Vehicle control method and device

Abstract

The invention discloses a vehicle control method and device, relates to the technical field of vehicle engineering, and improves the condition of insufficient power of a vehicle under extreme working conditions. When the vehicle is a fuel vehicle, the method comprises the steps that when a preset short-time torque release mode in the vehicle is in an activated state, the torque Q2 currently needed by the whole vehicle and the maximum torque Q3 calibrated on an external characteristic curve of an engine are obtained; whether the torque Q2 is larger than the maximum torque Q3 or not is judged, if yes, the engine is controlled to operate according to the torque Q4, and the continuous operation time of the engine according to the torque Q4 is monitored; when the time reaches the preset time T1, the engine is controlled to restore to the original torque output state; wherein the torque Q1 is the maximum torque allowed to be continuously output by the engine within the time T1, and the value of the torque Q1 is larger than the maximum torque Q3; and the torque Q4 is the minimum value of the torque Q1 and the torque Q2.

Description

Technical Field

[0001] This application relates to the technical field of vehicle engineering, and particularly to a vehicle control method and device. Background Art

[0002] In industrial transportation and engineering operations, vehicles (such as mining trucks, heavy engineering vehicles, etc.) often face extreme working conditions, such as scenarios where mining trucks climb heavy loads on mines, and heavy engineering vehicles are stuck in muddy sections. At this time, even if the power system installed in the vehicle is running at full capacity and reaches the maximum power value allowed by the external characteristic curve (calibration curve) of the power system, it is still difficult to meet the power requirements under extreme working conditions. Summary of the Invention

[0003] In view of the above problems, this application provides a vehicle control method and device to improve the situation of insufficient power of the vehicle under extreme working conditions. The specific solutions are as follows:

[0004] In the first aspect of this application, a vehicle control method is provided. The vehicle is a fuel vehicle, and the method includes:

[0005] When the short-term torque release mode preset in the vehicle is in an active state, obtain the torque Q2 currently required by the whole vehicle and the maximum torque Q3 calibrated on the external characteristic curve of the engine;

[0006] Judge whether the torque Q2 is greater than the maximum torque Q3. If so, control the engine to operate according to the torque Q4, and monitor the time for which the engine continuously operates according to the torque Q4; when the time reaches the preset time T1, control the engine to return to the original torque output state;

[0007] Among them, the torque Q1 is the maximum torque that the engine is allowed to continuously output within the time T1, and its value is greater than the maximum torque Q3; the torque Q4 is the minimum value of the torque Q1 and the torque Q2.

[0008] In a possible implementation, before controlling the engine to operate according to the torque Q4, it further includes: controlling the vehicle to send a prompt message.

[0009] In a possible implementation, after controlling the engine to operate according to the torque Q4, it further includes: when receiving the first command issued by the user, directly control the engine to return to the original torque output state and maintain the short-term torque release mode in an active state.

[0010] In a possible implementation, the method further includes:

[0011] When the economy improvement mode preset in the vehicle is in the activated state, it is judged whether the current engine speed is greater than the rated speed N1. If so, it is judged whether the duration of the state that the current engine speed is greater than the rated speed N1 exceeds the preset time T3;

[0012] If it exceeds the time T3, then calculate the power P8 currently required by the whole vehicle, and calculate the maximum power P9 that the whole vehicle can output when the engine runs at the preset speed N2; the speed N2 is not greater than the speed N1;

[0013] If the power P9 is not less than the power P8, then control the vehicle to send a prompt message, and control the engine to run at the speed N2.

[0014] The second aspect of the present application provides another vehicle control method. The vehicle is an extended-range electric vehicle, and the method includes:

[0015] When the short-time power release mode preset in the vehicle is in the activated state, obtain the power P2 currently required by the whole vehicle and the maximum power P3 calibrated on the external characteristic curve of the motor;

[0016] Judge whether the power P2 is greater than the maximum power P3. If so, control the motor to run according to the power P4, and monitor the duration of the motor running continuously according to the power P4; when the time reaches the preset time T2, control the motor to return to the original power output state;

[0017] Among them, the power P1 is the maximum power that the motor is allowed to continuously output within the time T2, and its value is greater than the maximum power P3; the power P4 is the minimum value of the power P1 and the power P2.

[0018] In a possible implementation, before controlling the motor to run according to the power P4, it further includes: controlling the vehicle to send a prompt message.

[0019] In a possible implementation, after controlling the motor to run according to the power P4, it further includes: when receiving the third command issued by the user, directly control the motor to return to the original power output state, and maintain the short-time power release mode in the activated state.

[0020] The third aspect of the present application provides a vehicle control device. The vehicle is a fuel vehicle, and the device includes:

[0021] The first condition judgment unit is used to obtain the torque Q2 currently required by the whole vehicle and the maximum torque Q3 calibrated on the external characteristic curve of the engine when the short-time torque release mode preset in the vehicle is in the activated state; judge whether the torque Q2 is greater than the maximum torque Q3;

[0022] A short-term torque enhancement unit, configured to control the engine to operate at torque Q4 when the torque Q2 is greater than the maximum torque Q3, and monitor the duration of the engine operating at the torque Q4; when the duration reaches a preset time T1, control the engine to resume its original torque output state;

[0023] Wherein, the torque Q1 is the maximum torque that the engine is allowed to continuously output within the time T1, and its value is greater than the maximum torque Q3; the torque Q4 is the minimum value between the torque Q1 and the torque Q2.

[0024] In a possible implementation, the device further includes:

[0025] A second condition judgment unit, configured to, when an economy improvement mode preset in the vehicle is in an activated state, judge whether the current engine speed is greater than the rated speed N1; if so, judge whether the duration of the current engine speed being greater than the rated speed N1 exceeds a preset time T3; if the duration exceeds the time T3, calculate the power P8 currently required by the whole vehicle, and calculate the maximum power P9 that the whole vehicle can output when the engine operates at a preset speed N2; the speed N2 is not greater than the speed N1;

[0026] An economy improvement unit, configured to, when the power P9 is not less than the power P8, control the vehicle to send a prompt message and control the engine to operate at the speed N2.

[0027] A fourth aspect of the present application provides another vehicle control device, where the vehicle is an extended-range electric vehicle, and the device includes:

[0028] A third condition judgment unit, configured to, when a short-term power release mode preset in the vehicle is in an activated state, obtain the power P2 currently required by the whole vehicle and the maximum power P3 calibrated on the external characteristic curve of the motor; judge whether the power P2 is greater than the maximum power P3;

[0029] A short-term power enhancement unit, configured to, when the power P2 is greater than the maximum power P3, control the motor to operate at power P4, and monitor the duration of the motor operating at the power P4; when the duration reaches a preset time T2, control the motor to resume its original power output state;

[0030] Wherein, the power P1 is the maximum power that the motor is allowed to continuously output within the time T2, and its value is greater than the maximum power P3; the power P4 is the minimum value between the power P1 and the power P2.

[0031] With the above technical solution, when the current power demand of the vehicle exceeds the maximum power value allowed by the external characteristic curve of the power system, the power system is controlled to break through the limit of the external characteristic curve and release more powerful power relative to the maximum power value. The duration of the continuous release of this power should be short, and this power cannot exceed the maximum power value allowed for continuous release by the power system in a short period of time, so as to meet the power demand of the vehicle under extreme working conditions without causing damage to the hardware of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In combination with the accompanying drawings and with reference to the following specific embodiments, the above and other features, advantages and aspects of the various embodiments of the present disclosure will become more apparent. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that the elements and elements are not necessarily drawn to scale.

[0033] Figure 1 It is a flowchart of a vehicle control method provided by the present application;

[0034] Figure 2 It is another flowchart of a vehicle control method provided by the present application;

[0035] Figure 3 It is another flowchart of a vehicle control method provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] When the vehicle faces certain extreme working conditions, even if the power system installed in the vehicle is running at full power and reaches the maximum power value that can be continuously output under the long-term stable operating conditions (i.e., conventional conditions) (i.e., the maximum power value allowed by the external characteristic curve of the power system), it is still difficult to meet the power demand under extreme working conditions. To solve the problem of insufficient power of the vehicle under extreme working conditions, the embodiments of the present application provide a vehicle control method, which adopts a short-term power enhancement mechanism, that is: when the current power demand of the vehicle exceeds the maximum power value allowed by the external characteristic curve of the power system, the power system is controlled to break through the limit of the external characteristic curve and release more powerful power relative to the maximum power value. The duration of the continuous release of this power should be short, and this power cannot exceed the maximum power value allowed for continuous release by the power system in a short period of time, so as to meet the power demand of the vehicle under extreme working conditions without causing damage to the hardware of the power system.

[0037] The following describes a vehicle control method provided by the embodiments of the present application in conjunction with the accompanying drawings. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0038] In the description, claims and the above-mentioned drawings of this application, terms such as "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinguishing objects with the same attributes when describing embodiments of this application. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product or device including a series of units does not have to be limited to those units, but may include other units not clearly listed or inherent to these processes, methods, products or devices.

[0039] See Figure 1 , for a traditional fuel vehicle (the power system of a traditional fuel vehicle is called a traditional fuel power system, which has an engine as the core component), a vehicle control method provided by an embodiment of this application specifically includes the following steps:

[0040] Step S01: When the short-term torque release mode preset in the vehicle is in an activated state, obtain the current torque Q2 required by the entire vehicle and the maximum torque Q3 calibrated on the external characteristic curve of the engine, and then enter Step S02.

[0041] Specifically, after the vehicle starts and runs, the driver can independently activate the short-term torque release mode preset in the vehicle (i.e., the short-term power enhancement mechanism applicable to traditional fuel vehicles). Once the vehicle encounters extreme working conditions subsequently, the system can automatically and quickly enable this short-term power enhancement mechanism. The way for the driver to activate the short-term torque release mode can be to operate a specific button, issue a voice command, or operate through a touch screen, etc., which is not limited.

[0042] The external characteristic curve of the engine refers to the curve of performance parameters such as power, torque, and fuel consumption changing with the speed when the engine is running at full load. This curve reflects the performance of the engine in the best working state, including the maximum power, the maximum torque Q3 and its corresponding speed. The external characteristic curve of the engine is usually accurately calibrated by the engine manufacturer based on the design parameters, material characteristics of the engine and a large amount of test data to ensure that the engine can safely and stably output the corresponding torque under long-term stable operating conditions throughout its service life cycle. In the existing vehicle development process, the engine output torque is limited not to exceed the maximum torque Q3 calibrated on the external characteristic curve of the engine to ensure the engine operates in a safe, stable and efficient state.

[0043] Step S02: Determine whether the torque Q2 is greater than the maximum torque Q3. If so, enter Step S03; if not, return to Step S01.

[0044] Step S03: Control the engine to operate at torque Q4, and monitor the duration of the engine operating continuously at torque Q4; when the duration reaches the preset time T1, control the engine to resume the original torque output state, and then return to Step S01; wherein, torque Q1 is the maximum torque that the engine is allowed to continuously output within time T1, Q1 > Q3, and Q4 = min(Q1, Q2).

[0045] Specifically, when the torque Q2 currently required by the vehicle is greater than the maximum torque Q3 calibrated on the engine's external characteristic curve, it indicates that the vehicle is currently facing an extreme working condition of insufficient power. In this extreme working condition, if the engine still follows the external characteristic curve to output torque (i.e., output torque according to the maximum torque Q3), the power demand in the extreme working condition cannot be met.

[0046] In response to this, the embodiment of the present application endows the engine with the ability of short-time power enhancement in extreme working conditions, that is, allows the engine to break through the limitation of the external characteristic curve and continuously output the maximum torque Q1 higher than Q3 within a short time (for example, within 60 seconds, that is, T1 ≤ 60 seconds). As long as the value of torque Q1 and the continuous output time are set reasonably, it will not cause damage to the engine hardware. Torque Q1 is the short-time maximum output torque allowed by the engine, and the actual output torque Q4 of the engine in extreme working conditions takes the minimum value of torque Q1 and torque Q2, so as to enable the vehicle to obtain the best power performance under the current hardware and safety constraints and alleviate the problem of insufficient power in extreme working conditions to the greatest extent.

[0047] In summary, the embodiment of the present application endows the engine with a short-time power enhancement mechanism, aiming to enable it to efficiently cope with extreme working conditions that require short-time strong power. When the vehicle faces such working conditions, this mechanism can help the vehicle fully exploit the stronger power potential of the engine, especially large-displacement engines, and thus avoid low operation efficiency caused by insufficient power in some extreme working conditions.

[0048] In a possible implementation, controlling the engine to resume the original torque output state as mentioned in any of the above embodiments may specifically include: controlling the engine to gradually resume (such as reducing the torque step by step, for example, reducing 50 N·m every 10 seconds) to the original torque output state, so as to avoid impacting the internal mechanical components of the engine due to torque mutation, reduce the wear risk, ensure the reliability and durability of the engine, and at the same time make the vehicle power transition smoothly, improve the ride comfort, and prevent the vehicle from experiencing jerks due to sudden power changes, affecting the driving stability.

[0049] In a possible implementation, before any of the above embodiments performs short-term power enhancement (i.e., controls the engine to operate according to torque Q4), it may further include: controlling the vehicle to issue a prompt message to remind the driver, enabling the driver to be aware of the vehicle state change in advance, make corresponding driving preparations, and improve driving safety. The prompt message can be presented in various ways, such as an eye-catching orange indicator light on the dashboard, accompanied by a simple and clear text prompt "Short-term power enhancement is about to start"; or the in-vehicle audio system plays a clear voice reminder to inform the driver that "Short-term power enhancement is about to start".

[0050] In a possible implementation, after any of the above embodiments controls the engine to operate according to torque Q4, it may further include: when receiving a first command issued by the user (i.e., the driver intervenes, such as reducing the throttle to forcibly end this short-term power enhancement), directly controlling the engine to return to the original torque output state and maintaining the short-term torque release mode in an active state, so that when the vehicle encounters extreme working conditions again later, the system can respond quickly.

[0051] In a possible implementation, when the short-term torque release mode is in an active state in any of the above embodiments, it may further include: when receiving a second command issued by the user, exiting the short-term torque release mode, thereby enabling the user to control the start and stop of this mode.

[0052] See Figure 2 , for a range-extended electric vehicle (the power system of a range-extended electric vehicle is called a range-extended electric power system, which takes the engine and the motor as core components; the engine is only used as a range extender, provides power for the motor by burning fuel, the motor converts mechanical energy into electrical energy, stores it in the battery or directly drives the vehicle; the vehicle is completely driven by the motor, and the engine does not directly participate in driving the wheels), a vehicle control method provided by an embodiment of the present application specifically includes the following steps:

[0053] Step S11: When the short-term power release mode preset in the vehicle is in an active state, obtain the current power P2 required by the whole vehicle and the maximum power P3 calibrated on the external characteristic curve of the motor, and then enter step S12.

[0054] Step S12: Determine whether the power P2 is greater than the maximum power P3. If so, enter step S13; if not, return to step S11.

[0055] Step S13: Control the motor to operate according to power P4, and monitor the time for which the motor continuously operates according to power P4; when the time reaches a preset time T2, control the motor to return to the original power output state, and then return to step S11; where power P1 is the maximum power that the motor is allowed to continuously output within the time T2, P1 > P3, and P4 = min(P1, P2).

[0056] Specifically, the short-term power enhancement mechanism can be applied not only to traditional fuel vehicles but also to range-extended electric vehicles. After the whole vehicle starts and runs, the driver can independently activate the short-term power release mode preset in the vehicle (i.e., the short-term power enhancement mechanism applicable to range-extended electric vehicles). Once the vehicle encounters extreme working conditions subsequently, the system can automatically and quickly enable this short-term power enhancement mechanism.

[0057] The external characteristic curve of the motor refers to the relationship curve among the power, torque, and speed of the motor when it operates at full load. The external characteristic curve of the motor is usually accurately calibrated by the motor manufacturer. In the existing whole vehicle development process, the output power of the motor is usually limited not to exceed the maximum power P3 calibrated on the external characteristic curve of the motor to ensure the safe, stable, and efficient operation of the range-extended electric power system.

[0058] When the power P2 currently required by the whole vehicle is greater than the maximum power P3 calibrated on the external characteristic curve of the motor, it indicates that the vehicle is currently facing an extreme working condition of insufficient power. Under this extreme working condition, if the power is still output according to the external characteristic curve of the motor (i.e., output power at the maximum power P3), the power demand under the extreme working condition cannot be met.

[0059] In response to this, the embodiment of the present application endows the motor with the short-term power enhancement ability under extreme working conditions, that is, allows the motor to break through the limitation of the external characteristic curve and continuously output the maximum power P1 higher than P3 within a short time T2 (for example, within 60 seconds, that is, T2≤60 seconds). As long as the value of the power P1 and the continuous output time are set reasonably, it will not cause hardware damage to the range-extended electric power system. The power P1 is the maximum short-term output power allowed by the motor. The actual output power P4 of the motor under extreme working conditions takes the minimum value of the power P1 and the power P2, so that the vehicle can obtain the best power performance under the current hardware and safety constraints and relieve the problem of insufficient power under extreme working conditions to the greatest extent.

[0060] In summary, Figure 2 The shown embodiment endows the range-extended electric power system with a short-term power enhancement mechanism, aiming to enable it to efficiently cope with extreme working conditions that require short-term powerful power. When the vehicle faces such working conditions, this mechanism can help the vehicle fully exploit the stronger power potential of the range-extended electric power system, especially the range-extended electric power system with a large-displacement engine + motor as the core components, thereby avoiding low operation efficiency due to insufficient power in some extreme working conditions.

[0061] In a possible implementation, in any of the above embodiments provided for range-extended electric vehicles, the control of the motor to resume the original power output state may specifically include: controlling the motor to gradually resume (such as reducing the power step by step, for example, reducing 20 kW every 10 seconds) to the original power output state.

[0062] In a possible implementation, before any of the above embodiments provided for range-extended electric vehicles performs short-term power enhancement (i.e., controlling the motor to operate at power P4), it may further include: controlling the vehicle to issue a prompt message to remind the driver, enabling the driver to be aware of the vehicle state change in advance, make corresponding driving preparations, and improve driving safety and controllability. The prompt message can be presented in various ways, such as a prominent orange indicator light on the dashboard, accompanied by a simple and clear text prompt of "Short-term power enhancement is about to start"; or the in-vehicle audio system plays a clear voice reminder to inform the driver that "Short-term power enhancement is about to start".

[0063] In a possible implementation, after any of the above embodiments provided for range-extended electric vehicles controls the motor to operate at power P4, it may further include: when receiving a third command issued by the user (i.e., the driver intervenes, such as reducing the throttle to forcibly end this short-term power enhancement), directly controlling the motor to resume the original power output state and maintaining the short-term power release mode in an active state, so that when the vehicle encounters extreme working conditions again in the future, the system can respond quickly.

[0064] In a possible implementation, when any of the above embodiments provided for range-extended electric vehicles is in the case where the short-term power release mode is in an active state, it may further include: when receiving a fourth command issued by the user, exiting the short-term power release mode, thereby enabling the user to control the start and stop of this mode.

[0065] The above embodiments have short-term improved the power performance of traditional fuel vehicles or range-extended electric vehicles under extreme working conditions. In addition, fuel economy is also one of the key concerns of vehicles. Compared with traditional fuel vehicles, range-extended electric vehicles usually have higher fuel economy for the following reasons:

[0066] Based on the characteristic curve of the engine, it can be known that the fuel economy of the engine is different under different combinations of engine speed and torque. There is an economic operating range within the operating range of the engine, and this range is usually located in the medium and low speed sections. When the engine is in the high speed section, the fuel consumption per unit time increases significantly.

[0067] In a range-extended electric vehicle, the main function of the engine is to provide electrical energy for the motor rather than directly drive the vehicle. Therefore, the operating point of the engine can be designed to be relatively fixed within the economic operating range to ensure that the engine operates in the most economical way.

[0068] In contrast, the engine of a traditional fuel vehicle directly drives the wheels and needs to operate under various complex working conditions, including starting, accelerating, cruising, climbing slopes, and overtaking. This makes it difficult for the engine to always operate within the economic operating range. Therefore, the engine of a traditional fuel vehicle has poor fuel economy during actual operation.

[0069] The poor fuel economy of traditional fuel vehicles is particularly prominent in mining trucks. Mining trucks usually need to frequently perform heavy-load climbing and unloading operations during mining operations, and these working conditions have extremely high requirements for the vehicle's power performance. To ensure the power output of mining trucks under complex road conditions, drivers are accustomed to operating at full throttle for a long time. However, although this operation method ensures the power performance of mining trucks, it also brings the following problems: Operating at full throttle for a long time makes the engine operate in a high-speed section above the rated speed N1 for a long time (that is, a high-speed section greater than the rated speed N1; the rated speed N1 of the engine is the speed value corresponding to the engine reaching the maximum power), deviating from the engine's efficient operating range and having extremely poor fuel economy; for mining trucks equipped with large-displacement engines, in most daily operation scenarios, they can easily complete transportation tasks without full throttle (that is, without operating in the high-speed section). Therefore, operating at full throttle for a long time will cause a large amount of unnecessary fuel waste.

[0070] In response to this, any of the above embodiments provided for traditional fuel vehicles can also preset an economic improvement mode for the vehicle. After the vehicle starts and runs, the driver can independently activate the economic improvement mode. Once the vehicle meets the condition of "being able to enter the economic operating range by upshifting and reducing the speed while ensuring the vehicle's power demand" during subsequent operation, the system can quickly take corresponding measures to optimize the engine's operating conditions, thereby improving fuel economy.

[0071] Specifically, referring to Figure 3 , any of the above embodiments provided for traditional fuel vehicles can also include:

[0072] Step S21: When the preset economic improvement mode in the vehicle is in an activated state, determine whether the current engine speed is greater than the rated speed N1. If so, proceed to step S22; if not, return to step S21.

[0073] Step S22: Determine whether the duration of the state where the current engine speed is greater than the rated speed N1 exceeds the preset time T3. If so, proceed to step S23; if not, return to step S21.

[0074] Step S23: Calculate the current power P8 required by the whole vehicle, and the maximum power P9 that the whole vehicle can output when the engine runs at a preset speed N2; N2 ≤ N1; if P9 ≥ P8, control the vehicle to send a prompt message, and control the engine to run at speed N2, and then return to step S21.

[0075] Specifically, if the duration of the state where the current engine speed is greater than the rated speed N1 exceeds a preset time T3 (such as 60 seconds), it indicates that the engine is in a high-speed section above the rated speed N1 that does not occur accidentally and deviates from the economic operation area. In this case, if the maximum power P9 that the whole vehicle can output when the engine runs at speed N2 (N2 ≤ N1) is greater than the current power P8 required by the whole vehicle, it means that the vehicle has the condition of "being able to enter the economic operation range by upshifting and reducing the speed while ensuring the power demand of the vehicle". Among them, the value of N2 is a speed calibration value specifically set after comprehensively considering factors such as the actual transportation road conditions in the mining area, the actual driving speed of the whole vehicle, and the weight of the goods carried; different road conditions, vehicle speed sections, and load sections will correspond to different N2 values. For example, when the road conditions are gentle, the vehicle speed and load of the whole vehicle are low, N2 is designed to be small; when the road slope is large, the vehicle speed and load of the whole vehicle are high, N2 is designed to be large.

[0076] When the vehicle has this condition, control the vehicle to send a prompt message to remind the driver that the engine speed will be adjusted soon and the driver needs to cooperate with the gear adjustment. Then, control the engine to run at speed N2, forcing the driver to upshift (if not upshifting, the vehicle speed will decrease, which does not meet the current driving needs of the driver), thereby achieving the purpose of upshifting and reducing the speed, and making the engine operation enter the economic operation area.

[0077] Through the upshifting operation, the transmission ratio of the transmission changes (the transmission ratio of the transmission refers to the ratio of the engine speed to the wheel speed. The upshifting operation will make the transmission ratio of the transmission smaller, and the downshifting operation will make the transmission ratio of the transmission larger. Also, since the wheel speed is positively correlated with the vehicle driving speed, the upshifting operation means that the engine speed decreases relative to the vehicle driving speed). When the vehicle driving speed remains basically stable or slightly increases (when the driving resistance power and transmission loss are basically unchanged, the vehicle speed is basically positively correlated with the engine power), the engine speed can be reduced, so that the engine enters the economic operation range from the high-speed area; at this time, the fuel injection volume of the engine decreases, and at the same time the mechanical friction loss decreases, thereby improving the fuel economy. And in this application, the motor speed is first reduced and then the driver is forced to upshift, which can guide the driver to form a driving habit that is more in line with the efficient operation of the vehicle. In the long run, it helps to extend the service life of the vehicle and save energy consumption.

[0078] Corresponding to the above method embodiments for traditional fuel vehicles, an embodiment of the present application further provides a vehicle control device, including:

[0079] A first condition judgment unit, configured to obtain the current torque Q2 required by the whole vehicle and the maximum torque Q3 calibrated on the external characteristic curve of the engine when the short-time torque release mode preset in the vehicle is in an active state; and judge whether the torque Q2 is greater than the maximum torque Q3;

[0080] A short-time torque enhancement unit, configured to control the engine to operate according to torque Q4 and monitor the time for which the engine continuously operates according to the torque Q4 when the torque Q2 is greater than the maximum torque Q3; when the time reaches a preset time T1, control the engine to return to the original torque output state;

[0081] Wherein, torque Q1 is the maximum torque that the engine is allowed to continuously output within the time T1, and its value is greater than the maximum torque Q3; the torque Q4 is the minimum value of the torque Q1 and the torque Q2.

[0082] In a possible implementation, the vehicle control device further includes:

[0083] A second condition judgment unit, configured to judge whether the current engine speed is greater than the rated speed N1 when the economy improvement mode preset in the vehicle is in an active state; if so, judge whether the duration of the state that the current engine speed is greater than the rated speed N1 exceeds a preset time T3; if it exceeds the time T3, calculate the current power P8 required by the whole vehicle, and calculate the maximum power P9 that the whole vehicle can output when the engine operates at a preset speed N2; the speed N2 is not greater than the speed N1;

[0084] An economy improvement unit, configured to control the vehicle to send a prompt message and control the engine to operate at the speed N2 when the power P9 is not less than the power P8.

[0085] Corresponding to the above method embodiments for range-extended electric vehicles, an embodiment of the present application further provides a vehicle control device, including:

[0086] A third condition judgment unit, configured to obtain the current power P2 required by the whole vehicle and the maximum power P3 calibrated on the external characteristic curve of the motor when the short-time power release mode preset in the vehicle is in an active state; and judge whether the power P2 is greater than the maximum power P3;

[0087] A short-time power enhancement unit, configured to control the motor to operate at power P4 when the power P2 is greater than the maximum power P3, and monitor the time for which the motor continuously operates at the power P4; when the time reaches a preset time T2, control the motor to resume the original power output state;

[0088] Wherein, the power P1 is the maximum power that the motor is allowed to continuously output within the time T2, and its value is greater than the maximum power P3; the power P4 is the minimum value of the power P1 and the power P2.

[0089] An embodiment of the present application further provides an electronic device, including at least one processor and a memory connected to the processor, wherein:

[0090] The memory is used to store a computer program;

[0091] The processor is used to execute the computer program so that the electronic device can implement any vehicle control method provided by the embodiments of the present application.

[0092] An embodiment of the present application further provides a computer program product, including computer-readable instructions, which, when running on an electronic device, enable the electronic device to implement any vehicle control method provided by the embodiments of the present application.

[0093] An embodiment of the present application further provides a computer-readable storage medium, which carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, can enable the electronic device to implement any vehicle control method provided by the embodiments of the present application.

[0094] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present application. Therefore, the embodiments of the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle control method, characterized in that: The vehicle is a fuel vehicle, and the method comprises: When the short-term torque release mode preset in the vehicle is activated, the torque Q2 currently required by the vehicle and the maximum torque Q3 calibrated on the external characteristic curve of the engine are obtained; Determine whether the torque Q2 is greater than the maximum torque Q3. If so, control the engine to run at the torque Q4, and monitor the time for which the engine runs at the torque Q4. When the time reaches a preset time T1, control the engine to return to the original torque output state. The torque Q1 is the maximum torque that the engine is allowed to continuously output within the time T1, and its value is greater than the maximum torque Q3; the torque Q4 is the minimum value between the torque Q1 and the torque Q2.

2. The vehicle control method according to claim 1, characterized in that: Before controlling the engine to run according to the torque Q4, the method further includes: controlling the vehicle to issue a prompt message.

3. The vehicle control method according to claim 1 or 2, characterized in that: After controlling the engine to run according to the torque Q4, the method further includes: when receiving a first command issued by a user, directly controlling the engine to return to the original torque output state and maintaining the short-time torque release mode in an activated state.

4. The vehicle control method according to claim 1, characterized in that: The method further comprises: When the economy improvement mode preset in the vehicle is activated, it is determined whether the current engine speed is greater than the rated speed N1, and if so, whether the duration of the state that the current engine speed is greater than the rated speed N1 exceeds a preset time T3; If the time T3 is exceeded, the power P8 currently required by the vehicle is calculated, and the maximum power P9 that the vehicle can output when the engine runs at a preset speed N2 is calculated; the speed N2 is not greater than the speed N1; If the power P9 is not less than the power P8, the vehicle is controlled to issue a prompt message, and the engine is controlled to run at the speed N2.

5. A vehicle control method, characterized in that: The vehicle is an extended-range electric vehicle, and the method comprises: When the short-time power release mode preset in the vehicle is activated, the power P2 currently required by the vehicle and the maximum power P3 calibrated on the external characteristic curve of the motor are obtained; Determine whether the power P2 is greater than the maximum power P3. If so, control the motor to run at the power P4, and monitor the time the motor continues to run at the power P4; when the time reaches a preset time T2, control the motor to return to the original power output state; The power P1 is the maximum power that the motor is allowed to continuously output within the time T2, and its value is greater than the maximum power P3; the power P4 is the minimum value between the power P1 and the power P2.

6. The vehicle control method according to claim 5, characterized in that: Before controlling the motor to operate at the power P4, the method further includes: controlling the vehicle to issue a prompt message.

7. The vehicle control method according to claim 5 or 6, characterized in that: After controlling the motor to run at the power P4, the method further includes: when receiving a third command sent by the user, directly controlling the motor to return to the original power output state and maintaining the short-time power release mode in an activated state.

8. A vehicle control device, characterized in that: The vehicle is a fuel vehicle, and the device comprises: The first condition judgment unit is used to obtain the torque Q2 currently required by the whole vehicle and the maximum torque Q3 calibrated on the external characteristic curve of the engine when the short-term torque release mode preset in the vehicle is in an activated state; and judge whether the torque Q2 is greater than the maximum torque Q3; a short-time torque enhancement unit, for controlling the engine to operate at a torque Q4 when the torque Q2 is greater than the maximum torque Q3, and monitoring the time for which the engine continues to operate at the torque Q4; when the time reaches a preset time T1, controlling the engine to return to an original torque output state; The torque Q1 is the maximum torque that the engine is allowed to continuously output within the time T1, and its value is greater than the maximum torque Q3; the torque Q4 is the minimum value between the torque Q1 and the torque Q2.

9. The vehicle control device according to claim 8, characterized in that: The device also includes: The second condition judgment unit is used to judge whether the current engine speed is greater than the rated speed N1 when the economy improvement mode preset in the vehicle is in an activated state, and if so, to judge whether the duration of the state that the current engine speed is greater than the rated speed N1 exceeds a preset time T3; if it exceeds the time T3, to calculate the power P8 currently required by the whole vehicle, and to calculate the maximum power P9 that the whole vehicle can output when the engine runs at a preset speed N2; the speed N2 is not greater than the speed N1; The economy improvement unit is used to control the vehicle to send out a prompt message and control the engine to run at the speed N2 when the power P9 is not less than the power P8.

10. A vehicle control device, characterized in that: The vehicle is an extended-range electric vehicle, and the device comprises: The third condition judgment unit is used to obtain the power P2 currently required by the whole vehicle and the maximum power P3 calibrated on the external characteristic curve of the motor when the short-time power release mode preset in the vehicle is activated; and judge whether the power P2 is greater than the maximum power P3; A short-time power enhancement unit is used to control the motor to operate at a power of P4 when the power P2 is greater than the maximum power P3, and monitor the time for which the motor continues to operate at the power P4; when the time reaches a preset time T2, control the motor to return to the original power output state; The power P1 is the maximum power that the motor is allowed to continuously output within the time T2, and its value is greater than the maximum power P3; the power P4 is the minimum value between the power P1 and the power P2.

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