723 results about "Inlet manifold" patented technology

The invention discloses an air-fuel ratio control method for a high-pressure direct injection engine in a diesel-natural gas dual-fuel cylinder, and relates to the technical field of engine control, and the air-fuel ratio control method comprises the following steps: collecting diesel mass flow, natural gas volume flow and natural gas component data, and determining a diesel-natural gas mixing ratio; a basic target air-fuel ratio is obtained by combining the real-time rotating speed of an engine, the load and the diesel oil-natural gas mixing proportion; based on the pressure and temperature of the intake manifold and the rotating speed of the engine, the target air-fuel ratio after model correction is obtained; the working condition load change rate is detected, the pre-optimized air-fuel ratio trajectory MAP is called, and a transient correction target value is generated; calculating the deviation between the transient correction target value and the measured value of the air-fuel ratio sensor and the deviation change rate, and outputting an air-fuel ratio correction value; and the final target air-fuel ratio is calculated and sent to an air flow control valve to execute air inlet adjustment. The method is suitable for engine application scenes requiring high-precision and self-adaptive control to improve combustion efficiency and reduce emission.

The invention discloses a pipeline system for improving the self-pressurization speed of a gas vehicle and reducing the inlet gas temperature rise and a vehicle, and relates to the technical field of vehicle power system heat dissipation, the pipeline system for improving the self-pressurization speed of the gas vehicle and reducing the inlet gas temperature rise comprises an LNG vaporization pipeline, the LNG vaporization pipeline comprises a gas cylinder and a vaporizer, and the LNG vaporization pipeline is used for outputting vaporized LNG to an engine; the supercharging pipeline comprises a supercharger and an intercooler and is used for supercharging outside air to form high-temperature and high-pressure gas and cooling the high-temperature and high-pressure gas so as to convey the high-temperature and high-pressure gas to an engine intake manifold; the cold and heat energy coupling area, a channel between the gas cylinder and the vaporizer and a channel between the supercharger and the intercooler penetrate through the cold and heat energy coupling area so that heat exchange can be conducted between the high-temperature and high-pressure air and LNG. Cold and heat exchange can be achieved through LNG cold energy and the pressurization pipeline, meanwhile, the vaporization efficiency is improved, and the heat dissipation burden of the intercooler is relieved.

Internal combustion engine (1) with at least one combustion chamber (2), at least one prechamber (3) for the at least one combustion chamber (2) and an intake system (4), wherein the intake system (4) comprises : - a liquid fuel supply (9) configured to provide a liquid fuel, - an air-fuel-mixer (10) mixing air with liquid fuel from the liquid fuel supply (9) and providing an air-fuel- mixture, - a combustion chamber intake manifold (7) leading into the at least one combustion chamber (2) and - a prechamber intake manifold (8) leading into the at least one prechamber (3), wherein the air-fuel-mixer (10) is part of the prechamber intake manifold (8) for admixing the liquid fuel to the air in the prechamber intake manifold (8).

The utility model belongs to the technical field of hydraulic pipe cleaning, and particularly discloses a hydraulic pipeline oil string washing device which comprises an oil tank, an oil supply pipeline, an oil inlet pipeline, an oil return pipeline and a cooling loop. The oil supply pipeline comprises a lightering oil pump, an oil supply valve and an oil supply main pipe; the oil inlet pipeline comprises a circulating oil pump, a first oil inlet header pipe and a first oil inlet control valve are arranged between the oil tank and the circulating oil pump, and a second oil inlet header pipe, a one-way valve and a second oil inlet control valve are arranged between the circulating oil pump and the cleaned pipeline system; the oil return pipeline comprises a fine filter, a first oil return header pipe is arranged between the cleaned pipeline system and the fine filter, a second oil return header pipe is communicated between the fine filter and the oil tank, first oil outlet control valves are arranged on the first oil return header pipe and the second oil return header pipe, the fine filter is further communicated with an impurity removal control valve, and the impurity removal control valve is communicated with an impurity removal header pipe. According to the device, safe and reliable cleaning can be provided for pipeline systems with different pressure bearing and precision requirements, and the oil temperature can be controlled to achieve the optimal cleaning effect.

A computing device includes a plurality of rear inlet disconnects extend from the rear side of the housing. The rear inlet disconnects are operable to be fluidly coupled with a rack manifold and receive fluid from the rack manifold. The rear inlet disconnects include a rear-to-front disconnect and a rear-to-cooling disconnect. A front inlet manifold is coupled with the housing and includes at least one front inlet disconnect operable to be fluidly coupled with one or more inlet cooling disconnects extending from the front side of the housing. The inlet cooling disconnects are operable to be fluidly connected with the liquid cooling system. An inlet transmission tube is coupled with an outside surface of the housing. The inlet transmission tube in fluid communication with the rear-to-front disconnect and operable to direct the fluid from the rear-to-front disconnect to the front inlet manifold.

The invention provides an engine control method and device, a computer readable storage medium and a vehicle. The method comprises the steps that under the condition that an engine is in an idling working condition, the opening degree of an exhaust gas recirculation valve of the engine and the opening degree of a throttle valve of the engine are adjusted to the corresponding preset opening degrees correspondingly; the idling working condition is the working condition of non-load operation of the engine; after the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve are adjusted to the corresponding preset opening degrees correspondingly, the pressure of an intake manifold of the engine is obtained; under the condition that the pressure of the intake manifold is smaller than or equal to the pressure threshold value, the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve are increased, so that the pressure of the intake manifold is larger than the pressure threshold value, and the problem that in the prior art, the engine oil consumption generated by pumping engine oil is high due to the fact that the pressure of the intake manifold is low under the engine idling working condition is solved.

The invention provides an intake manifold split charging tool, and relates to the technical field of engine manufacturing, the intake manifold split charging tool comprises two groups of mounting seats, the side walls of the mounting seats are rotatably connected with rotary discs, and a mounting plate is connected between the rotary discs; the device further comprises a hydraulic clamping mechanism, the hydraulic clamping mechanism comprises multiple sets of fixing cylinders, the multiple sets of fixing cylinders are fixedly connected with the side wall of the mounting plate, the multiple sets of fixing cylinders are connected through multiple sets of communicating pipes, fixing rings are arranged in the fixing cylinders, multiple sets of sliding holes are formed in the surfaces of the fixing rings, and the sliding holes are communicated with the communicating pipes. According to the split charging tool for the intake manifold, through the multi-dimensional clamping system, all-dimensional stable constraint on the intake manifold is achieved, and the problem that the clamping stability of a traditional tool is insufficient is solved.

The invention discloses a gas engine cold start difficulty diagnosis method, system and device and a readable storage medium, and relates to the field of cold start fault detection, and the method specifically comprises the steps: determining an initial idle speed segment based on a real-time vehicle speed, a real-time engine rotation speed, a neutral gear signal and a clutch signal when the lowest environment temperature is detected to be smaller than a preset environment temperature threshold value; the initial idling segment is a working state when the vehicle is static and an engine is in an idling mode; in the initial idle speed segment, based on the maximum value of the engine rotating speed, the real-time engine rotating speed, the real-time gas rail pressure, the real-time gas rail temperature, the engine water temperature at the starting point of the initial idle speed segment, the real-time accelerator opening degree and the fault code, the cold start difficulty result of the gas engine is determined; the fault code is a corresponding fault code when the pressure of the intake manifold is smaller than a preset pressure threshold value of the intake manifold. According to the invention, specific faults of cold start difficulty can be identified efficiently and accurately.

The invention discloses a hot EGR flow calculation method and device, an engine and a vehicle. The calculation method comprises the steps that a flow conservation equation of the hot EGR flow is established according to flow conservation; the operation condition of the engine is obtained, and the EGR flow direction is determined according to the operation condition; a corresponding flow conservation equation is solved according to the EGR flow direction, and the initial hot EGR flow is determined; the pressure ratio of the engine is obtained, the initial hot EGR flow is corrected according to the pressure ratio, and the hot EGR flow is obtained; the pressure ratio is a ratio of exhaust manifold pressure to intake manifold pressure or a ratio of exhaust manifold pressure to turbine outlet pressure. According to the technical scheme, the initial hot EGR flow is determined by establishing the mass conservation equation during EGR forward flow and reverse flow and combining the EGR flow direction, the initial hot EGR flow is corrected through the pressure ratio of the engine, the hot EGR flow is obtained, model calculation is used for replacing a hot EGR flow sensor, and the application range of hot EGR is widened.

The invention discloses a double-air-passage double-injection methanol engine air inlet system, belongs to the technical field of engines, and solves the problem of poor air inlet mixing effect of an existing methanol engine. The air inlet structure comprises an air inlet main pipe, the air inlet main pipe is communicated with each combustion chamber of an engine through an air inlet structure, the air inlet structure comprises a first air inlet channel and a second air inlet channel which are independently arranged, and the first air inlet channel and the second air inlet channel are both formed in an air cylinder cover. One end of the first air inlet channel and one end of the second air inlet channel are both communicated with a combustion chamber of the engine, the other end of the first air inlet channel and the other end of the second air inlet channel are correspondingly connected with an air inlet manifold, each air inlet manifold is provided with a methanol injection valve, and the injection direction of each methanol injection valve faces one side of the first air inlet channel and one side of the second air inlet channel. And the other end of each intake manifold is communicated with an intake manifold. According to the air inlet system, the mixing effect of methanol and air can be improved, then the combustion efficiency is improved, and the cost is reduced.

A fluid end for use with a power end. The fluid end comprises a plurality of fluid end sections positioned adjacent one another. Each section includes a single horizontally positioned bore. A plunger is installed within the bore and includes a fluid passageway. Low-pressure fluid enters the bore through the plunger and high-pressure fluid exits the fluid end through an outlet valve installed within the bore. The intake of low-pressure fluid within the fluid end section is regulated by an inlet valve installed within the plunger. Low-pressure fluid enters the plunger through an inlet component attached to both the plunger and an inlet manifold.

An engine backfire problem-based alarming method, apparatus, and device, and a computer-readable storage medium. The method comprises: on the basis of collected information on the current vehicle speed and information on the temperature change of an air inlet pipe, determining whether a backfire problem occurs in an engine of a vehicle; if it is determined that the backfire problem occurs in the engine, calculating a total pressure impact on the air inlet pipe generated by the occurrence of the backfire problem in the engine; and sending alarm information on the basis of the total pressure impact on the air inlet pipe generated by the occurrence of the backfire problem in the engine. The method solves the existing technical problem in the related art that, when an engine backfire problem occurs, natural gas burns in an air inlet pipe, causing the air inlet pipe to crack, thereby rendering a vehicle unable to travel. The method enables an accurate determination of the change in strength of an air inlet manifold on the basis of a pressure impact generated by a backfire problem, thereby identifying in advance whether the air inlet manifold is cracked, providing an advance alarm to prompt replacement of the air inlet manifold, and avoiding the inability of the vehicle to travel due to cracking of the air inlet manifold.

The utility model provides a power take-off device independent of a blast pump and a vacuum pump, which comprises a power transmission mechanism and an engine intake manifold, the engine intake manifold is connected with one end of a first vacuum air pipe, the other end of the first vacuum air pipe is connected with one side of a vacuum tank, and the other side of the vacuum tank is connected with a vacuum pump. The other side of the vacuum tank is connected with one end of a second vacuum air pipe, the other end of the second vacuum air pipe is connected with a vacuum cylinder, and the vacuum cylinder is connected with a power transmission mechanism. According to the power take-off implementation device independent of the inflating pump and the vacuum pump, the blank of a power take-off scheme of a vehicle type without a vacuum pump and an inflating pump on the market is filled, and the possibility is provided for achieving multiple functions of the vehicle type; the power takeoff device is simple in structural arrangement, compared with an air pump and a vacuum pump, electric appliances of the whole vehicle are reduced, the power takeoff device is simpler and more convenient, and a new power takeoff technical route is provided for an oil brake type.

The utility model discloses a heatable intake manifold suitable for a methanol engine, which comprises an intake manifold main body and an intake manifold heating branch, interlayers are arranged in double walls of the intake manifold main body, the intake manifold heating branch comprises a temperature control throttle valve, an intake manifold interlayer and a reversing valve, the intake manifold interlayer is provided with a water inlet, and the reversing valve is provided with a water outlet. Fin plates are embedded in the air inlet manifold interlayer, electric heating wires are embedded in the air inlet manifold interlayer, a water inlet of the air inlet manifold interlayer is connected to a temperature control throttling valve through a water channel, an output port of the temperature control throttling valve is connected to a water outlet main pipe, and a water circulation pipeline passes through a wax type thermostat from the water outlet main pipe. The thermostat first water circulation of the wax type thermostat is that the wax type thermostat is connected with a reversing valve and then is connected to an engine cylinder sleeve, and the thermostat second water circulation connected with the output end of the wax type thermostat is that the wax type thermostat is connected to a water tank and is connected to the engine cylinder sleeve through the water tank. According to the utility model, the direct heating of the intake manifold is efficiently realized, and the heating efficiency of the intake mixed atmosphere is improved.

The application discloses a methanol engine control method, related device and methanol engine, and relates to the field of engine systems. By constructing a physical model of an air system, a first coupling influence compensation term representing the deterministic coupling influence between each actuator can be calculated in real time according to an expected value and an actual working condition. By introducing a nonlinear extended state observer, uncertainty factors, such as methanol injection amount deviation, pipeline carbon deposition, external environment changes and the like, which cannot be covered by the physical model, can be estimated in real time, and a second coupling influence compensation term can be generated. Finally, by a linear state error feedback control law, the first coupling influence compensation term and the second coupling influence compensation term are fused to form a dual-channel collaborative compensation architecture of physical model feedforward and nonlinear extended state feedback, and rapid and accurate control of an intake manifold pressure is realized. Through the cooperation of the physical model feedforward and the disturbance observation feedback, the control robustness of the intake manifold pressure and other key parameters is improved.

The invention relates to a carbon tank desorption system which comprises a carbon tank, an engine and a negative pressure pipeline. A venturi structure pipeline which is shrunk and then gradually expanded in the exhaust direction of the engine is arranged in the negative pressure pipeline, and a second air inlet B, a first air inlet A and an air outlet C of the negative pressure pipeline are sequentially distributed in the pipeline in the exhaust direction of the engine. A negative pressure pipeline is communicated with an exhaust pipeline of the engine through the second air inlet B and the air outlet C to form a bypass branch of the exhaust pipeline; the carbon tank is provided with a first air outlet pipeline and a second air outlet pipeline, and the first air outlet pipeline is communicated with an air inlet manifold of the engine to form an air inlet desorption route; and the second gas outlet pipeline of the carbon tank is communicated with the first gas inlet A of the negative pressure pipeline to form an exhaust desorption route. The device has the advantages that the two branches are arranged at the gas outlet end of the carbon tank, and negative pressure is formed in the negative pressure pipeline through the Venturi structural characteristic of the negative pressure pipeline so that gas in the carbon tank can be sucked in and transmitted to the gas exhaust pipeline to be combusted.

The invention provides a fuel cell system and a humidification control method thereof. The fuel cell system comprises an electric pile, a humidifier and an air pipeline, wherein the air pipeline comprises a dry air inlet header pipe, an air pile inlet pipeline, a dry air bypass, an air return pipeline, a backpressure pipeline and a bypass pipeline; one end of the air return pipeline is connected with an air outlet of the galvanic pile, and the other end is connected with a return air inlet of the humidifier; one end of the backpressure pipeline is connected with a backflow air outlet of the humidifier, and the other end is communicated with external atmosphere; two ends of the bypass pipeline are connected with an air return pipeline and a backpressure pipeline; a first throttle valve is arranged in the dry air inlet main pipe; a second throttle valve is arranged in the dry air bypass; a third throttle valve is arranged in the air return pipeline; and a fourth throttle valve is arranged in the bypass pipeline. In this way, when humidification is needed, the opening degree of the first throttle valve and the third throttle valve can be increased, the opening degree of the second throttle valve and the fourth throttle valve can be reduced, the water supplementing requirement of the humidifier is lowered, and the problems in the prior art are solved.

A vehicle includes an engine, an intake manifold, a starter motor, a battery, and a control apparatus. The intake manifold is coupled to the engine. The starter motor is configured to start up the engine. The battery is configured to drive the starter motor. The control apparatus includes one or more processors, and one or more memories coupled to the one or more processors. The one or more processors are configured to execute idle reduction control, and execute, during execution of the idle reduction control and before cancelling the idle reduction control, adjustment control of adjusting an internal pressure of the intake manifold and causing the internal pressure of the intake manifold to be lower as a voltage of the battery is lower.

A combustion engine arrangement comprising a combustion engine has an intake manifold, and an exhaust manifold the combustion engine arrangement comprising a turbocharged air intake system fluidly connected to said intake manifold. The turbocharged air intake system has an air pump; and an exhaust gas recirculation (EGR) system fluidly connecting said exhaust manifold to said intake manifold, the EGR system comprising an EGR pump. The EGR pump and the air pump are arranged to be independently controllable so as to enable independent control the exhaust gas inflow and the air inflow to the intake manifold of the combustion engine.

The invention discloses a corrugated manifold micro-channel cold plate with a cold and hot channel shunting function and a use method, and belongs to the technical field of semiconductors, the corrugated manifold micro-channel cold plate comprises a shell, heat sinks arranged on opposite surfaces, a cold plate inlet, an inlet manifold, a cold plate outlet, an outlet manifold and a shunting manifold arranged in the shell, the cold plate inlet and the inlet manifold are connected with the shell and are oppositely arranged, and the cold plate outlet and the outlet manifold are connected with the shell and are oppositely arranged. A closed space is formed by the shell, the heat sink, the cold plate inlet and the inlet manifold, and the cold plate outlet and the outlet manifold. In the working process, cooling fluid enters the closed space of the cold plate through the cold plate inlet and the inlet manifold, then the cooling fluid is precisely conveyed to different cooling areas through the flow dividing manifold, independent cold and hot channels are constructed by combining the different cooling areas formed by the heat sink, and the heat exchange process is completed. The invention provides a structural design of separating a cold channel from a hot channel, and overcomes the defects in the prior art.

The invention discloses a fuel cell bipolar plate and a flow field structure thereof, the flow field structure comprises: an inlet manifold extending along a gas flow direction and having a circulation cross-sectional area gradually reduced along the gas flow direction; a plurality of parallel flow channels are arranged on the side wall of the inlet manifold in the same direction in the direction perpendicular to the gas flowing direction, and the sectional dimensions of the flow channels in the direction parallel to the gas flowing direction are changed in a gradient mode. The flow field structure realizes uniform distribution of gas flow among different flow channels; according to the battery comprising the flow field structure, the problem of local high temperature caused by nonuniform electrochemical reaction due to reduction of oxygen uniformity is avoided.

The utility model is suitable for internal combustion engine gas supply mechanism technical field provides a kind of multi-point injection air intake pipe of gas machine, comprising: main pipeline, its one side is equipped with air inlet, the other side of main pipeline is equipped with several air intake manifold, each air intake manifold is equipped with air jet nozzle, the flow direction of the gas in the inside of air jet nozzle and air intake manifold has certain angle, air intake manifold and main pipeline use integrated structure, by this, the utility model is guaranteed by setting integrated air intake structure, the reliability of air intake, while setting a kind of separate air jet structure, to ensure the separate control to engine, optimization control effect.

To avoid, in an engine system comprising an exhaust gas recirculation device, function failure due to infiltration of condensate water into an intake pipe pressure introduction pipe.SOLUTION: A gas fuel supply device for an engine has a fuel cylinder 1, a regulator 2, an intake passage 5 comprising a throttle 3 and a mixer 4, a fuel pipe 8, an engine 10, and an exhaust gas recirculation device 13 that recirculates part of exhaust gas to the intake passage 5 as EGR gas, the gas fuel supply device comprising an intake pressure outlet formed in the intake passage 5, and a mounting part formed around the intake pressure outlet. The regulator 2 has an intake pressure inlet 30 formed on its outer surface. The regulator 2 is fixed to the mounting part by a fixing member in a state where the intake pressure outlet and the intake pressure inlet 30 are in direct and airtight communication.SELECTED DRAWING: Figure 1

The utility model provides a semi-automatic hot plug device of an intake manifold, which relates to the technical field of hot plug devices of intake manifolds, and comprises a bottom plate and a fixing mechanism, the left side of the bottom plate is fixedly connected with the fixing mechanism, the fixing mechanism comprises a fixing assembly and a pushing assembly, the fixing assembly is arranged on the left side of the bottom plate, and the pushing assembly is arranged on the right side of the bottom plate. Through the arrangement of the functional assembly, when the hot plug operation of the intake manifold is carried out, a heating ring is used for heating the mounting part of the intake manifold to a certain temperature so as to facilitate hot plug, and after an electric telescopic rod pushes the intake manifold to complete mounting, a cooling fan blows air for cooling, so that the hot plug operation of the intake manifold is completed. After insertion, the interface is rapidly cooled, the sealing and stability of the installation of the intake manifold are ensured, the design of the handle enables the whole device to be more portable and convenient to operate, as the installation positions of the intake manifold are different, the position of the functional assembly can be adjusted according to the actual situation, and the hot insertion operation of the intake manifold can be completed more efficiently.

An electronics package includes a manifold housing defining an enclosure and including an inlet port fluidly coupled to an inlet manifold, an outlet port fluidly coupled to an outlet manifold, a first inlet, a second inlet, a third inlet, and a fourth inlet, each fluidly coupled to the inlet manifold and the enclosure, and a first outlet, a second outlet, a third outlet, and a fourth outlet, each fluidly coupled to the outlet manifold and the enclosure. The electronics package also includes a first circuit board coupled to the manifold housing, and a second circuit board coupled to the manifold housing such that the second circuit board is offset from the first circuit board by a first gap. The electronics package further includes a third circuit board coupled to the manifold housing such that the third circuit board is offset from the second circuit board by a second gap.

A fluid end for use with a power end. The fluid end comprises a plurality of fluid end sections positioned adjacent one another. Each section includes a single horizontally positioned bore. A plunger is installed within the bore and includes a fluid passageway. Low-pressure fluid enters the bore through the plunger and high-pressure fluid exits the fluid end through an outlet valve installed within the bore. The intake of low-pressure fluid within the fluid end section is regulated by an inlet valve installed within the plunger. Low-pressure fluid enters the plunger through an inlet component attached to both the plunger and an inlet manifold.

A frameless cooling module to cool a fluid in a motorized vehicle includes a first heat exchanger comprising an inlet manifold; an outlet manifold; and a plurality of ducts fluidly connecting the inlet manifold to the outlet manifold. The inlet manifold and the outlet manifold couple to a chassis of the motorized vehicle.

A diagnostic system for an engine system comprising a plurality of engine cylinders (30) and an air intake manifold (44) for receiving an intake of air during an intake phase of an engine cycle, the diagnostic system comprising; a plurality of fuel injectors (46), each for delivering fuel to an associated one of the engine cylinders (30) via the air intake manifold (44), wherein each of the plurality of fuel injectors (46) has an injector-open state when the fuel injector (46) is delivering fuel during the air intake phase of the associated engine cylinder (30) and an injector-closed state when the fuel injector (46) is not delivering fuel; and a sensor configured to measure the air pressure in the air intake manifold. The diagnostic system further comprises a controller (18) configured to determine an occurrence of a backfire event in the air intake manifold (44) on the basis of the measured air pressure; measure the number of backfire events in the air intake manifold which are associated with one of the fuel injectors (46); compare the number of backfire events with a predetermined count threshold, and, if the measured number of backfire events is greater than the predetermined count threshold, output a warning signal.

Engine system, with: an engine with a plurality of cylinders (11-14) suitable for generating a driving torque by burning fuel; a first intake manifold (31) which is connected to an intake pipe (20) through which intake air flows into a part of the majority of cylinders; a second intake manifold (32) which supplies the intake air through the first intake manifold (31) to another part of cylinders of the plurality of cylinders (11-14); a first exhaust manifold (41) which is connected to a part of the cylinders which is connected to the first intake manifold; a second exhaust manifold (42) which is connected to another part of the cylinders which is connected to the second intake manifold (32); a return line (60) branched off from the second exhaust manifold (42) to be coupled to the second intake manifold (32); a recirculation inlet valve (61) located at the point where the recirculation line (60) and the second exhaust manifold (42) are connected; and a manifold connecting valve (63) which is arranged on an inlet line (20) between the first inlet manifold (31) and the second inlet manifold (32), wherein, when some cylinders are deactivated, the recirculation inlet valve (61) is open to supply exhaust gas from the second exhaust manifold (42) to the second inlet manifold (32), and the manifold connecting valve (63) is cut off in order to prevent intake air from being supplied through the first intake manifold (31) to the second intake manifold (32), and the entire exhaust gas flow rate from the deactivated cylinders flows back into the deactivated cylinders.