CN109027154B - Tensioning system and engine assembly - Google Patents

Tensioning system and engine assembly Download PDF

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Publication number
CN109027154B
CN109027154B CN201811119403.2A CN201811119403A CN109027154B CN 109027154 B CN109027154 B CN 109027154B CN 201811119403 A CN201811119403 A CN 201811119403A CN 109027154 B CN109027154 B CN 109027154B
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CN
China
Prior art keywords
tensioning wheel
bsg motor
tensioning
belt
controller
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CN201811119403.2A
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Chinese (zh)
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CN109027154A (en
Inventor
陈浩
韩文飞
朱洪伟
许雨涛
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Zhejiang Geely Holding Group Co Ltd
Yiwu Geely Powertrain Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Yiwu Geely Powertrain Co Ltd
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Priority to CN201811119403.2A priority Critical patent/CN109027154B/en
Publication of CN109027154A publication Critical patent/CN109027154A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0823—Electric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0865—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0876—Control or adjustment of actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0893—Circular path

Abstract

The invention relates to the technical field of automobile engines, in particular to a tensioning system and an engine assembly. The tensioning system comprises a controller, a tensioner, a BSG motor, a battery and a current sensor; the tensioner comprises a first tensioning wheel and a second tensioning wheel which are connected, wherein the first tensioning wheel and the second tensioning wheel are respectively positioned on two sides of an output shaft of the BSG motor and can rotate relative to the BSG motor; the battery is electrically connected with the BSG motor, and the current sensor is electrically connected with the controller. The engine assembly comprises the tensioning system. The invention aims to provide a tensioning system and an engine assembly, and aims to solve the technical problems of local slipping, shaking and abnormal sound of a wheel train caused by unstable belt tension during starting and working condition conversion of a BSG system in the prior art.

Description

Tensioning system and engine assembly
Technical Field
The invention relates to the technical field of automobile engines, in particular to a tensioning system and an engine assembly.
Background
When the traditional power automobile waits for a red light and is in traffic jam, if a driver does not actively extinguish the engine, the idling of the engine can cause serious energy waste and environmental pollution. The advent of BSG systems has reduced energy consumption and pollutant emissions of conventional powered vehicles during non-driving conditions.
BSG (belt drive Starter Generator) is a belt drive starting/generating integrated motor, belonging to a weak hybrid power system. The BSG system is a device which increases the rotating speed of an engine from zero to above an idle speed in a very short time by using a BSG motor through belt transmission, thereby realizing the quick start and stop of an automobile. That is to say, the BSG is a hybrid technology with idle stop and start functions, and can realize that the engine of the automobile stops working before the red light and in traffic jam, and when the automobile recognizes that the driver has a starting intention, the system quickly starts the engine through the BSG system, so that the oil consumption, emission and noise of the engine in idle working are eliminated. Compared with the traditional vehicle type, the vehicle structure has the advantages of small change, simple control, low cost and easy realization of industrialization. Compared with the traditional engine, the 48V BSG engine replaces the traditional generator with the BSG motor.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an accessory gear train layout in a BSG system in the prior art, and a motor pulley in driving connection with a BSG motor 1 'and a crank pulley 4' of an engine 5 'perform mechanical force transmission through a belt 3'. The BSG motor 1 ' can realize the functions of quick start, engine boosting, braking energy recovery and power generation in the gear train set, the BSG motor is provided with the tensioner 2 ', the tensioner 2 ' can compensate the extension of the belt 3 ' and keep the tension of the belt 3 ' during starting and working condition conversion, so that the stability of the gear train is maintained, and the normal operation of the gear train is ensured.
Wherein, among the prior art, tensioning ware relies on the spring to keep the tension of belt, because the BSG motor is starting or when realizing the operating mode conversion, the instantaneous tension change of belt is big, leads to the system unstability and the train skids partially, causes to start the shake, NVH problem when the operating mode conversion.
The present application thus provides a new tensioning system and engine assembly that addresses the above-identified problems.
Disclosure of Invention
The invention aims to provide a tensioning system to solve the technical problems of local slipping, shaking and abnormal sound of a wheel train caused by unstable belt tension during starting and working condition conversion of a BSG system in the prior art.
The invention also aims to provide an engine assembly to further solve the technical problems of local slipping, shaking and abnormal sound of a wheel train caused by unstable belt tension during starting and working condition conversion of a BSG system in the prior art.
In view of the above first object, the present invention provides a tensioning system comprising a controller, a tensioner, a BSG motor, a battery, and a current sensor;
the tensioner comprises a first tensioning wheel and a second tensioning wheel which are connected;
the first tensioning wheel and the second tensioning wheel are connected with a shell of the BSG motor, are respectively positioned at two sides of an output shaft of the BSG motor, are respectively corresponding to belts at two sides of the output shaft of the BSG motor, and can rotate relative to the shell of the BSG motor;
the battery is electrically connected with the BSG motor, and the current sensor is electrically connected with the controller;
the current sensor is used for monitoring the current between the battery and the BSG motor and sending the current to the controller, and when the current between the battery and the BSG motor changes, the controller correspondingly controls the first tensioning wheel and the second tensioning wheel to rotate.
In the above technical solution, further, when the current sensor of the present invention is used for monitoring an increase in current between the battery and the BSG motor, the controller correspondingly controls the second tensioner to rotate in a direction approaching the belt;
the current sensor is used for monitoring that the current direction between the battery and the BSG motor is converted from a second direction to a first direction, and the controller correspondingly controls the second tensioning wheel to rotate towards the direction close to the belt;
the current sensor is used for monitoring that when the current direction between the battery and the BSG motor is converted from the first direction to the second direction, the controller correspondingly controls the first tensioning wheel to rotate towards the direction close to the belt;
the first direction and the second direction are opposite.
In any of the above technical solutions, further, the tensioning system of the present invention further includes an actuating device fixed relative to the housing of the BSG motor;
the actuating device is electrically connected with the controller and is in driving connection with the first tensioning wheel and the second tensioning wheel;
when the current between the battery and the BSG motor is changed, the controller correspondingly controls the actuating device to enable the actuating device to drive the first tensioning wheel and the second tensioning wheel to rotate.
In any of the above technical solutions, further, the executing apparatus of the present invention includes a first executing component and a second executing component, and both the first executing component and the second executing component are fixed with respect to a housing of the BSG motor;
the first execution assembly and the second execution assembly are electrically connected with the controller;
the first executing assembly is in driving connection with the first tensioning wheel and can enable the first tensioning wheel to rotate towards the direction close to the belt; the second executing assembly is in driving connection with the second tensioning wheel and can enable the second tensioning wheel to rotate towards the direction close to the belt.
In any of the above technical solutions, further, the first executing assembly of the present invention includes a first driving part and a first executing part, the first driving part is fixed relative to the housing of the BSG motor, and the first driving part is connected to the first executing part in a driving manner; the first driving part is electrically connected with the controller, and the first tensioning wheel is connected with the first executing part;
and/or the second execution assembly comprises a second driving part and a second execution part, the second driving part is fixed relative to the shell of the BSG motor, and the second driving part is connected with the second execution part in a driving manner; the second driving portion is electrically connected to the controller, and the second tension pulley is connected to the second actuator.
In any of the above technical solutions, further, the tensioning system of the present invention further includes a magnetic tensioner;
the first driving part and the second driving part are electrically connected with the controller through the magnetic tensioner.
In any of the above technical solutions, further, the tensioning system of the present invention further includes a first electromagnetic control valve and a second electromagnetic control valve;
the magnetic tensioner is electrically connected with the first driving part through the first electromagnetic control valve, and the magnetic tensioner is electrically connected with the second driving part through the second electromagnetic control valve.
In any of the above technical solutions, further, the tensioner of the present invention includes an intermediate bracket, a first rotating bracket and a second rotating bracket;
the first rotating bracket is connected with the second rotating bracket and is rotationally connected with the middle bracket;
the first tensioning wheel is rotationally connected with the first rotating bracket, and the second tensioning wheel is rotationally connected with the second rotating bracket;
the middle bracket is connected with a shell of the BSG motor;
the current sensor is used for monitoring the current between the battery and the BSG motor and sending the current to the controller, and when the current between the battery and the BSG motor changes, the controller correspondingly controls the first rotating bracket and the second rotating bracket to rotate.
In any of the above technical solutions, further, the tensioner of the present invention further includes a mounting bracket;
the middle support is connected with the BSG motor through the mounting rack.
In view of the second object, the present invention provides an engine assembly comprising the tensioning system.
By adopting the technical scheme, the invention has the following beneficial effects:
when the tensioning system is used, the belt passes through the BSG motor belt wheel of the BSG motor, and the first tensioning wheel and the second tensioning wheel are respectively positioned on two sides of the output shaft of the BSG motor, so that the first tensioning wheel and the second tensioning wheel respectively correspond to the belt on two sides of the BSG motor belt wheel.
It should be noted that, when the BSG motor is started and the operating condition is switched, the current between the battery and the BSG motor changes, and the controller correspondingly controls the first tensioning wheel and the second tensioning wheel to rotate. Specifically, when the BSG motor is started and the working condition of the BSG motor is changed, one side of the belt on the two sides of the belt wheel of the BSG motor is a loose edge, and the other side of the belt is a tight edge. When the belt corresponding to the first tensioning wheel is an elastic edge and the belt corresponding to the second tensioning wheel is a tight edge, the controller correspondingly controls the first tensioning wheel and the second tensioning wheel to rotate so as to enable the first tensioning wheel to rotate towards the direction close to the elastic edge belt, so that the first tensioning wheel generates tension on the elastic edge belt, and the elastic edge belt is ensured to have enough tension for transmission; when the belt that the second take-up pulley corresponds is the slack side, and the belt that first take-up pulley corresponds is when tight limit, first take-up pulley of controller corresponding control and second take-up pulley rotate to make the second take-up pulley rotate to the direction that is close to the slack side belt, thereby the second take-up pulley produces tension on the slack side belt, guarantees that the slack side belt has sufficient tension to carry out the transmission. In conclusion, the tension system provided by the embodiment cancels a spring structure, utilizes the current between the battery and the BSG motor to control the state of the tensioner in real time, and enables the tensioner to instantly and synchronously compensate the extension of the belt, so that the tension of the belt is controlled in a stable state in real time, the continuous stability of the belt tension of the BSG motor during starting and working condition change is ensured, the problems of shaking, abnormal sound during starting working condition switching and the like caused by local skidding of a wheel train are avoided, and the vehicle is more stable.
The engine assembly comprises the tensioning system, and further solves the technical problems of local slipping, shaking and abnormal sound of a wheel train caused by unstable belt tension during starting and working condition conversion of a BSG system in the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a layout structure of an accessory gear train of a BSG system in the prior art;
FIG. 2 is a schematic structural view of a tensioner of a tensioning system provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a layout of accessory gear trains of a BSG system of an engine assembly according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a tensioning system according to an embodiment of the present invention.
Icon: 1' -BSG motors; 2' -tensioners; 3' -a belt; 4' -a crankshaft pulley; 5' -an engine;
1-a controller; 21-a first tensioning wheel; 22-a second tensioning wheel; 23-a middle support; 24-a first rotating support; 25-a second rotating support; 26-a mounting frame; 3-BSG motor; 31-BSG motor belt wheel; 4-a battery; 5-a current sensor; 61-a first execution component; 611 — a first drive; 612-a first execution section; 62-a second execution component; 621-a second driving part; 622-second execution part; 7-a magnetic tensioner; 81-a first solenoid control valve; 82-a second solenoid control valve; 91-crankshaft pulley; 92-a load pulley; 93-belts.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 2 to 4, the present embodiment provides a tensioning system including a controller 1, a tensioner, a BSG motor 3, a battery 4, and a current sensor 5;
the tensioner comprises a first tension wheel 21 and a second tension wheel 22 which are connected;
the first tensioning wheel 21 and the second tensioning wheel 22 are connected with the shell of the BSG motor 3, are respectively positioned at two sides of the output shaft of the BSG motor 3, are respectively used for corresponding to the belts at two sides of the output shaft of the BSG motor, and can rotate relative to the shell of the BSG motor 3;
the battery 4 is electrically connected with the BSG motor 3, and the current sensor 5 is electrically connected with the controller 1;
the current sensor 5 is used for monitoring the current between the battery 4 and the BSG motor 3 and sending the current to the controller 1, and when the current between the battery 4 and the BSG motor 3 changes, the controller 1 correspondingly controls the first tensioning wheel 21 and the second tensioning wheel 22 to rotate.
In the prior art, when a BSG motor is in a starting working condition, a tensioner driven by a spring cannot instantaneously compensate the extension of a belt, so that the belt slip generated in the process is inevitable, and the gear train has large vibration and poor driving feeling in the starting process of the BSG motor; when the BSG motor is in a working condition of switching between power assisting and energy recovery, the elastic edge of the belt can be switched in the wheel train, and the problem of slipping abnormal sound in the switching process is caused due to the fact that the tension of an automatic tensioner spring cannot instantaneously compensate the extension of the belt in the switching process, so that customer complaints are caused.
In the tensioning system provided by the embodiment, when the belt 93 passes through the BSG motor pulley 31 of the BSG motor 3, the first tensioning pulley 21 and the second tensioning pulley 22 respectively correspond to the belt 93 on both sides of the BSG motor pulley 31 because the first tensioning pulley 21 and the second tensioning pulley 22 are respectively located on both sides of the output shaft of the BSG motor 3.
It should be noted that, when the BSG motor 3 is started and the operating condition is changed, the current between the battery 4 and the BSG motor 3 is changed, and the controller 1 correspondingly controls the first tensioning wheel 21 and the second tensioning wheel 22 to rotate.
Specifically, when the BSG motor 3 is started and the operating condition is switched, one side of the belt 93 on both sides of the BSG motor pulley 31 is a loose edge, and the other side is a tight edge. When the belt corresponding to the first tensioning wheel 21 is a slack side and the belt corresponding to the second tensioning wheel 22 is a tight side, the controller 1 correspondingly controls the first tensioning wheel 21 and the second tensioning wheel 22 to rotate so as to enable the first tensioning wheel 21 to rotate towards the direction close to the slack side belt, so that the first tensioning wheel 21 generates tension on the slack side belt, and the slack side belt is ensured to have enough tension for transmission; when the belt corresponding to the second tensioning wheel 22 is a slack side and the belt corresponding to the first tensioning wheel 21 is a tight side, the controller 1 correspondingly controls the first tensioning wheel 21 and the second tensioning wheel 22 to rotate so as to enable the second tensioning wheel 22 to rotate towards the direction close to the slack side belt, so that the second tensioning wheel 22 generates tension on the slack side belt, and the slack side belt is ensured to have enough tension for transmission.
In conclusion, the spring structure is cancelled in the tensioning system provided by the embodiment, the state of the tensioner is controlled in real time by utilizing the current between the battery 4 and the BSG motor 3, the tensioner is enabled to synchronously compensate the extension of the belt 93 instantly, so that the tension of the belt 93 is controlled in a stable state in real time, the continuous stability of the tension of the belt 93 when the BSG motor 3 is started and the working condition is changed is ensured, the problems of shaking, abnormal sound caused by the switching of the starting working condition and the like due to the local skidding of a wheel train are avoided, and the vehicle is enabled to be more stable.
The tensioning system disclosed in this embodiment is suitable for use in a hybrid engine, wherein the tensioning system employs two tensioning wheels that are arranged in a swinging manner: the first tensioning wheel 21 and the second tensioning wheel 22 achieve tensioning of the two sides of the BSG motor 3, the BSG motor 3 is adaptive to exchange of the elastic sides of the belts 93 in different working states, response is fast, rapid starting and stopping of an engine are facilitated, and faults are avoided.
Preferably, the controller 1 is an ECU of the vehicle, which is an abbreviation of the elec-mal Control Unit, i.e. an electronic Control Unit, also called "driving computer".
Preferably, the current sensor 5 is used for monitoring the current between the battery 4 and the BSG motor 3 to be increased, and the controller 1 correspondingly controls the second tensioning pulley 22 to rotate towards the belt 93;
the current sensor 5 is used for monitoring that when the current direction between the battery 4 and the BSG motor 3 is converted from the second direction to the first direction, the controller 1 correspondingly controls the second tensioning pulley 22 to rotate towards the direction close to the belt 93;
the current sensor 5 is used for monitoring that when the current direction between the battery 4 and the BSG motor 3 is converted from a first direction to a second direction, the controller 1 correspondingly controls the first tensioning wheel 21 to rotate towards the direction close to the belt 93;
the first direction is opposite to the second direction.
For example, when the BSG motor 3 is in the start condition, the battery 4 outputs current to the BSG motor 3, the current direction at this time is made to be the first direction, the current between the battery 4 and the BSG motor 3 increases, the belt corresponding to the second tensioning pulley 22 is a slack side, and the belt corresponding to the first tensioning pulley 21 is a tight side. Correspondingly controlling the second tensioning wheel 22 to rotate towards the direction close to the belt through the controller 1, so that the second tensioning wheel 22 rotates towards the direction close to the slack side belt, and the second tensioning wheel 22 generates tension on the slack side belt;
when the BSG motor 3 is in the boosting working condition, the battery 4 outputs current to the BSG motor 3, the current direction is the first direction, the belt corresponding to the second tensioning wheel 22 is a loose edge, and the belt corresponding to the first tensioning wheel 21 is a tight edge; when the BSG motor 3 is in the energy recovery working condition, the BSG motor 3 outputs current to the battery 4, the current direction is made to be the second direction, the belt corresponding to the first tensioning wheel 21 is a loose edge, and the belt corresponding to the second tensioning wheel 22 is a tight edge;
when the current direction between the battery 4 and the BSG motor 3 is converted from the second direction to the first direction, the BSG motor 3 is in the process of converting from the energy recovery working condition to the boosting working condition, and the belt can have elastic edge switching in the wheel train, and is switched to be the elastic edge corresponding to the second tensioning wheel 22 and the elastic edge corresponding to the first tensioning wheel 21, and the controller 1 correspondingly controls the second tensioning wheel 22 to rotate towards the direction close to the belt, so that the second tensioning wheel 22 rotates towards the direction close to the elastic edge belt, and the second tensioning wheel 22 generates tension on the elastic edge belt;
when the current direction between the battery 4 and the BSG motor 3 is changed from the first direction to the second direction, the BSG motor 3 is in the process of changing from the boosting working condition to the energy recovery working condition, and the belt can have the elastic edge switching in the wheel train, and is changed into the belt corresponding to the first tensioning wheel 21 as the elastic edge, and the belt corresponding to the second tensioning wheel 22 as the elastic edge, the first tensioning wheel 21 is correspondingly controlled to rotate towards the direction close to the belt through the controller 1, so that the first tensioning wheel 21 rotates towards the direction close to the elastic edge belt, and the first tensioning wheel 21 generates tension on the elastic edge belt.
In conclusion, the charging system provided by the embodiment judges the working condition of the BSG motor 3 by using the change of the current magnitude and direction between the battery 4 and the BSG motor 3, so as to correspondingly control the state of the tensioner in real time, and make the tensioner instantly and synchronously compensate the extension of the belt 93, thereby controlling the tension of the belt 93 to be in a stable state in real time, ensuring the continuous stability of the tension of the belt 93 when the BSG motor 3 is started and the working condition is changed, avoiding the local slipping of a wheel train, causing the problems of shaking, abnormal sound slipping and the like when the starting working condition is switched, and making the vehicle more stable.
Preferably, the tensioning system of this embodiment further comprises an actuator fixed relative to the housing of the BSG motor;
the actuating device is electrically connected with the controller 1 and is in driving connection with the first tensioning wheel 21 and the second tensioning wheel 22;
when the current between the battery 4 and the BSG motor 3 varies, the controller 1 controls the actuator correspondingly to cause the actuator to drive the first tension pulley 21 and the second tension pulley 22 to rotate.
The first tensioning wheel 21 and the second tensioning wheel 22 are driven to rotate by the actuating device, so that the first tensioning wheel 21 or the second tensioning wheel 22 generates tension on the loose-edge belt 93, and the loose-edge belt 93 is ensured to have enough tension for transmission.
Preferably, referring to fig. 3, the actuating device includes a first actuating assembly 61 and a second actuating assembly 62, and both the first actuating assembly and the second actuating assembly are fixed relative to the housing of the BSG motor;
the first executing component 61 and the second executing component 62 are both electrically connected with the controller 1;
the first actuating assembly 61 is in driving connection with the first tensioning wheel 21, and can enable the first tensioning wheel 21 to rotate towards the direction close to the belt 93; the second actuator 62 is drivingly connected to the second tensioner 22, and can rotate the second tensioner 22 in a direction approaching the belt 93.
Specifically, when the current between the battery 4 and the BSG motor 3 changes, the controller 1 correspondingly controls the first actuator 61 or the second actuator 62 to be activated, so that the first actuator 61 drives the first tensioning roller 21 to rotate in the direction approaching the belt 93, or the second actuator 62 drives the second tensioning roller 22 to rotate in the direction approaching the belt 93.
It should be noted that, when the BSG motor 3 is started and the working condition is switched, the belt corresponding to the first tensioning wheel 21 is made to be a loose edge, and the belt corresponding to the second tensioning wheel 22 is made to be a tight edge, at this time, the current between the battery 4 and the BSG motor 3 changes correspondingly, the controller 1 controls the first executing component 61 to be started correspondingly, and the second executing component 62 is not started, so that the first executing component 61 drives the first tensioning wheel 21 to rotate towards the direction close to the belt; when the BSG motor 3 is started and the working conditions are switched, the belt corresponding to the second tensioning wheel 22 is made to be a loose edge, and when the belt corresponding to the first tensioning wheel 21 is made to be a tight edge, the current between the battery 4 and the BSG motor 3 is correspondingly changed at this time, the controller 1 correspondingly controls the second executing component 62 to be started, and the first executing component 61 is not started, so that the second executing component 62 drives the second tensioning wheel 22 to rotate towards the direction close to the belt.
Preferably, referring to fig. 3, the first actuating assembly 61 includes a first driving part 611 and a first actuating part 612, the first driving part is fixed relative to the housing of the BSG motor, and the first driving part 611 is connected to the first actuating part 612 in a driving manner; the first driving part 611 is electrically connected to the controller 1, and the first tension wheel 21 is connected to the first executing part 612;
and/or the second actuating assembly 62 comprises a second driving part 621 and a second actuating part 622, the second driving part is fixed relative to the housing of the BSG motor, and the second driving part 621 is in driving connection with the second actuating part 622; the second driving unit 621 is electrically connected to the controller 1, and the second tensioning wheel 22 is connected to the second actuator 622.
Specifically, the first actuating assembly 61 includes a first driving part 611 and a first actuating part 612, the first driving part is fixed relative to the housing of the BSG motor, and the first driving part 611 is connected with the first actuating part 612 in a driving manner; the first driving part 611 is electrically connected to the controller 1, and the first tension wheel 21 is connected to the first executing part 612;
or, the second actuating assembly 62 includes a second driving part 621 and a second actuating part 622, the second driving part is fixed relative to the housing of the BSG motor, and the second driving part 621 is connected to the second actuating part 622 in a driving manner; the second driving unit 621 is electrically connected to the controller 1, and the second tensioning wheel 22 is connected to the second actuator 622;
or, the first actuating assembly 61 includes a first driving part 611 and a first actuating part 612, the first driving part is fixed relative to the housing of the BSG motor, and the first driving part 611 is connected to the first actuating part 612 in a driving manner; the first driving part 611 is electrically connected to the controller 1, and the first tension wheel 21 is connected to the first executing part 612; the second actuating assembly 62 includes a second driving part 621 and a second actuating part 622, the second driving part is fixed relative to the housing of the BSG motor, and the second driving part 621 is connected to the second actuating part 622 in a driving manner; the second driving unit 621 is electrically connected to the controller 1, and the second tensioning wheel 22 is connected to the second actuator 622.
When the current between the battery 4 and the BSG motor 3 changes, the controller 1 correspondingly controls the first driving part 611 or the second driving part 621 to start, so that the first driving part 611 drives the first executing part 612 to move, and the first tensioning wheel 21 moves along with the first executing part 612, thereby realizing the rotation of the first tensioning wheel 21; or the second driving part 621 drives the second actuator 622 to move, so that the second tension pulley 22 moves along with the second actuator 622, and the rotation of the second tension pulley 22 is realized.
Alternatively, the first driving part 611 includes a first motor, and the first actuating part 612 includes a first lead screw nut; the first motor is fixed relative to the BSG motor 3, a first lead screw of the first lead screw nut rotates relative to the BSG motor 3, and the first nut of the first lead screw nut is screwed on the first lead screw; when the first motor drives the first lead screw to rotate, the first nut can move along the first lead screw; the first nut corresponds to the first tensioning wheel 21 and can push the first tensioning wheel 21 to rotate towards the direction close to the belt 93 when moving along the first lead screw;
the second driving part 621 includes a second motor, and the second actuating part 622 includes a second lead screw nut; the second motor is fixed relative to the BSG motor 3, a second lead screw of the second lead screw nut rotates relative to the BSG motor 3, and the second nut of the second lead screw nut is screwed on the second lead screw; when the second motor drives the second lead screw to rotate, the second nut can move along the second lead screw; the second nut corresponds to the second tension pulley 22, and when moving along the second lead screw, the second nut can push the second tension pulley 22 to rotate in a direction approaching the belt 93.
Preferably, referring to fig. 4, the tensioning system of the present embodiment further comprises a magnetic tensioner 7;
the first driving part 611 and the second driving part 621 are electrically connected to the controller 1 through the magnetic tensioner 7.
When the current sensor 5 monitors the current change between the battery 4 and the BSG motor 3, the controller 1 correspondingly controls the magnetic tensioner 7 to output a corresponding current to the first driving part 611 or the second driving part 621 according to the current information, so that the first driving part 611 drives the first executing part 612 to push the first tensioning wheel 21 to rotate by a corresponding angle, so as to adapt to the elongation of the elastic belt 93, and avoid the influence of the first tensioning wheel 21 on the transmission caused by the excessively large or excessively small tension of the elastic belt 93; or, the second driving portion 621 drives the second executing portion 622 to push the second tensioning wheel 22 to rotate by a corresponding angle to adapt to the elongation of the slack side belt 93, so as to avoid that the tension of the slack side belt 93 is too large or too small by the second tensioning wheel 22, which affects transmission.
The magnetic tensioner 7 is a conventional tension control device that generates damping by converting torque change with a magnetic field and has no mechanical friction, and a motor is supplied with a certain amount of current through the magnetic tensioner 7.
Preferably, referring to fig. 4, the tensioning system of the present embodiment further comprises a first solenoid control valve 81 and a second solenoid control valve 82;
the magnetic tensioner 7 is electrically connected to the first driving part 611 through the first electromagnetic control valve 81, and the magnetic tensioner 7 is electrically connected to the second driving part 621 through the second electromagnetic control valve 82.
Specifically, when the current sensor 5 monitors the current change between the battery 4 and the BSG motor 3, the controller 1 controls the magnetic tensioner 7 to output a corresponding current according to the current information, and controls the first electromagnetic control valve 81 or the second electromagnetic control valve 82 to close, so that the current output by the magnetic tensioner 7 is supplied to the first driving part 611 or the second driving part 621.
Preferably, as shown in fig. 2, the tensioner comprises an intermediate bracket 23, a first rotating bracket 24 and a second rotating bracket 25;
the first rotating bracket 24 is connected with the second rotating bracket 25 and is rotatably connected with the middle bracket 23;
the first tension wheel 21 is rotationally connected with the first rotating bracket 24, and the second tension wheel 22 is rotationally connected with the second rotating bracket 25;
the middle bracket 23 is connected with the shell of the BSG motor 3;
the current sensor 5 is used for monitoring the current between the battery 4 and the BSG motor 3 and sending the current to the controller 1, and when the current between the battery 4 and the BSG motor 3 changes, the controller 1 correspondingly controls the first rotating bracket 24 and the second rotating bracket 25 to rotate.
It should be noted that, when the current between the battery 4 and the BSG motor 3 changes, the controller 1 correspondingly controls the first rotating bracket 24 and the second rotating bracket 25 to rotate, so that the first rotating bracket 24 and the second rotating bracket 25 respectively drive the first tensioning wheel 21 and the second tensioning wheel 22 to rotate, thereby generating tension on the slack side belt and ensuring that the slack side belt has sufficient tension to perform transmission.
Preferably, as shown in fig. 3, the intermediate bracket 23 has a ring shape, and a center line of the ring shape coincides with an axial direction of the output shaft of the BSG motor 3.
Preferably, referring to fig. 2, the tensioner further comprises a mounting bracket 26;
the intermediate bracket 23 is connected to the BSG motor 3 through a mounting bracket 26.
Preferably, the mounting bracket 26 is plural, and the plural mounting brackets 26 are provided at intervals along the circumferential direction of the intermediate bracket 23. Alternatively, the number of mounting brackets 26 is two, three, four, etc.
Optionally, a mounting hole is formed in the mounting bracket 26, and the mounting bracket 26 is connected to the BSG motor 3 through the mounting hole.
Example two
The second embodiment provides an engine assembly, the engine assembly comprises the tensioning system of the first embodiment, the technical characteristics of the tensioning system disclosed in the first embodiment are also applicable to the second embodiment, and the technical characteristics of the tensioning system disclosed in the first embodiment are not repeatedly described. Embodiments of the engine assembly are described in further detail below with reference to the figures.
For economy of space, the improved features of this embodiment are also embodied in fig. 2-4, and the solution of this embodiment is therefore described in connection with fig. 2-4.
Referring to fig. 2-4, the present embodiment provides an engine assembly including a tensioning system.
Preferably, referring to fig. 3, the engine assembly further includes an engine, a load, and a belt 93 sequentially wound around a crankshaft pulley 91 of the engine, an output shaft of the BSG motor 3, a load pulley 92, and pulleys of other engine accessories;
a tensioning system is fixedly arranged on the shell of the BSG motor 3, and the first tensioning wheel 21 and the second tensioning wheel 22 act on the belt 93.
The technical problems of wheel train local slipping, shaking and abnormal sound caused by unstable belt tension during starting and working condition conversion of a BSG system in the prior art are further solved.
The engine assembly of the present embodiment has the advantages of the tensioning system of the embodiment, which have been described in detail in the first embodiment, and will not be repeated here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A tensioning system comprising a controller, a tensioner, a BSG motor, a battery, and a current sensor;
the tensioner comprises a first tensioning wheel and a second tensioning wheel which are connected;
the first tensioning wheel and the second tensioning wheel are connected with a shell of the BSG motor, are respectively positioned at two sides of an output shaft of the BSG motor, are respectively corresponding to belts at two sides of the output shaft of the BSG motor, and can rotate relative to the shell of the BSG motor;
the battery is electrically connected with the BSG motor, and the current sensor is electrically connected with the controller;
the current sensor is used for monitoring the current between the battery and the BSG motor and sending the current to the controller, and when the current between the battery and the BSG motor changes, the controller correspondingly controls the first tensioning wheel and the second tensioning wheel to rotate;
when the belt corresponding to the first tensioning wheel is an elastic edge and the belt corresponding to the second tensioning wheel is a tight edge, the controller correspondingly controls the first tensioning wheel and the second tensioning wheel to rotate so as to enable the first tensioning wheel to rotate towards the direction close to the elastic edge belt;
when the belt corresponding to the second tensioning wheel is an elastic edge and the belt corresponding to the first tensioning wheel is a tight edge, the controller correspondingly controls the first tensioning wheel and the second tensioning wheel to rotate so as to enable the second tensioning wheel to rotate towards the direction close to the elastic edge belt;
the current sensor is used for monitoring the current between the battery and the BSG motor to be increased, and the controller correspondingly controls the second tensioning wheel to rotate towards the direction close to the belt;
the current sensor is used for monitoring that the current direction between the battery and the BSG motor is converted from a second direction to a first direction, and the controller correspondingly controls the second tensioning wheel to rotate towards the direction close to the belt;
the current sensor is used for monitoring that when the current direction between the battery and the BSG motor is converted from the first direction to the second direction, the controller correspondingly controls the first tensioning wheel to rotate towards the direction close to the belt;
the first direction and the second direction are opposite.
2. The tensioning system of claim 1, further comprising an actuator fixed relative to a housing of the BSG motor;
the actuating device is electrically connected with the controller and is in driving connection with the first tensioning wheel and the second tensioning wheel;
when the current between the battery and the BSG motor is changed, the controller correspondingly controls the actuating device to enable the actuating device to drive the first tensioning wheel and the second tensioning wheel to rotate.
3. The tensioning system of claim 2, wherein the actuator includes a first actuator assembly and a second actuator assembly, and wherein the first actuator assembly and the second actuator assembly are each fixed relative to a housing of the BSG motor;
the first execution assembly and the second execution assembly are electrically connected with the controller;
the first executing assembly is in driving connection with the first tensioning wheel and can enable the first tensioning wheel to rotate towards the direction close to the belt; the second executing assembly is in driving connection with the second tensioning wheel and can enable the second tensioning wheel to rotate towards the direction close to the belt.
4. The tensioning system of claim 3, wherein the first actuator assembly includes a first drive portion and a first actuator portion, the first drive portion being fixed relative to a housing of the BSG motor and the first drive portion being drivingly connected to the first actuator portion; the first driving part is electrically connected with the controller, and the first tensioning wheel is connected with the first executing part;
and/or the second execution assembly comprises a second driving part and a second execution part, the second driving part is fixed relative to the shell of the BSG motor, and the second driving part is connected with the second execution part in a driving manner; the second driving portion is electrically connected to the controller, and the second tension pulley is connected to the second actuator.
5. The tensioning system according to claim 4, further comprising a magnetic tensioner;
the first driving part and the second driving part are electrically connected with the controller through the magnetic tensioner.
6. The tensioning system according to claim 5, further comprising a first solenoid control valve and a second solenoid control valve;
the magnetic tensioner is electrically connected with the first driving part through the first electromagnetic control valve, and the magnetic tensioner is electrically connected with the second driving part through the second electromagnetic control valve.
7. The tensioning system according to any one of claims 1-6, wherein the tensioner comprises an intermediate bracket, a first rotating bracket, and a second rotating bracket;
the first rotating bracket is connected with the second rotating bracket and is rotationally connected with the middle bracket;
the first tensioning wheel is rotationally connected with the first rotating bracket, and the second tensioning wheel is rotationally connected with the second rotating bracket;
the middle bracket is connected with a shell of the BSG motor;
the current sensor is used for monitoring the current between the battery and the BSG motor and sending the current to the controller, and when the current between the battery and the BSG motor changes, the controller correspondingly controls the first rotating bracket and the second rotating bracket to rotate.
8. The tensioning system of claim 7, wherein the tensioner further comprises a mounting bracket;
the middle support is connected with the BSG motor through the mounting rack.
9. An engine assembly comprising a tensioning system according to any one of claims 1 to 8.
CN201811119403.2A 2018-09-25 2018-09-25 Tensioning system and engine assembly Active CN109027154B (en)

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CN114198198A (en) * 2021-12-17 2022-03-18 奇瑞汽车股份有限公司 Engine accessory wheel train of BSG motor

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CN1484741A (en) * 2000-10-03 2004-03-24 �Ǵĺ�˾ Motor/generator and accessory belt drive system
CN1496455A (en) * 2000-10-03 2004-05-12 �Ǵĺ�˾ Accessory drive system including motor/generator
WO2011157475A1 (en) * 2010-06-17 2011-12-22 Schaeffler Technologies Gmbh & Co. Kg Method and control device for steadying a belt drive
CN105179083A (en) * 2015-11-09 2015-12-23 重庆大学 Tension adjusting device for self-adaptive engine front end accessory gear train
CN105864378A (en) * 2016-04-07 2016-08-17 宁波丰茂远东橡胶有限公司 Belt tensioning equipment of hybrid electric vehicle
CN207539284U (en) * 2017-11-09 2018-06-26 贵阳吉利发动机有限公司 A kind of novel Dual directional tightener

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Publication number Priority date Publication date Assignee Title
CN1484741A (en) * 2000-10-03 2004-03-24 �Ǵĺ�˾ Motor/generator and accessory belt drive system
CN1496455A (en) * 2000-10-03 2004-05-12 �Ǵĺ�˾ Accessory drive system including motor/generator
WO2011157475A1 (en) * 2010-06-17 2011-12-22 Schaeffler Technologies Gmbh & Co. Kg Method and control device for steadying a belt drive
CN105179083A (en) * 2015-11-09 2015-12-23 重庆大学 Tension adjusting device for self-adaptive engine front end accessory gear train
CN105864378A (en) * 2016-04-07 2016-08-17 宁波丰茂远东橡胶有限公司 Belt tensioning equipment of hybrid electric vehicle
CN207539284U (en) * 2017-11-09 2018-06-26 贵阳吉利发动机有限公司 A kind of novel Dual directional tightener

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