212results about How to "Reduce intake resistance" patented technology

The invention provides a multi-stage supercharging flexible air system with an electric supercharging function for an engine. The multistage supercharging flexible air system involves an electric supercharger, the engine, a turbocharger, an air storage tank and a controller, wherein an air inlet communicates with the air inlet end of a first air compressor of the electric supercharger through a pipeline, the air inlet communicates with the air inlet end of a second air compressor of the turbocharger through a pipeline, and a one-way valve is arranged on the pipeline; the air outlet end of thefirst air compressor communicates with the air inlet end of the second air compressor through a pipeline; the air outlet end of the second air compressor communicates with an air inlet pipe of the engine through a pipeline via an air inlet intercooler and an air inlet heater; an air outlet pipe of the engine communicates with a turbine air inlet end of the turbocharger; the output end of the controller is electrically connected with a motor of the electric supercharger; the motor is used for driving the first gas compressor to operate; and a turbine of the turbocharger drives the second air compressor to operate through exhaust energy of the air outlet pipe of the engine.

The invention relates to a water-circulating-type thermal energy comprehensive utilization thermal management system for an electric vehicle, the vehicle comprising the thermal management system and an operation method of the thermal management system. The water-circulating-type thermal energy comprehensive utilization thermal management system for the electric vehicle comprises a refrigerant circulating loop and further comprises a water circulating loop. The refrigerant circulating loop comprises a refrigerant circulating primary road and two refrigerant circulating branches; an electronic compressor and a water-cooled condenser are arranged on the refrigerant circulating primary road; the first refrigerant circulating branch is provided with an evaporator electronic expansion valve andan air conditioning evaporator; and the second refrigerant circulating branch is provided with a water-cooled heat exchanger electronic expansion valve and a water-cooled heat exchanger. The water circulating loop comprises a water circulating primary road and at least two water circulating branches; the first water circulating branch conducts heat exchange with the water-cooled heat exchanger forcooling a battery pack; and the second water circulating branch conducts heat exchange with the water-cooled condenser for heating a passenger compartment. The water circulating loop is additionallyarranged in the thermal management system, the two branches of the water circulating loop conduct heat exchange with a refrigerant of an air conditioning system, thus the advantage of the high air conditioning refrigeration efficiency can be given into full play, thermal energy generated by other parts of the vehicle is fully utilized, and energy is saved.

The invention discloses an air filter which can be used in fuel cells. The filter comprises a filter shell, a physical filter element and a chemical filter element; the physical filter element is arranged at the position of an air inlet and positioned at the front end of the chemical filter element, the physical filter element is connected with the chemical filter element by a sealing baffle, and the center thereof is provided with a common airflow passage. The filter element of the air filter consists of two parts, one part is used for physically filtering particulate pollutants in the air and the other part is used for chemically filtering harmful chemical gas (NOx, SO2, NH3, CmHn and the like) in the air. The physical filter part takes paper material or non-woven fabrics as a filter element material and the chemical filter part takes a chemical adsorbent as the filter element material. The chemical filter part consists of multilayered structures which respectively adsorb different chemical pollutants, and the chemical filter part is a hollow cone with a specific angle. The structure has the main advantages of sufficient air intake, small intake resistance, even flow speed distribution of the gas in the filter and high filter efficiency.

The invention discloses an automobile noise reduction system with one-fourth wavelength pipes combined with a Helmholtz silencer, and belongs to the technical field of environment control and improvement in order to solve the problems that an existing automobile noise reduction system is high in manufacturing cost, poor in noise elimination effect, high in air inlet resistance and consumed power, poor in fuel economy and not suitable for various automobiles. The Helmholtz silencer is communicated with the side wall of a front air inlet guide pipe, the front air inlet guide pipe is communicated with an air filter, an air filtering net is arranged in the air filter, the air filter is communicated with a first rear air inlet guide pipe, the first rear air inlet guide pipe is communicated with a second rear air inlet guide pipe through a flexible connecting pipe, an air throttling valve is arranged on the second rear air inlet guide pipe, the second rear air inlet guide pipe is communicated with an air inlet header pipe, the air inlet header pipe is communicated with an air inlet manifold, and one ends of the two one fourth wavelength pipes are both connected and communicated with the side wall of the first rear air inlet guide pipe. According to the system, while power property and economy of an automobile are maintained, the noise of the whole automobile can be lowered particularly, the environment quality can be improved, and the system is suitable for various automobiles.

The invention discloses an electronic vacuum pump for a new energy vehicle brake vacuum booster. The electronic vacuum pump comprises a motor assembly, a supporting base, a pump chamber lower cover, a driving sleeve, a pump rotor, blades, a pump chamber, a pump chamber upper cover, a pump body cover and fixing pins, wherein a left side air feeding slot of the pump chamber lower cover, a left side air feeding through hole of the pump chamber and a left side air feeding slot of the pump chamber upper cover are communicated with one another to form an air passageway; a right side air feeding slot of the pump chamber lower cover, a right side air feeding through hole of the pump chamber and a right side air feeding slot of the pump chamber upper cover are communicated with one another to form an air passageway; a flow guide slot of the pump chamber lower cover is communicated with an inner cavity of the pump chamber; an air discharging slot of the pump chamber upper cover is communicated with the inner cavity of the pump chamber; the flow guide slot of the pump chamber lower cover and the air discharging slot of the pump chamber upper cover are symmetric. When the vacuum pump works, an air path with four air inlets and two air outlets is formed; therefore, the air feeding resistance is greatly reduced, and the air feeding amount of the pump chamber is increased; under the equal energy consumption, the vacuumizing efficiency of the vacuum pump provided by the invention is higher.

An electronic throttle control device in a internal combustion engine for a vehicle can be improved in maintainability and can be reduced in size. An electronic throttle control device in a V-type internal combustion engine for a vehicle has a fuel injection valve and throttle valves in an intake passage. A throttle driving motor controls the opening angle of each throttle valve according to the amount of operation of a throttle grip performed by an operator of the vehicle. The throttle driving motor is located outside a region surrounded by the throttle bodies that are respectively connected to all of intake ports as viewed in plan.

The invention discloses an anti-surge control method of a high-pressure waste gas recycling supercharger of a diesel engine. The method includes the steps that 1, an ECU reads air inlet pressure, airinlet temperature and air flow signals of the engine, and the actual pressure ratio and air flow mass flow of the supercharger (1) are calculated; 2, whether the actual pressure ratio exceeds a critical pressure ratio of surge corresponding to the air inlet amount or not is judged, if yes, step 3 is executed, and if not, a waste gas recycling valve (4), a throttle valve (3) and the supercharger donot act; 3, the ECU reads the rotating speed and torque of the engine, and the speed change rate and torque change rate of the engine are calculated; 4, whether the speed change rate and the torque change rate of the engine exceed limit values or not is judged, if yes, step 5 is executed, and if not, the waste gas recycling valve, the throttle valve and the supercharger do not act; 6, the anti-surge state quits. According to the method, the problem of surge of the supercharger during normal running of a diesel vehicle is solved on the premise that emission and performance indexes of the engine are not reduced, and noise and moving caused by surge can be avoided.

The invention discloses an air purifying device, relates to the technical field of air purification, and provides an air purifying device which is improved comprehensively at the aspects of air volume, noise and efficiency compared with the prior art. The air purifying device comprises a fan, air filters and a framework of a hollow structure, wherein the cross section of the framework is n-sided shaped, wherein n>=3; the framework comprises n lateral surfaces and two end surfaces; at least two lateral surfaces of the framework are provided with the air filters of panel structures; the end surfaces of the framework provided with purified air outlets; the fan is arranged in the framework; an air outlet of the fan is connected with the purified air outlets. According to the invention, the use of the air filters increases, and a sealed space is defined by the air filters; air can enter the sealed space from each air filter; the fan absorb purified air from the sealed space and conveys the purified air to the required position; the air intake resistance is low; performances at each aspect are improved obviously.

A motorcycle that reliably supports a load imposed on a seat while increasing charging efficiency. An intake pipe is provided in a center area in a width direction and extends rearward across and beyond an upper cross member. Left and right seat rails are provided on opposite sides of the intake pipe, and are connected to left and right main frames at portions forward of a point at which the intake pipe exceeds the upper cross member in height.

The invention relates to a negative pressure adjusting device for an inlet of a compressor with a variable diameter, which is especially applicable to a compressor performance testing platform of a vehicular turbocharger, belonging to a machinery technical field. The negative pressure adjusting device comprises a fixing frame, a plurality of blades and an operation device; the blades are aligned according to the clockwise order, so that the peak end of every blade is pressed on the former one blade, blade rotating shafts are correspondingly inserted to blade rotating shaft positioning holes on the fixing frame one by one; so that all the blades are aligned in a fixing frame groove in a staggering manner. Stirring shafts on the operation disk are respectively crossed through the through grooves on the corresponding blades, and then the end parts of the stirring shafts are inserted to stirring shaft guide grooves of the fixing frame. With the adoption of the negative pressure adjusting device, the section of a through flow at the compressor inlet is conveniently and quickly changed, and therefore, the inlet negative pressure of the compressor is adjusted; the regular shape of the through flow face and the symmetry related to the pipeline center can be guaranteed, the air inlet resistance is reduced, and the bad influence on the test by the irregular shape of the air inlet is eliminated.

The invention provides an air inlet device of an automobile engine. The air inlet device comprises an air inlet pipe, an air cleaner assembly and an air outlet pipe, wherein the air inlet of the air cleaner assembly is communicated with the air inlet pipe, and the air outlet of the air cleaner assembly is communicated with the air outlet pipe; the air inlet pipe comprises an air inlet pipe opening, an air inlet pipe body and a flow guide pipe; the flow guide pipe is communicated with the air inlet of the air cleaner assembly; the air inlet of the air inlet pipe body is connected with the air inlet pipe opening, and the air outlet of the air inlet pipe body is connected with the flow guide pipe; tone tuning holes are formed in the air inlet pipe body; the air inlet pipe body is provided with an arc-shaped corner. The invention further provides an automobile with the air inlet device. The air inlet device has the benefits as follows: airflow is guided at the air inlet pipe to eliminate the defect of turbulence so as to facilitate improvement of the cleaning performance; through the tone tuning holes, the air inlet resistance is reduced and noise generated by air intake is lowered.

The method of manufacturing elbow pipe of small curvature radius is one with core axle. The pipe bending process includes stringing a core axle into material pipe, fixing one end of the material pipe to the bending mold, and turning the bending mold in the bending machine while applying two auxiliary push forces, including one in the direction for the inner wall to contract and one other in the direction for the outer wall to stretch. The present invention makes it possible to manufacture metal elbow pipe with wall thickness smaller than 0.5 mm and ending radius greater than 0.5D, and may be used in manufacturing intake pipe, cooling air pipe, etc for automobile engine.

The invention relates to a water circulation type thermal management and air conditioning system for an electric vehicle, a vehicle including the thermal management and air conditioning system and anoperation method of the thermal management and air conditioning system. The water circulation type thermal management and air conditioning system for the electric vehicle comprises a refrigerant circulation loop and a water circulation loop. The water circulation type thermal management and air conditioning system for the electric vehicle is characterized in that the refrigerant circulation loop comprises an electronic compressor, a water-cooled condenser, a water-cooled heat exchanger electronic expansion valve and a water-cooled heat exchange; the water circulation loop comprises a water circulation trunk road and at least two water circulation branches, wherein the circulating water of one water circulation branch is heat exchanged with the water-cooled heat exchanger for cooling a passenger compartment and / or a battery pack, and the circulating water of the other water circulation branch is heat exchanged with the water-cooled condenser for heating the passenger compartment; and apart which cools the passenger compartment is a refrigerator, a part which heats the passenger compartment is a heater, and the refrigerator and the heater form a water-cooled air conditioning system.Different from a traditional vehicle air conditioner, the water circulation type thermal management and air conditioning system for the electric vehicle adopts the water-cooled air conditioning system and utilizes the refrigerator and the heater which are arranged in series to refrigerate and / or heat the passenger compartment, the advantage of high refrigeration efficiency of an air conditioner is fully achieved, the heat energy generated by other parts of the vehicle is fully utilized, and energy is saved.

Provided is a turbocharger compressor volute with a noise reduction function. The turbocharger compressor volute with the noise reduction function comprises a shell, and an air inlet channel with the two ends open is formed in the shell. The shell is further provided with a plurality of annular silencing cavities which surround the air inlet channel and are arranged at intervals in the axial direction. Every two adjacent annular silencing cavities communicate with each other through a plurality of silencing holes B. A plurality of silencing holes A used for enabling the annular silencing cavity closest to the air inlet edge of the air inlet opening section to communicate with the air inlet channel are formed in the air inlet opening section. The shell is further provided with a secondary air inlet slot used for enabling the air inlet channel to communicate with the annular silencing cavity furthest from the air inlet edge of the air inlet opening section. The turbocharger compressor volute with the noise reduction function has the advantages that the three annular silencing cavities are designed according to the silencing frequency range, every two adjacent cavities communicate with each other through the silencing holes B, accordingly an expanded cavity structure is formed, and different voice frequencies are eliminated according to different expansion ratios; and meanwhile, the three cavities are combined, a silencing frequency band can be formed through simulating calculation, the effect of lowering noise within a small space is achieved, and the surge-resistant control effect is also achieved.

The invention aims at providing a flexible supercharging system of a diesel engine and a control method of the flexible supercharging system. The flexible supercharging system comprises the diesel engine, an exhaust gas turbine and a gas compressor, wherein the exhaust gas turbine is connected with the diesel engine through an exhaust pipe; the gas compressor is connected with the diesel engine through an air inlet pipe; the exhaust gas turbine is connected with the gas compressor through a hydraulic coupler; the air inlet pipe is provided with an intercooler; the exhaust pipe is branched to form an exhaust gas control pipe communicated with the atmosphere; the exhaust gas control pipe is provided with an exhaust gas control valve; the air inlet pipe located between the intercooler and the gas compressor is branched to form an air control pipe communicated with the atmosphere; the air control pipe is provided with an air control valve; an outlet of the gas compressor is provided with a pressure sensor; and a shaft where the exhaust gas turbine is connected with the hydraulic coupler is provided with a rotating speed sensor. By using the flexible supercharging system, the aims of outputting a large torque under a low working condition and protecting the rotating speed at a high working condition can be achieved, the efficiency of a complete machine can be increased, and the consumption of fuel oil under a full-working condition can be reduced.

The invention relates to an oil bath air filter, which comprises an air inlet pipe seat, a butterfly nut, an anti-vibration sealing ring, a shell, an upper port sealing ring, a ventilated filter element cover, an oily filter element, a filter element accommodating body and an oil baffle disc. In the oil path dust cross structure, dust absorption oil is stored in an oil storage cavity, air contacts the dust absorption oil and then enters a capillary tube of the oily filter element after being sucked, dust and solid particles in the air are subjected to secondary oil adsorption, and fine dust in the air can be adsorbed and removed; the oily filter element is a polyurethane foam sponge, has high filtering efficiency and long service life, and is convenient to clean; the shell and the air inlet pipe seat are formed by pressing modified engineering plastic which has high injection forming performance, a cavity which meets the design requirement can be conveniently formed by pressing, and air inlet resistance and anti-vibration sound absorption performance are high; and steel is replaced by the plastic, so that production efficiency is high, quality is stable, weight is light, the air inlet quality of a diesel engine is ensured and the sufficient combustion of diesel oil is better facilitated due to a dual seal structure, and the output power of the diesel engine is improved.

The invention discloses an electronic vacuum pump for a new energy vehicle brake vacuum booster. The electronic vacuum pump comprises a motor assembly, a supporting base, a pump chamber lower cover, a driving sleeve, a pump rotor, blades, a pump chamber, a pump chamber upper cover, a pump body cover and fixing pins, wherein a left side air feeding slot of the pump chamber lower cover, a left side air feeding through hole of the pump chamber and a left side air feeding slot of the pump chamber upper cover are communicated with one another to form an air passageway; a right side air feeding slot of the pump chamber lower cover, a right side air feeding through hole of the pump chamber and a right side air feeding slot of the pump chamber upper cover are communicated with one another to form an air passageway; a flow guide slot of the pump chamber lower cover is communicated with an inner cavity of the pump chamber; an air discharging slot of the pump chamber upper cover is communicated with the inner cavity of the pump chamber; the flow guide slot of the pump chamber lower cover and the air discharging slot of the pump chamber upper cover are symmetric. When the vacuum pump works, an air path with four air inlets and two air outlets is formed; therefore, the air feeding resistance is greatly reduced, and the air feeding amount of the pump chamber is increased; under the equal energy consumption, the vacuumizing efficiency of the vacuum pump provided by the invention is higher.

The strengthened cyclone single-barrel straight-through type air filter for a desert, which successively consists of a blind window type tangential air inlet device (1), an air inlet cyclone device (2), an air / dust separating cavity (3), an automatic dust discharge system (4), a main filter (5) and a safe filter element (6). The strengthened cyclone single-barrel straight-through type air filter is structurally characterized in that air flowing in an engine flows through the blind window type tangential air inlet device (a preliminary cyclone device) at first to form cyclone, the rotation strength of airflow discharged from the main cyclone device is greatly strengthened via the air inlet cyclone device (the main cyclone device), and after the rotating airflow enters the air / dust separating cavity, dust in the airflow is subsided onto the wall of the separating cavity under effects of centrifugal force, is blown to a dust collecting cavity by automatic dust blowing blades, and then is discharged from the filter by a dust discharging valve via a dust discharging tube. After being precisely filtered by the main filter, air separated in a strengthened centrifuging manner flows through the safe filter element, and finally clean airflow is led to the engine from an air outlet tube of the main filter.

A vehicle has a body frame that does not interfere with an injector. A down tube extends downward to the rear. An engine is disposed with its cylinder axis inclined rearward. An intake pipe located between the down tube and the engine extends obliquely upward from a forward side of the engine. A fuel injector is attached to the intake pipe. The intake pipe includes a straight throttle body connected to the engine. The fuel injector is mounted on a rearward side of the throttle body relative to a forward side where the down tube is disposed.

A plurality of convex portions are radially fanned and spaced apart from each other by a constant angle in a planar view on a tapered surface of a land portion formed on a bottom surface of a cavity formed in a top portion of a piston. Each convex portion is positioned such that the extending direction of the convex portion aligns with an axis X of a corresponding fuel spray. Thereby, each fuel spray moves forward through a space (convex portion space) between the corresponding convex portion and an inner wall of a cylinder head portion along the extending direction of the corresponding convex portion. When a fuel injection is performed during the latter half of a compression stroke, a pressure in a convex portion space is increased, compared with a pressure in a space of the other portion by the decrease of a ratio of the volume of the convex portion space relative to the volume of the space of the other portion by the proceeding of the compression by the piston. Each fuel spray is circumferentially expanded by the pressure difference.

The present invention discloses a motorcycle air filter which comprises an air filter casing, an air filter cover, an air filter filtering core, an air inlet pipe and an air outlet pipe, wherein, the air outlet pipe is connected with an air outlet at the wall of the air filter casing; the air filter casing is buckled with the air filter cover; the air filter filtering core is arranged in an inner cavity formed by the air filter casing and the air filter cover; the air filter cover and the air inlet pipe are in an integral structure; the end of the air inlet pipe is open; a tubular air inlet connecting piece is assembled at the air inlet pipe by the open end of the air inlet connecting piece; the closed end of the air inlet connecting piece is provided with an air inlet. The motorcycle air filter can ensure that sufficient air enters into a carburetor, and the air and gasoline are atomized and mixed in the carburetor with good effect by reducing the air inlet resistance of the air filter and enlarging air inlet quantity, so that mixed gas enters into the engine and can burn entirely; the power and the torquemoment of the engine are all ensured; the motorcycle air filter reduces fuel consumption and also effectively reduces the tail gas emission at the same time.

The invention provides a dust removal method and device for the intake air of an automotive vehicle. The method comprises the following steps of: arranging at least one electric dust removal device in an air intake pipeline of the automotive vehicle, absorbing dust particles contained in the intake air of the automotive vehicle by using an electric field produced by the electric dust removal device, introducing the dust-removed air into an air intake duct of an engine, and regularly discharging the dust particles absorbed by the electric field out of the at least one electric dust removal device.

An intake flow control apparatus for an internal combustion engine eases operation of an air flow regulator and permits use of a short intake passage, thus providing a high output. The intake flow control apparatus includes an air routing member having an intake passage formed therein, and an air flow regulator opposed to an upstream-side opening of the intake passage. The air flow regulator moves in an intake axis direction while being guided by a light-weight guide structure to control the amount of intake air supplied. The air flow regulator may include plural valve elements different in operation timing, in which a valve actuator successively actuates the plural valve elements in accordance with a throttle operation to control the amount of intake air. The apparatus also includes a vacuum moderating structure for reducing the effective strength of a vacuum applied to the air flow regulator.

The invention relates to variable air volume type air intake branch pipe. Air intake ports communicated with air exhaust pipes are made directly on an intermediate plate in a pressure stabilizing cavity in a way of corresponding to the air exhaust pipes; exchange-over valves are sealed and arranged on the air intake ports; the valve plates of the exchange-over valves are jointly arranged on the same transmission shaft which is driven by a vacuum valve arranged at the input end on the lateral side of the air intake branch pipe to swing; and the vacuum valve is controlled to act by an electromagnetic valve arranged on the lateral side of the intermediate plate of the air intake branch pipe. The electrical control mode adopted in the invention is quick in response, ensures that the most proper air amount is supplied under a corresponding working condition in time, achieves high air volume control accuracy and stability, improves the dynamic property of an engine and increases the air flow rate in a cylinder by improving the air intake speed of the engine at a high rotation speed, so a sub-combustion process is improved and the economy of low-speed fuel oil in the engine is improved.

In a hybrid vehicle that selects a series mode in which an engine drives a motor generator to generate electric power and a driving motor drives drive wheels, fuel supply to the engine is stopped and motoring in which the motor generator forcedly drives the engine can be performed, failure determination of a front O2 sensor and a rear O2 sensor provided in an exhaust passage of the engine can be performed based on a change in a detection value of the sensors when the fuel supply is stopped, and a throttle valve of the engine is forcedly opened in the motoring.

The invention provides an air inlet manifold and an automobile engine comprising the air inlet manifold. The air inlet manifold comprises a pressure stabilizing cavity and at least two air channels which are communicated with the pressure stabilizing cavity, wherein the pressure stabilizing cavity is provided with an air inlet connected with a throttle valve; the joints of the air channels and the pressure stabilizing cavity have unequal filleted structures by which air is uniformly distributed into each air channel after passing through the air inlet and being subjected to pressure stabilization in the pressure stabilizing cavity. Preferably, at the joints of the air channels and the pressure stabilizing cavity, the fillet of a single air channel vertical to the air inlet direction is greater than a fillet in the air inlet direction; at the joints of the air channels and the pressure-stabilizing cavity, the fillet of a first air channel in the air inlet direction is greater than the fillet of a tail air channel, and the fillet of a middle air channel is smaller than the fillets of the first air channel and the tail air channel. By adopting the structure, the air inlet pressure loss can be reduced effectively, the difference among the pressure loss of each air channel is lowered, the air inflow of each cylinder kept uniform while the air inflow of each cylinder is increased, and the power performance and economical efficiency of the engine are improved and increased.

The invention relates to an air filter for an automobile and in particular relates to a small-sized air filter with a laterally arranged filter core, wherein the filter provided by the invention is mainly used for solving the technical problem that the existing air filter has a large maintenance space requirement and deficient flow resistance. The technical scheme is as follows: the small-sized air filter with the laterally arranged filter core comprises a shell, a main filter core, a safe filter core and a back cover and is characterized in that the inner cavity of the shell is divided into two relatively independent chambers by a baffle; the main filter core is sealed in the 1# chamber; the safe filter core is sealed in the 2# chamber and fixed by a bracket; the outside of the bracket is provided with a side cover; and a middle channel is arranged between the 1# chamber and the 2# chamber. The air filter can be well applied to a small space, and the intake resistance of the air filter can be reduced to a certain extent, thereby improving the dynamic property of the whole automobile.

The invention discloses a plastic air intake manifold assembly for a naturally aspirated engine. The plastic air intake manifold assembly comprises a cylinder cover flange, an intake manifold, a pressure-stabilized chamber and a throttle valve flange, wherein air sequentially flows through the throttle valve flange, the pressure-stabilized chamber, the intake manifold and the cylinder cover flangeand then enters an air intake channel of the engine; the cylinder cover flange is arranged above the pressure-stabilized chamber; the throttle valve flange is arranged at one side of the pressure-stabilized chamber; the intake manifold is in a coiling shape and wraps the pressure-stabilized chamber; the plastic intake manifold assembly is manufactured by sequentially welding a first outer sheet,a lower intermediate sheet, an upper intermediate sheet and a second outer sheet through a vibrating friction welding technology; the first outer sheet, the lower intermediate sheet, the upper intermediate sheet and the second outer sheet are manufactured through nylon. According to the plastic air intake manifold assembly for the naturally aspirated engine, the nylon sheets are welded through thevibrating friction welding technology to form the plastic intake manifold assembly, so that the density is low; the mass is light; the inner wall is smooth; the dynamic property of the engine can beimproved, and the fuel oil consumption can be reduced; the air intake resistance is low, so that the dynamic property of the engine can be played highly, and moreover, the fuel oil consumption rate can be reduced.

The invention discloses a vessel capable of releasing negative pressure automatically. The vessel comprises a container and a cup lid, wherein the cup lid comprises a top cover, a cover body and an inner cover; the top cover is in threaded connection with the top end of the cover body; the cover body is in threaded connection with the outer side of a container opening; the top surface of the cover body is sunken inwards to form an accommodating cavity; the upper end of the inner cover is connected with the cover body; the lower end of the inner cover extends into the container opening; a sealing ring is arranged in a clamping groove in the bottom end of the inner cover; the edge part of the bottom surface of the inner cover is sunken upwards to form a concave cavity; an air channel is arranged above the concave cavity; the air channel extends outwards, communicates with an inner side gap, and communicates with the atmosphere through a gap between the inner side and the outer side of the cover body; a pressure-release partition plate is arranged between the concave cavity and the air channel; and a one-way air inlet valve is clamped in a pressure-release hole of the pressure-release partition plate. According to the vessel capable of releasing negative pressure automatically, the cup lid is not tightly pressed on the opening and is easy to open; and owing to a simple negative-pressure release structure, not only are the production cost and the assembly time greatly saved, but also tableware contamination caused by the atmosphere can be avoided.