4207 results about "Throttle" patented technology

System and methods are disclosed for navigating a host vehicle. In one implementation, at least one processing device may be programmed to receive a plurality of images representative of an environment of the host vehicle, identify, in at least one of the plurality of images a representation of, a target vehicle, determine a separation distance between the host vehicle and the target vehicle, if the separation distance is less than a comfort distance threshold, cause a reduction in a throttle level associated with a throttle system of the host vehicle without activating a braking system associated with the host vehicle, and if the separation distance is determined to be greater than but trending toward a safe distance threshold, which is less than the comfort distance threshold, cause activation of the braking system associated with the host vehicle.

The invention relates to the technical field of intelligent transportation control, in particular to a tomato transportation speed self-adaptive adjustment method based on path road condition feedback, which comprises the following steps: acquiring road images, vibration waveforms and altitude data through a multi-source sensing unit, and constructing real-time road condition information; identifying a driving mode and extracting a corresponding bumping parameter; detecting the maturity grade of the tomato by combining multispectrum and thermal imaging, and querying a maturity-compressive strength corresponding table to calculate a cargo damage threshold value; constructing a dynamic mapping model under multiple working conditions, predicting vibration response and converting the vibration response into equivalent pressure; comparing the equivalent pressure with a damage threshold value to obtain a safety margin, constructing a speed adjustment decision tree and generating a maximum allowable speed value of each road section; and dynamically generating a segmented variable-speed control instruction based on the speed decision matrix, and controlling a throttle valve and a braking system to cooperatively change speed. The method has the advantages of accurate working condition identification, dynamic fruit adaptation, closed-loop speed regulation and control and the like, and is suitable for fine speed control of a high-sensitivity fruit and vegetable transportation scene.

A vehicle thermal management system includes a compressor, a first internal heat exchanger, an external heat exchanger, a second internal heat exchanger, and an integrated module. The first internal heat exchanger communicates with the air outlet of the compressor. The external heat exchanger communicates with the first internal heat exchanger through a first pipeline, with the air inlet of the compressor through a second pipeline, and with the first internal heat exchanger through a third pipeline that is connected to a second throttle element. The second internal heat exchanger communicates with the external heat exchanger through a fourth pipeline that is connected to a first throttle element, and with the air inlet. The integrated module includes a part of the first pipeline, a part of the second pipeline, a part of the third pipeline, and a part of the fourth pipeline.

A redundant brake unit for a motor vehicle comprises: an inlet port configured to receive fluid under pressure from an external source; an outlet port connected to a supply passage and configured for fluid connection to a wheel brake; a reservoir port connected to a return passage and configured for fluid connection to a fluid reservoir; a boost valve configured to selectively control fluid communication between the inlet port and the supply passage; and a pressure supply unit including a pump element configured to pump fluid between the return passage and the supply passage. The pump element has an inlet directly connected to the reservoir port with no actuated valves therebetween. A normally-closed valve and a throttle valve are disposed in a series configuration between the supply passage and the return passage, with the throttle valve being operable to control a fluid pressure in the supply passage.

The invention belongs to the technical field of automobile suspensions, and particularly relates to a gas damping independent air spring which comprises a base, an air bag, a piston and a protective cylinder. The open end of the piston is connected with the upper end of the air bag; the piston is provided with a partition plate dividing the gas containing cavity into a main gas chamber and an auxiliary gas chamber, the main gas chamber is located on the side, close to the gas bag, of the partition plate, and the auxiliary gas chamber is located in the piston cavity. A compression throttling hole and a stretching throttling hole which are communicated with the main air chamber and the auxiliary air chamber are formed in the partition plate; a first elastic valve plate for sealing the compression throttling hole is arranged in the auxiliary air chamber, and a second elastic valve plate for sealing the stretching throttling hole is arranged in the main air chamber. The pressure difference between the main air chamber and the auxiliary air chamber is used for controlling opening and closing of the compression throttling hole and the stretching throttling hole, so that effective air containing cavities of the air spring are rapidly switched, and the rigidity of the air spring is adjusted in time. The air flow is limited through the compression throttling hole and the stretching throttling hole, and damping force is provided for the telescopic movement of the air spring.

The invention discloses a hydraulic system and equipment for testing a hydraulic valve, and belongs to the technical field of hydraulic systems. An oil inlet of the hydraulic pump is connected with the oil tank; the tested valve comprises a plurality of inlets and outlets; one oil way of an oil outlet of the hydraulic pump is connected with the pressure regulating oil way, and the other oil way is connected with an oil inlet of the cartridge check valve; the pressure adjusting oil way adjusts the oil outlet pressure of the hydraulic pump; one oil way inserted into the oil outlet of the one-way valve is connected with a control oil way; the control oil way is used for adjusting the on-off and pressure of control oil of the tested valve; the other oil way is connected with an oil inlet of a proportional speed regulating valve, an oil outlet of the proportional speed regulating valve is connected with an oil inlet of a plug-in mounting type direction valve group, an oil outlet of the plug-in mounting type direction valve group is connected with an inlet of a tested valve, and a control cavity of the plug-in mounting type direction valve group is connected with an electromagnetic directional valve; an outlet of the tested valve is connected with the hydraulic cylinder and the throttling oil way. The hydraulic valve testing device can be suitable for testing high-pressure environments of various types of hydraulic valves.

The invention relates to the field of aero-engine bearing cavity structure system testing, and particularly provides an aero-engine bearing cavity inner lubricating oil flow state measuring system which comprises a test piece main body simulating an aero-engine bearing cavity, an oil gas supply and recovery system and a control system. The test piece main body comprises a rotor test piece and a stator test piece which are connected together, and the oil gas supply and recovery system comprises an oil supply system, a gas supply system, an oil return pool and an oil gas separation pump. The control system comprises a controller, and an oil supply throttle valve, an air supply throttle valve, an exhaust throttle valve, a test data acquisition assembly and a test piece main body driving device which are in signal connection with the controller. On the basis of the method, the lubricating oil-air flowing state in the bearing cavity can be monitored and evaluated in real time, and test support can be provided for follow-up bearing cavity optimization design.

The invention discloses a pressure feedback type damping self-adjusting energy feedback oil gas suspension and a working method, and belongs to the field of vehicle oil gas suspensions. The pressure feedback type damping self-adjusting energy feedback oil gas suspension comprises a first-stage small-range damping multi-stage adjuster, a second-stage large-range damping multi-stage adjuster and a one-way energy feedback and energy recovery system, an oil outlet of the first-stage small-range damping multi-stage regulator is connected with an oil inlet of the one-way energy feedback and energy recovery system through an oil inlet pipe, an oil outlet of the one-way energy feedback and energy recovery system is connected with an oil inlet of the first-stage small-range damping multi-stage regulator through an oil return pipe, and a throttling valve is arranged on the oil inlet pipe. And pipelines at the two ends of the two-stage large-range damping multi-stage regulator are arranged on the two sides of the throttle valve on the oil inlet pipe in parallel. The working number of damping holes of the suspension system can be changed, self-adaptive adjustment of damping of the suspension system under the condition that the stroke is changed is achieved, power equipment is not needed, and automatic damping adjustment can be achieved through a mechanical structure. And damping vibration attenuation energy consumption recovery is realized.

The invention discloses a supercharging optimization control method based on ignition efficiency, which comprises the following steps of: periodically detecting a supercharging closed-loop enabling condition for an engine, and when the state of the engine is changed from a state meeting the supercharging closed-loop enabling condition to a state not meeting the supercharging closed-loop enabling condition, starting the ignition efficiency; according to the ratio of the actual outlet pressure to the actual inlet pressure of the throttle valve and the current real-time rotating speed of the engine, the initial duration value when the target opening degree of the supercharging actuator is kept unchanged is determined; determining remaining time according to the duration initial value, and updating and optimizing the remaining time according to the ignition angle efficiency variable quantity to obtain optimized remaining time; and the optimized remaining time serves as the maintaining time of the opening degree of the pressurization actuator through pressurization closed-loop enabling, and the pressurization process is controlled according to the maintaining time. According to the method, the problems of control smoothness and stability possibly caused when the pressurization closed loop is quitted are optimized, and the stability of the air inlet pressure and the pressure of an outlet of the supercharger in the quitting process of the pressurization closed loop is improved.

The invention relates to the technical field of temperature and pressure reduction, and provides a temperature and pressure reducer provided with a rapid limiting structure and convenient to install, which comprises a valve body, a temperature and pressure reducing mechanism, a temperature and pressure reducing mechanism, a pressure reducing mechanism and a pressure reducing mechanism, and is characterized in that the valve body comprises a main valve module and a pilot valve module; the main valve clack rotates and moves up and down according to the pressure, the number of the throttling holes facing the steam inlet is changed, the size of the throttling holes facing the steam inlet is adjusted, and output steam is more stable and more accurate; desuperheating water is input into the main valve clack through the flow guide pipe through the booster pump and sprayed into high-pressure steam flowing in from the steam inlet through the spray head, so that the desuperheating water and the high-pressure steam are mixed more evenly, and the atomization effect is improved. The sliding sleeve is driven by the main valve clack to move downwards, the nozzle area of the spray head is reduced, and therefore the amount of attemperation water is rapidly reduced, rapid limiting is achieved, and the situation that due to excessive attemperation water, evaporation is incomplete, temperature adjustment is inaccurate, and the attemperation effect is affected is prevented.

The invention discloses a surge valve control method and device, electronic equipment and a vehicle, relates to the field of engines, and aims to determine whether an engine is in a target working condition representing that a supercharger is liable to have a surge phenomenon or not. And on the basis of determining that the engine is in the target working condition, according to the intensity of the change of the operation state of the engine under the target working condition, when the engine is determined to be in a relatively strong transient working condition, whether a surge valve is opened or not is determined in time in combination with the opening degree of a throttle valve. And when it is determined that the surge valve is not opened, whether the surge valve is opened or not is further determined according to the air inlet flow of the engine and the opening degree of the throttle valve. Whether the surge valve is opened or not is judged according to the target working condition, the strong transient working condition and the surge flow of the engine in sequence, the multiple working conditions and operation conditions of the engine are synthesized, the opening condition of the surge valve is more accurately determined, the situation that the surge valve is opened abnormally can be effectively reduced, and therefore the situation that power of the engine is insufficient is effectively reduced.

The invention provides a direct connection type P1 hybrid commercial vehicle gear shifting coordination control method and device and a vehicle. The method comprises the steps that a vehicle gear shifting request is received, assembly torque reduction is achieved through an engine and a motor, and a gearbox is made to reverse to a neutral gear; the rotating speed of the power assembly is adjusted through an engine and a motor according to the vehicle operation condition and the gear shifting time, so that the rotating speeds of the clutch before and after gear shifting are synchronous; and an assembly torque returning request is received, and the output torque of the engine and the output torque of the motor are dynamically distributed according to the accelerator response characteristic curve. The torque response speed can be increased, rotating speed overshoot and clutch contact impact are avoided, the torque returning speed is increased, and the dynamic property and comfort of a vehicle are improved.

A solenoid includes a first fixed iron core and a second fixed iron core located on a first end side and a second end side of an axial direction of a coil, a first movable iron core and a second movable iron core located therebetween and attracted by the first fixed iron core and the second fixed iron core by passage of current through the coil, respectively, a spring housed in a spring chamber formed on the first fixed iron core side of the first movable iron core and biasing the first movable iron core to the second fixed iron core side, a leaf spring that regulates movement of the first movable iron core to the second fixed iron core side with respect to the second movable iron core, and a throttle passage that causes the spring chamber to communicate with outside.

The invention relates to the field of vehicle driving motor control, and particularly discloses a wheel side driving motor working state control method and device, and the method comprises the steps: obtaining the instantaneous whole vehicle demand torque according to the real-time accelerator pedal opening degree and the real-time vehicle speed; according to the road gradient and the real-time vehicle speed, the whole vehicle demand torque is predicted; the minimum value of the instantaneous whole vehicle demand torque and the predicted whole vehicle demand torque is taken as the actual whole vehicle demand torque; and controlling the working state of the driving motor according to the actual vehicle demand torque. According to the method, unreasonable driving of a driver is restrained, the actual whole vehicle demand torque is determined by calculating and predicting the whole vehicle demand torque and combining the instantaneous whole vehicle demand torque, power demands of the vehicle under different road conditions and loads are matched, insufficient or excessive power is avoided, the vehicle runs more smoothly, the safety of vehicle driving is improved, and the driving safety of the vehicle is improved. Overload of vehicle mechanical parts is avoided, the service life of the vehicle mechanical parts is prolonged, the working state of the driving motor is reasonably controlled, and energy consumption and vehicle operation cost are reduced.

A thermal management system includes a refrigerant loop system that includes a compressor, a refrigerant four-way reversing valve, a plate heat exchanger, a throttle valve, another plate heat exchanger, and a gas-liquid separator, to form a refrigerant loop, and a motor liquid cooling loop system includes a motor liquid cooling loop that circulates coolant through a motor, and a pipe in the motor liquid cooling loop is connected to a liquid cooling channel in the plate heat exchanger to exchange heat with the refrigerant loop system using the plate heat exchanger.

One variation of a system for generating thrust at an aerial vehicle includes: a primary electric motor; a rotor coupled to the motor; an internal-combustion engine; a clutch interposed between the motor and an output shaft of the internal-combustion engine; an engine shroud defining a shroud inlet between the rotor and the internal-combustion engine, extending over the internal-combustion engine, and defining a shroud outlet opposite the rotor; a cooling fan coupled and configured to displace air through the engine shroud; and a local controller configured to receive a rotor speed command specifying a target rotor speed, adjust a throttle setpoint of the internal-combustion engine according to the target rotor speed and a state of charge of a battery in the aerial vehicle, and drive the primary electric motor to selectively output torque to the rotor and to regeneratively brake the rotor according to the target rotor speed.

The invention relates to the technical field of industrial production equipment, in particular to a long-distance moving air floating guide rail system. The long-distance moving air floating guide rail system comprises a sliding block installed on a guide rail, the guide rail is provided with a plurality of air channels and air paths connected with an air supply pipeline, a set of air outlet holes are formed in the portion, corresponding to each air path, between the guide rail and the sliding block and connected with the air paths, and air flows out of the air outlet holes to form an air film; the top end of the air throttle is fixed to the side wall of the guide rail, the inner wall of the sliding block makes contact with the top end of the air throttle and presses downwards to open the air throttle, and the air throttle automatically rebounds and is closed after the sliding block leaves. According to the long-distance moving air floating guide rail system, the normally-closed air throttle is arranged on the air passage to control opening and closing of the air passage, the air throttle is extruded to be opened through movement of the sliding block, the air throttle can be opened and closed at any time according to movement of the sliding block, and the influence of delay of an induction equipment control system is avoided while the air consumption is reduced; extra wiring work is not needed, the structure is simple, and the installation workload is small.

The invention discloses a pinch roll pneumatic control system and process in a high-speed wire rod rolling process. A high-speed wire rod sequentially enters a reducing mill unit, a water tank, a pinch roll and a silking machine along a rolling center line; a pinch roll cylinder is arranged on the pinch roll and is used for adjusting the clamping force and the size of a roll gap; and a connecting pipeline of the pinch roll cylinder is provided with a first stop valve, an air source triple piece, a second stop valve, a pneumatic proportioning valve, an electromagnetic valve and a throttle valve which are controlled by the PLC. The pinch roll can be suitable for most high-speed wire rod production lines, the clamping force of the pinch roll can be flexibly applied, the product requirements of different precisions are met, the roll gap in the pinch roll is easy and convenient to adjust, and the process combination application is flexible. The size cleaning performance of a final product is improved, the yield is improved, the accident post-treatment time in the area is shortened, the fault treatment time in the production process is shortened, the operation rate of a rolling mill is improved, and the income is increased.

The invention relates to the technical field of petroleum and natural gas production and transportation, and discloses a throttling device and a gas nozzle replacement method.The throttling device comprises a shell, an opening and closing piece movably arranged on the shell and a detachable throttling gas nozzle assembly, the shell is provided with a fluid channel and a detachable channel which are not communicated, and a hollow channel is formed in the opening and closing piece; the throttling air tap assembly is installed in the hollow channel, the opening and closing piece is provided with an opening position and a closing position, when the air tap needs to be replaced, the opening and closing piece can be switched to the closing position, the disassembling channel is communicated, the throttling air tap assembly is disassembled and moved out of the shell, and after replacement is completed, a new throttling air tap assembly is installed on the opening and closing piece. The opening and closing piece is switched to the opening position, the fluid channel is conducted, the throttling device continues to work, and the throttling effect on flowing fluid is achieved. According to the throttling device and the air tap replacement method, the air tap can be replaced without removing the pressure of pipelines before and after the throttling device, the replacement cost is reduced, and the replacement efficiency is improved.

The invention belongs to the technical field of shock absorbers, and particularly relates to a shock absorber with adjustable damping, a hydraulic damping adjusting device and an air pressure damping adjusting device are arranged on a shock absorber main body, the hydraulic damping adjusting device comprises a hydraulic adjusting end cover, and an adjusting cavity communicated with liquid of a hydraulic driving assembly is arranged on the hydraulic adjusting end cover. The adjusting cavity is in transmission connection with the throttling rod through a hydraulic push rod; the air pressure damping adjusting device comprises an air pressure piston in plunger fit in the damping adjusting cylinder, an air pressure cavity is formed between the air pressure piston and the damping piston, and the corresponding end of the damping adjusting cylinder is connected with an air pressure driving assembly. According to the hydraulic damping adjusting device, the throttling rod is driven to axially move in a hydraulic mode so as to adjust the flow area of the throttling channel, the problem that damping oil leaks in the prior art is effectively solved, and according to the air pressure damping adjusting device, the air pressure compression amount of the air pressure cavity is directly changed through axial movement of the air pressure piston; and the air pressure cavity does not need to be inflated and deflated.

An arrangement for operating a load-controlled hydraulic system of an agricultural tractor, includes a hydraulic pump generating a system pressure and having an actuating device to adjust a displacement volume, a hydrostatic vehicle steering system connected to the hydraulic pump and having a steering orbitrol and a first load-indicating pressure, a pressure-regulating valve connected upstream of the steering orbitrol and actuated via a pressure difference decreasing across a throttle element counter to a predetermined restoring force in accordance with the first load-indicating pressure, a second hydraulic consumer connected to the hydraulic pump and feeding a second load-indicating pressure back to a shuttle valve arrangement, which compares and transmits the respectively higher of the first and second load-indicating pressures to the actuating device to adjust the displacement volume, and a pressure-copying valve indirectly feeding back the first load-indicating pressure to the shuttle valve arrangement.

The present invention discloses a fuel cell throttle, which includes a throttle body, an inlet and outlet arranged on both sides of the throttle body, and two closed valves arranged in the throttle body, the two closed valves are arranged opposite to each other up and down, and the two closed valves are respectively connected with elastic reset parts; the fuel cell throttle also includes a driving mechanism for driving the two closed valves to open, and the output execution end of the driving mechanism can be connected to the two closed valves in a transmission manner. The fuel cell throttle proposed in the embodiment of the present invention can open the upper and lower closed valves by air pressure when the driving mechanism loses power or fails, so that air flows from the throttle inlet to the throttle outlet, thereby avoiding damage to the battery stack due to excessive pressure. In addition, the present invention also proposes a fuel cell system and a fuel cell vehicle.

A fuel injection system for an engine of a vehicle includes a throttle body and an elastomeric injection manifold coupled to the downstream end of the throttle body. The injection manifold defines a fuel injector socket. The fuel injection system also includes a fuel injector receivable by the fuel injector socket of the injection manifold and a fuel rail fluidly coupled to the fuel injector. The fuel rail supplies fuel to the fuel injector.

The invention discloses a vehicle control method and device, equipment and a storage medium, and relates to the technical field of vehicle control, and the method comprises the steps: obtaining the longitudinal acceleration data and vertical acceleration data of a vehicle when the vehicle is in a self-adaptive crawling condition; determining a user driving style according to the longitudinal acceleration data, and determining a road bumping level according to the vertical acceleration data; determining a target creeping speed according to the accelerator data and the brake data of the vehicle; and determining an increment torque function based on the target creeping speed, the road bumping level and the user driving style, and controlling the vehicle according to the increment torque function so as to maintain the creeping speed of the vehicle at the target creeping speed. The target crawling speed is determined according to the accelerator and brake data of the vehicle, and the incremental torque function is constructed based on the target crawling speed to control the vehicle, so that the crawling speed of the vehicle can meet the actual crawling requirement of a user as much as possible, the user operation is simplified, and the driving experience is improved.

The invention relates to a method and device for obtaining the actual supercharging pressure of an engine. The method comprises the steps that the air inlet pressure of an outlet of a throttle valve and the air inlet pressure of an inlet of the throttle valve are obtained; and judging whether the throttle valve is in a normal control mode, an anti-overshoot control mode or a full-open control mode, and for different modes, selecting corresponding transition coefficients to calculate the actual boost pressure of the engine by combining the intake pressure of the outlet of the throttle valve and the intake pressure of the inlet of the throttle valve. According to the method, on the basis of different working modes of the throttle valve, the boost pressure control deviation, the intake pressure control deviation and the intake pressure response condition are considered at the same time, the calculation method of the actual boost pressure is optimized, meanwhile, learning parameters of the actual boost pressure are continuously updated in different life cycles, and the control precision of the intake pressure is improved.

A method for controlling a marine drive having a throttle handle moveable to control a thrust and a detent engageable to resist moving the throttle handle. The method includes configuring a position sensor to generate position data corresponding to positions of the throttle handle and receiving the position data from the position sensor. The method further includes analyzing the position data to determine a first position of the throttle handle in which the detent disengages and generating thrust with the marine drive when the throttle handle is moved into the first position.

The invention discloses a testing device for an aircraft automatic throttle switch package assembly, which comprises a box body and a mounting frame mounted on the inner side of the box body, an operation panel is mounted at the top of the mounting frame, and a storage box is arranged at the left lower part of the mounting frame. A storage box cabin cover corresponding to the storage box is hinged to the top of the operation panel, and two test mounting folding frames are mounted on the storage box cabin cover; the testing device can be used for testing the automatic accelerator switch package assembly of the aircraft, is small in size, convenient to carry, safe, reliable and simple to operate, can be used for testing nine switches at the same time, is clear at a glance in testing state, and can be used for testing whether the switches are synchronous or not at the same time. And a digital multimeter can be externally connected to measure the contact resistance in each switch, so that the fault judgment accuracy of aircraft maintenance personnel and the precise adjustment of assembly correction are effectively improved, the maintenance quality and attendance rate of an aircraft are improved, and the maintenance cost is greatly reduced.

The utility model provides a rock drill impact hydraulic control valve group and a rock drill, the valve group comprises a hydraulic control reversing valve, a first throttling hole, an electric proportional overflow valve, an overflow valve, a second throttling hole, a valve body and an electromagnetic reversing valve, the valve body is provided with a pressure oil port P, an oil return port T, an oil drainage port L, an LS oil port and a working oil port A; the pressure oil port P is communicated with an oil inlet of the overflow valve and an oil inlet of the second throttling hole through a hole channel in the valve body. An oil outlet of the second throttling hole is communicated with an oil inlet of the electromagnetic reversing valve; a working oil port of the electromagnetic reversing valve is communicated with a control oil port of the hydraulic control reversing valve; the oil return port T is communicated with an oil outlet of the overflow valve; and the oil drainage port L is communicated with an oil drainage port of the electromagnetic reversing valve, and is communicated with an oil drainage port of the hydraulic control reversing valve, an oil outlet of the electric proportional overflow valve and a control oil port at the same time. Damage of pressure building to a system and elements is eliminated, and residual impact pressure existing after oil cut-off is eliminated.

Present embodiments related to throttle body fuel injection systems intended to replace existing carburetors. More specifically, present embodiments relate to retrofitting carbureted engines with electronic fuel injection (EFI) which may be mounted on a manifold of an internal combustion engine and have bores of differing sizes and other characteristics which allow operation of such arrangement.

A first mounting cavity, a second mounting cavity, a manual oil suction channel, an electric oil suction channel, a working port A and a working port B are formed in a valve block, a valve sleeve is mounted in the first mounting cavity, a first oil channel communicates with an oil tank through the manual oil suction channel, the first oil channel communicates with a second oil channel, and the second oil channel communicates with a second oil channel; a first check valve is arranged in the first oil channel, a manual pump assembly is arranged on the valve block, the electric oil suction channel is communicated with the second oil channel through a third oil channel, the motor pump assembly can drive oil in the oil tank to be pumped to the second oil channel through the electric oil suction channel and the third oil channel, a second check valve is arranged in the third oil channel, and a distribution shaft is arranged in the second installation cavity. The distribution shaft is provided with a first distribution oil channel and a second distribution oil channel which are arranged in an isolated mode, the second distribution oil channel is communicated with the working port A and the working port B in a switching mode through the distribution shaft, a throttling block is arranged in the second distribution oil channel, throttling holes are formed in the throttling block, and through the arrangement, the integration level and safety are higher.