50 results about "Common rail" patented technology

This utility model relates to a common rail injector with replaceable control valves, including a solenoid valve assembly, a metering block assembly, a needle valve assembly, and a locking cap. The solenoid valve assembly includes an injector body, an electromagnet, an armature, a control valve core, a first spring, and a valve ball, with the valve ball detachably mounted on the lower end of the control valve core. The metering block assembly includes a metering block and a ball valve seat, with the ball valve seat detachably fixed in a mounting groove. The needle valve assembly includes a needle valve body, a needle valve core, a control chamber sleeve, and a second spring. The injector body, metering block, and needle valve body are arranged sequentially from top to bottom and detachably fixed together by the locking cap. This utility model is easy to maintain and adjust, and can better meet the usage requirements of marine electronically controlled common rail fuel systems.

This invention relates to a method for calculating the dynamic wear of a plunger pair in a marine common rail jet pump. First, a dynamic model is established to solve for the forces and micro-motions (eccentricity and tilt angle) of the plunger. Then, based on e and , the oil film thickness and pressure are calculated, and the oil film bearing capacity and lateral load are balanced through iteration. Next, surface roughness is introduced to determine the lubrication state, and the Reynolds equation is modified to characterize mixed lubrication. Force balance iteration is performed again to obtain a more accurate oil film pressure and thickness distribution. Finally, based on the results of the modified model, the wear amount is calculated using the micro-protrusion contact theory and the Arcard wear formula. This method, by coupling plunger micro-motion, oil film state, surface morphology, and operating parameters, realizes the calculation of dynamic wear, improves the operating condition adaptability of wear assessment, and provides a certain basis for the condition monitoring and life assessment of the plunger pair.

This invention provides a test method for determining injection fusion in multiple injections of a high-pressure common rail system, comprising the following steps: S1. Constructing a high-pressure common rail system injection pattern test system to test the injection pattern of two injections: pre-injection + main injection; S2. Constructing a high-speed photography direct-view test system for the injection process of the high-pressure common rail system to test the spray development characteristics under injection intervals; S3. Processing the images of the spray development process of multiple injections of the high-pressure common rail system, and repeating the spray development characteristic test until the fuel sprays of the two injections merge. The test method for determining injection fusion in multiple injections of a high-pressure common rail system described in this invention employs a spray visualization test method, obtaining the actual development process of real fuel spray in the cylinder, which can accurately determine whether actual fuel spray fusion has occurred in the cylinder, solving the problem of misjudgment of injection fusion based on control signals and injection pattern curves.

This invention discloses an integrated gas distribution device and method for a dual-fuel engine gas injection system in the field of dual-fuel engine technology. The device includes a common rail system, a pressure replenishment component, and a pulse pressure replenishment mechanism. The common rail system includes a common rail pipe and multiple injection valve supply pipes equipped with pressure sensors installed on the common rail pipe. This invention integrates electromagnetic valves capable of high-frequency pressure replenishment into the common rail system. Each electromagnetic valve alternately replenishes pressure to the injection valve supply pipes in a pulse manner, effectively reducing pressure loss in the injection valve supply pipes caused by the length of the common rail pipe and flow diversion. This significantly improves the stability and uniformity of gas injection, which is beneficial for stable engine operation and extends engine lifespan.

This utility model relates to the field of cam divider technology and proposes a noise-reducing cam divider, including a cam divider, a buffer mechanism, and a lubrication mechanism. The cam divider consists of a housing, cam rollers, a common rail cam, and an indexing plate. The buffer mechanism is located at the bottom of the cam divider to buffer the vibrations generated during operation. The lubrication mechanism is located on one side of the housing to add lubricating oil between the cam rollers and the common rail cam. During the operation of the cam divider, vibrations caused by itself and external factors generate noise. The vibration force is transmitted through multiple springs and dampers via hinged support rods one and two, which are respectively connected between the fixed plate and the mounting plate. The combined effect of these springs and dampers effectively buffers and cancels the vibration force, thereby stabilizing the operation of the cam divider and controlling vibration and noise to a very small and smooth level.

An injector and rail assembly for a common rail fuel injection system. The fuel injector 22 comprises an injector body with a ring flange and an injector head end 22. The ring flange 48 has a ring ele

This invention relates to a high-pressure common rail system for a test bench for measuring injection volume of an injection valve, belonging to the field of power machinery technology. It includes an injection volume measurement module, a fuel storage and pumping circulation module, a high-pressure common rail module, a servo oil storage and pumping module, and a servo oil cooling module. The injection volume measurement module includes a test bench, a fuel injector, a booster piston, and a two-position three-way valve. The low-pressure chamber of the booster piston and the test bench are connected to the fuel storage and pumping circulation module. The two-position three-way valve is also connected to a third servo oil tank and the high-pressure common rail module. The high-pressure common rail module includes a high-pressure common rail connected to the two-position three-way valve. One end of the high-pressure common rail is connected to the servo oil storage and pumping module, and the other end is connected to two servo oil tanks. This invention can adjust the high-pressure servo oil consumption to make the test bench conditions closer to the machine environment, extend the servo oil usage time, delay servo oil deterioration, and reduce contaminants in the test system.

This invention discloses a common rail storage device for ammonia-hydrogen mixture suitable for ammonia decomposition hydrogen production systems, relating to the field of new energy engine technology. The device comprises four main units: online ammonia catalytic cracking, pressurized mixing and buffering, intelligent sensing and central control, and mixed fuel output and application, forming a closed-loop control system. Liquid ammonia, after vaporization, enters the catalytic cracking reactor for partial decomposition, generating a hydrogen-ammonia mixture. This mixture is then pressurized and stored in the mixed fuel output and storage device. The intelligent sensing unit monitors the mixed gas parameters in real time, and the central control unit dynamically adjusts the cracking temperature, pressurization pressure, and output pressure to maintain the optimal ratio of 90% NH3 + 10% H2. The mixed gas is stored under high exhaust temperature conditions and released under low exhaust temperature conditions, ensuring stable engine operation under all operating conditions. This device solves the problems of low ammonia decomposition efficiency and unstable mixed gas supply under low exhaust temperature conditions in existing technologies. It has advantages such as high safety, high energy efficiency, and strong adaptability, and can be widely applied to online hydrogen production systems for ammonia fuel engines.

The utility model discloses a V type 14 cylinder high pressure common rail engine, including cylinder body, fuel system and fuel injector, wherein, the cylinder hole is symmetrically seted up in the both sides of cylinder body, and the cylinder hole is along the length direction distribution of cylinder body in each side, and the cylinder hole is 7 in each side, wherein, fuel system includes the high pressure oil pump who links with fuel tank intercommunication, and a plurality of common rail pipes who are communicated with high pressure oil pump and mutually series connection, the utility model discloses through setting 7 cylinder holes in the both sides of cylinder body symmetry each, makes the whole engine to present 14 cylinder's form, fills up the vacancy of market 14 cylinder engine, satisfies the requirement of specific power design, avoids the situation of engine power deficiency or margin.

The application aims to provide a superheat control type ammonia fuel supply system based on fuel activity design, belonging to the field of fuel supply, comprising a liquid ammonia common rail type supply system, a diesel common rail type supply system, a fuel injection device, a superheat control unit and other components of an engine. Hydroxyl-rich gas is used as a combustion-supporting agent instead of pure hydrogen fuel. The safety of the system is ensured, the dynamic thermal management characteristics during engine operation are fully considered, ammonia fuel superheat control is performed, and the direct control form of the sleeve type valve rod strong magnetic force electromagnetic actuator is adopted for the ammonia fuel injection of the application, realizing high response and precise injection of the double fluid mixed gas. The electromagnetic actuator structure of the multi-hole valve rod is adopted to realize the rapid response of the control valve and the separation of the servo oil circuit and the supply oil circuit; the new valve rod structure is adopted to reduce the weight of the valve and the electromagnetic force demand, improve the response performance, and fundamentally avoid the cavitation problem caused by the traditional control valve structure.

This invention relates to a split-type high-flow-rate, high-pressure oil supply pump assembly, belonging to the field of power machinery technology. The assembly includes a plunger, a plunger sleeve, and an upper body. The plunger is housed within the plunger sleeve, forming a plunger assembly. The upper body is located on the upper part of the plunger sleeve, with a positioning pin between the plunger sleeve and the upper body. An inlet valve spring seat is coaxially mounted at the connection point. An inlet valve core is coaxially mounted within the upper body, with an inlet valve spring between them. The upper body also contains an outlet valve spring seat, an outlet valve core, and an outlet valve spring. The axis of the outlet valve spring seat forms an acute angle with the axis of the plunger. The plunger reciprocates within the plunger sleeve to control the oil output. This invention employs a split-type structure, reducing the processing difficulty and cost of deep holes and tapered holes. It allows for multi-component expansion to quickly generate a series of products. It can also integrate a high-pressure chamber to replace the high-pressure common rail pipe, achieving a compact common rail system and improving system reliability.

The utility model discloses a kind of common rail fuel systems of heavy 12V diesel engine, belong to engine technical field, including the cylinder block of V-type arrangement, six cylinder holes are arranged on each side cylinder block;The high-pressure common rail pump is arranged in the inner wall middle part of the cylinder block of V-type arrangement, high-pressure oil pump is arranged in the lower part of the inner wall of the cylinder block of V-type arrangement, and the high-pressure oil pump is connected with common rail pipe by high-pressure oil pipe respectively;Fuel injector is arranged on the cylinder hole, and each side common rail pipe is connected with corresponding side several fuel injectors by several high-pressure oil pipes respectively.The utility model installs high-pressure common rail pump in fuel system according to diesel engine demand state, provides sufficient fuel supply for diesel engine, solves the arrangement problem in the V-type included angle of heavy 12V diesel engine common rail fuel system, and guarantees the sufficient fuel supply of heavy 12V diesel engine.

The utility model discloses a heavy load lifting translation car, including translation car frame assembly, track subassembly, shearing type hydraulic pressure lifting system, chain type roller conveying system and locking positioning device, the track subassembly is laid in the pit, the translation car frame assembly can be horizontally removed in the upper end of track subassembly, is used for controlling the translation of car body, shearing type hydraulic pressure lifting system sets up in the upper end of translation car frame assembly, is used for controlling the lifting of car body, chain type roller conveying system sets up in the upper end of shearing type hydraulic pressure lifting system, is used for controlling the horizontal removal handover of car body, and this heavy load lifting translation car realizes lifting - translation compound motion through shearing type hydraulic system embedded design, has solved the shortcoming of wide land occupation, high cost of conventional split equipment, and through locking positioning device, eliminates the subsidence risk when the common rail handover, satisfies the coating conveying demand of 14 tons level passenger train car body.

The purpose of this invention is to provide a piston-type booster pump and a fuel injection system based on a dual-solenoid valve booster pump with a flexible and variable injection pattern, belonging to the field of engine technology. Fuel is pressurized by an electronically controlled unit pump and enters the high-pressure common rail. The piston-type booster pump can further pressurize the pressurized fuel, thereby changing the injection pressure of the injector and achieving a variable fuel injection pattern. When only one booster pump solenoid valve is open, the piston-type booster pump has a long booster response time and a slow increase in injection rate. When both booster pump solenoid valves are open simultaneously, the piston-type booster pump has a short booster response time and a fast increase in injection rate. The electronic control unit achieves flexible control of the injection pattern by coordinating the opening and closing sequence of the two booster pump solenoid valves, the electronically controlled unit pump solenoid valve, and the injector solenoid valve.

The MPC combustion control method for marine high-pressure common rail diesel engines based on physical information neural networks belongs to the field of marine high-pressure common rail diesel engine control. It solves the problems of neglecting the physical consistency between the model and the actual engine and poor model generalization ability caused by simply relying on data-driven methods. The method includes: keeping the combustion midpoint constant, acquiring in-cylinder pressure, maximum in-cylinder pressure rise rate, indicated thermal efficiency, and emission data for different pre-injection fuel ratios and pre-main injection timing intervals; calculating the cyclic variation of the diesel engine's average indicated pressure, filtering data, and calculating the cumulative heat release and combustion midpoint; obtaining the influence law of relevant in-cylinder combustion characterization parameters of the diesel engine, determining the crankshaft angle, pre-injection fuel ratio, pre-main injection interval boundary, and maximum cylinder pressure rise rate upper limit corresponding to the pre-injection timing; constructing a diesel engine in-cylinder combustion prediction output model and MPC controller; updating control parameters and combustion state data to achieve closed-loop control. It has applications in energy conservation and emission reduction.

The application relates to the technical field of oil pump bearing assembly, in particular to a high-precision positioning and assembling device for high-pressure common rail high-pressure oil pump bearings, which comprises a clamping assembly for fixing a workpiece, the clamping assembly comprises a mounting cylinder and an auxiliary cover, a plurality of movable components are slidably arranged in the mounting cylinder, a trigger disc is slidably arranged below the movable components in the mounting cylinder, a connecting rod is arranged on the side surface of the mounting cylinder and can limit the position of the auxiliary cover by following the descent of the trigger disc, and a bearing mounting hole is arranged on the auxiliary cover; a platform is arranged for driving the clamping assembly to move, guide grooves and limiting guide grooves are arranged on the platform, a conveying assembly is arranged at the bottom of the platform, and a pressing assembly for pressing the bearings into the pump body is arranged on the platform. According to the application, a plurality of movable components with elastic components are arranged, the descending height of each movable component can be automatically adjusted according to the contour of the pump body, multi-point uniform pressing is realized, the positioning deviation caused by rigid clamping is effectively avoided, self-adaptive clamping is realized, the positioning precision is high, and the assembling precision is improved.

The utility model discloses a marine methanol engine fuel leakage monitoring devices, including connecting channel block, two -way electromagnetic valve and methanol concentration sensor, and the methanol double -walled common rail pipe is fixed between the connection of a plurality of connecting channel blocks respectively. Two -way electromagnetic valve body embeds and fixes in the big end sink hole of connecting channel block rear side ladder sink hole, and the valve core of two -way electromagnetic valve embeds the small end sink hole in the ladder sink hole, and the small end sink hole is perpendicular with the intercommunication hole vertical intersection. The outside of connecting channel block front end center observation window sink hole is equipped with installed transparent observation window, and the one end of detection channel hole is communicated with observation window sink hole respectively, and the other end is perpendicular with the corresponding several outer tube lead -through hole vertical intersection respectively. Methanol concentration sensor lower end is fixed in the upper end of sensor screw hole. The utility model discloses can find the leakage point of methanol double -walled common rail pipe in time fast accurately, and the user is convenient for timely maintenance, thereby has improved the security in the use process of marine methanol engine significantly.

The application discloses an energy-saving buffer conveying method, which comprises the following steps: acquiring tension data of a conveying belt, in-out bottle quantity data and working speed data of each control motor; analyzing the data to obtain energy utilization conditions under different working conditions and an optimization target; performing algorithm optimization according to the optimization target to obtain optimal conveying belt tension values or optimal working speed values of the control motor under corresponding working conditions; and achieving the energy-saving effect of the buffer conveying system through data analysis and optimization algorithm, realizing a more intelligent production process, reducing energy consumption and lowering production cost. In addition, the movement mode of a guide device in the buffer conveying system is changed, one end of a contact guide piece is directly connected with one side of an in-bottle conveying belt and one side of an out-bottle conveying belt, that is, the guide device is realized to be co-rail with the in-bottle conveying belt and the out-bottle conveying belt, and the operation precision of the guide device is improved, and the guide device can keep relatively stable operation in a long-distance moving range.

The engine device according to the present invention includes: a common rail; and a fuel return pipe connected to the common rail and causing fuel in the injector to return to the common rail, the fuel return pipe being connected to one end of the common rail.

Compression-ignited dual-fuel combustion engine for road vehicles, comprising (a) a pilot fuel system with common-rail injection, (b) a glycerin fuel system with a heated tank, heated lines, filter / water separator and at least one air-assist inductor having a coaxial supply of glycerin and auxiliary air from an auxiliary air supply, (c) a control unit configured for coordinated control of the pilot fuel system and the glycerin fuel system depending on sensor data including at least one lambda sensor and an exhaust gas temperature sensor, and (d) an exhaust gas-located oxidation catalyst, wherein the engine is designed for lean operation with an air-fuel ratio > 1 and is configured such that at least 85% of the supplied fuel energy can be provided by glycerin.

The utility model discloses a kind of device for improving the precision of processing high-pressure common rail fuel injector needle valve, it is related to high-pressure common rail fuel injector needle valve processing technical field, including support seat, the top of support seat is equipped with moving block, the top of moving block is fixedly provided with processing assembly, the end of moving block is fixedly provided with laser emitter, the top of support seat is equipped with recess, recess is equipped with adjusting mechanism, and is equipped with calibration block by adjusting mechanism, the top of calibration block is fixedly provided with rack, the top of rack is equipped with clamping mechanism, the inside of calibration block is equipped with light transmission hole, the top of support seat is fixedly provided with calibration plate. The utility model can be after needle valve position is determined, transverse needle valve is moved to make that light emitted by laser emitter can pass through light transmission hole and show on calibration plate, to determine that processing assembly and needle valve are located in same horizontal, ensure accuracy in processing process.

The application discloses a time sequence control rotating detonation engine system combined with a turbojet engine, which comprises a turbojet engine, a shell sleeved on the periphery of the tail nozzle of the turbojet engine, a cylindrical base coaxially arranged on the inner side of the shell, and a fan-shaped detonation tube. A cover driven by an electromagnetic push rod is arranged at the top end of each detonation tube. A sequential ignition control device is arranged, and a fuel supply unit of the sequential ignition control device comprises an oil pump, a fuel coil pipe coiled in the cylindrical base, a common rail ring outside the shell, and a plurality of fuel injectors. A control unit adopts a mechanical time sequence controller, and through rotating a moving contact on an outer rotor, the mechanical time sequence controller sequentially connects static contacts on an electrode distributor, synchronously triggers electromagnetic push rods and fuel injectors of corresponding detonation tubes, and realizes multi-tube sequential cycle detonation. The application recovers exhaust heat energy to preheat fuel through a coaxial integrated structure, supplies air by using an ejecting effect, replaces a complex electronic system with a simple and reliable mechanical control, and realizes efficient, compact, wide working condition adaptation and thrust enhancement.

This invention discloses a drive circuit for an electronically controlled common rail injector for a diesel engine, including a control unit and a boost unit. The control unit includes several operational amplifiers, several resistors, a digital potentiometer, and a capacitor. Among the several operational amplifiers, the non-inverting input of operational amplifier U2 is connected to one end of resistor R4 and one end of resistor R5, the inverting input is connected to one end of resistor R2 and one end of capacitor C2, and the output terminal is connected to the other end of resistor R5, the non-inverting input of operational amplifier U3, and the third pin of digital potentiometer U1. The inverting input of operational amplifier U3 is connected to the other end of resistor R4, one end of resistor R6, and one end of resistor R7. The non-inverting input of operational amplifier U4 is connected to the Vref terminal, the inverting input is connected to one end of resistor R8 and one end of resistor R9, and the output terminal is connected to one end of resistor R1 and the second pin of digital potentiometer U1. The fifth and sixth pins of digital potentiometer U1 are connected to the other end of resistor R2, and the seventh pin and one end of resistor R3 are connected to the Port_1 terminal.

This invention relates to the field of precision manufacturing technology, and in particular to a cold extrusion forming process for an inner support of a control valve seat. The process includes pre-machining a positioning inner hole into a valve seat blank; inserting a pre-fabricated low-melting-point alloy mandrel; applying axial pressure at room temperature to plastically deform the metal at the end face of the inner hole and conform it to the outer wall of the mandrel, forming a variable cross-section flow channel in one step, while retaining multi-functional micro-vent holes at the end of the flow channel; heating to melt and recover the mandrel; and finally, precision machining of the workpiece. This process replaces traditional material removal processing with inner support plastic forming, fundamentally solving the problems of poor coaxiality, damage to material properties, and low efficiency in variable cross-section deep hole machining. It achieves a simultaneous leap in geometric accuracy, mechanical properties, and manufacturing efficiency, and is particularly suitable for manufacturing high-end parts such as control valve seats for high-pressure common rail injectors.