface oil way, the pressure building process of a control cavity is accelerated, and the response speed of needle valve seating is increased. Through a pore plate structure arranged in the control cavity, the dynamic oil return amount in the oil injecting process is greatly reduced, and the characteristic of micro-dynamic oil return is guaranteed.