Climbing control method for vehicle without gearbox, vehicle power system and vehicle

Abstract

This application discloses a method for controlling the climbing of a vehicle without a transmission, a vehicle power system, and a vehicle. The method is used to control the climbing of a vehicle including an engine and a drive motor and without a transmission, and includes: determining whether the vehicle has entered or is about to enter a climbing section; judging and determining, based on road conditions, whether the vehicle enters an automatic climbing mode, a first climbing mode, or a second climbing mode; issuing a switching instruction to the vehicle's climbing control module to enter the first climbing mode or the second climbing mode, thereby controlling the vehicle to enter the first climbing mode or the second climbing mode; determining the remaining power of the power battery based on the vehicle entering the first climbing mode; and determining the engine load mode of the vehicle in the first climbing mode based on the remaining power of the power battery. This application divides the vehicle's climbing modes and selects a climbing mode based on actual needs, thereby reducing energy consumption and resolving problems such as insufficient climbing power.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a method for controlling hill climbing of a vehicle without a gearbox, a vehicle power system, and a vehicle. Background Art

[0002] This section merely provides background information related to the present application and is not necessarily prior art.

[0003] With the development of motor technology and new energy technologies, vehicle drive modes are becoming increasingly diverse. Since electric motors can achieve speed and torque regulation through electronic control, giving them the functionality of traditional transmissions, the transmission's functionality has been increasingly diminished, making transmissionless vehicles a reality. At the same time, without the transmission's speed and torque control capabilities, relying solely on the drive motor for speed and torque regulation poses significant challenges for vehicles without transmissions to climb hills smoothly. For example, due to the lack of gear changes, transmissionless vehicles have poor adaptability in hill climbing conditions and are prone to power shortages. Summary of the Invention

[0004] This application proposes a method for controlling hill climbing of a vehicle without a gearbox, a vehicle power system, and a vehicle, aiming to optimize the hill climbing control of a vehicle comprising an engine and a drive motor, thereby improving the vehicle's hill climbing performance and reducing energy consumption. This objective is achieved through the following technical solutions:

[0005] In a first aspect, the present application discloses a method for controlling the hill climbing of a vehicle without a gearbox, which is used to control the hill climbing of a vehicle including an engine and a drive motor and without a gearbox, comprising the following steps:

[0006] Determine that the vehicle has entered or is about to enter a climbing section;

[0007] According to the road conditions of the climbing section that the vehicle enters or is about to enter, judging and determining that the vehicle enters the automatic control climbing mode, or judging and determining that the vehicle needs to switch to one of the first climbing mode and the second climbing mode;

[0008] According to the need of the vehicle to switch to the first climbing mode or the second climbing mode, a switching instruction to enter the first climbing mode or the second climbing mode is issued to the climbing control module of the vehicle to control the vehicle to enter the first climbing mode or the second climbing mode;

[0009] According to the vehicle entering the first climbing mode, the remaining power of the power battery is determined;

[0010] Determining the engine load mode of the vehicle in the first climbing mode according to the remaining power of the power battery;

[0011] The maximum speed of the engine in the second climbing mode is greater than the maximum speed of the engine in the first climbing mode; and / or the maximum output torque of the engine in the second climbing mode is greater than the maximum output torque of the engine in the first climbing mode;

[0012] In the automatic control climbing mode, the vehicle is driven by the drive motor, and the engine is used to drive the generator to generate electricity.

[0013] The present application provides a vehicle with an automatic control climbing mode and a first climbing mode and a second climbing mode that can be switched and controlled. The vehicle's climbing is selected and controlled based on the driver's judgment of the slope and road conditions. This allows the vehicle to select a more appropriate climbing mode based on the specific road conditions of the slope being climbed, thereby reducing energy consumption and ensuring sufficient vehicle power. For example, if the driver determines that the first climbing mode is superior to the second climbing mode and the automatic control climbing mode based on the current slope and road conditions, the driver can switch the climbing mode to the first climbing mode. If the driver determines that the second climbing mode is superior to the first climbing mode and the automatic control climbing mode based on the current slope and road conditions, the driver can switch the climbing mode to the second climbing mode. If the driver determines that the automatic climbing mode is superior to the first climbing mode and the second climbing mode based on the current slope and road conditions, the vehicle enters the automatic control climbing mode.

[0014] Furthermore, by making the maximum engine speed in the second climbing mode greater than the engine speed in the first mode, the present application allows the vehicle to switch to the second climbing mode based on actual climbing needs, enabling the vehicle to quickly complete the climb. Additionally, by making the maximum engine output torque in the second climbing mode greater than the maximum engine output torque in the first climbing mode, the present application allows the vehicle to select a climbing mode based on the steepness of the slope being climbed, thus avoiding the problem of insufficient power during the vehicle climbing process. In short, by classifying the vehicle's climbing modes, the present application allows the vehicle to select a climbing mode based on actual needs, preventing the engine from matching and responding to the maximum load during the climbing process, thereby reducing energy consumption and resolving problems such as insufficient power for climbing.

[0015] As some preferred embodiments of the present application, the step of further selectively determining the remaining power of the power battery according to the vehicle entering the first climbing mode includes:

[0016] Based on the remaining power of the power battery being less than or equal to a charge threshold set by the hill climbing control module, controlling the vehicle's drive motor to drive the vehicle, and controlling the engine to operate in a first load mode for simultaneously driving the vehicle's running mechanism and the vehicle's generator to generate electricity;

[0017] And / or, based on the remaining power of the power battery being greater than the charge threshold set by the climbing control module, the vehicle's drive motor is controlled to drive the vehicle, and the engine is controlled to operate in a second load mode of only driving the vehicle's traveling mechanism when intervening.

[0018] This application ensures the vehicle's power needs in the first climbing mode by further determining the remaining charge of the power battery and, subsequently, the engine's load mode. Specifically, when the power battery's charge is less than or equal to a set value, the engine converts some mechanical energy into electrical energy, ensuring the vehicle's power needs while also driving the vehicle. The combined power of the power battery and engine drives the vehicle. When the power battery's remaining charge exceeds the set value, the engine provides targeted output to the travel mechanism, enabling the vehicle to rapidly climb in the first climbing mode through the combined drive of the drive motor and engine.

[0019] As some preferred embodiments of the present application, the charge threshold is further selectively set to any value between 35% and 45% of the rated charge capacity of the power battery.

[0020] As some preferred embodiments of the present application, the step of further selectively issuing a switching instruction to the vehicle's climbing control module to enter a first climbing mode or a second climbing mode includes: determining, based on at least one of the vehicle's load, the length of the slope being climbed by the vehicle, and the slope of the slope, and issuing, via a triggering unit, an instruction to the climbing control module to enter the first climbing mode or the second climbing mode, so that the vehicle operates in the first climbing mode or the second climbing mode. The present application determines whether to enter the first climbing mode or the second climbing mode based on at least one of the vehicle's load, the length of the slope being climbed by the vehicle, and the slope of the slope.

[0021] As some preferred embodiments of the present application, further selectively when the vehicle is in the second climbing mode, the vehicle's starting generator is controlled to output power to the vehicle's running mechanism based on at least one of the vehicle's load and the slope.

[0022] This application can effectively improve the driving torque of the vehicle in the second climbing mode by controlling the vehicle's starting and generating integrated machine to output power to the vehicle's walking mechanism, ensuring that the vehicle has better driving force in the second climbing mode.

[0023] In a second aspect, the present application further discloses a vehicle power system for implementing the hill climbing control method for a gearbox-less vehicle as described in any of the aforementioned embodiments, the vehicle power system comprising an engine, a drive motor, a power battery, an integrated starter generator, a clutch, a traveling mechanism, and a vehicle control system; the power battery is electrically connected to the drive motor, the power battery is electrically connected to the integrated starter generator, the drive motor is arranged in a transmission arrangement with the traveling mechanism, and the engine is arranged in a transmission arrangement with the traveling mechanism via the clutch;

[0024] The vehicle control system includes a main control unit and a climbing control module. The climbing control module is connected to the main control unit by signal. The main control unit is used to control the vehicle to enter or exit the automatic control climbing mode.

[0025] The drive motor, the starter generator and the clutch are all connected to the climbing control module signal and are controlled by the climbing control module.

[0026] The present application provides a vehicle control system comprising a main control unit and a hill climbing control module, further enabling the main control unit to control the vehicle's entry into or exit from an automatic hill climbing mode. This allows the vehicle to select an automatic hill climbing mode, a first hill climbing mode, or a second hill climbing mode based on the road conditions (e.g., slope, length, flatness, congestion, etc.) and the vehicle's load. This avoids the high energy consumption and poor fuel economy that can arise from the engine and drive motor always configuring power according to peak load response requirements during hill climbing. In specific implementations, the engine's output speed and torque can be matched to the actual hill climbing conditions to achieve rapid hill climbing, thereby avoiding the problem of insufficient vehicle power. In specific implementations, the maximum output torque of the engine in the first hill climbing mode can be selectively set to be greater than the maximum output torque of the engine in the automatic hill climbing mode, and / or the maximum output speed of the engine in the first hill climbing mode can be set to be greater than the maximum output speed of the engine in the automatic hill climbing mode.

[0027] As some preferred embodiments of the present application, the climbing control module further selectively includes a trigger unit, the trigger unit is signal-connected to the climbing control module, and the climbing control module stores a time threshold;

[0028] The vehicle power system is further configured such that when the trigger unit is held for a duration less than or equal to a time threshold, the vehicle enters one of a first climbing mode and a second climbing mode; and when the trigger unit is held for a duration greater than the time threshold, the vehicle enters the other of the first climbing mode and the second climbing mode. Alternatively, the vehicle power system may be selectively configured such that when the trigger unit is triggered a number of n times, the vehicle enters the first climbing mode; and when the trigger unit is triggered a number of m times, the vehicle enters the second climbing mode, where n and m are both positive integers, and n is less than m.

[0029] By making the hill climbing control module include a trigger unit, the present application enables the vehicle power system to control the vehicle to enter one of the first climbing mode and the second climbing mode according to the actual slope conditions; so that during the climbing process, the vehicle can better combine the driver's prediction to select the climbing mode.

[0030] As some preferred embodiments of the present application, the vehicle is further selectively configured to have an engine speed range of 1300 r / min-2000 r / min in the first climbing mode; the vehicle power system is configured such that the maximum speed of the engine in the second climbing mode is greater than the maximum speed of the engine in the first climbing mode; and / or the maximum output torque of the engine in the second climbing mode is greater than the maximum output torque of the engine in the first climbing mode.

[0031] This application limits the engine speed range in the first climbing mode to 1300r / min-2000r / min, so that in the first climbing mode, the engine operates under low fuel consumption and high torque output conditions, which is suitable for climbing conditions. When configuring the vehicle power system, the maximum speed of the engine in the second climbing mode is greater than the maximum speed of the engine in the first mode, so that during the climbing process, a fast climbing process (in the second climbing mode) can be selected according to actual conditions. It is also possible to selectively configure the vehicle power system so that the maximum output torque of the engine in the second climbing mode is greater than the maximum output torque of the engine in the first mode, so that during the climbing process, a high torque output of the engine can be selected according to actual conditions, thereby avoiding the problem of insufficient power when the vehicle is climbing.

[0032] As some preferred embodiments of the present application, the vehicle power system further selectively includes a tilt sensor, a weight sensor, and an information prompt module; the tilt sensor is used to collect the tilt information of the slope climbed by the vehicle, and the tilt sensor is connected to the climbing control module signal; the weight sensor is used to collect the load weight of the vehicle, and the weight sensor is connected to the climbing control module signal; the information prompt module is connected to the climbing control module signal, and the information prompt module is used to issue a prompt message for entering the first climbing mode or entering the second climbing mode; the climbing control module stores a vehicle load threshold and a vehicle tilt threshold, and the climbing control module can receive the tilt value collected by the tilt sensor and compare it with the vehicle tilt threshold; the climbing control module is used to receive the load weight collected by the weight sensor and compare it with the vehicle load threshold; the information prompt unit is configured to: when the tilt value collected by the tilt sensor is greater than the vehicle tilt threshold, and / or when the load weight collected by the weight sensor is greater than the vehicle load threshold, the information prompt unit issues a prompt message.

[0033] The present application provides prompt information for smooth climbing by making the vehicle power system include an inclination sensor, a weight sensor, and an information prompt module, and then during the climbing process, prompt information is sent to the driver to enter the first climbing mode or the second climbing mode according to the slope information and load information climbed by the vehicle.

[0034] In a third aspect, the present application also discloses a vehicle having the vehicle power system described in the aforementioned embodiment.

[0035] The above description is only an overview of the technical solution of the implementation method of this application. In order to more clearly understand the technical means of the implementation method of this application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the implementation method of this application more obvious and easy to understand, the specific implementation method of this application is specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0038] Figure 1This is a control flow chart for a transmissionless vehicle entering a hill climbing mode provided by an embodiment of the present application;

[0039] Figure 2 This is a control flow chart for a transmissionless vehicle entering a first climbing mode provided by an embodiment of the present application;

[0040] Figure 3 A schematic diagram of a vehicle power system provided in an embodiment of the present application.

[0041] In the picture:

[0042] 1. Engine;

[0043] 2. Drive motor;

[0044] 3. Power battery;

[0045] 4. Start the integrated generator;

[0046] 5. Clutch;

[0047] 6. Traveling mechanism;

[0048] 7. Hill climbing control module.

[0049] Figure 1 In the figure: Switch_st=0 represents that the trigger unit has not received the trigger information; Switch_st=1 represents that the trigger unit has received the trigger information; t represents the duration of the trigger unit triggering. DETAILED DESCRIPTION

[0050] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0052] Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0055] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0056] The term "plurality" used in this application refers to two or more (including two).

[0057] In the first aspect, the present application proposes a method for controlling the hill climbing of a vehicle without a gearbox, such as Figure 1 and Figure 2 As shown, the method is used to control the climbing of a vehicle including an engine and a drive motor but without a gearbox, including the following steps:

[0058] Determine that the vehicle has entered or is about to enter a climbing section;

[0059] According to the road conditions of the climbing section that the vehicle enters or is about to enter, judging and determining that the vehicle enters the automatic control climbing mode, or judging and determining that the vehicle needs to switch to one of the first climbing mode and the second climbing mode;

[0060] According to the need of the vehicle to switch to the first climbing mode or the second climbing mode, a switching instruction to enter the first climbing mode or the second climbing mode is issued to the climbing control module of the vehicle to control the vehicle to enter the first climbing mode or the second climbing mode;

[0061] According to the vehicle entering the first climbing mode, the remaining power of the power battery is determined;

[0062] The engine load mode of the vehicle in the first climbing mode is determined according to the remaining power of the power battery.

[0063] In a specific implementation, the maximum engine speed in the second hill-climbing mode can be further selectively set to be greater than the maximum engine speed in the first hill-climbing mode; the maximum engine output torque in the second hill-climbing mode can be greater than the maximum engine output torque in the first hill-climbing mode. As an alternative embodiment, the maximum engine speed in the second hill-climbing mode can be further selectively set to be greater than the maximum engine speed in the first hill-climbing mode; or the maximum engine output torque in the second hill-climbing mode can be further selectively set to be greater than the maximum engine output torque in the first hill-climbing mode.

[0064] It should be noted that the "automatic climbing mode" in this application refers to the automatic control mode built into the vehicle's powertrain that enables the vehicle to climb a slope. In practice, the vehicle can be configured in automatic climbing mode to be driven solely by the drive motor, with the drive motor's speed and / or output torque automatically adjusted. This climbing mode is particularly useful when climbing a gentle, short slope, or when the vehicle is carrying a small load. In practice, when the vehicle is in automatic climbing mode, the vehicle can be configured to be driven solely by the drive motor, with the engine solely used to drive the generator. It should be noted that the term "generator" in this application refers to any device capable of converting engine power into electricity. In practice, the generator can be configured as a combined starter and generator, capable of converting electrical energy into mechanical energy, or vice versa. When the vehicle is in automatic climbing mode, the engine drives the generator to generate electricity based on the power battery charge. Specifically, when the power battery charge is less than a set value, the engine drives the power battery to generate electricity.

[0065] The present application provides a vehicle with an automatic control climbing mode and a first climbing mode and a second climbing mode that can be switched to control the vehicle's climbing. The vehicle's climbing is selected and controlled based on the driver's judgment of the slope and road conditions. This allows the driver to select a more appropriate climbing mode based on the specific road conditions of the slope being climbed, thereby reducing energy consumption and ensuring sufficient vehicle power. For example, if the driver determines that the first climbing mode is superior to the second climbing mode and the automatic control climbing mode based on the current slope and road conditions, the driver can switch the climbing mode to the first climbing mode. If the driver determines that the second climbing mode is superior to the first climbing mode and the automatic control climbing mode based on the current slope and road conditions, the driver can switch the climbing mode to the second climbing mode. If the automatic climbing mode is superior to the first climbing mode and the second climbing mode based on the current slope and road conditions, the vehicle enters the automatic control climbing mode. It should be noted that, while meeting the climbing power requirements, the energy consumption in the automatic control climbing mode is lower than that in the first climbing mode, and the energy consumption in the first climbing mode is lower than that in the second climbing mode. Therefore, when the energy consumption in the automatic control climbing mode meets the power requirements when climbing, the automatic control climbing mode is selected first; when the automatic control climbing mode does not meet the power requirements, and the power in the first climbing mode meets the climbing requirements, the first climbing mode is selected first; when both the automatic control climbing mode and the first climbing mode do not meet the power requirements, the second climbing mode is selected.

[0066] Furthermore, by making the maximum engine speed in the second climbing mode greater than the engine speed in the first mode, the present application allows the vehicle to switch to the second climbing mode based on actual climbing needs, enabling the vehicle to quickly complete the climb. Additionally, by making the maximum engine output torque in the second climbing mode greater than the maximum engine output torque in the first climbing mode, the present application allows the vehicle to select a climbing mode based on the steepness of the slope being climbed, thus avoiding the problem of insufficient power during the vehicle climbing process. In short, by classifying the vehicle's climbing modes, the present application allows the vehicle to select a climbing mode based on actual needs, preventing the engine from matching and responding to the maximum load during the climbing process, thereby reducing energy consumption and resolving problems such as insufficient power for climbing.

[0067] As some preferred embodiments of the present application, the vehicle's drive motor is selectively controlled to drive the vehicle, and the engine is controlled to operate in a first load mode, simultaneously driving the vehicle's running gear and the vehicle's generator, based on the remaining charge of the power battery being less than or equal to a charge threshold set by the hill climbing control module. Specifically, when the power battery's charge is less than or equal to a set value, the engine can convert some mechanical energy into electrical energy to meet the vehicle's power needs while also driving the vehicle, with the combined power of the power battery and engine driving the vehicle. This application further determines the remaining charge of the power battery in the first hill climbing mode, and then determines the engine's load mode, to ensure the vehicle's power needs in the first hill climbing mode.

[0068] In specific implementations, the vehicle can optionally enter the first hill-climbing mode and determine that the remaining charge of the power battery is greater than a charge threshold set by the hill-climbing control module. The vehicle's drive motor can then be controlled to drive the vehicle, while the engine can be controlled to operate in the second load-carrying mode, which only drives the vehicle's running gear. Specifically, when the remaining charge of the power battery is greater than a set value, the engine can provide targeted output to the running gear, enabling the vehicle to climb in the first hill-climbing mode, driven by both the drive motor and the engine.

[0069] In some preferred embodiments of the present application, the charge threshold is further selectively set to any value between 35% and 45% of the rated charge capacity of the power battery. In specific implementations, the charge threshold can be selectively set to 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, or 45% of the rated charge capacity of the power battery; in specific implementations, this value is manually calibrated.

[0070] As some preferred embodiments of the present application, a trigger unit is further selectively configured to determine whether to enter a first climbing mode or a second climbing mode based on at least one of the vehicle's load, the length of the ramp being climbed, and the slope of the ramp, and to issue an instruction to the climbing control module via the trigger unit, thereby causing the vehicle to operate in the first climbing mode or the second climbing mode. In specific implementations, the vehicle's load can be selectively collected using a weight sensor, and the slope of the ramp can be selectively collected using an inclination sensor. The vehicle's load, the length of the ramp being climbed, and the slope of the ramp can also be selectively pre-determined by the driver, and based on this pre-determination, the trigger unit is configured to cause the vehicle to enter the first climbing mode or the second climbing mode.

[0071] As some preferred embodiments of the present application, further selectively, when the vehicle is in the second climbing mode, the vehicle's integrated starter generator is controlled to output power to the vehicle's traveling mechanism according to at least one of the vehicle's load and the slope of the slope. In specific implementation, it can be determined whether to control the vehicle's integrated starter generator to output power to the vehicle's traveling mechanism based on the slope of the slope the vehicle is climbing and the vehicle's load. The integrated starter generator, the engine, and the drive motor can output power to the vehicle's traveling mechanism at the same time, thereby reducing the maximum rated output power of the engine and reducing the engine's power matching requirements. The present application can effectively improve the vehicle's driving torque in the second climbing mode by controlling the vehicle's integrated starter generator to output power to the vehicle's traveling mechanism, thereby ensuring that the vehicle has better driving force in the second climbing mode.

[0072] In a second aspect, the present application also discloses a vehicle power system, such as Figure 3 As shown, for implementing the hill climbing control method for a gearbox-less vehicle as described in any of the aforementioned embodiments, the vehicle power system includes an engine 1, a drive motor 2, a power battery 3, an integrated starter generator 4, a clutch 5, a traveling mechanism 6, and a vehicle control system; the power battery 3 is electrically connected to the drive motor 2, the power battery 3 is electrically connected to the integrated starter generator 4, the drive motor 2 is arranged in a transmission arrangement with the traveling mechanism 6, and the engine 1 is arranged in a transmission arrangement with the traveling mechanism 6 via the clutch 5;

[0073] The vehicle control system includes a main control unit (not shown) and a climbing control module 7. The climbing control module 7 is connected to the main control unit by signal. The main control unit is used to control the vehicle to enter or exit the automatic control climbing mode; the engine 1, drive motor 2, starter generator 4, and clutch 5 are all connected to the climbing control module 7 by signal and are controlled by the climbing control module 7.

[0074] During operation, engine 1 can selectively operate in three modes: first, driving the generator to generate electricity; second, driving the generator to generate electricity while also driving the vehicle's running mechanism 6; and third, driving only the vehicle's running mechanism 6. The power battery 3 can output power to the drive motor 2 and the integrated starter-generator 4, which in turn deliver power to the running mechanism 6 through the drive motor 2 and the integrated starter-generator 4.

[0075] It should be noted that the integrated starter and generator 4 in the present application can be used to start the engine and can be used to generate electricity when driven by the engine.

[0076] The present application makes the vehicle control system include a main control unit and a climbing control module, and further makes the main control unit used to control the vehicle to enter or exit the automatic control climbing mode, so that during the climbing process, the vehicle can select the automatic control climbing mode, adopt one of the first climbing mode and the second climbing mode according to the road conditions of the climbed slope (the slope, length, flatness, congestion level, etc.) and the vehicle load. This avoids the problems of high energy consumption and poor fuel economy caused by the engine always configuring power according to the maximum load response requirements during the climbing process of the vehicle including the engine and the drive motor; in the specific implementation, the output speed and output torque of the engine can also be matched according to the actual climbing road conditions to achieve rapid climbing of the vehicle. At the same time, it can also avoid the problem of insufficient vehicle power.

[0077] As a preferred embodiment of the present application, the maximum output torque of the engine of the vehicle in the first climbing mode is further selectively made greater than the maximum output torque of the engine of the vehicle in the automatic control climbing mode; and / or, the maximum output speed of the engine of the vehicle in the first climbing mode is selectively made greater than the maximum output speed of the engine of the vehicle in the automatic control climbing mode.

[0078] In some preferred embodiments of the present application, the hill climbing control module further optionally includes a trigger unit, which is signal-connected to the hill climbing control module, and the hill climbing control module stores a time threshold. In specific implementations, the trigger unit can optionally be configured as a touch switch or a button. The vehicle power system is further configured such that when the trigger unit is held for a time period equal to or less than a set time threshold, the vehicle enters one of a first hill climbing mode and a second hill climbing mode; and when the trigger unit is held for a time period greater than the set time threshold, the vehicle enters the other of the first and second hill climbing modes. It should be noted that the "time threshold" in this application is not specifically limited and can be set manually, for example, to 1 second. In specific implementations, the vehicle can optionally enter the first hill climbing mode when the trigger unit is triggered for less than 1 second, and the second hill climbing mode when the trigger unit is triggered for greater than 1 second; alternatively, the vehicle can enter the first hill climbing mode when the trigger unit is triggered for greater than 1 second, and the second hill climbing mode when the trigger unit is triggered for less than 1 second. As a variable implementation, the time threshold can be selectively set to any duration such as 0.5 seconds, 1.5 seconds, 2 seconds, 2.5 seconds, 3 seconds or 3.5 seconds.

[0079] As an alternative embodiment, the vehicle power system may be optionally configured such that when the trigger unit is triggered n times, the vehicle enters the first hill-climbing mode, and when the trigger unit is triggered m times, the vehicle enters the second hill-climbing mode, where n and m are both positive integers, and n is less than m. In a specific implementation, n may be optionally set to 1 and m to 2. When the trigger unit is triggered 1 times, the vehicle enters the first hill-climbing mode, and when the trigger unit is triggered 2 times, the vehicle enters the second hill-climbing mode.

[0080] By making the hill climbing control module include a trigger unit, the present application enables the vehicle power system to control the vehicle to enter one of the first climbing mode and the second climbing mode in the form of control according to the actual slope conditions and the driver's prediction of the climbing conditions such as the road conditions of the slope to be climbed; so that during the climbing process, the vehicle can better select the climbing mode in combination with the driver's prediction.

[0081] In some preferred embodiments of the present application, the vehicle's engine speed in the first hill-climbing mode is further selectively configured to be between 1300 rpm and 2000 rpm. In specific implementations, the vehicle's power system is further selectively configured such that the maximum engine speed in the second hill-climbing mode is greater than the maximum engine speed in the first hill-climbing mode, and the maximum output torque of the engine in the second hill-climbing mode is greater than the maximum output torque of the engine in the first hill-climbing mode. As a variant implementation, the maximum engine speed in the second hill-climbing mode may be selectively configured to be greater than the maximum engine speed in the first hill-climbing mode to achieve rapid hill climbing. Alternatively, the maximum output torque of the engine in the second hill-climbing mode may be selectively configured to be greater than the maximum output torque of the engine in the first hill-climbing mode to enable the vehicle to output greater torque in the second hill-climbing mode, ensuring sufficient hill-climbing power. In specific implementations, the engine speed in the first hill-climbing mode may be selected based on the characteristic curve of the selected engine (either an external characteristic curve or a universal characteristic curve).

[0082] This application limits the engine speed range in the first climbing mode to 1300 rpm - 2000 rpm, thereby allowing the engine to operate under low fuel consumption and high torque output conditions in the first climbing mode. When configuring the vehicle power system, the maximum engine speed in the second climbing mode is set to be greater than the maximum engine speed in the first mode, thereby enabling the selection of a fast climbing process (in the second climbing mode) based on actual conditions during the climbing process. Optionally, when configuring the vehicle power system, the maximum output torque of the engine in the second climbing mode is set to be greater than the maximum output torque of the engine in the first mode, thereby enabling the selection of a high torque output of the engine based on actual conditions during the climbing process, thereby avoiding the problem of insufficient power during the vehicle climbing process.

[0083] As some preferred embodiments of the present application, the vehicle power system is further selectively made to include an inclination sensor, a weight sensor, and an information prompt module; the inclination sensor is used to collect the inclination information of the slope climbed by the vehicle, and the inclination sensor is connected to the climbing control module signal; the weight sensor is used to collect the load weight of the vehicle, and the weight sensor is connected to the climbing control module signal; the information prompt module is connected to the climbing control module signal, and the information prompt module is used to issue a prompt message for entering the first climbing mode or entering the second climbing mode; the climbing control module stores a vehicle load threshold and a vehicle inclination threshold, and the climbing control module can receive the inclination value collected by the inclination sensor and compare it with the vehicle inclination threshold; the climbing control module is used to receive the load weight collected by the weight sensor and compare it with the vehicle load threshold.

[0084] In a specific implementation, the information prompt unit can be selectively configured to issue a prompt message when the inclination value collected by the inclination sensor is greater than the vehicle inclination threshold, and when the load value collected by the weight sensor is greater than the vehicle load threshold. As an alternative embodiment, the information prompt unit can also be selectively configured to issue a prompt message when the inclination value collected by the inclination sensor is greater than the vehicle inclination threshold; or when the load value collected by the weight sensor is greater than the vehicle load threshold.

[0085] The present application provides a vehicle power system including an inclination sensor, a weight sensor, and an information prompt module, and then during the climbing process, a prompt message is sent to the driver to enter the first climbing mode or the second climbing mode according to the slope information and load information climbed by the vehicle, providing prompt information for smooth climbing and preventing the driver from forgetting to switch the climbing mode.

[0086] In a third aspect, the present application also discloses a vehicle having the vehicle power system described in the aforementioned embodiment.

[0087] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for controlling the climbing of a vehicle without a gearbox, for controlling the climbing of a vehicle including an engine and a drive motor and without a gearbox, characterized in that: The steps include: Determine that the vehicle has entered or is about to enter a climbing section; According to the road conditions of the climbing section that the vehicle enters or is about to enter, judging and determining that the vehicle enters the automatic control climbing mode, or judging and determining that the vehicle needs to switch to one of the first climbing mode and the second climbing mode; According to the need of the vehicle to switch to the first climbing mode or the second climbing mode, a switching instruction to enter the first climbing mode or the second climbing mode is issued to the climbing control module of the vehicle to control the vehicle to enter the first climbing mode or the second climbing mode; determining the remaining power of the power battery according to the vehicle entering the first climbing mode; determining, according to the remaining power of the power battery, a load mode of the engine of the vehicle in the first climbing mode; The maximum speed of the engine in the second climbing mode is greater than the maximum speed of the engine in the first climbing mode; and / or, the maximum output torque of the engine in the second climbing mode is greater than the maximum output torque of the engine in the first climbing mode; In the automatic control climbing mode, the vehicle is driven by the drive motor and the engine is used to drive the generator to generate electricity; The step of issuing a switching instruction to the vehicle's hill climbing control module to enter the first hill climbing mode or the second hill climbing mode includes: Determining, based on at least one of the vehicle's load, the length of the slope being climbed by the vehicle, and the slope of the slope, and issuing, through a triggering unit, an instruction to a climbing control module to enter the first climbing mode or the second climbing mode, so that the vehicle operates in the first climbing mode or the second climbing mode; According to the vehicle entering the first climbing mode, the step of determining the remaining power of the power battery includes: Based on the remaining power of the power battery being less than or equal to the charge threshold set by the hill climbing control module, controlling the vehicle's drive motor to drive the vehicle, and controlling the engine to operate in a first load mode for simultaneously driving the vehicle's running mechanism and the vehicle's generator to generate electricity; and / or, based on the remaining power of the power battery being greater than a charge threshold set by the hill climbing control module, controlling the vehicle's drive motor to drive the vehicle, and controlling the engine to operate in a second load-carrying mode of only driving the vehicle's traveling mechanism during intervention; The charge threshold is set to any value between 35% and 45% of the rated charge capacity of the power battery; When the vehicle is in the second climbing mode, the vehicle's integrated starter and generator are controlled to output power to the vehicle's traveling mechanism based on at least one of the vehicle's load and the slope.

2. A vehicle power system for implementing the hill climbing control method for a vehicle without a gearbox as claimed in claim 1, characterized in that: The vehicle power system includes an engine, a drive motor, a power battery, a starter generator, a clutch, a running mechanism and a vehicle control system; The power battery is electrically connected to the drive motor, the power battery is electrically connected to the starter generator, the drive motor is transmission-set to the travel mechanism, and the engine is transmission-set to the travel mechanism via the clutch; The vehicle control system includes a main control unit and a climbing control module, wherein the climbing control module is connected to the main control unit by signal, and the main control unit is used to control the vehicle to enter or exit the automatic control climbing mode; The drive motor, the integrated starter generator, and the clutch are all connected to the ramp control module by signal and are controlled by the ramp control module; The hill climbing control module includes a trigger unit, the trigger unit is connected to the hill climbing control module by signal, and the hill climbing control module stores a time threshold; The vehicle power system is configured to: when the holding time of the trigger unit is less than or equal to the time threshold, the vehicle enters one of the first climbing mode and the second climbing mode; when the holding time of the trigger unit is greater than the time threshold, the vehicle is controlled to enter the other of the first climbing mode and the second climbing mode; Alternatively, the vehicle power system is configured such that: when the trigger unit is triggered n times, the vehicle enters a first climbing mode; and when the trigger unit is triggered m times, the vehicle enters a second climbing mode, wherein: n and m are both positive integers, and n is less than m; In the first climbing mode, the engine speed range is 1300 rpm to 2000 rpm. The vehicle power system is configured such that: the maximum speed of the engine in the second climbing mode is greater than the maximum speed of the engine in the first climbing mode; and / or the maximum output torque of the engine in the second climbing mode is greater than the maximum output torque of the engine in the first climbing mode; The vehicle power system further includes: An inclination sensor is used to collect inclination information of the grade climbed by the vehicle, and the inclination sensor is connected to the climbing control module by signal; A weight sensor, used to collect the load weight of the vehicle, wherein the weight sensor is connected to the climbing control module by signal; an information prompt module, the information prompt module being signal-connected to the hill climbing control module, and configured to issue a prompt message indicating that the user has entered the first hill climbing mode or the second hill climbing mode; The hill climbing control module stores a vehicle load threshold and a vehicle tilt angle threshold. The hill climbing control module is capable of receiving the tilt angle value collected by the tilt sensor and comparing it with the vehicle tilt angle threshold. The hill climbing control module is used to receive the load value collected by the weight sensor and compare it with the vehicle load threshold. The information prompt module is configured to issue a prompt message when the inclination value collected by the inclination sensor is greater than the vehicle inclination threshold and / or when the load value collected by the weight sensor is greater than the vehicle load threshold.

3. A vehicle, characterized in that: A vehicle power system according to claim 2.

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