Cylinder head air passage tumble flow testing device and testing method thereof

Abstract

The present invention relates to a cylinder head air duct tumble test device and a test method thereof. The test device includes an installation and adjustment component, a moving component, an air source and a measuring component. The installation and adjustment component has an installation and adjustment end, which is detachably connected to the cylinder head; the top of the moving component is used to place the cylinder liner; the air inlet and outlet ends of the air source are connected to the bottom end of the cylinder liner; the measuring end of the measuring component is arranged in the cylinder liner and / or the air source; the installation and adjustment component is arranged to drive the cylinder head to move to a position facing the cylinder liner in a vertical plane, and adjust the vertical angle of the cylinder head so that the center line of the cylinder hole to be tested in the cylinder head and the center line of the corresponding air inlet or air outlet cylinder hole are arranged horizontally. At this time, the moving component drives the cylinder liner to move to a position docking with the cylinder hole to be tested on the cylinder head, and the air source supplies or extracts air according to the air inlet and outlet types of the cylinder hole to be tested to simulate the airflow in the cylinder hole to be tested, and the measuring component measures the tumble intensity.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile engine testing, and in particular to a cylinder head air passage tumble flow testing device and a testing method thereof. Background Art

[0002] Tumble flow strength is the main performance indicator of the engine cylinder head intake duct, which is related to the engine's power performance, emission performance and economic performance. Therefore, it is necessary to conduct tumble flow testing on the engine cylinder head intake duct to ensure that the tumble flow strength is compatible with the engine cylinder head.

[0003] Tumble flow is a rotating flow of gas flowing from the engine's intake duct into the combustion chamber. To identify the rotational velocity of the gas flow, the test surface must be parallel to the rotational velocity plane, which is perpendicular to the direction of the intake duct. Therefore, the intake duct is perpendicular to the test surface. If the intake duct is perpendicular to the horizontal axis of the cylinder head, the test surface must also be perpendicular to the horizontal axis of the cylinder head, which often requires the cylinder head to be upright for testing.

[0004] Engine cylinder heads are heavy (especially heavy-duty ones, which weigh approximately 120 kg). Therefore, there is a lack of dedicated tumble flow testing equipment for fixing upright engine cylinder heads. Furthermore, due to the design structure of the engine cylinder head with different intake duct directions, it is difficult to adjust the vertical angle of the cylinder head, making the tumble flow testing process cumbersome. Summary of the Invention

[0005] In view of this, it is necessary to provide a cylinder head air duct tumble flow test device and a test method thereof to solve the problems of heavy weight of the engine cylinder head, lack of a dedicated tumble flow test device for fixing the upright engine cylinder head, and the design structure of different intake duct directions on the engine cylinder head, the inconvenience of adjusting the vertical angle of the cylinder head, and the cumbersome tumble flow test process.

[0006] On the one hand, the present invention provides a cylinder head air duct tumble flow testing device, including an installation and adjustment component, a moving component, an air source and a measuring component, wherein the installation and adjustment component has an installation and adjustment end, which is detachably connected to the cylinder head and is used to drive the cylinder head to move or rotate in a vertical plane; the top of the moving component is used to place the cylinder liner, and is used to drive the cylinder liner to move in a direction close to or away from the cylinder head; the air inlet and outlet ends of the air source are connected to the bottom end of the cylinder liner; the measuring end of the measuring component is arranged in the cylinder liner and / or the air source.

[0007] Furthermore, the installation and adjustment assembly includes a base, a supporting frame, a frame and a rotating mounting member, the base is vertically arranged, the supporting frame is slidingly connected to the base in the horizontal direction, the frame is slidingly connected to the supporting frame in the vertical direction, the rotating mounting member is rotatably connected to the frame along a horizontal axis perpendicular to the frame, and the rotating mounting member is connected to the cylinder head.

[0008] Furthermore, the installation and adjustment assembly also includes two straight-moving driving components, one of which is installed on the base and its output end is connected to the support frame to drive the support frame to slide in the horizontal direction, and the other straight-moving driving component is installed on the support frame and its output end is connected to the row frame to drive the row frame to move in the vertical direction.

[0009] Furthermore, the rotating mounting member includes a swivel, two fixed plates and two fixing members. The swivel is vertically arranged and rotatably connected to the frame. The two fixed plates are fixedly connected to the swivel. The two fixing members are respectively installed on the two fixed plates and form a clamping gap with the corresponding fixed base plates. The two sides of the cylinder head are respectively embedded in the two clamping gaps.

[0010] Furthermore, the installation adjustment assembly also includes a rotation adjustment part, which includes a gear ring, a gear, a turntable and a rotating shaft. One end of the rotating shaft is fixedly connected to the turntable, and the other end of the rotating shaft passes through the gear and is rotatably connected to the rack. The gear ring is provided on the outer wall of the rotating ring, and the gear ring is meshed with the gear.

[0011] Furthermore, the moving component includes a horizontal moving member and a vertical moving member, the output end of the horizontal moving member is connected to the vertical moving member, and is used to drive the vertical moving member to move in a direction perpendicular to the movement plane of the cylinder head, and the output end of the vertical moving member is connected to the cylinder liner, and is used to drive the cylinder liner to move in a vertical direction.

[0012] Furthermore, the air source includes a fan, an air duct and a pressure stabilizing cylinder. The fan is connected to the pressure stabilizing cylinder via the air duct. The pressure stabilizing cylinder is installed on the moving component. The bottom of the cylinder sleeve is connected to the top of the pressure stabilizing cylinder.

[0013] Furthermore, the measuring assembly includes a moment meter, a flow meter and a pressure sensor. The moment meter is installed between the cylinder liner and the pressure stabilizing cylinder, the flow meter is installed in the air duct, and the pressure sensor is installed in the cylinder liner.

[0014] Furthermore, the air duct is a corrugated tube.

[0015] On the other hand, the present invention further provides a cylinder head airway tumble flow testing method, which uses the cylinder head airway tumble flow testing device as described above, and includes the following steps:

[0016] The installation adjustment end of the installation adjustment component is connected to the cylinder head, and the vertical angle of the cylinder head is adjusted so that the center line of the cylinder hole to be tested and the center line of the corresponding intake or outlet cylinder hole are horizontally arranged;

[0017] The moving assembly drives the cylinder sleeve to move to the position where it docks with the cylinder hole to be tested;

[0018] The air source supplies or extracts air according to the air inlet and outlet types of the cylinder hole to be tested;

[0019] The measuring component detects the kinetic moment, flow rate and pressure of the gas in the airway and calculates the roller strength.

[0020] Compared with the existing technology: the installation and adjustment component is set up to drive the cylinder head to move to a position facing the cylinder liner in the vertical plane, and the vertical angle of the cylinder head is adjusted so that the center line of the cylinder hole to be tested in the cylinder head and the center line of the corresponding intake or outlet cylinder hole are set horizontally. At this time, the moving component drives the cylinder liner to move to a position where it docks with the cylinder hole to be tested on the cylinder head. The air source supplies or extracts air according to the inlet and outlet type of the cylinder hole to be tested to simulate the airflow in the cylinder hole to be tested, and the measuring component measures the tumble intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure of a cylinder head air duct tumble flow testing device provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of the adjustment assembly installed in the cylinder head air duct tumble flow testing device provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the arrangement of the cylinder liner relative to the mounting and adjusting assembly in a cylinder head air duct tumble flow testing device provided by an embodiment of the present invention;

[0024] Figure 4 This is a workflow diagram of the cylinder head air duct tumble flow testing method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0026] Since the engine cylinder head is heavy, especially the heavy-duty engine cylinder head, which is about 120kg, an embodiment of the present invention provides a cylinder head air duct tumble test device for fixing the cylinder head. At the same time, it can adjust the position of the cylinder head so that it can move to a position facing the cylinder liner. At the same time, when designing the structure of the intake duct direction on the cylinder head, it can drive the cylinder head to rotate to adjust its vertical angle, thereby improving the convenience of the roller test process. At the same time, an embodiment of the present invention also proposes a cylinder head air duct tumble test method. After adjusting the position of the cylinder head and the cylinder liner through the above-mentioned test device, the kinetic moment, flow rate and pressure information of the gas in the air duct can be obtained to calculate the roller strength in the engine cylinder head. Through the above-mentioned test, the engine cylinder head can be continuously optimized so that the roller strength inside it reaches the required value.

[0027] First, if Figure 1 As shown, a cylinder head air duct tumble flow testing device is provided in an embodiment of the present invention, including an installation and adjustment component 100, a moving component 200, an air source 300 and a measuring component 400. The installation and adjustment component 100 has an installation and adjustment end, which is detachably connected to the cylinder head M1 and is used to drive the cylinder head M1 to move or rotate in a vertical plane; the top of the moving component 200 is used to place the cylinder liner M2, and is used to drive the cylinder liner M2 to move in a direction close to or away from the cylinder head M1; the air inlet and outlet ends of the air source 300 are connected to the bottom end of the cylinder liner M2; the measuring end of the measuring component 400 is arranged in the cylinder liner M2 and / or the air source 300.

[0028] Among them, the installation and adjustment component 100 can drive the cylinder head M1 to move in the vertical plane to a position facing the cylinder liner M2, and adjust the vertical angle of the cylinder head M1 so that the center line of the cylinder hole to be tested on the cylinder head M1 and the center line of the corresponding intake or exhaust cylinder hole are set horizontally. At this time, the moving component 200 drives the cylinder liner M2 to move to a position where it docks with the cylinder hole to be tested on the cylinder head M1. The air source 300 supplies or extracts air according to the inlet and outlet type of the cylinder hole to be tested to simulate the airflow in the cylinder hole to be tested, and the measuring component 400 measures the tumble flow intensity.

[0029] The mounting and adjusting assembly 100 in this embodiment is used to securely connect to an upright cylinder head M1 and adjust the position and vertical angle of the cylinder head M1. Specifically, the mounting and adjusting assembly 100 includes a mounting and adjusting end that is detachably connected to the cylinder head M1 and is used to drive the cylinder head M1 to move or rotate within a vertical plane.

[0030] In one embodiment, the mounting and adjusting assembly 100 includes a base 110, a support frame 120, a rack 130 and a rotating mounting member 140. The base 110 is vertically arranged, the support frame 120 is slidingly connected to the base 110 in the horizontal direction, the rack 130 is slidingly connected to the support frame 120 in the vertical direction, the rotating mounting member 140 is rotatably connected to the rack 130 along a horizontal axis perpendicular to the rack 130, and the rotating mounting member 140 is connected to the cylinder head M1.

[0031] The base 110 is a vertically arranged frame structure, on which two parallel and horizontally arranged slide rails are fixedly connected, and the top and bottom of the support frame 120 are connected to the two slide rails via rollers.

[0032] At the same time, both sides of the support frame 120 are fixedly connected with vertically arranged guide rails, and both sides of the row frame 130 are slidably connected to the two guide rails via two sliders.

[0033] In order to facilitate driving the base 110 and the support frame 120 to slide, in one embodiment, the installation and adjustment assembly 100 also includes two straight-moving driving members 131, wherein one straight-moving driving member 131 is installed on the base 110 and its output end is connected to the support frame 120, so as to drive the support frame 120 to slide in the horizontal direction, and the other straight-moving driving member 131 is installed on the support frame 120 and its output end is connected to the row frame 130, so as to drive the row frame 130 to move in the vertical direction.

[0034] In this embodiment, the linear drive member 131, whose output end is connected to the support frame 120, uses a cylinder as a power source to drive the support frame 120 to slide. The linear drive member 131, whose output end is connected to the travel frame 130, uses a motor-screw structure as a power source to drive the travel frame 130 to slide. It is understood that the linear drive member 131 can also be implemented using a worm gear or other structure. The linear drive member 131 replaces manual force to push the support frame 120 and travel frame 130 to slide, thereby aligning the cylinder bore to be tested of the cylinder head M1 and the cylinder liner M2 in the same vertical plane.

[0035] like Figure 2 As shown, the above-mentioned rotating mounting member 140 is a structure for connecting the cylinder head M1 and driving the cylinder head M1 to rotate. In one embodiment, the rotating mounting member 140 includes a swivel 141, two fixed clamps 142 and two fixing members. The swivel 141 is vertically arranged and rotatably connected to the frame 130. The two fixed clamps 142 are fixedly connected to the swivel 141. The two fixing members are respectively installed on the two fixed clamps 142 and form a clamping gap between the corresponding fixed base plates. The two sides of the cylinder head M1 are respectively embedded in the two clamping gaps.

[0036] The swivel 141 in this embodiment is arranged on the side of the frame 130 away from the support frame 120. In order to realize the rotational connection between the swivel 141 and the frame 130, a plurality of outer guide wheels 144 and a plurality of inner guide wheels 145 are provided on the frame 130. The plurality of outer guide wheels 144 are evenly arranged along the circumference of the swivel 141 and slide in contact with the outer wall of the swivel 141. The plurality of inner guide wheels 145 are evenly arranged along the circumference of the swivel 141 and slide in contact with the inner wall of the swivel 141. In order to prevent the swivel 141 from moving in a direction away from the carriage 130 and causing it to deviate from the restriction of the outer guide wheel 144 and the inner guide wheel 145, in this embodiment, the swivel 141 includes a first ring body and a second ring body, and the first ring body and the second ring body are arranged and connected in sequence in the direction away from the carriage 130. The inner diameters of the first ring body and the second ring body are the same, and the outer diameter of the first ring body is larger than the outer diameter of the second ring body. The interaction force between the multiple outer guide wheels 144 and the second ring body, the outer guide wheel 144 and the first ring body can limit the conversion to move in the direction away from the carriage 130.

[0037] Because the cylinder head M1 is heavy, manual rotation of the swivel 141 is difficult. Therefore, in one embodiment, the mounting adjustment assembly 100 further includes a rotary adjustment member 143. The rotary adjustment member 143 includes a gear ring 143a, a gear 143b, a rotary disk 143c, and a rotating shaft. One end of the rotary shaft is fixedly connected to the rotary disk 143c, and the other end of the rotary shaft is rotatably connected to the carriage 130 through the gear 143b. The gear ring 143a is disposed on the outer wall of the swivel 141 and meshes with the gear 143b. Rotating the rotary disk 143c causes the meshing action of the gear 143b and the gear ring 143a to drive the swivel 141 to rotate. To prevent interference between the outer guide wheel 144 and the gear ring 143a, the gear ring 143a may be disposed on the first ring body.

[0038] It is understood that the installation and adjustment assembly 100 in this embodiment should include multiple locking members, the locking ends of which are respectively used to connect with the support frame 120, the travel frame 130, and the swivel 141 to limit the support frame 120, the travel frame 130, and the swivel 141 to their current positions. The locking members can be implemented using structures such as locking screws. For example, the locking screws are threadedly connected to the travel frame 130 and can be screwed to a position where they abut against the swivel 141 to limit the swivel 141 to its current position.

[0039] like Figure 3As shown, the aforementioned mounting and adjustment assembly 100 can be used to mount and rotate the upright cylinder head M1, thereby adjusting the position and vertical angle of the cylinder head M1 relative to the cylinder liner M2. After adjusting the position of the cylinder head M1, the position of the cylinder liner M2 needs to be adjusted. This is achieved in the embodiment of the present invention using the movable assembly 200. Specifically, the top portion of the movable assembly 200 is used to position the cylinder liner M2 and drive the cylinder liner M2 to move toward or away from the cylinder head M1.

[0040] In one embodiment, the moving assembly 200 includes a horizontal moving member 210 and a vertical moving member 220. The output end of the horizontal moving member 210 is connected to the vertical moving member 220, and is used to drive the vertical moving member 220 to move along a direction perpendicular to the movement plane of the cylinder head M1. The output end of the vertical moving member 220 is connected to the cylinder liner M2, and is used to drive the cylinder liner M2 to move in a vertical direction.

[0041] It is understandable that the horizontal moving member 210 and the vertical moving member 220 can be implemented using a structure similar to the linear driving member 131 , ie, a cylinder, a motor screw, and the like.

[0042] In this embodiment, the cylinder liner M2 simulates the intake structure of the engine cylinder head M1. It is L-shaped, with the bottom of the cylinder liner M2 extending vertically downward and connected to the air source 300. The top of the cylinder liner M2 extends horizontally and can be moved to a position that mates with the cylinder bore of the cylinder head M1. Specifically, the position of the cylinder liner M2 can be adjusted by moving the assembly 200. After the cylinder head M1 and cylinder liner M2 are connected, the air source 300 can be used to deliver or extract air according to the inlet and outlet air type of the cylinder bore to be tested. Specifically, the inlet and outlet ends of the air source 300 are connected to the bottom end of the cylinder liner M2.

[0043] In this embodiment, the gas source 300 includes a fan 310, an air duct 320 and a pressure-stabilizing cylinder 330. The fan 310 is connected to the pressure-stabilizing cylinder 330 via the air duct 320. The pressure-stabilizing cylinder 330 is installed on the moving component 200, and the bottom of the cylinder sleeve M2 is connected to the top of the pressure-stabilizing cylinder 330.

[0044] Among them, the fan 310 provides wind power to supply or extract air to the air duct 320. The air duct 320 connects the fan 310 and the pressure-stabilizing cylinder 330 to transmit the gas to the cylinder liner M2 or extract the gas from the cylinder liner M2. At the same time, the pressure-stabilizing cylinder 330 plays a buffering role in the airflow, making the gas flow stable.

[0045] It can be understood that the fan 310 is a structure that can be thought of by those skilled in the art, and no further explanation will be given here. The air duct 320 is a bellows, and in the process of the moving component 200 driving the cylinder sleeve M2 to move, the displacement difference between the pressure stabilizing cylinder 330 and the fan 310 is increased by the deformation of the air duct 320.

[0046] After establishing the working environment of the cylinder head M1 , the roller strength needs to be measured. In this embodiment, the measuring end of the measuring component 400 is disposed in the cylinder sleeve M2 and / or the gas source 300 .

[0047] In one embodiment, the measuring assembly 400 includes a moment meter 410, a flow meter 420 and a pressure sensor 430. The moment meter 410 is installed between the cylinder liner M2 and the pressure stabilizing cylinder 330, the flow meter 420 is installed in the air duct 320, and the pressure sensor 430 is installed in the cylinder liner M2.

[0048] The dynamic information of the gas in the airway is obtained through the moment meter 410, the flow information of the gas in the airway is obtained through the flow meter 420, and the pressure value of the gas in the airway is obtained through the pressure sensor 430. The roller strength is calculated based on the moment of momentum, flow and pressure of the gas in the airway.

[0049] like Figure 4 As shown, on the other hand, the present invention also provides a cylinder head airway tumble flow testing method, which uses the cylinder head airway tumble flow testing device as described above, and includes the following steps:

[0050] Step S100: Connect the mounting adjustment end of the mounting adjustment assembly to the cylinder head, and adjust the vertical angle of the cylinder head so that the center line of the cylinder hole to be tested and the center line of the corresponding intake or outlet cylinder hole are horizontally arranged;

[0051] Step S200: The moving assembly drives the cylinder sleeve to a position where it docks with the cylinder hole to be tested;

[0052] Step S300: The air source supplies or extracts air according to the air inlet and outlet types of the cylinder hole to be tested;

[0053] Step S400: The measuring component detects the momentum, flow rate and pressure of the gas in the airway and calculates the roller strength.

[0054] Compared with the prior art: the installation and adjustment component 100 is set up to drive the cylinder head M1 to move to a position facing the cylinder liner M2 in the vertical plane, and adjust the vertical angle of the cylinder head M1 so that the center line of the cylinder hole to be tested in the cylinder head M1 and the center line of the corresponding intake or exhaust cylinder hole are set horizontally. At this time, the moving component 200 drives the cylinder liner M2 to move to a position docking with the cylinder hole to be tested on the cylinder head M1. The air source 300 supplies or extracts air according to the inlet and outlet type of the cylinder hole to be tested to simulate the airflow in the cylinder hole to be tested, and the measuring component 400 measures the tumble intensity.

[0055] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A cylinder head airway tumble flow test device, characterized in that: include: A mounting adjustment assembly having a mounting adjustment end, the mounting adjustment end being detachably connected to the cylinder head and used to drive the cylinder head to move or rotate in a vertical plane; A moving assembly, the top of which is used to place the cylinder liner and drive the cylinder liner to move toward or away from the cylinder head; An air source, the air inlet and outlet of which are connected to the bottom end of the cylinder sleeve; a measuring assembly, a measuring end of which is disposed in the cylinder liner and / or the gas source; The mounting and adjusting assembly includes a base, a support frame, a frame and a rotating mounting member, wherein the base is vertically arranged, the support frame is slidably connected to the base in a horizontal direction, the frame is slidably connected to the support frame in a vertical direction, the rotating mounting member is rotatably connected to the frame along a horizontal axis perpendicular to the frame, and the rotating mounting member is connected to the cylinder head; The rotating mounting member includes a swivel, two fixed clamping plates and two fixing members. The swivel is vertically arranged and rotatably connected to the frame. The two fixed clamping plates are fixedly connected to the swivel. The two fixing members are respectively mounted on the two fixed clamping plates and form a clamping gap between the two fixed base plates. The two sides of the cylinder head are respectively clamped in the two clamping gaps. The mounting adjustment assembly further includes a rotation adjustment member, which includes a gear ring, a gear, a turntable, and a rotating shaft. One end of the rotating shaft is fixedly connected to the turntable, and the other end of the rotating shaft passes through the gear and is rotatably connected to the rack. The gear ring is provided on the outer wall of the turntable and is meshed with the gear. The air source includes a fan, an air duct and a pressure stabilizing cylinder. The fan is connected to the pressure stabilizing cylinder via the air duct. The pressure stabilizing cylinder is installed on the moving assembly. The bottom of the cylinder sleeve is connected to the top of the pressure stabilizing cylinder. The measuring assembly includes a moment meter, a flow meter and a pressure sensor. The moment meter is installed between the cylinder sleeve and the pressure stabilizing cylinder. The flow meter is installed in the air duct. The pressure sensor is installed in the cylinder sleeve.

2. The cylinder head airway tumble flow testing device according to claim 1, characterized in that: The installation and adjustment assembly also includes two straight-moving driving components, one of which is installed on the base and its output end is connected to the support frame to drive the support frame to slide in the horizontal direction, and the other straight-moving driving component is installed on the support frame and its output end is connected to the row frame to drive the row frame to move in the vertical direction.

3. The cylinder head airway tumble flow testing device according to claim 1, characterized in that: The moving assembly includes a horizontal moving member and a vertical moving member. The output end of the horizontal moving member is connected to the vertical moving member to drive the vertical moving member to move in a direction perpendicular to the movement plane of the cylinder head. The output end of the vertical moving member is connected to the cylinder liner to drive the cylinder liner to move in a vertical direction.

4. The cylinder head airway tumble flow testing device according to claim 1, characterized in that: The air duct is a corrugated tube.

5. A cylinder head airway tumble flow test method, characterized in that: The cylinder head airway tumble flow testing device according to any one of claims 1 to 4 is used, comprising the following steps: The installation adjustment end of the installation adjustment component is connected to the cylinder head, and the vertical angle of the cylinder head is adjusted so that the center line of the cylinder hole to be tested and the center line of the corresponding intake or outlet cylinder hole are horizontally arranged; The moving assembly drives the cylinder sleeve to move to the position where it docks with the cylinder hole to be tested; The air source supplies or extracts air according to the air inlet and outlet types of the cylinder hole to be tested; The measuring component detects the kinetic moment, flow rate and pressure of the gas in the airway and calculates the roller strength.

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