A device, method and vehicle for eliminating idle knock in a dual mass flywheel

Abstract

The application discloses a device, a method and an automobile for eliminating idle speed knocking of a dual-mass flywheel. The dual-mass flywheel comprises a primary flywheel and a secondary flywheel. The primary flywheel is connected with a crankshaft of an engine. The device comprises a variable load mechanism connected with the secondary flywheel through a clutch and used for changing the load of the dual-mass flywheel. The device for eliminating idle speed knocking of the dual-mass flywheel does not need to change the hardware such as the dual-mass flywheel and a transmission. The variable load mechanism cooperates with the clutch to increase the load of the dual-mass flywheel in an idle speed state, reduce the vibration of the dual-mass flywheel, and further reduce or even eliminate the knocking sound generated between the inner spline of the flywheel and the outer spline of the clutch of the dual-mass flywheel in the idle speed state.

Description

Technical Field

[0001] This invention belongs to the field of dual-mass flywheel technology, and more specifically, relates to a device, method, and automobile for eliminating idling knocking of dual-mass flywheels. Background Technology

[0002] Most mid-to-high-end sedans currently install a dual-mass flywheel between their engine crankshaft and transmission to effectively isolate and attenuate engine torsional vibrations, significantly improving overall vehicle comfort. The dual-mass flywheel mainly consists of a primary flywheel and a secondary flywheel, connected by springs and dampers. The engine crankshaft and primary flywheel are bolted together to transmit engine torque. Springs transmit the torque from the primary flywheel to a force transmission plate, which is bolted to the secondary flywheel. The internal splines of the secondary flywheel are connected to the external splines of the dual-clutch transmission with a clearance fit, thus transmitting engine torque to the transmission via the dual-mass flywheel. The dual-mass flywheel needs to be well-matched to the characteristics of the engine and transmission to effectively isolate and attenuate engine torsional vibrations; otherwise, various abnormal noises and sounds will occur, leading to customer complaints. The most common problem is a knocking sound produced between the internal splines of the flywheel and the external splines of the clutch at idle speed.

[0003] Current technologies primarily focus on suppressing the knocking noise generated between the internal splines of the flywheel and the external splines of the clutch at idle speed by adjusting parameters such as the damping torque, free rotation angle, and spline fit clearance between the dual-mass flywheel and the dual clutch. These methods all involve modifications to hardware components such as the dual-mass flywheel and the dual clutch, requiring significant manpower and financial investment. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and solve the problem of knocking noise that occurs between the internal splines of the flywheel and the external splines of the clutch during idling in existing dual-mass flywheels.

[0005] To achieve the above objectives, the present invention provides a device for eliminating idling knocking of a dual-mass flywheel. The dual-mass flywheel includes a primary side flywheel and a secondary side flywheel. The primary side flywheel is connected to the crankshaft of an engine. The device includes a variable load mechanism connected to the secondary flywheel via a clutch for changing the load on the dual-mass flywheel.

[0006] Optionally, the variable load mechanism includes an oil pump and a hydraulic valve body assembly. One end of the oil pump is connected to the secondary flywheel via the clutch, and the other end is connected to the hydraulic valve body assembly. The hydraulic valve body assembly controls the output force of the oil pump, thereby changing the load on the dual-mass flywheel.

[0007] Optionally, a drive gear is provided on the drive shaft of the clutch, and a driven gear is provided on the drive shaft of the oil pump, the driven gear meshing with the drive gear.

[0008] Optionally, the hydraulic valve body assembly includes a three-position three-way valve and a drive mechanism, the drive mechanism being used to drive the three-position three-way valve to change position, the three-position three-way valve including: The oil inlet, the first oil outlet, and the second oil outlet are provided. The oil inlet is connected to the output end of the oil pump. The first oil outlet is connected to a second oil tank. The second oil outlet can be connected to a cooling and lubrication valve, a clutch control valve, a shift control valve, and / or a parking control valve via an oil outlet pipe. The first chamber block seals the oil inlet, the first oil outlet, and the second oil outlet; The second cavity block connects the oil inlet and the second oil outlet, and closes the first oil outlet; The third cavity block connects the oil inlet, the first oil outlet, and the second oil outlet.

[0009] Optionally, the drive mechanism includes: The first hydraulic mechanism and the second hydraulic mechanism are respectively connected to both ends of the valve core of the three-position three-way valve, and are used to drive the three-position three-way valve to change position; The two-position three-way valve includes a first port, a second port, and a third port. The first port is connected to a first oil tank, the third port is connected to the first hydraulic mechanism, and the second hydraulic mechanism is connected to the oil pump. The left-position chamber of the two-position three-way valve is connected to the second port and the third port; The right-side chamber of the two-position three-way valve is connected to the first port and the third port.

[0010] Optionally, it also includes: The first damping orifice is disposed on the pipeline between the oil pump and the first hydraulic mechanism; The second damping orifice is disposed on the pipeline between the third port and the second hydraulic mechanism; The third damping orifice is provided on the oil outlet pipe; The first oil filter is disposed on the pipeline between the third port and the second damping orifice; A second oil filter is installed on the pipeline between the oil pump and the first port; A make-up oil pump is connected to the oil pump.

[0011] This invention provides a method for eliminating idling knocking in a dual-mass flywheel, and an apparatus for eliminating idling knocking in a dual-mass flywheel as described above, comprising: The secondary side flywheel connects the variable load mechanism and the dual-mass flywheel; Adjust the load interference resistance to change the load on the dual-mass flywheel.

[0012] Optionally, the secondary flywheel connecting the variable load mechanism and the dual-mass flywheel includes: When the clutch is engaged, the oil pump is connected to the dual-mass flywheel drive.

[0013] Optionally, the adjustment of load interference resistance includes: Operate the hydraulic valve body assembly to control the two-position three-way valve to switch the three-position three-way valve to the first and second positions, adjust the output force / torque of the oil pump, and thus change the load on the dual-mass flywheel.

[0014] The present invention provides an automobile including the above-described device for eliminating idling knocking of a dual-mass flywheel.

[0015] This invention provides a device for eliminating idle knocking of a dual-mass flywheel, the beneficial effects of which are: The device for eliminating idling knocking of the dual-mass flywheel does not require any changes to the hardware such as the dual-mass flywheel and the transmission. By using a variable load mechanism in conjunction with the clutch, the load on the dual-mass flywheel is increased in the idling state, reducing the vibration of the dual-mass flywheel, thereby reducing or even eliminating the knocking sound generated between the internal splines of the flywheel and the external splines of the clutch when the dual-mass flywheel is idling.

[0016] This device for eliminating idling knocking of the dual-mass flywheel changes the load on the dual-mass flywheel by altering the lubricating oil pressure of the oil pump. It also adjusts the load using a two-position three-way valve and a three-position three-way valve in conjunction with the oil pump. It is simple to use, has minimal impact on the vehicle after modification, and is low in cost.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0019] Figure 1 A schematic diagram of a device for eliminating idling knocking of a dual-mass flywheel according to an embodiment of the present invention is shown.

[0020] Explanation of reference numerals in the attached figures: 1. Engine; 2. Crankshaft; 3. Dual-mass flywheel; 31. Primary side flywheel; 32. Secondary side flywheel; 4. Clutch; 5. Drive gear; 6. Transmission shaft; 7. Drive shaft; 8. Driven gear; 9. Oil pump; 10. Hydraulic valve body assembly; 101. First damping orifice; 102. Three-position three-way valve; 103. First oil tank; 104. First oil filter; 105. Two-position three-way valve; 106. Second oil filter; 107. Second damping orifice; 108. Third damping orifice; 109. Second oil tank; 110. Make-up oil pump; 111. Cooling and lubrication valve; 112. Clutch control valve; 113. Shift control valve; 114. Parking control valve. Detailed Implementation

[0021] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0022] like Figure 1 As shown, a device for eliminating idling knocking of a dual-mass flywheel is disclosed. The dual-mass flywheel 3 includes a primary side flywheel 31 and a secondary side flywheel 32. The primary side flywheel 31 is connected to the crankshaft 2 of an engine 1. The device includes a variable load mechanism connected to the secondary flywheel via a clutch to change the load on the dual-mass flywheel.

[0023] Specifically, by changing the load on the flywheel through a variable load mechanism, the flywheel is prevented from spinning freely at idle, thereby reducing the knocking between the internal splines of the flywheel and the external splines of the clutch.

[0024] In this embodiment, the variable load mechanism includes an oil pump 9 and a hydraulic valve body assembly 10. One end of the oil pump 9 is connected to the secondary flywheel via a clutch 4, and the other end is connected to the hydraulic valve body assembly 10. The hydraulic valve body assembly 10 controls the output force of the oil pump 9, thereby changing the load on the dual-mass flywheel 3.

[0025] Specifically, the oil pump 9 is connected to the secondary side flywheel 32 of the dual-mass flywheel 3 through a clutch mechanism. In the idling state, the rotational resistance of the oil pump 9 is changed by changing the oil pressure of the oil pump 9, thereby increasing the output force / torque of the oil pump 9 to the dual-mass flywheel 3, thereby increasing the load on the dual-mass flywheel 3 and reducing the noise of the dual-mass flywheel 3 idling knocking.

[0026] In this embodiment, a drive gear 5 is provided on the drive shaft 6 of the clutch 4, and a driven gear 8 is provided on the drive shaft 7 of the oil pump 9. The driven gear 8 meshes with the drive gear 5.

[0027] Specifically, the oil pump 9 and clutch 4 are gear-driven.

[0028] In this embodiment, the hydraulic valve body assembly 10 includes a three-position three-way valve 102 and a drive mechanism. The drive mechanism is used to drive the three-position three-way valve 102 to change position. The three-position three-way valve 102 includes: The oil inlet, the first oil outlet, and the second oil outlet are connected to the output end of the oil pump 9. The first oil outlet is connected to the second oil tank 109. The second oil outlet can be connected to the cooling and lubrication valve 111, the clutch control valve 112, the shift control valve 113, and / or the parking control valve 114 through the oil outlet pipe. The first chamber block seals the oil outlet, the first oil outlet, and the second oil outlet; The second cavity block connects the oil inlet and the second oil outlet, and closes the first oil outlet; The third cavity block connects the oil inlet, the first oil outlet, and the second oil outlet.

[0029] Specifically, the three-position three-way valve 12 is a regulating valve (MPSV). After the clutch 4 is closed, the dual-mass flywheel 3 drives the oil pump 9 to rotate, and the oil pump 9 outputs lubricating oil with a certain pressure and flow rate. When the three-position three-way valve 102 is in the first position, it is in the initial position; when it is in the starting and operating state, it is in the second position. When the three-position three-way valve 102 is in the second position, the oil pump 9 is connected to the output pipeline through the oil inlet and the second oil outlet. When the three-position three-way valve 102 is in the third position, the oil pump 9 is connected to the output pipeline through the oil inlet and the second oil outlet, and is connected to the second oil tank 109 through the oil inlet and the first oil outlet.

[0030] In this embodiment, the driving mechanism includes: The first hydraulic mechanism and the second hydraulic mechanism are respectively connected to the two ends of the valve core of the three-position three-way valve 102, and are used to drive the three-position three-way valve 102 to change position; The two-position three-way valve includes a first port, a second port, and a third port. The first port is connected to the first oil tank 103, the third port is connected to the first hydraulic mechanism, and the second hydraulic mechanism is connected to the oil pump 9. The left-side chamber of the two-position three-way valve connects the second port and the third port; The right-side chamber of the two-position three-way valve connects the first port and the third port.

[0031] Specifically, the two-position three-way valve is a solenoid valve (MPCV), used to cooperate with the first hydraulic mechanism and the second hydraulic mechanism to switch the three-position three-way valve 102; The two-position three-way valve is in the left position. The oil pump 9 is connected to the second hydraulic mechanism and the first hydraulic mechanism through the second port and the third port. By adjusting the current of the two-position three-way valve, the hydraulic pressure of the first hydraulic mechanism and the second hydraulic mechanism is made to generate a difference, thereby driving the three-position three-way valve 102 to switch positions. The two-position three-way valve is in the right position. The oil pump 9 is connected to the second hydraulic mechanism. The first hydraulic mechanism is connected to the first oil tank 103 through the first port and the third port to release pressure.

[0032] Furthermore, the first hydraulic mechanism and the second hydraulic mechanism are piston-type structures. The three-position three-way valve 102 is driven to switch positions through the cooperation of the first hydraulic mechanism and the second hydraulic mechanism. During the switching, the pistons of the first hydraulic mechanism and the second hydraulic mechanism move in the same direction, and the two-position three-way valve ensures that the normal position is the left position through the elastic mechanism.

[0033] Furthermore, a hydraulic sensor is connected to the third output end to monitor the output signal and pressure value; Or it can directly act on the valve core of a two-position three-way valve to drive the two-position three-way valve to automatically switch the first position of the three-position three-way valve 102 to the second position.

[0034] In this embodiment, it also includes: The first damping orifice 101 is provided on the pipeline between the oil pump 9 and the first hydraulic mechanism; The second damping orifice 107 is disposed on the pipeline between the third port and the second hydraulic mechanism; The third damping orifice 108 is located on the oil outlet pipe; The first oil filter 104 is installed on the pipeline between the third port and the second damping orifice 107; The second oil filter 106 is installed on the pipeline between the oil pump 9 and the first port; Oil pump 110 is connected to oil pump 9.

[0035] Specifically, the oil filter protects the two-position three-way valve to prevent blockage, reduces the speed of the lubricating oil in the pipeline, balances the pressure, and replenishes the lubricating oil through the oil replenishment pump 110, while also providing emergency pressure boosting.

[0036] This embodiment provides a method for eliminating idling knocking of a dual-mass flywheel 3, and the apparatus for eliminating idling knocking of the dual-mass flywheel 3 described above includes: A secondary side flywheel 32 connecting the variable load mechanism and the dual-mass flywheel 3; Adjust the load interference resistance to change the load on the dual-mass flywheel 3.

[0037] In this embodiment, the secondary side flywheel 32 connecting the variable load mechanism and the dual-mass flywheel 3 includes: The clutch 4 is closed, and the oil pump 9 is connected to the dual-mass flywheel 3 for transmission.

[0038] In this embodiment, adjusting the load interference resistance includes: Operate the hydraulic valve body assembly 10 to control the two-position three-way valve to switch the first position to the second position of the three-position three-way valve 102, adjust the output force / torque of the oil pump 9, and thus change the load of the dual-mass flywheel 3.

[0039] This embodiment provides an automobile, including the above-described device for eliminating idle knocking of the dual-mass flywheel 3.

[0040] When using the device for eliminating idling knocking of the dual-mass flywheel 3 in this embodiment, taking the vehicle idling as an example... In the initial state, the two-position three-way valve is in the left position, and the three-position three-way valve 102 is in the first position. By adjusting the current of the two-position three-way valve (for NH type solenoid valves, decrease the current; for NL type solenoid valves, increase the current), the pressure of the first hydraulic drive mechanism and the second hydraulic drive mechanism are changed, thereby switching the three-position three-way valve 102 to the second working position. When clutch 4 is engaged, the dual-mass flywheel 3 drives oil pump 9 to rotate, and oil pump 9 outputs lubricating oil with a certain pressure and flow rate. When the three-position three-way valve 102 is in the second position, the oil pump 9 connects to the output pipeline through the oil inlet and the second oil outlet to output lubricating oil to the cooling lubrication valve 111, the clutch control valve 112, the shift control valve 113 and / or the parking control valve 114. When the three-position three-way valve 102 is in the third position, the oil pump 9 is connected to the output pipeline through the oil inlet and the second oil outlet, and is directly depressurized by connecting to the second oil tank 109 through the oil inlet and the first oil outlet. During the second and third positions, the oil pump 9 flows with lubricating oil, and the output lubricating oil can be used for both output signal and circulating cooling.

[0041] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A device for eliminating idling knocking in a dual-mass flywheel, used in a dual-clutch vehicle, the dual-mass flywheel comprising a primary side flywheel and a secondary side flywheel, the primary side flywheel being connected to the crankshaft of an engine, characterized in that, The device includes a variable load mechanism connected to the secondary flywheel via a clutch, used to change the load on the dual-mass flywheel; The variable load mechanism includes an oil pump and a hydraulic valve body assembly. One end of the oil pump is connected to the secondary flywheel via the clutch, and the other end is connected to the hydraulic valve body assembly. The hydraulic valve body assembly controls the output force of the oil pump, thereby changing the load on the dual-mass flywheel. The drive shaft of the clutch is provided with a drive gear, and the drive shaft of the oil pump is provided with a driven gear, which meshes with the drive gear. The hydraulic valve body assembly includes a three-position three-way valve and a drive mechanism. The drive mechanism is used to drive the three-position three-way valve to change position. The three-position three-way valve includes: The oil inlet, the first oil outlet, and the second oil outlet are provided. The oil inlet is connected to the output end of the oil pump. The first oil outlet is connected to a second oil tank. The second oil outlet can be connected to a cooling and lubrication valve, a clutch control valve, a shift control valve, and / or a parking control valve via an oil outlet pipe. The first cavity block seals the oil inlet, the first oil outlet, and the second oil outlet; The second cavity block connects the oil inlet and the second oil outlet, and closes the first oil outlet; The third cavity block connects the oil inlet, the first oil outlet, and the second oil outlet; The drive mechanism includes: The first hydraulic mechanism and the second hydraulic mechanism are respectively connected to both ends of the valve core of the three-position three-way valve, and are used to drive the three-position three-way valve to change position; A two-position three-way valve is used to cooperate with the first hydraulic mechanism and the second hydraulic mechanism to switch the three-position three-way valve. The two-position three-way valve includes a first port, a second port and a third port. The first port is connected to a first oil tank, the third port is connected to the first hydraulic mechanism, and the second hydraulic mechanism is connected to the oil pump. The left-position chamber of the two-position three-way valve is connected to the second port and the third port; The right-side chamber of the two-position three-way valve is connected to the first port and the third port.

2. The device for eliminating idle knocking of a dual-mass flywheel according to claim 1, characterized in that, Also includes: A first damping orifice is provided on the pipeline between the oil pump and the first hydraulic mechanism; The second damping orifice is disposed on the pipeline between the third port and the second hydraulic mechanism; The third damping orifice is provided on the oil outlet pipe; The first oil filter is installed on the pipeline between the third port and the second damping orifice; A second oil filter is installed on the pipeline between the oil pump and the first port; A make-up oil pump is connected to the oil pump.

3. A method for eliminating idling knocking of a dual-mass flywheel, used in the apparatus for eliminating idling knocking of a dual-mass flywheel as described in any one of claims 1-2, characterized in that, include: The secondary side flywheel connects the variable load mechanism and the dual-mass flywheel; Adjust the load interference resistance to change the load on the dual-mass flywheel.

4. The method for eliminating idle knocking of a dual-mass flywheel according to claim 3, characterized in that, The secondary side flywheel connecting the variable load mechanism and the dual-mass flywheel includes: When the clutch is engaged, the oil pump is connected to the dual-mass flywheel drive.

5. The method for eliminating idle knocking of a dual-mass flywheel according to claim 3, characterized in that, The adjustable load interference resistance includes: Operate the hydraulic valve body assembly to control the two-position three-way valve to switch the three-position three-way valve to the first and second positions, adjust the output force / torque of the oil pump, and thus change the load on the dual-mass flywheel.

6. A car, characterized in that, Includes the device for eliminating idle knocking of a dual-mass flywheel according to any one of claims 1-2.

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