An all-terrain vehicle and a method for controlling an engine in a vehicle

Abstract

The application relates to an all-terrain vehicle and a method for controlling an engine in the vehicle, wherein the method for controlling the engine in the vehicle comprises the following steps: acquiring vehicle running information of the vehicle at a first time, acquiring environment temperature information of the continuously variable transmission at the first time; acquiring pre-set environment temperature information matched with the vehicle running information at the first time according to the vehicle running information at the first time; comparing the environment temperature information of the continuously variable transmission at the first time with the pre-set environment temperature information, and determining whether the continuously variable transmission slips at the first time; and if the continuously variable transmission slips at the first time, adjusting the torque output by the engine according to the vehicle running information at the first time. Through the application, the problem of transmission belt damage caused by the slipping of the continuously variable transmission of the all-terrain vehicle is solved.

Description

Technical Field

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

[0002] Some wheeled vehicles with engines, such as all-terrain vehicles, are equipped with continuously variable transmissions (CVTs) to transmit torque from the engine to the wheels. The CVT has a drive pulley, a driven pulley, and a drive belt that wraps around the drive pulley and driven pulley to transmit torque.

[0003] In one scenario, significant slippage may occur between the drive belt and the driving and driven pulleys at the start of vehicle operation, continuing until the drive belt synchronizes with them. In another scenario, when the vehicle is under load, such as when pulling a heavy load or traversing deep mud or sand, significant slippage may occur between the drive belt and one or both of the driving pulleys. If the vehicle is operated in a slipping state for an extended period, the continuously variable transmission (CVT) will generate excessive heat. Furthermore, considering the reduced transmission efficiency of the CVT after the drive belt slips, drivers may sometimes respond by increasing the throttle, resulting in increased belt temperature and a greater likelihood of slippage, ultimately leading to severe belt damage.

[0004] In conclusion, there is currently no effective solution to the problem of drive belt damage caused by slippage in continuously variable transmissions (CVTs) in vehicles. Summary of the Invention

[0005] This embodiment provides an all-terrain vehicle and a method for controlling the engine in the vehicle, which solves the problem of transmission belt damage caused by slippage of the continuously variable transmission (CVT) in the all-terrain vehicle.

[0006] In the first aspect, this embodiment provides a method for controlling an engine in a vehicle, the vehicle including the engine, a continuously variable transmission (CVT), and a gear assembly, one end of the CVT being connected to the engine, and the other end of the CVT being connected to the gear assembly, the CVT being used to transmit the torque output by the engine to the gear assembly, the gear assembly driving the vehicle to run;

[0007] The continuously variable transmission includes:

[0008] The drive wheel is connected to the crankshaft of the engine;

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

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

[0011] Obtain the vehicle's operating information at a first moment, and obtain the ambient temperature information of the continuously variable transmission at the first moment;

[0012] Based on the vehicle operation information at the first time, obtain the pre-set ambient temperature information that matches the vehicle operation information at the first time;

[0013] The ambient temperature information of the continuously variable transmission at the first time is compared with the preset ambient temperature information to determine whether the continuously variable transmission slips at the first time.

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

[0015] In some embodiments, the ambient temperature information of the continuously variable transmission (CVT) at the first time is obtained by using a temperature detection device located inside the CVT.

[0016] In some embodiments, if the vehicle operation information includes the rotational speed of the driving wheel and the rotational speed of the driven wheel, then obtaining the rotational speed of the driving wheel at the first time interval includes:

[0017] The rotational speed of the crankshaft of the engine at the first time is obtained, and the rotational speed of the drive wheel at the first time is determined based on the rotational speed of the crankshaft at the first time.

[0018] Obtaining the rotational speed of the driven wheel at the first time interval includes:

[0019] The vehicle speed at the first time point is obtained, and the rotational speed of the driven wheel at the first time point is determined based on the vehicle speed at the first time point.

[0020] Determining the rotational speed of the driven wheel at the first time based on the vehicle's speed at the first time includes:

[0021] The gear position of the gear device at the first time is obtained and the speed ratio of the gear device at the first time is determined based on the gear position. The rotational speed of the input shaft of the gear device at the first time is determined based on the vehicle speed at the first time and the speed ratio of the gear device at the first time. The rotational speed of the driven wheel at the first time is determined based on the rotational speed of the input shaft of the gear device at the first time.

[0022] In some embodiments, obtaining the vehicle speed at the first time interval includes: determining the vehicle speed at the first time interval using a vehicle speed detection device;

[0023] Obtaining the rotational speed of the engine crankshaft at the first time includes: determining the rotational speed of the engine crankshaft at the first time using an engine speed detection device;

[0024] Obtaining 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 means of a gear device gear position detection device.

[0025] In some embodiments, the method further includes:

[0026] If the continuously variable transmission slips in the first instant, the instrument panel of the vehicle can be controlled to display an alarm indication;

[0027] The adjustment of the engine output torque based on the vehicle operation information at the first time includes: adjusting the throttle valve opening of the vehicle's throttle valve body and / or the fuel injection quantity of the vehicle's fuel injectors based on the vehicle operation information at the first time.

[0028] In some of these embodiments, if the vehicle uses an electronic throttle valve body, the throttle opening of the throttle valve body and / or the fuel injection quantity of the vehicle's injectors are adjusted based on the vehicle's operating information at the first time.

[0029] If the vehicle uses a mechanical throttle valve body, the fuel injection quantity of the vehicle's injectors is adjusted according to the vehicle's operating information at the first time.

[0030] Secondly, this embodiment provides an all-terrain vehicle, which includes an engine, a continuously variable transmission (CVT), and a gear unit. One end of the CVT is connected to the engine, and the other end of the CVT is connected to the gear unit. The CVT is used to transmit the power output by the engine to the gear unit, and the gear unit drives the all-terrain vehicle to operate.

[0031] The continuously variable transmission includes:

[0032] The drive wheel is connected to the crankshaft of the engine;

[0033] The driven wheel is connected to the input shaft of the gear device;

[0034] A drive belt connects the driving pulley and the driven pulley, and is used to transmit torque between the driving pulley and the driven pulley; characterized in that the all-terrain vehicle further includes a control unit;

[0035] The control unit acquires the vehicle operation information of the all-terrain vehicle at the first moment and the ambient temperature information of the continuously variable transmission at the first moment;

[0036] The control unit also obtains pre-set ambient temperature information that matches the vehicle operation information at the first time, based on the vehicle operation information at the first time.

[0037] The control unit also compares the ambient temperature information of the continuously variable transmission at the first time with the preset ambient temperature information to determine whether the continuously variable transmission slips at the first time.

[0038] If the continuously variable transmission slips at the first moment, the control unit adjusts the torque output by the engine based on the vehicle operation information at the first moment.

[0039] In some embodiments, the all-terrain vehicle further includes:

[0040] The dashboard is connected to the control unit;

[0041] Throttle valve body, used to control the intake of air into the engine;

[0042] A fuel injector for controlling the injection of fuel into the engine, the fuel injector being connected to the control unit;

[0043] If the continuously variable transmission slips at the first moment, the control unit can control the instrument panel to display an alarm indication;

[0044] The control unit adjusts the torque output of the engine based on the vehicle operation information at the first time, which includes: the control unit adjusting the throttle opening of the throttle valve body of the all-terrain vehicle and / or the fuel injection quantity of the fuel injector of the all-terrain vehicle based on the vehicle operation information at the first time.

[0045] In some embodiments, if the all-terrain vehicle uses an electronic throttle body, the control unit adjusts the throttle opening of the all-terrain vehicle's throttle body and / or the fuel injection quantity of the all-terrain vehicle's injector based on the vehicle's operating information at the first time.

[0046] If the all-terrain vehicle uses a mechanical throttle body, the control unit adjusts the fuel injection quantity of the all-terrain vehicle's injectors based on the vehicle's operating information at the first time.

[0047] In some embodiments, the all-terrain vehicle further includes:

[0048] An engine speed detection device is capable of detecting the speed of the engine crankshaft at the first time. The engine speed detection device is connected to the control unit and can transmit the speed of the engine crankshaft at the first time to the control unit. The control unit can determine the speed of the drive wheel at the first time based on the speed of the engine crankshaft at the first time.

[0049] The vehicle speed detection device is capable of detecting the speed of the all-terrain vehicle at the first time. 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.

[0050] A gear position detection device is provided, capable of detecting the gear position of the gear assembly at the first time. The gear position detection device is connected to the control unit and can transmit the gear position of the gear assembly at the first time to the control unit. The control unit can determine the gear ratio of the gear assembly at the first time based on the gear position of the gear assembly at the first time. The control unit can also determine the rotational speed of the input shaft of the gear assembly at the first time based on the vehicle speed of the all-terrain vehicle at the first time and the gear ratio of the gear assembly at the first time, and determine the rotational speed of the driven wheel at the first time based on the rotational speed of the input shaft of the gear assembly at the first time.

[0051] A temperature detection device is installed inside the continuously variable transmission (CVT) and can detect the ambient temperature information of the CVT at the first time. The temperature detection device is connected to the control unit and can transmit the ambient temperature information of the CVT at the first time to the control unit.

[0052] Compared with related technologies, the all-terrain vehicle and the method for controlling the engine in the vehicle provided in this embodiment obtain the vehicle's operating information at a first time, and obtain the ambient temperature information of the continuously variable transmission (CVT) at the first time; obtain pre-set ambient temperature information that matches the vehicle's operating information at the first time; compare the ambient temperature information of the CVT at the first time with the pre-set ambient temperature information to determine whether the CVT slips at the first time; if the CVT slips at the first time, adjust the torque output of the engine according to the vehicle's operating information at the first time, thus solving the problem of transmission belt damage caused by CVT slippage in all-terrain vehicles.

[0053] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0054] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0055] Figure 1 This is an all-terrain vehicle structure in this embodiment;

[0056] Figure 2 This is a schematic diagram of the power transmission of the all-terrain vehicle in this embodiment;

[0057] Figure 3 This is a flowchart of the method for controlling the engine in an all-terrain vehicle according to this embodiment;

[0058] Figure 4 This is a schematic diagram of the continuously variable transmission (CVT) in this embodiment;

[0059] Figure 5 This is a flowchart of obtaining the rotational speeds of the driving wheel and the driven wheel at the first moment in this embodiment;

[0060] Figure 6 This is a flowchart of a method for controlling the engine in a vehicle according to this embodiment;

[0061] Figure 7 This is a structural block diagram of the all-terrain vehicle with an electronic throttle valve body in this embodiment;

[0062] Figure 8 This is a structural block diagram of the all-terrain vehicle with a mechanical throttle valve body in this embodiment;

[0063] Figure 9 This is a schematic diagram of the internal structure of the control unit according to an embodiment of this application. Detailed Implementation

[0064] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0065] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning as understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these,” used in this application, do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” and “coupled,” used in this application, are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The term “multiple” used in this application refers to two or more. The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. Typically, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," and "third," etc., used in this application are merely for distinguishing similar objects and do not represent a specific ordering of the objects.

[0066] This embodiment provides a method for controlling an engine in a vehicle, wherein the vehicle is a wheeled vehicle with an engine, such as an all-terrain vehicle. Figure 1 This embodiment describes an all-terrain vehicle structure, 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 mounted on the frame 2, and the wheels 1 include front wheels 11 and rear wheels 12. Figure 2 This is a schematic diagram of the power transmission of the all-terrain vehicle in this embodiment, as shown below. Figure 2 As shown, the power system 3 includes an engine 31, a continuously variable transmission (CVT) 32, and a gear assembly 33. One end of the CVT 32 is connected to the engine 31, and the other end is connected to the gear assembly 33. The CVT 32 is used to transmit the torque output by the engine 31 to the gear assembly 33 to drive the all-terrain vehicle 100. The all-terrain vehicle 100 also includes a front-wheel drive unit 4 connected to the gear assembly 33 and a rear-wheel drive unit 5 connected to the gear assembly 33.

[0067] like Figure 2As shown, the continuously variable transmission 32 includes a drive pulley 321, a driven pulley 322, and a drive belt 323. The drive pulley 321 is connected to and rotates with the crankshaft 311 of the engine 31. The driven pulley 322 is connected to the input shaft 331 of the gear unit 33. The drive belt 323 connects the drive pulley 321 and the driven pulley 322 and is used to transmit torque between the drive pulley 321 and the driven pulley 322. Figure 3 This is a flowchart of the method for controlling the engine in an all-terrain vehicle according to this embodiment, such as... Figure 3 As shown, the method for controlling the engine 31 in the all-terrain vehicle 100 includes the following steps:

[0068] Step S301: Obtain vehicle operation information at a first-time moment, including the ambient temperature information of the continuously variable transmission (CVT) 32 at the first-time moment. The vehicle operation information refers to information that characterizes the vehicle's operating state. For example, the vehicle operation information may include at least one of the following: the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63. Preferably, the vehicle operation information includes: the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63. Further, the vehicle operation information may also include other parameters that characterize the vehicle's operating state besides the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63. The ambient temperature information of the CVT 32 may refer to the temperature value inside the CVT 32 housing 324.

[0069] It should be noted that "first time" can refer to a certain period of time, such as a time period that is pushed back from the current moment (e.g., one minute). Further explanation is needed: vehicle operating information within a certain period, such as the rotational speed of the drive wheel 321 within that period, can be the average rotational speed of the drive wheel 321 within that period; the ambient temperature information of the continuously variable transmission (CVT) 32 within a certain period can be the temperature curve or average temperature value inside the CVT 32 housing 324 within that period.

[0070] Step S302: Based on the vehicle operation information at the first moment, obtain the pre-set ambient temperature information that matches the vehicle operation information at the first moment.

[0071] Specifically, if the vehicle operating information of the all-terrain vehicle 100 is different, the ambient temperature information of the continuously variable transmission (CVT) 32 will also be different. A large amount of vehicle operating information of the all-terrain vehicle 100 and ambient temperature information of the CVT 32 can be collected in advance and summarized. After analyzing the summarized data, the ambient temperature information of the CVT 32 corresponding to different vehicle operating information can be determined. For example, a database can be pre-set, which stores the ambient temperature information of the CVT 32 corresponding to different vehicle operating information; specifically, this could be the ambient temperature information of the CVT 32 corresponding to different rotational speeds of the drive wheel 321, driven wheel 322, throttle valve opening of the throttle body 62, and fuel injection quantity of the injector 63.

[0072] Step S303: Compare the ambient temperature information of the continuously variable transmission 32 at the first moment with the preset ambient temperature information to determine whether the continuously variable transmission 32 slips at the first moment.

[0073] For example, if the ambient temperature information of the continuously variable transmission 32 at the first moment is within ±10% or 5% of the preset ambient temperature information, it can be determined that the continuously variable transmission 32 is not slipping at the first moment; otherwise, it is slipping.

[0074] In step S304, if the continuously variable transmission 32 slips at the first moment, the torque output of the engine 31 is adjusted according to the vehicle operation information at the first moment.

[0075] Specifically, if it is determined that the continuously variable transmission (CVT) 32 slips at the first moment, the output torque of the all-terrain vehicle 100 engine 31 can be adjusted according to the vehicle's operating information at the first moment (e.g., the speed of the drive wheel 321, the speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63) to solve the problem of the CVT 32 slipping at the first moment. This can shorten the operating time of the vehicle—the all-terrain vehicle 100—in the slipping state of the CVT 32, avoid the CVT 32 generating too much heat, and solve the problem of damage to the transmission belt 323 caused by the slipping of the CVT 32.

[0076] In some embodiments, the ambient temperature information of the continuously variable transmission 32 at the first moment is obtained by using a temperature detection device 327 located inside the continuously variable transmission 32.

[0077] Specifically, Figure 4 This is a schematic diagram of the continuously variable transmission (CVT) in this embodiment, as shown below. Figure 4As shown, the temperature detection device 327 can be a temperature sensor, which can be installed on the inner wall of the continuously variable transmission (CVT) housing 324 to detect the ambient temperature of the CVT 32. It should be noted that, considering that the CVT housing 324 has an air inlet 326 and an air outlet 325, in order to make the ambient temperature detected by the temperature sensor closer to the temperature inside the CVT housing 324, the temperature sensor is installed away from the air inlet 326 and the air outlet 325 and close to the drive belt 323.

[0078] It should be noted that if the ambient temperature information of the continuously variable transmission 32 is the average temperature over a period of time, and the average temperature at the first moment is within ±10% or 5% of the preset average ambient temperature, it can be determined that the continuously variable transmission 32 does not slip at the first moment; otherwise, it will slip.

[0079] In some embodiments, the method for controlling the engine 31 in the vehicle further includes:

[0080] If the continuously variable transmission 32 slips immediately, the instrument panel 61 controlling the vehicle will display a warning indicator.

[0081] For example, if the ambient temperature information at the first moment does not match the preset ambient temperature information, the vehicle's instrument panel 61 will display a warning indicator. This warning indicator can help remind the driver that the vehicle is in a slippery state, so that the driver can adjust the driving of the vehicle based on their own driving experience.

[0082] In some embodiments, adjusting the torque output of engine 31 based on the vehicle operating information at a first time includes adjusting the throttle opening of the vehicle's throttle valve body 62 and / or the fuel injection quantity of the vehicle's fuel injector 63 based on the vehicle operating information at a first time.

[0083] For example, if the vehicle operating information includes the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63, then the throttle valve body 62 and / or the injector 63 of the vehicle are adjusted according to the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63 at the first moment.

[0084] It should be noted that if the engine 31 of the all-terrain vehicle 100 uses a mechanical throttle body 62, then when the continuously variable transmission (CVT) 32 slips, the engine speed of the engine 31 is increased or decreased by adjusting the fuel injection quantity of the injector 63. If the engine 31 of the all-terrain vehicle 100 uses an electronic throttle body 62, then when the CVT 32 slips, there are three scenarios: First, the engine speed of the CVT 32 is increased or decreased by adjusting the fuel injection quantity of the injector 63 to resolve the slippage; second, the engine speed of the engine 31 is increased or decreased by adjusting the electronic throttle opening to resolve the slippage; third, the engine speed of the CVT 32 is increased or decreased by simultaneously adjusting both the fuel injection quantity of the injector 63 and the throttle opening of the electronic throttle body 62 to resolve the slippage.

[0085] In some embodiments, obtaining the rotational speeds of the driving wheel 321 and the driven wheel 322 at a first moment includes:

[0086] The rotational speed of the crankshaft 311 of the engine 31 at a first moment and the speed of the all-terrain vehicle 100 at a first moment are obtained. The rotational speed of the drive wheel 321 at a first moment is determined based on the rotational speed of the crankshaft 311 at a first moment, and the rotational speed of the driven wheel 322 at a first moment is determined based on the speed of the all-terrain vehicle 100 at a first moment. Specifically, since the drive wheel 321 is connected to the crankshaft 311 of the engine 31 and rotates with the crankshaft 311, the rotational speed of the crankshaft 311 at a first moment is the rotational speed of the drive wheel 321 at a first moment.

[0087] It should be noted that determining the rotational speed of the driven wheel 322 at the first moment based on the speed of the all-terrain vehicle 100 at the first moment includes: obtaining the gear position of the gear device 33 at the first moment and determining the gear ratio of the gear device 33 at the first moment based on the gear position; determining the rotational speed of the input shaft 331 of the gear device 33 at the first moment based on the speed of the all-terrain vehicle 100 at the first moment and the gear ratio of the gear device 33 at the first moment; and determining the rotational speed of the driven wheel 322 at the first moment based on the rotational speed of the input shaft 331 of the gear device 33 at the first moment.

[0088] Specifically, the current gear ratio of gear 33 corresponds to the current gear position of gear 33. Therefore, determining the gear position of gear 33 in all-terrain vehicle 100 determines the gear ratio of gear 33 in that gear position. Thus, by obtaining the gear position of gear 33 at the first moment, the gear ratio of gear 33 at that first moment can be determined. It should be further explained that, knowing the gear ratio of gear 33 at the first moment and the vehicle speed of all-terrain vehicle 100 at the first moment, the rotational speed of input shaft 331 of gear 33 at the first moment can be determined. Because the driven wheel 322 in continuously variable transmission 32 is connected to the input shaft 331 of gear 33, knowing the rotational speed of input shaft 331 of gear 33 at the first moment allows the determination of the rotational speed of driven wheel 322 in continuously variable transmission 32.

[0089] Figure 5 This is a flowchart of obtaining the rotational speeds of the driving wheel and driven wheel at the first moment in this embodiment, as shown below. Figure 5 As shown, obtaining the rotational speeds of the driving wheel 321 and the driven wheel 322 at the first moment includes the following steps:

[0090] Step S3011: Obtain the rotational speed of the crankshaft 311 of the engine 31 at the first moment and the vehicle speed at the first moment.

[0091] Step S3012: Determine the rotational speed of the drive wheel 321 at the first time based on the rotational speed of the crankshaft 311 at the first time.

[0092] Step S3013: Obtain the gear position of the gear device 33 at the first time, and determine the speed ratio of the gear device 33 at the first time based on the gear position.

[0093] Step S3014: Determine the rotational speed of the input shaft 331 of the gear device 33 at the first time based on 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.

[0094] Step S3015: Determine the rotational speed of the driven wheel 322 at the first time based on the rotational speed of the input shaft 331 of the gear device 33 at the first time.

[0095] In some of these embodiments, Figure 6 This is a flowchart of a method for controlling the engine in a vehicle according to this embodiment, such as... Figure 6 As shown, if the vehicle operating information includes: the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63, then the method for controlling the engine 31 in the vehicle includes the following steps:

[0096] Step S601: Obtain the vehicle speed of the all-terrain vehicle 100 at the first moment, the gear position of the gear device 3333 at the first moment, the crankshaft 311 speed of the engine 31 at the first moment, the throttle opening of the throttle valve body 62 at the first moment, the fuel injection quantity of the injector 63 at the first moment, and the ambient temperature information of the continuously variable transmission 32 at the first moment.

[0097] In step S602, the gear ratio of the gear device 33 at the first time is determined according to the gear position, and the rotational speed of the driven wheel 322 at the first time is determined according to the vehicle speed of the all-terrain vehicle 100 at the first time and the gear ratio of the gear device 33 at the first time. The rotational speed of the drive wheel 321 at the first time is determined according to the rotational speed of the crankshaft 311 of the engine 31 at the first time.

[0098] Step S603: Obtain preset ambient temperature information that matches the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63 at the first moment.

[0099] Step S604: Compare the ambient temperature information of the continuously variable transmission 32 at the first moment with the preset ambient temperature information to determine whether the continuously variable transmission 32 slips at the first moment.

[0100] In step S605, if the continuously variable transmission 32 slips at the first moment, the instrument panel 61 will issue a warning indication, and the vehicle's throttle body 62 and / or the vehicle's fuel injectors 63 will be adjusted according to the speed of the driving wheel 321, the speed of the driven wheel 322, the throttle opening of the throttle body 62, and the fuel injection quantity of the fuel injector 63 at the first moment, until the continuously variable transmission 32 stops slipping, and then the process ends.

[0101] In addition, obtaining the speed of the all-terrain vehicle 100 at the first moment includes: determining the speed of the all-terrain vehicle 100 at the first moment by means of a speed detection device 65; for example, the speed detection device 65 is a speed sensor.

[0102] Obtaining the rotational speed of the crankshaft 311 of the engine 31 at a first moment includes: determining the rotational speed of the crankshaft 311 of the engine 31 at the first moment by means of an engine speed detection device 66; for example, the engine speed detection device 66 is an engine speed sensor. The engine speed sensor may be located at the crankshaft 311 of the engine 31.

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

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

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

[0106] It should be noted that the steps shown in the above process or in the flowchart of the accompanying figures 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 may be executed in a different order than that shown here.

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

[0108] The continuously variable transmission 32 includes:

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

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

[0111] A drive belt 323 connects the drive pulley 321 and the driven pulley 322 and is used to transmit torque between the drive pulley 321 and the driven pulley 322; characterized in that the all-terrain vehicle 100 also includes a control unit 7, which can be configured to run a computer program to perform the steps in any of the above method embodiments.

[0112] Specifically, the control unit 7 acquires the vehicle operation information of the all-terrain vehicle 100 at a first-time moment, and also acquires the ambient temperature information of the continuously variable transmission (CVT) 32 at a first-time moment. The control unit 7 also acquires pre-set ambient temperature information that matches the first-time vehicle operation information. Furthermore, the control unit 7 compares the first-time ambient temperature information of the CVT 32 with the pre-set ambient temperature information to determine whether the CVT 32 is slipping at a first-time moment; if the CVT 32 is slipping at a first-time moment, the control unit 7 adjusts the torque output of the engine 31 according to the first-time vehicle operation information.

[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 immediately, the control unit 7 can control the instrument panel 61 to display an alarm indication.

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

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

[0117] The control unit 7 adjusts the torque output of the engine 31 based on the vehicle operation information at the first moment, including: the control unit 7 adjusts the throttle opening of the vehicle's throttle valve body 62 and / or the fuel injection quantity of the vehicle's fuel injector 63 based on the vehicle operation information at the first moment.

[0118] In some embodiments, if the vehicle operating information includes: the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle valve body 62, and the fuel injection quantity of the injector 63, the all-terrain vehicle 100 further includes:

[0119] The engine speed detection device 66 is capable of detecting the speed of the crankshaft 311 of the engine 31 at a first moment. 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 moment to the control unit 7. The control unit 7 can determine the speed of the drive wheel 321 at the first moment based on the speed of the crankshaft 311 of the engine 31 at the first moment.

[0120] The vehicle speed detection device 65 is capable of detecting the speed of the all-terrain vehicle 100 at the first moment. The vehicle speed detection device 65 is connected to the control unit 7 and can transmit the speed of the all-terrain vehicle 100 at the first moment to the control unit 7.

[0121] The gear position detection device 67 is capable of detecting the gear position of the gear device 33 at a first moment. The gear position detection device 67 is connected to the control unit 7 and can transmit the gear position of the gear device 33 at the first moment to the control unit 7. The control unit 7 can determine the speed ratio of the gear device 33 at the first moment based on the gear position of the gear device 33 at the first moment. The control unit 7 can determine the rotational speed of the input shaft 331 of the gear device 33 at the first moment based on the vehicle speed of the all-terrain vehicle 100 at the first moment and the speed ratio of the gear device 33 at the first moment, and determine the rotational speed of the driven wheel 322 at the first moment based on the rotational speed of the input shaft 331 of the gear device 33 at the first moment.

[0122] Throttle detection device 64 is capable of detecting the throttle opening degree of throttle valve body 62 at the first moment. Throttle detection device 64 is connected to control unit 7 and can transmit the throttle opening degree of throttle valve body 62 at the first moment to control unit 7.

[0123] The fuel injection quantity detection device 68 can detect the fuel injection quantity of the injector 63 at the first moment. The fuel injection quantity detection device 68 is connected to the control unit 7 and can transmit the fuel injection quantity of the injector 63 at the first moment to the control unit 7.

[0124] In some embodiments, the control unit 7 adjusts the torque output of the engine 31 based on the vehicle operating information at a first moment, including adjusting the throttle body 62 and / or the fuel injector 63 of the all-terrain vehicle 100 based on the vehicle operating information at a first moment. For example, the control unit 7 can adjust the throttle body 62 and / or the fuel injector 63 of the vehicle based on the rotational speed of the drive wheel 321, the rotational speed of the driven wheel 322, the throttle opening of the throttle body 62, and the fuel injection quantity of the fuel injector 63 at a first moment.

[0125] It should be noted that, Figure 7 This is a structural block diagram of the all-terrain vehicle with an electronic throttle valve body in this embodiment, as shown below. Figure 7 As shown, if the engine 31 of the all-terrain vehicle 100 uses an electronic throttle body 62, this electronic throttle body 62 is connected to the control unit 7. When the continuously variable transmission (CVT) 32 slips, in the following situations: First, the control unit 7 adjusts the fuel injection quantity of the injector 63 to increase or decrease the engine speed of the CVT 32 to resolve the slippage; second, the control unit 7 adjusts the electronic throttle opening to increase or decrease the engine speed of the CVT 32 to resolve the slippage; third, the control unit 7 simultaneously adjusts the fuel injection quantity of the injector 63 and the electronic throttle opening to increase or decrease the engine speed of the CVT 32 to resolve the slippage.

[0126] It should be noted that, Figure 8This is a structural block diagram of the all-terrain vehicle with a mechanical throttle valve body in this embodiment, as shown below. Figure 8 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 amount of fuel injected by the fuel injector 63 when the continuously variable transmission 32 slips.

[0127] In some of these embodiments, Figure 9 This is a schematic diagram of the internal structure of the control unit according to an embodiment of this application, such as... Figure 9 As shown, the control unit 7 includes a processor 71, a memory 73, and a network interface 74, which can be connected via an internal bus 72. The processor 71 can be one or more, and may include, but is not limited to, a microprocessor (MCU) or a programmable logic device (FPGA). The memory 73 can be used to store computer programs, such as the computer program corresponding to the method for controlling the engine 31 in the vehicle in this embodiment. The processor 71 executes various functional applications and data processing by running the computer program stored in the memory 73, thereby implementing the aforementioned method. The memory 73 may include high-speed random access memory (RAM) and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 73 may further include remotely located memories 73 relative to the processor 71, which can be connected to a terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks (LANs), mobile communication networks, and combinations thereof. The network interface 74 is used for communication with external terminals via network connection. Those skilled in the art will understand that… Figure 9 The structure of control unit 7 shown is for illustrative purposes only and does not limit the structure of control unit 7 described above. For example, control unit 7 may also include components that are more... Figure 9 The more or fewer components shown, or having the same Figure 9 The different configurations shown are illustrated.

[0128] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0129] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0130] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0131] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended 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 torque output by the engine to the gear device, the gear device driving the vehicle to run; the continuously variable transmission comprising: a driving pulley connected to a crankshaft of the engine; a driven pulley connected to an input shaft of the gear device; a transmission belt connecting the driving pulley and the driven pulley and being used to transmit torque between the driving pulley and the driven pulley; characterized in that the method comprises: obtaining vehicle running information of the vehicle at a first time and obtaining environmental temperature information of the continuously variable transmission at the first time; the environmental temperature information of the continuously variable transmission refers to a temperature value inside a housing of the continuously variable transmission; obtaining pre-set environmental temperature information matched with the vehicle running information at the first time according to the vehicle running information at the first time; comparing the environmental temperature information of the continuously variable transmission at the first time with the pre-set environmental temperature information to determine whether the continuously variable transmission slips at the first time; if the continuously variable transmission slips at the first time, adjusting torque output by the engine according to the vehicle running information at the first time. 2.The method according to claim 1, characterized in that: the environmental temperature information of the continuously variable transmission at the first time is obtained by a temperature detection device arranged inside the continuously variable transmission. 3.The method according to claim 1, characterized in that: if the vehicle running information comprises a rotational speed of the driving pulley and a rotational speed of the driven pulley, obtaining the rotational speed of the driving pulley at the first time comprises: obtaining a rotational speed of the crankshaft of the engine at the first time and determining the rotational speed of the driving pulley at the first time according to the rotational speed of the crankshaft at the first time; obtaining the rotational speed of the driven pulley at the first time comprises: obtaining a vehicle speed of the vehicle at the first time and determining the rotational speed of the driven pulley at the first time according to the vehicle speed of the vehicle at the first time; wherein determining the rotational speed of the driven pulley at the first time according to the vehicle speed of the vehicle at the first time comprises: obtaining 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, determining a rotational speed of the input shaft of the gear device at the first time according to the vehicle speed of the vehicle at the first time and the speed ratio of the gear device at the first time, and determining the rotational speed of the driven pulley at the first time according to the rotational speed of the input shaft of the gear device at the first time. 4.The method according to claim 3, characterized in that: the vehicle speed of the vehicle at the first time is determined by a vehicle speed detection device. The acquiring the rotation speed of the crankshaft of the engine at the first time comprises: determining the rotation speed of the crankshaft of the engine at the first time by an engine rotation speed detecting device; The acquiring the gear position of the gear device at the first time comprises: determining the gear position of the gear device at the first time by a gear device gear position detecting device.

5. The method of claim 1, wherein, The method further comprises: If the continuously variable transmission slips at the first time, the control unit can control the instrument panel to display an alarm indication; The adjusting the torque output by the engine according to the vehicle running information at the first time comprises: adjusting the throttle opening of the throttle valve of the vehicle and / or the fuel injection amount of the fuel injector of the vehicle according to the vehicle running information at the first time.

6. The method according to claim 5, wherein, If the vehicle adopts an electronic throttle valve, the adjusting the throttle opening of the throttle valve of the vehicle and / or the fuel injection amount of the fuel injector of the vehicle according to the vehicle running information at the first time; If the vehicle adopts a mechanical throttle valve, the adjusting the fuel injection amount of the fuel injector of the vehicle according to the vehicle running information at the first time.

7. An all-terrain vehicle, comprising an engine, a continuously variable transmission and a gear device, one end of the continuously variable transmission being connected with the engine, the other end of the continuously variable transmission being connected with the gear device, the continuously variable transmission being used for transmitting power output by the engine to the gear device, the gear device driving the all-terrain vehicle to run; The continuously variable transmission comprises: a driving pulley connected with a crankshaft of the engine; a driven pulley connected with an input shaft of the gear device; a transmission belt connecting the driving pulley and the driven pulley and being used for transmitting torque between the driving pulley and the driven pulley; characterized in that the all-terrain vehicle further comprises a control unit; The control unit acquires vehicle running information of the all-terrain vehicle at a first time and acquires environmental temperature information of the continuously variable transmission at the first time; the environmental temperature information of the continuously variable transmission refers to a temperature value inside a housing of the continuously variable transmission; The control unit further acquires pre-set environmental temperature information matched with the vehicle running information at the first time according to the vehicle running information at the first time; The control unit further compares the environmental temperature information of the continuously variable transmission at the first time with the pre-set environmental temperature information, and determines whether the continuously variable transmission slips at the first time; If the continuously variable transmission slips at the first time, the control unit adjusts torque output by the engine according to the vehicle running information at the first time.

8. The ATV of claim 7, wherein, The all-terrain vehicle further comprises: an instrument panel connected with the control unit; a throttle valve used for controlling air suction into the engine; a fuel injector used for controlling fuel injection into the engine, the fuel injector being connected with the control unit; If the continuously variable transmission slips at the first time, the control unit can control the instrument panel to display an alarm indication; The control unit adjusts the throttle opening of the throttle valve of the all-terrain vehicle and / or the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operating information at the first time.

9. The all-terrain vehicle according to claim 8, wherein The control unit adjusts the throttle opening of the throttle valve of the all-terrain vehicle and / or the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operating information at the first time if the all-terrain vehicle is provided with an electronic throttle valve. The control unit adjusts the fuel injection amount of the fuel injector of the all-terrain vehicle according to the vehicle operating information at the first time if the all-terrain vehicle is provided with a mechanical throttle valve.

10. The all-terrain vehicle of claim 8, characterized in that, The all-terrain vehicle further comprises: engine speed detection means capable of detecting the speed of the crankshaft of the engine at the first time, the engine speed detection means 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; vehicle speed detection means capable of detecting the speed of the all-terrain vehicle at the first time, the vehicle speed detection means being connected to the control unit and capable of transmitting the speed of the all-terrain vehicle at the first time to the control unit; gear position detection means capable of detecting the gear position of the gear device at the first time, the gear position detection means 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, and determining the speed of the input shaft of the gear device at the first time according to the 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 speed of the driven wheel at the first time according to the speed of the input shaft of the gear device at the first time; temperature detection means provided inside the continuously variable transmission and capable of detecting the ambient temperature information of the continuously variable transmission at the first time, the temperature detection means being connected to the control unit and capable of transmitting the ambient temperature information of the continuously variable transmission at the first time to the control unit.

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