All-terrain vehicle and method for controlling an engine in the vehicle

Abstract

The present application relates to an all-terrain vehicle and a method for controlling an engine in the vehicle, wherein the method comprises: obtaining vehicle operation information of the vehicle at a first time, obtaining the speed ratio of the driving wheel and the driven wheel at the first time; obtaining a preset speed ratio range matching the vehicle operation information at the first time according to the vehicle operation information at the first time; comparing the speed ratio of the driving wheel and the driven wheel at the first time with the preset speed ratio range to determine whether the continuously variable transmission slips at the first time; if the continuously variable transmission slips at the first time, adjusting the torque output by the engine according to the vehicle operation information at the first time. Through the present application, the problem of drive belt damage caused by the slip of the continuously variable transmission of the all-terrain vehicle is solved.

Description

Technical Field

[0001] The present application relates to the field of four-wheeled vehicles, and in particular to an all-terrain vehicle and a method for controlling an engine in the vehicle. Background Art

[0002] Some wheeled vehicles with engines, such as all-terrain vehicles, are provided with a continuously variable transmission for transmitting torque from the engine to the wheels. The continuously variable transmission has a driving wheel, a driven wheel, and a transmission belt that passes between the driving wheel and the driven wheel and transmits torque.

[0003] In one case, at the beginning of the vehicle operation, a large degree of slippage may occur between the drive belt and the driving and driven wheels until the drive belt is synchronized with the driving and driven wheels. In another case, when the vehicle is loaded, such as when the vehicle is pulling a heavy load or traveling through deep mud or sand, a large degree of slippage may occur between the drive belt and one or both of the driving and driven wheels. If the vehicle is operated for a long time in a slipping state, the continuously variable transmission will generate too much heat. And considering that the transmission efficiency of the continuously variable transmission is low after the drive belt slips, sometimes the driver will increase the throttle to respond, resulting in an increase in the temperature of the drive belt, which is more likely to cause the belt to slip, resulting in serious damage to the belt.

[0004] In summary, there is currently no effective solution to the problem of drive belt damage caused by slippage of a vehicle's continuously variable transmission. Summary of the invention

[0005] In this embodiment, an all-terrain vehicle and a method for controlling an engine in the vehicle are provided, which solve the problem of drive belt damage caused by slippage of a continuously variable transmission of the all-terrain vehicle.

[0006] In a first aspect, a method for controlling an engine in a vehicle is provided in this embodiment, wherein the vehicle comprises the engine, a continuously variable transmission and a gear device, wherein one end of the continuously variable transmission is connected to the engine, and the other end of the continuously variable transmission is connected to the gear device, and the continuously variable transmission is used to transmit the torque output by the engine to the gear device, and the gear device drives the vehicle to run;

[0007] The continuously variable transmission comprises:

[0008] A driving wheel connected to the crankshaft of the engine;

[0009] A driven wheel connected to the input shaft of the gear device;

[0010] A transmission belt connects the driving wheel and the driven wheel and is used to transmit torque between the driving wheel and the driven wheel; characterized in that the method includes:

[0011] Acquire vehicle operation information of the vehicle at a first time, and acquire a speed ratio between the driving wheel and the driven wheel at the first time;

[0012] According to the vehicle operation information at the first time, obtaining a preset speed ratio range matching the vehicle operation information at the first time;

[0013] Comparing the speed ratio between the driving wheel and the driven wheel at the first time with the preset speed ratio range to determine whether the continuously variable transmission is slipping at the first time;

[0014] If the continuously variable transmission slips at the first time, the torque output by the engine is adjusted according to the vehicle operation information at the first time.

[0015] In some embodiments, obtaining the speed ratio between the driving wheel and the driven wheel at the first time includes:

[0016] Acquire the rotation speed of the crankshaft of the engine at the first time and the speed of the vehicle at the first time;

[0017] Determining the rotation speed of the driving wheel at the first time according to the rotation speed of the crankshaft at the first time, and determining the rotation speed of the driven wheel at the first time according to the speed of the vehicle at the first time;

[0018] Determining a speed ratio between the driving wheel and the driven wheel at the first time according to the speed of the driving wheel at the first time and the speed of the driven wheel at the first time;

[0019] Wherein, determining the rotation speed of the driven wheel at the first time according to the speed of the vehicle at the first time includes:

[0020] Acquiring a gear position of the gear device at the first time, and determining a speed ratio of the gear device at the first time according to the gear position;

[0021] determining a rotation speed of an input shaft of the gear device at the first time according to a vehicle speed of the vehicle at the first time and a speed ratio of the gear device at the first time;

[0022] The rotation speed of the driven wheel at the first time is determined according to the rotation speed of the input shaft of the gear device at the first time.

[0023] In some of the embodiments, obtaining the vehicle speed of the vehicle at the first time includes: determining the vehicle speed of the vehicle at the first time by a vehicle speed detection device;

[0024] Acquiring the rotation speed of the crankshaft of the engine at the first time includes: determining the rotation speed of the crankshaft of the engine at the first time by an engine rotation speed detection device;

[0025] Acquiring the gear position of the gear device at the first time includes: determining the gear position of the gear device at the first time by a gear device gear position detection device.

[0026] In some of the embodiments, the vehicle operation information includes: the rotation speed of the driving wheel, the rotation speed of the driven wheel, the throttle opening of the throttle valve body, and the fuel injection amount of the injector.

[0027] In some of the embodiments, if the continuously variable transmission slips at the first time, controlling a dashboard of the vehicle to display a warning indication;

[0028] Wherein, adjusting the torque output by the engine according to the vehicle operation information at the first time includes: adjusting the throttle opening of the throttle valve body of the vehicle and / or the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time.

[0029] In some of the embodiments, if the vehicle adopts an electronic throttle valve body, adjusting the throttle opening of the throttle valve body of the vehicle and / or the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time is: adjusting the throttle opening of the throttle valve body of the vehicle according to the vehicle operation information at the first time, or adjusting the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time, or adjusting the throttle opening of the throttle valve body of the vehicle and the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time;

[0030] If the vehicle adopts a mechanical throttle valve body, adjusting the throttle opening of the throttle valve body of the vehicle and / or the fuel injection amount of the vehicle's injector according to the vehicle operation information at the first time is: adjusting the fuel injection amount of the vehicle's injector according to the vehicle operation information at the first time.

[0031] In a second aspect, an all-terrain vehicle is provided in this embodiment, the all-terrain vehicle comprises an engine, a continuously variable transmission and a gear device, one end of the continuously variable transmission is connected to the engine, the other end of the continuously variable transmission is connected to the gear device, the continuously variable transmission is used to transmit the power output by the engine to the gear device, and the gear device drives the all-terrain vehicle to run;

[0032] The continuously variable transmission comprises:

[0033] A driving wheel connected to the crankshaft of the engine;

[0034] A driven wheel connected to the input shaft of the gear device;

[0035] a transmission belt connecting the driving wheel and the driven wheel and used to transmit torque between the driving wheel and the driven wheel; the all-terrain vehicle also includes a control unit;

[0036] The control unit obtains vehicle operation information of the all-terrain vehicle at a first time and obtains a speed ratio between the driving wheel and the driven wheel at the first time;

[0037] The control unit also acquires a preset speed ratio range matching the vehicle operation information at the first time according to the vehicle operation information at the first time;

[0038] The control unit also compares the speed ratio between the driving wheel and the driven wheel at the first time with the preset speed ratio range to determine whether the continuously variable transmission slips at the first time;

[0039] If the continuously variable transmission slips at the first time, the control unit adjusts the torque output by the engine according to the vehicle operation information at the first time.

[0040] In some of the embodiments, the all-terrain vehicle further comprises:

[0041] an instrument panel connected to the control unit;

[0042] a throttle valve body for controlling air intake into said engine;

[0043] A fuel injector, used to control the injection of fuel into the engine, the fuel injector being connected to the control unit;

[0044] If the continuously variable transmission slips at the first time, the control unit controls the instrument panel to display a warning indication;

[0045] Among them, the control unit adjusts the torque output by the engine according to the vehicle operation information at the first time, including: the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection amount of the injector of the all-terrain vehicle according to the vehicle operation information at the first time.

[0046] In some of the embodiments, if the all-terrain vehicle adopts an electronic throttle valve body, the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operation information at the first time: the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle according to the vehicle operation information at the first time, or the control unit adjusts the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operation information at the first time, or the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operation information at the first time;

[0047] If the all-terrain vehicle adopts a mechanical throttle valve body, the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection amount of the injector of the all-terrain vehicle according to the vehicle operation information at the first time: the control unit adjusts the fuel injection amount of the injector of the all-terrain vehicle according to the vehicle operation information at the first time.

[0048] In some embodiments, the vehicle operation information includes: the rotation speed of the driving wheel, the rotation speed of the driven wheel, the throttle opening of the throttle valve body, and the injection amount of the injector; the all-terrain vehicle also includes:

[0049] an engine speed detection device, capable of detecting the speed of the crankshaft of the engine at the first time, the engine speed detection device being connected to the control unit and capable of transmitting the speed of the crankshaft of the engine at the first time to the control unit; wherein the control unit is capable of determining the speed of the driving wheel at the first time according to the speed of the crankshaft of the engine at the first time;

[0050] a vehicle speed detection device, capable of detecting the vehicle speed of the all-terrain vehicle at the first time, the vehicle speed detection device being connected to the control unit and capable of transmitting the vehicle speed of the all-terrain vehicle at the first time to the control unit;

[0051] a gear position detection device, capable of detecting the gear position of the gear device at the first time, the gear position detection device being connected to the control unit and capable of transmitting the gear position of the gear device at the first time to the control unit; wherein the control unit is capable of determining the speed ratio of the gear device at the first time according to the gear position of the gear device at the first time, the control unit is capable of determining the rotation speed of the input shaft of the gear device at the first time according to the vehicle speed of the all-terrain vehicle at the first time and the speed ratio of the gear device at the first time, and determining the rotation speed of the driven wheel at the first time according to the rotation speed of the input shaft of the gear device at the first time;

[0052] a throttle detection device, capable of detecting a throttle opening of the throttle valve body at a first time, the throttle detection device being connected to the control unit and capable of transmitting the throttle opening of the throttle valve body at the first time to the control unit;

[0053] The fuel injection amount detection device can detect the fuel injection amount of the injector at the first time. The fuel injection amount detection device is connected to the control unit and can transmit the fuel injection amount of the injector at the first time to the control unit.

[0054] Compared with the related art, the all-terrain vehicle and the method for controlling the engine in the vehicle provided in the present embodiment obtain vehicle operation information of the vehicle at a first time, and obtain the speed ratio of the driving wheel to the driven wheel at the first time; according to the vehicle operation information at the first time, obtain a preset speed ratio range that matches the vehicle operation information at the first time; compare the speed ratio of the driving wheel to the driven wheel at the first time with the preset speed ratio range to determine whether the continuously variable transmission slips at the first time; if the continuously variable transmission slips at the first time, adjust the torque output by the engine according to the vehicle operation information at the first time, thereby solving the problem of transmission belt damage caused by slippage of the continuously variable transmission of the all-terrain vehicle.

[0055] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0057] Figure 1 It is an all-terrain vehicle structure in this embodiment;

[0058] Figure 2 is a schematic diagram of power transmission of the all-terrain vehicle in this embodiment;

[0059] Figure 3 is a flow chart of a method for controlling an engine in an all-terrain vehicle according to the present embodiment;

[0060] Figure 4 is a flow chart of obtaining the speed ratio of the driving wheel and the driven wheel at the first time in this embodiment;

[0061] Figure 5 is a flow chart of a method for controlling an engine in a vehicle according to the present embodiment;

[0062] Figure 6 is a block diagram of the structure of an all-terrain vehicle with an electronic throttle valve body in this embodiment;

[0063] Figure 7 is a block diagram of the structure of an all-terrain vehicle with a mechanical throttle valve body in this embodiment;

[0064] Figure 8 It is a schematic diagram of the internal structure of a control unit according to an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0066] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0067] In this embodiment, a method for controlling an engine in a vehicle is provided, wherein the vehicle is some wheeled vehicles having an engine, such as an all-terrain vehicle 100 . Figure 1 It is an all-terrain vehicle structure in this embodiment, such as Figure 1 As shown, the all-terrain vehicle 100 includes wheels 1 , a frame 2 and a power system 3 , wherein the power system 3 is disposed on the frame 2 , and the wheels 1 include a front wheel 11 and a rear wheel 12 . Figure 2Schematic diagram of power transmission of the all-terrain vehicle in this embodiment. Figure 2 As shown, the power system 3 includes an engine 31, a continuously variable transmission 32 and a gear device 33. One end of the continuously variable transmission 32 is connected to the engine 31, and the other end of the continuously variable transmission 32 is connected to the gear device 33. The continuously variable transmission 32 is used to transmit the torque output by the engine 31 to the gear device 33 to drive the all-terrain vehicle 100 to operate. The all-terrain vehicle 100 also includes a front wheel drive device 4 connected to the gear device 33 and a rear wheel drive device 5 connected to the gear device 33.

[0068] like Figure 2 As shown, the continuously variable transmission 32 includes a driving wheel 321, a driven wheel 322 and a transmission belt 323. The driving wheel 321 is connected to the crankshaft 311 of the engine 31 and rotates therewith. The driven wheel 322 is connected to the input shaft 331 of the gear device 33. The transmission belt 323 connects the driving wheel 321 and the driven wheel 322 and is used to transmit torque between the driving wheel 321 and the driven wheel 322. Figure 3 FIG. 1 is a flow chart of a method for controlling an engine in an all-terrain vehicle according to an embodiment of the present invention. Figure 3 As shown, the method for controlling the engine 31 in the all-terrain vehicle 100 includes the following steps:

[0069] Step S301, obtaining vehicle operation information of the vehicle at the first time, and obtaining the speed ratio of the driving wheel 321 and the driven wheel 322 at the first time. The vehicle operation information refers to information that can characterize the vehicle operation state. The vehicle operation information includes: the rotation speed of the driving wheel 321, the rotation speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the injection amount of the injector 63; and the vehicle operation information may also include other information that can characterize the vehicle operation state in addition to the rotation speed of the driving wheel 321, the rotation speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the injection amount of the injector 63.

[0070] It should be noted that the first time may refer to a certain moment or a certain period of time. For example, the first time may refer to the current moment or a certain period of time pushed forward from the current moment (for example, it may be a certain half hour). Furthermore, obtaining the vehicle operation information of the all-terrain vehicle 100 at the first moment and obtaining the speed ratio of the driving wheel 321 and the driven wheel 322 at the first moment is: obtaining the vehicle operation information of the all-terrain vehicle 100 at the current moment and obtaining the speed ratio of the driving wheel 321 and the driven wheel 322 at the current moment, or it may be: obtaining the vehicle operation information of the all-terrain vehicle 100 within a certain period of time and obtaining the speed ratio of the driving wheel 321 and the driven wheel 322 within a certain period of time. It should be further noted that the vehicle operation information within a certain period of time, such as the rotation speed of the driving wheel 321 within a certain period of time, may be the average value of the vehicle speed of the driving wheel 321 within the period of time; the speed ratio of the driving wheel 321 and the driven wheel 322 within a certain period of time may be the average value of the speed ratio of the driving wheel 321 and the driven wheel 322 within the period of time.

[0071] Step S302: acquiring a preset speed ratio range matching the vehicle operation information at the first time according to the vehicle operation information at the first time.

[0072] If the vehicle operation information of the all-terrain vehicle 100 is different, the speed ratio of the driving wheel 321 and the driven wheel 322 is also different. A large amount of vehicle operation information of the all-terrain vehicle 100 and the speed ratio of the driving wheel 321 and the driven wheel 322 can be collected in advance and summarized, and the summarized data is analyzed to determine the speed ratio of the driving wheel 321 and the driven wheel 322 corresponding to different vehicle operation information, and further determine the speed ratio range of the driving wheel 321 and the driven wheel 322 according to the speed ratio of the driving wheel 321 and the driven wheel 322, and the speed ratio range of the driving wheel 321 and the driven wheel 322 can be plus or minus 5% of the speed ratio of the driving wheel 321 and the driven wheel 322. Then, the speed ratio range of the driving wheel 321 and the driven wheel 322 corresponding to different vehicle operation information is pre-set. For example, a database may be pre-set, in which the speed ratio ranges of the driving wheel 321 and the driven wheel 322 corresponding to different vehicle operation information are stored; specifically, the speed ratio ranges of the driving wheel 321 and the driven wheel 322 corresponding to different speeds of the driving wheel 321, speeds of the driven wheel 322, throttle openings of the throttle valve body 62, and fuel injection amounts of the injector 63 may be stored.

[0073] Step S303, comparing the speed ratio between the driving wheel 321 and the driven wheel 322 at the first time with the preset speed ratio range to determine whether the continuously variable transmission 32 is slipping at the first time.

[0074] For example, if the speed ratio of the driving wheel 321 and the driven wheel 322 at the first time is within the preset speed ratio range, that is, the speed ratio of the driving wheel 321 and the driven wheel 322 at the first time is within plus or minus 5% of the preset speed ratio, it can be determined that the continuously variable transmission 32 is not slipping at the first time, otherwise it slips.

[0075] Step S304: if the continuously variable transmission 32 slips at the first time, the torque output by the engine 31 is adjusted according to the vehicle operation information at the first time.

[0076] Specifically, if it is determined that the continuously variable transmission 32 slips at the first time, the output torque of the engine 31 of the all-terrain vehicle 100 can be adjusted according to the vehicle operation information at the first time (for example, the speed of the driving wheel 321, the speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the injection amount of the injector 63) to solve the problem of the continuously variable transmission 32 slipping at the first time, thereby shortening the running time of the vehicle - the all-terrain vehicle 100 in the slipping state of the continuously variable transmission 32, avoiding the continuously variable transmission 32 from generating excessive heat, and solving the problem of damage to the transmission belt 323 caused by the slipping of the vehicle's continuously variable transmission 32.

[0077] In some embodiments, the method of controlling the engine 31 in the vehicle further includes:

[0078] If the continuously variable transmission 32 slips at the first time, the dashboard 61 of the control vehicle is controlled to display a warning indication;

[0079] For example, when the speed ratio at the first time is not within the preset speed ratio range, the vehicle's dashboard 61 displays an alarm indication, which is convenient for reminding the driver of the vehicle that the vehicle is in a slipping state, so that the driver can adjust the driving of the vehicle according to his own driving experience.

[0080] In some of the embodiments, adjusting the torque output by the engine 31 according to the vehicle operation information at the first time includes: adjusting the throttle opening of the vehicle's throttle valve body 62 and / or the fuel injection amount of the vehicle's injector 63 according to the vehicle operation information at the first time.

[0081] For example, if the vehicle operation information includes the rotation speed of the driving wheel 321, the rotation speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection amount of the injector 63, the vehicle's throttle valve body 62 and / or the vehicle's injector 63 are adjusted according to the rotation speed of the driving wheel 321, the rotation speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection amount of the injector 63 at the first time.

[0082] It should be noted that if the engine 31 of the vehicle, the all-terrain vehicle 100, adopts a mechanical throttle valve body 62, then when the continuously variable transmission 32 slips, the speed of the engine 31 is increased or decreased by adjusting the injection amount of the injector 63. If the engine 31 of the all-terrain vehicle 100 adopts an electronic throttle valve body 62, then when the continuously variable transmission 32 slips, the first case is: the speed of the engine 31 is increased or decreased by adjusting the injection amount of the injector 63 to solve the slip of the continuously variable transmission 32; the second case is: the speed of the engine 31 is increased or decreased by adjusting the electronic throttle opening to solve the slip of the continuously variable transmission 32; the third case is: the speed of the engine 31 is increased or decreased by adjusting the injection amount of the injector 63 and the throttle opening of the electronic throttle valve body 62 at the same time to solve the slip of the continuously variable transmission 32.

[0083] In some embodiments, obtaining the speed ratio between the driving wheel 321 and the driven wheel 322 at the first time includes:

[0084] The rotation speed of the crankshaft 311 of the engine 31 at the first time is obtained, and the speed of the all-terrain vehicle 100 at the first time is obtained; the rotation speed of the driving wheel 321 at the first time is determined according to the rotation speed of the crankshaft 311 at the first time, and the rotation speed of the driven wheel 322 at the first time is determined according to the speed of the all-terrain vehicle 100 at the first time. Specifically, because the driving wheel 321 is connected to the crankshaft 311 of the engine 31 and rotates with the crankshaft 311, the rotation speed of the crankshaft 311 at the first time is the rotation speed of the driving wheel 321 at the first time.

[0085] It should be noted that determining the rotational speed of the driven wheel 322 at the first time according to the vehicle speed of the all-terrain vehicle 100 at the first time includes: obtaining the gear position of the gear device 33 at the first time, and determining the speed ratio of the gear device 33 at the first time according to the gear position; determining the rotational speed of the input shaft 331 of the gear device 33 at the first time according to the vehicle speed of the all-terrain vehicle 100 at the first time and the speed ratio of the gear device 33 at the first time; determining the rotational speed of the driven wheel 322 at the first time according to the rotational speed of the input shaft 331 of the gear device 33 at the first time.

[0086] Specifically, the current speed ratio of the gear device 33 corresponds to the current gear position of the gear device 33, so the gear position of the gear device 33 of the all-terrain vehicle 100 is determined, and the speed ratio of the gear device 33 at this gear position is determined. Then, when the gear position of the gear device 33 at the first time is obtained, the speed ratio of the gear device 33 at the first time can be determined. It should be further explained that, when the speed ratio of the gear device 33 at the first time and the vehicle speed of the all-terrain vehicle 100 at the first time are known, the speed of the input shaft 331 of the gear device 33 at the first time can be determined. Because the driven wheel 322 in the continuously variable transmission 32 is connected to the input shaft 331 of the gear device 33, the speed of the driven wheel 322 in the continuously variable transmission 32 at the first time can be determined when the speed of the input shaft 331 of the gear device 33 at the first time is known; and then according to the speed of the driving wheel 321 at the first time and the speed of the driven wheel 322 at the first time, the speed ratio of the driving wheel 321 to the driven wheel 322 at the first time can be determined.

[0087] Figure 4 is a flow chart of obtaining the speed ratio of the driving wheel and the driven wheel at the first time in this embodiment, such as Figure 4 As shown, obtaining the speed ratio of the driving wheel 321 and the driven wheel 322 at the first time includes the following steps:

[0088] Step S3011, obtaining the rotation speed of the crankshaft 311 of the engine 31 at a first time and the speed of the vehicle at a first time;

[0089] Step S3012, determining the rotation speed of the driving wheel 321 at the first time according to the rotation speed of the crankshaft 311 at the first time;

[0090] Step S3013, obtaining the gear position of the gear device 33 at the first time, and determining the speed ratio of the gear device 33 at the first time according to the gear position;

[0091] Step S3014, determining the rotation speed of the input shaft 331 of the gear device 33 at the first time according to the vehicle speed of the all-terrain vehicle 100 at the first time and the speed ratio of the gear device 33 at the first time;

[0092] Step S3015, determining the rotation speed of the driven wheel 322 at the first time according to the rotation speed of the input shaft 331 of the gear device 33 at the first time;

[0093] Step S3016, determining the speed ratio of the driving wheel 321 to the driven wheel 322 at the first time according to the speed of the driving wheel 321 at the first time and the speed of the driven wheel 322 at the first time.

[0094] It should be noted that the rotation speed of the driving wheel 321 and the rotation speed of the driven wheel 322 in the vehicle operation information at the first time are also obtained through the above steps S3011 to S3015.

[0095] In some of these embodiments, Figure 5 is a flow chart of a method for controlling an engine in a vehicle according to this embodiment. Figure 5 As shown, the method for controlling the engine 31 in the vehicle includes the following steps:

[0096] Step S501, obtaining the vehicle speed of the all-terrain vehicle 100 at a first time, the gear position of the gear device 33 at a first time, the rotation speed of the crankshaft 311 of the engine 31 at a first time, the throttle opening of the throttle valve body 62 at a first time, and the injection amount of the injector 63 at a first time.

[0097] Step S502, determining the speed ratio of the gear device 33 at the first time according to the gear position, and determining the rotational speed of the driven wheel 322 at the first time according to the vehicle speed of the all-terrain vehicle 100 at the first time and the speed ratio of the gear device 33 at the first time, determining the rotational speed of the driving wheel 321 at the first time according to the rotational speed of the crankshaft 311 of the engine 31 at the first time, and further determining the speed ratio between the driving wheel 321 and the driven wheel 322 at the first time according to the rotational speed of the driving wheel 321 at the first time and the rotational speed of the driven wheel 322 at the first time.

[0098] Step S503, obtaining a preset speed ratio range that matches the rotation speed of the driving wheel 321, the rotation speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the injection amount of the injector 63 at the first time.

[0099] Step S504, comparing the speed ratio between the driving wheel 321 and the driven wheel 322 at the first time with the preset speed ratio range to determine whether the continuously variable transmission 32 is slipping at the first time.

[0100] Step S505, if the CVT 32 slips at the first time, the instrument panel 61 gives an alarm indication, and adjusts the vehicle's throttle valve body 62 and / or the vehicle's injector 63 according to the speed of the driving wheel 321, the speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the injection amount of the injector 63 at the first time until the CVT 32 stops slipping, then the process ends.

[0101] In addition, obtaining the vehicle speed of the ATV 100 at the first time includes: determining the vehicle speed of the ATV 100 at the first time by using the vehicle speed detection device 65; for example, the vehicle speed detection device 65 is a vehicle speed sensor.

[0102] Acquiring the rotation speed of the crankshaft 311 of the engine 31 at the first time includes: determining the rotation speed of the crankshaft 311 of the engine 31 at the first time by the engine rotation speed detection device 66; for example, the engine rotation speed detection device 66 is an engine rotation speed sensor.

[0103] Acquiring the gear position of the gear device 33 at the first time includes: determining the gear position of the gear device 33 at the first time by the gear position detection device 67; for example, the gear position detection device 67 is a gear position sensor.

[0104] Acquiring the throttle opening of the throttle valve body 62 at the first time includes: determining the throttle opening of the throttle valve body 62 at the first time through the throttle detection device 64; for example, the throttle detection device 64 is a sensor located at the throttle valve body 62 for detecting the throttle opening.

[0105] Obtaining the fuel injection amount of the fuel injector 63 at the first time includes: determining the fuel injection amount of the fuel injector 63 at the first time through the fuel injection amount detection device 68; for example, the fuel injection amount detection device 68 is a sensor located at the fuel injector 63 for detecting the fuel injection amount. Optionally, the fuel injection amount of the fuel injector 63 at the first time can also be determined by the oxygen sensor on the muffler; specifically, the oxygen sensor on the muffler transmits its detection signal to the control unit 7, the control unit 7 calculates information such as the air-fuel ratio, and then adjusts the fuel injection amount of the fuel injector 63. For example, assuming that the oxygen content detected by the oxygen sensor is high as a high voltage signal, the control unit 7 gives an instruction to increase the fuel injection amount. Assuming that the oxygen content detected by the oxygen sensor is low as a low voltage signal, the control unit 7 gives an instruction to reduce the fuel injection amount.

[0106] It should be noted that the steps shown in the above process or the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0107] In this embodiment, an all-terrain vehicle 100 is also provided. The structure of the all-terrain vehicle 100 is as follows: Figure 1 As shown, the all-terrain vehicle 100 includes wheels 1 , a frame 2 and a power system 3 , wherein the power system 3 includes an engine 31 , a continuously variable transmission 32 and a gear device 33 .

[0108] The continuously variable transmission 32 includes:

[0109] The driving wheel 321 is connected to the crankshaft 311 of the engine 31 .

[0110] The driven wheel 322 is connected to the input shaft 331 of the gear device 33 .

[0111] The transmission belt 323 connects the driving wheel 321 and the driven wheel 322 and is used to transmit torque between the driving wheel 321 and the driven wheel 322; the all-terrain vehicle 100 also includes a control unit 7. It should be noted that the control unit 7 can be configured to run a computer program to execute the steps in any of the above method embodiments.

[0112] Specifically, the control unit 7 obtains the vehicle operation information of the all-terrain vehicle 100 at the first time, and obtains the speed ratio of the driving wheel 321 and the driven wheel 322 at the first time. The control unit 7 also obtains a preset speed ratio range that matches the vehicle operation information at the first time based on the vehicle operation information at the first time. The control unit 7 also compares the speed ratio at the first time with the preset speed ratio range to determine whether the continuously variable transmission 32 slips at the first time; if the continuously variable transmission 32 slips at the first time, the control unit 7 adjusts the torque output by the engine 31 according to the vehicle operation information at the first time.

[0113] In some embodiments, the all-terrain vehicle 100 further includes:

[0114] The instrument panel 61 is connected to the control unit 7; if the continuously variable transmission 32 slips at the first time, the control unit 7 controls the instrument panel 61 to display an alarm indication.

[0115] The throttle valve body 62 is used to control the air intake into the engine 31 , and the throttle valve body 62 is connected to the control unit 7 .

[0116] The fuel injector 63 is used to control the injection of fuel into the engine 31 , and the fuel injector 63 is connected to the control unit 7 .

[0117] The ATV 100 also includes:

[0118] The engine speed detection device 66 can detect the speed of the crankshaft 311 of the engine 31 at the first time. The engine speed detection device 66 is connected to the control unit 7, and can transmit the speed of the crankshaft 311 of the engine 31 at the first time to the control unit 7; wherein the control unit 7 can determine the speed of the driving wheel 321 at the first time according to the speed of the crankshaft 311 of the engine 31 at the first time.

[0119] The vehicle speed detection device 65 can detect the vehicle speed of the all-terrain vehicle 100 at a first time. The vehicle speed detection device 65 is connected to the control unit 7 and can transmit the vehicle speed of the all-terrain vehicle 100 at the first time to the control unit 7.

[0120] The gear position detection device 67 is capable of detecting the gear position of the gear device 33 at the first time. The gear position detection device 67 is connected to the control unit 7 and is capable of transmitting the gear position of the gear device 33 at the first time to the control unit 7; wherein the control unit 7 is capable of determining the speed ratio of the gear device 33 at the first time according to the gear position of the gear device 33 at the first time, and the control unit 7 is capable of determining the rotation speed of the input shaft 331 of the gear device 33 at the first time according to the vehicle speed of the all-terrain vehicle 100 at the first time and the speed ratio of the gear device 33 at the first time, and determining the rotation speed of the driven wheel 322 at the first time according to the rotation speed of the input shaft 331 of the gear device 33 at the first time; further, the control unit 7 is also capable of determining the speed ratio of the driving wheel 321 to the driven wheel 322 at the first time according to the rotation speed of the driving wheel 321 at the first time and the rotation speed of the driven wheel 322 at the first time.

[0121] A throttle detection device 64, capable of detecting a throttle opening of the throttle valve body 62 at a first time, the throttle detection device 64 is connected to the control unit 7, and capable of transmitting the throttle opening of the throttle valve body 62 at the first time to the control unit 7;

[0122] The fuel injection amount detection device 68 can detect the fuel injection amount of the injector 63 at the first time. The fuel injection amount detection device 68 is connected to the control unit 7 and can transmit the fuel injection amount of the injector 63 at the first time to the control unit 7.

[0123] In some embodiments, the control unit 7 adjusts the torque output by the engine 31 according to the vehicle operation information at the first time, including: the control unit 7 adjusts the throttle valve body 62 of the all-terrain vehicle 100 and / or the injector 63 of the all-terrain vehicle 100 according to the vehicle operation information at the first time. For example, the control unit 7 can adjust the throttle valve body 62 of the all-terrain vehicle 100 and / or the injector 63 of the all-terrain vehicle 100 according to the speed of the driving wheel 321, the speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the injection amount of the injector 63 at the first time.

[0124] It should be noted that Figure 6 : is a structural block diagram of an all-terrain vehicle with an electronic throttle valve body in this embodiment, such as Figure 6As shown, if the engine 31 of the all-terrain vehicle 100 adopts an electronic throttle valve body 62, the electronic throttle valve body 62 is connected to the control unit 7. When the continuously variable transmission 32 slips, in the first case, the control unit 7 increases or decreases the speed of the engine 31 by adjusting the injection amount of the injector 63 to solve the slip of the continuously variable transmission 32; in the second case, the control unit 7 increases or decreases the speed of the engine 31 by adjusting the throttle opening of the electronic throttle valve body 62 to solve the slip of the continuously variable transmission 32; in the third case, the control unit 7 increases or decreases the speed of the engine 31 by adjusting the injection amount of the injector 63 and the throttle opening of the electronic throttle valve body 62 at the same time to solve the slip of the continuously variable transmission 32.

[0125] It should be noted that Figure 7 : is a structural block diagram of an all-terrain vehicle with a mechanical throttle valve body in this embodiment, such as Figure 7 As shown, if the engine 31 of the all-terrain vehicle 100 adopts a mechanical throttle valve body 62, since the throttle opening of the mechanical throttle valve body 62 is controlled by the driver, the speed of the engine 31 can be increased or decreased by adjusting the injection amount of the injector 63 when the continuously variable transmission 32 slips.

[0126] In some of these embodiments, Figure 8 is a schematic diagram of the internal structure of a control unit according to an embodiment of the present application, such as Figure 8 As shown, the control unit 7 includes a processor 71, a memory 73 and a network interface 74 that can be connected via an internal bus 72. The processor 71 can be one or more, and the processor 71 can include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The memory 73 can be used to store computer programs, for example, a computer program corresponding to the method for controlling the engine 31 in the vehicle in the present embodiment. The processor 71 executes various functional applications and data processing by running the computer program stored in the memory 73, that is, implementing the above method. The memory 73 may include a high-speed random access memory 73, and may also include a non-volatile memory 73, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory 73. In some instances, the memory 73 may further include a memory 73 remotely arranged relative to the processor 71, and these remote memories 73 can be connected to the terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, corporate intranets, local area networks, mobile communication networks and combinations thereof. The network interface 74 is used to communicate with an external terminal via a network connection. It can be understood by a person of ordinary skill in the art that Figure 8 The structure of the control unit 7 shown is only for illustration and does not limit the structure of the control unit 7. For example, the control unit 7 may also include Figure 8More or fewer components as shown, or with Figure 8 Different configurations shown.

[0127] It should be understood that the specific embodiments described here are only used to explain this application, rather than to limit it. According to the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0128] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0129] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0130] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A method for controlling an engine in a vehicle, the vehicle comprising the engine, a continuously variable transmission and a gear device, one end of the continuously variable transmission being connected to the engine, the other end of the continuously variable transmission being connected to the gear device, the continuously variable transmission being used to transmit the torque output by the engine to the gear device, and the gear device driving the vehicle to run; The continuously variable transmission comprises: A driving wheel connected to the crankshaft of the engine; A driven wheel connected to the input shaft of the gear device; A transmission belt connects the driving wheel and the driven wheel and is used to transmit torque between the driving wheel and the driven wheel; characterized in that the method includes: Acquire vehicle operation information of the vehicle at a first time, and acquire the speed ratio of the driving wheel to the driven wheel at the first time; acquiring the speed ratio of the driving wheel to the driven wheel at the first time includes: acquiring the rotation speed of the crankshaft of the engine at the first time and the speed of the vehicle at the first time; determining the rotation speed of the driving wheel at the first time according to the rotation speed of the crankshaft at the first time, and determining the rotation speed of the driven wheel at the first time according to the speed of the vehicle at the first time; determining the speed ratio of the driving wheel to the driven wheel at the first time according to the rotation speed of the driving wheel at the first time and the rotation speed of the driven wheel at the first time ; Wherein, determining the rotation speed of the driven wheel at the first time according to the vehicle speed at the first time includes: obtaining the gear position of the gear device at the first time, and determining the speed ratio of the gear device at the first time according to the gear position; determining the rotation speed of the input shaft of the gear device at the first time according to the vehicle speed at the first time and the speed ratio of the gear device at the first time; determining the rotation speed of the driven wheel at the first time according to the rotation speed of the input shaft of the gear device at the first time; the vehicle operation information includes: the rotation speed of the driving wheel, the rotation speed of the driven wheel, the throttle opening of the throttle valve body, and the fuel injection amount of the injector; According to the vehicle operation information at the first time, obtaining a preset speed ratio range matching the vehicle operation information at the first time; Comparing the speed ratio between the driving wheel and the driven wheel at the first time with the preset speed ratio range to determine whether the continuously variable transmission is slipping at the first time; If the continuously variable transmission slips at the first time, the torque output by the engine is adjusted according to the vehicle operation information at the first time.

2. The method according to claim 1, characterized in that Acquiring the speed of the vehicle at the first time includes: determining the speed of the vehicle at the first time by a speed detection device; Acquiring the rotation speed of the crankshaft of the engine at the first time includes: determining the rotation speed of the crankshaft of the engine at the first time by an engine rotation speed detection device; Acquiring the gear position of the gear device at the first time includes: determining the gear position of the gear device at the first time by a gear device gear position detection device.

3. The method according to claim 1, characterized in that The method further comprises: If the continuously variable transmission slips at the first time, controlling the instrument panel of the vehicle to display a warning indication; Wherein, adjusting the torque output by the engine according to the vehicle operation information at the first time includes: adjusting the throttle opening of the throttle valve body of the vehicle and / or the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time.

4. The method according to claim 3, characterized in that If the vehicle adopts an electronic throttle valve body, adjusting the throttle opening of the throttle valve body of the vehicle and / or the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time is: adjusting the throttle opening of the throttle valve body of the vehicle according to the vehicle operation information at the first time, or adjusting the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time, or adjusting the throttle opening of the throttle valve body of the vehicle and the fuel injection amount of the fuel injector of the vehicle according to the vehicle operation information at the first time; If the vehicle adopts a mechanical throttle valve body, adjusting the throttle opening of the throttle valve body of the vehicle and / or the fuel injection amount of the vehicle's injector according to the vehicle operation information at the first time is: adjusting the fuel injection amount of the vehicle's injector according to the vehicle operation information at the first time.

5. An all-terrain vehicle, comprising an engine, a continuously variable transmission and a gear device, wherein one end of the continuously variable transmission is connected to the engine, and the other end of the continuously variable transmission is connected to the gear device, and the continuously variable transmission is used to transmit the power output by the engine to the gear device, and the gear device drives the all-terrain vehicle to run; The continuously variable transmission comprises: A driving wheel connected to the crankshaft of the engine; A driven wheel connected to the input shaft of the gear device; a transmission belt connecting the driving wheel and the driven wheel and used to transmit torque between the driving wheel and the driven wheel; characterized in that the all-terrain vehicle also includes a control unit; The control unit obtains vehicle operation information of the all-terrain vehicle at a first time and obtains the speed ratio of the driving wheel to the driven wheel at the first time; the vehicle operation information includes: the speed of the driving wheel, the speed of the driven wheel, the throttle opening of the throttle valve body, and the injection amount of the injector; the all-terrain vehicle also includes: an engine speed detection device, which can detect the speed of the crankshaft of the engine at the first time, and the engine speed detection device is connected to the control unit and can transmit the speed of the crankshaft of the engine at the first time to the control unit; wherein the control unit can determine the speed of the driving wheel at the first time according to the speed of the crankshaft of the engine at the first time; a vehicle speed detection device, which can detect the speed of the all-terrain vehicle at the first time, and the vehicle speed detection device is connected to the control unit and can transmit the speed of the all-terrain vehicle at the first time to the control unit; a gear position detection device, which can detect the gear position of the gear device at the first time, and the gear position detection device can detect the gear position of the gear device at the first time. a wheel gear position detection device connected to the control unit, capable of transmitting the gear position of the gear device at the first time to the control unit; wherein the control unit can determine the speed ratio of the gear device at the first time according to the gear position of the gear device at the first time, and the control unit can determine the rotation speed of the input shaft of the gear device at the first time according to the vehicle speed of the all-terrain vehicle at the first time and the speed ratio of the gear device at the first time, and determine the rotation speed of the driven wheel at the first time according to the rotation speed of the input shaft of the gear device at the first time; a throttle detection device, capable of detecting the throttle opening of the throttle valve body at the first time, the throttle detection device is connected to the control unit, capable of transmitting the throttle opening of the throttle valve body at the first time to the control unit; a fuel injection amount detection device, capable of detecting the fuel injection amount of the injector at the first time, the fuel injection amount detection device is connected to the control unit, and capable of transmitting the fuel injection amount of the injector at the first time to the control unit; The control unit also acquires a preset speed ratio range matching the vehicle operation information at the first time according to the vehicle operation information at the first time; The control unit also compares the speed ratio between the driving wheel and the driven wheel at the first time with the preset speed ratio range to determine whether the continuously variable transmission slips at the first time; If the continuously variable transmission slips at the first time, the control unit adjusts the torque output by the engine according to the vehicle operation information at the first time.

6. The all-terrain vehicle according to claim 5, characterized in that: The all-terrain vehicle also includes: an instrument panel connected to the control unit; a throttle valve body for controlling air intake into said engine; A fuel injector, used to control the injection of fuel into the engine, the fuel injector being connected to the control unit; If the continuously variable transmission slips at the first time, the control unit controls the instrument panel to display a warning indication; Among them, the control unit adjusts the torque output by the engine according to the vehicle operation information at the first time, including: the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection amount of the injector of the all-terrain vehicle according to the vehicle operation information at the first time.

7. The all-terrain vehicle according to claim 6, characterized in that: If the all-terrain vehicle adopts an electronic throttle valve body, the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operation information at the first time: the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle according to the vehicle operation information at the first time, or the control unit adjusts the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operation information at the first time, or the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operation information at the first time; If the all-terrain vehicle adopts a mechanical throttle valve body, the control unit adjusts the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection amount of the injector of the all-terrain vehicle according to the vehicle operation information at the first time: the control unit adjusts the fuel injection amount of the injector of the all-terrain vehicle according to the vehicle operation information at the first time.

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