CN115992769A - AMT-based engine speed control method and device, vehicle and storage medium - Google Patents
AMT-based engine speed control method and device, vehicle and storage medium Download PDFInfo
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- CN115992769A CN115992769A CN202310287199.XA CN202310287199A CN115992769A CN 115992769 A CN115992769 A CN 115992769A CN 202310287199 A CN202310287199 A CN 202310287199A CN 115992769 A CN115992769 A CN 115992769A
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Abstract
The invention relates to the technical field of vehicles, and particularly discloses an engine speed control method and device based on an AMT, a vehicle and a storage medium, wherein the engine speed control method based on the AMT comprises the following steps: when the vehicle exits the neutral gear sliding state, judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition, and if the vehicle is in the non-emergency speed regulation working condition; acquiring a target gear and determining the target rotating speed of the engine based on the target gear; and meanwhile, the engine sends out an adjustment rotating speed to the engine, the engine responds to the adjustment rotating speed and adjusts the actual rotating speed of the engine, the engine adjusts the speed based on the adjustment rotating speed, and the adjustment rotating speed gradually changes to the target rotating speed within a period of time, so that the current rotating speed of the engine is gradually changed to the target rotating speed within a period of time, the sudden and large adjustment of the rotating speed of the engine can be avoided, the output of larger torque is further avoided, and the economy and NVH performance of the engine can be effectively ensured.
Description
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to an AMT-based engine speed control method, apparatus, vehicle, and storage medium.
Background
In the prior art, when the AMT (Automated Mechanical Transmission; the automatic transmission with electronic control) exits from neutral gear coasting, the corresponding target rotating speed of the engine is usually calculated according to the current vehicle speed and the target gear, the target rotating speed is directly sent to the engine, and the current rotating speed is adjusted to the target rotating speed according to calibrated PID (Proportional, integral, derivative; proportional, integral and differential) control parameters. In the prior art, however, the target rotating speed of the engine is directly sent out under any working condition when the engine exits from neutral gear and slides, and when the deviation between the current rotating speed of the engine and the target rotating speed is large, the engine needs to output large torque for completing the rotating speed adjustment, so that the economy and NVH ((Noise, vibration, harshness; noise, vibration and harshness) performance of the engine are poor.
Disclosure of Invention
The invention aims at: the method, the device, the vehicle and the storage medium for controlling the engine rotating speed based on the AMT are provided, so that the problem that in the prior art, the AMT directly sends out the target rotating speed of the engine under any working condition when the AMT exits from neutral gear sliding, when the deviation between the current rotating speed of the engine and the target rotating speed is large, the engine needs to output large torque for completing rotating speed adjustment, and the engine economy and NVH performance are poor is solved.
In one aspect, the present invention provides an AMT-based engine speed control method, including:
determining that the vehicle is in a neutral coasting state;
judging whether the vehicle meets a neutral sliding state exit condition or not;
if yes, judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition; the emergency speed regulation working condition comprises emergency braking or emergency acceleration, and the non-emergency speed regulation working condition comprises non-emergency braking or non-emergency acceleration, wherein the position change rate of a brake pedal during emergency braking is larger than that during non-emergency braking, and the position change rate of an accelerator pedal during emergency acceleration is larger than that during non-emergency acceleration;
if the vehicle is in a non-emergency speed regulation working condition;
acquiring a target gear and determining the target rotating speed of the engine based on the target gear;
sending an adjusting rotating speed to an engine, wherein the adjusting rotating speed is a change value and can gradually reach the target rotating speed along with time;
the engine is responsive to the adjusted rotational speed and adjusts the actual rotational speed of the engine.
As a preferable technical scheme of the AMT-based engine speed control method, the formula of the difference between the adjustment speed and the idle speed is:
N=at 2 +bt+c; n is the difference between the adjustment rotating speed and the idle speed, the maximum value of N is equal to the difference between the target rotating speed and the idle speed, t is time, a, b and c are calibrated quantities, and a, b and c are coefficients.
As a preferable technical scheme of the engine speed control method based on the AMT, when the non-emergency speed regulation working condition is non-emergency braking, a, b and c are all determined based on the opening degree of a brake pedal; when the non-emergency speed regulation is disclosed as non-emergency acceleration, a, b, c are each determined based on the accelerator pedal opening.
As a preferable technical scheme of the engine speed control method based on the AMT, when judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition, if the vehicle is in the emergency speed regulation working condition;
acquiring a target gear and determining the target rotating speed of the engine based on the target gear;
sending the target rotating speed to an engine;
the engine responds to the target rotational speed and adjusts the actual rotational speed of the engine to the target rotational speed.
As a preferable technical scheme of the AMT-based engine speed control method, judging whether the vehicle is in an emergency speed regulation working condition comprises the following steps:
acquiring an accelerator pedal opening of a vehicle, a change rate of the accelerator pedal opening, a brake pedal opening and a change rate of the brake pedal opening;
if the accelerator pedal opening of the vehicle is not smaller than the first set opening, the change rate of the accelerator pedal opening is not smaller than the first set change rate, and the continuous acceleration duration is not smaller than the first set time; or, the brake pedal opening of the vehicle is not less than the second set opening, the change rate of the brake pedal opening is not less than the second set change rate, and the continuous braking duration is not less than the first set time; then it is determined that the vehicle is in an emergency speed regulation condition.
As a preferable technical scheme of the AMT-based engine speed control method, judging whether the vehicle is in a non-emergency speed regulation working condition comprises the following steps:
acquiring an accelerator pedal opening of a vehicle, a change rate of the accelerator pedal opening, a brake pedal opening and a change rate of the brake pedal opening;
if the accelerator pedal opening of the vehicle is not smaller than the third set opening, the change rate of the accelerator pedal opening is smaller than the first set change rate, and the continuous acceleration duration is not smaller than the second set time; or, the brake pedal opening of the vehicle is not less than the fourth set opening, the change rate of the brake pedal opening is less than the second set change rate, and the duration of the continuous braking is not less than the second set time; then it is determined that the vehicle is in a non-emergency speed regulation condition.
On the other hand, the invention also provides a control device of the AMT transmission, which comprises:
the determining module is used for determining that the vehicle is in a neutral gear sliding state;
the first judging module is used for judging whether the vehicle meets the neutral sliding state exit condition or not;
the second judging module is used for judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition when the vehicle meets the exit condition of the neutral gear sliding state; the emergency speed regulation working condition comprises emergency braking or emergency acceleration, the non-emergency speed regulation working condition comprises non-emergency braking or non-emergency acceleration, the position change rate of the brake pedal is larger than that of the brake pedal in non-emergency braking when the emergency braking is performed, and the position change rate of the accelerator pedal is larger than that of the accelerator pedal in non-emergency acceleration when the emergency acceleration is performed;
the first target rotating speed determining module is used for acquiring a target gear when the vehicle is in a non-emergency speed regulation working condition and determining the target rotating speed of the engine based on the target gear;
the adjusting rotating speed sending module is used for sending an adjusting rotating speed to the engine, wherein the adjusting rotating speed is a change value and can gradually reach the target rotating speed along with time;
and the first response module is used for enabling the engine to respond to the adjustment rotating speed and adjusting the actual rotating speed of the engine.
In a preferred embodiment of the control device for an AMT transmission, the control device for an AMT transmission further comprises:
the second target rotating speed determining module is used for acquiring a target gear when the vehicle is in an emergency speed regulation working condition and determining the target rotating speed of the engine based on the target gear;
the target rotating speed sending module is used for sending the target rotating speed to the engine;
and the second response module is used for enabling the engine to respond to the target rotating speed and adjusting the actual rotating speed of the engine to the target rotating speed.
In yet another aspect, the present invention also provides a vehicle including an AMT and an engine, the vehicle further comprising:
a controller;
a memory for storing one or more programs;
the one or more programs, when executed by the controller, cause the controller to control the vehicle to implement an AMT-based engine speed control method as described in any one of the above aspects.
In yet another aspect, the present invention further provides a storage medium having stored thereon a computer program which, when executed by a controller, causes a vehicle to implement an AMT-based engine speed control method as set forth in any one of the above aspects.
The beneficial effects of the invention are as follows:
the invention provides an AMT-based engine speed control method, an AMT-based engine speed control device, a vehicle and a storage medium, wherein in the AMT-based engine speed control method, when the vehicle exits from a neutral sliding state, whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition is judged, and if the vehicle is in the non-emergency speed regulation working condition; acquiring a target gear and determining the target rotating speed of the engine based on the target gear; and meanwhile, the engine sends out an adjustment rotating speed to the engine, the engine responds to the adjustment rotating speed and adjusts the actual rotating speed of the engine, the engine adjusts the speed based on the adjustment rotating speed, and the adjustment rotating speed gradually changes to the target rotating speed within a period of time, so that the current rotating speed of the engine is gradually changed to the target rotating speed within a period of time, the sudden and large adjustment of the rotating speed of the engine can be avoided, the output of larger torque is further avoided, and the economy and NVH performance of the engine can be effectively ensured.
Drawings
FIG. 1 is a flow chart of an AMT-based engine speed control method in an embodiment of the present invention;
FIG. 2 is a graph showing the relationship between the opening of the brake pedal and the coefficients a, b, and c, respectively, in the embodiment of the present invention;
FIG. 3 is a graph showing the relationship between the opening of the accelerator pedal and the coefficients a, b, and c, respectively, in the embodiment of the present invention;
FIG. 4 is a schematic diagram of an AMT-based engine speed control device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
In the figure:
110. a determining module; 120. a first judgment module; 130. a second judging module; 140. a first target rotational speed determination module; 150. the rotating speed sending module is adjusted; 160. a first response module;
210. AMT; 220. an engine; 230. a controller; 240. a memory.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Example 1
In the prior art, when the AMT exits from neutral gear coasting, the AMT generally calculates a target rotating speed corresponding to the engine according to the current vehicle speed and the target gear, directly sends the target rotating speed to the engine, and adjusts the current rotating speed to the target rotating speed according to calibrated PID control parameters based on the current rotating speed and the target rotating speed. In the prior art, however, the target rotating speed of the engine is directly sent out under any working condition when the engine exits from neutral gear and slides, and when the deviation between the current rotating speed of the engine and the target rotating speed is large, the engine needs to output large torque for completing the rotating speed adjustment, so that the economy and NVH performance of the engine are poor.
In view of this, the present embodiment provides an AMT-based engine speed control method to solve the above-mentioned problems. The AMT-based engine speed control method can be suitable for controlling the speed of the engine when the AMT is out of a neutral gear sliding state, so that the speed of the engine is matched with the current gear. The AMT-based engine speed control method may be performed by an AMT-based engine speed control device that may be implemented in software and/or hardware and integrated in a vehicle.
Specifically, as shown in fig. 1, the AMT-based engine speed control method includes the following steps:
as shown in fig. 1, the present embodiment provides an AMT-based engine speed control method, which includes the steps of:
s100: the vehicle is determined to be in a neutral coasting state.
When the vehicle is in a neutral coasting state, the clutch is disengaged, and the AMT is in neutral. The control can specifically judge whether the vehicle is in a neutral sliding state or not through interaction with the whole vehicle controller. When the vehicle is in a neutral coasting state, the engine is at idle.
S200: and judging whether the vehicle meets the neutral sliding state exit condition.
When the driver actively steps on the brake pedal and the accelerator pedal, the AMT may be caused to exit the neutral sliding state. In addition, when the vehicle is in the neutral coasting state, if the vehicle speed is lower than a set boundary value, the AMT is also caused to exit the neutral coasting state.
When the vehicle satisfies the neutral coast state exit condition, S300 is executed. When the vehicle does not satisfy the neutral coast state exit condition, S100 is re-executed.
S300: and judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition.
If the vehicle is in a non-emergency speed regulation working condition; step S400 is performed.
Specifically, the emergency speed regulation working condition comprises emergency braking or emergency acceleration, and the non-emergency speed regulation working condition comprises non-emergency braking or non-emergency acceleration, wherein the position change rate of the brake pedal in emergency braking is larger than that in non-emergency braking, and the position change rate of the accelerator pedal in emergency acceleration is larger than that in non-emergency acceleration. Through step S300, it may be determined that the vehicle is in a neutral gear coasting state and is suitable for active intervention by a driver stepping on a brake pedal or an accelerator pedal, when the AMT is in the neutral gear coasting state, a suitable target gear is matched based on a current vehicle speed of the vehicle, and in addition, according to different gears, a suitable target engine speed needs to be matched, so that when the AMT is in the neutral gear coasting state, an actual engine speed needs to be adjusted from an idle speed to a corresponding target speed.
In S300, determining whether the vehicle is in an emergency speed regulation condition includes the following steps:
the accelerator pedal opening, the rate of change of the accelerator pedal opening, the brake pedal opening, and the rate of change of the brake pedal opening of the vehicle are obtained.
If the accelerator pedal opening of the vehicle is not smaller than the first set opening, the change rate of the accelerator pedal opening is not smaller than the first set change rate, and the continuous acceleration duration is not smaller than the first set time; or, the brake pedal opening of the vehicle is not less than the second set opening, the change rate of the brake pedal opening is not less than the second set change rate, and the continuous braking duration is not less than the first set time; the vehicle is determined to be in an emergency speed regulation condition.
In this embodiment, the first set opening, the second set opening, the first set change rate, the second set change rate, and the first set time may be set according to actual needs.
In S300, judging whether the vehicle is in a non-emergency speed regulation working condition comprises the following steps:
the accelerator pedal opening, the rate of change of the accelerator pedal opening, the brake pedal opening, and the rate of change of the brake pedal opening of the vehicle are obtained.
If the accelerator pedal opening of the vehicle is not smaller than the third set opening, the change rate of the accelerator pedal opening is smaller than the first set change rate, and the continuous acceleration duration is not smaller than the second set time; or, the brake pedal opening of the vehicle is not less than the fourth set opening, the change rate of the brake pedal opening is less than the second set change rate, and the duration of the continuous braking is not less than the second set time; it is determined that the vehicle is in a non-emergency speed regulation condition.
In this embodiment, the third setting opening, the fourth setting opening, and the second setting time may be set according to actual needs.
S400: the target gear is obtained, and a target rotational speed of the engine is determined based on the target gear.
The mode of acquiring the target gear is the prior art, and can be acquired through integrating a position sensor of the AMT, and can also be determined through the transmission ratio of the AMT. Since different target engine speeds need to be matched for different gears, the target engine speed can be determined by the target gear. Specifically, a corresponding relationship between a target gear and a target rotation speed may be preset in the controller in advance, and a corresponding target rotation speed may be queried from the corresponding relationship based on the obtained target gear. The correspondence can be obtained by a large number of tests in the early stage.
S500: and sending out the regulated rotating speed to the engine.
The rotation speed is adjusted to be a change value, and the rotation speed can be gradually increased to a target rotation speed along with time.
Specifically, in this embodiment, the formula for adjusting the difference between the rotation speed and the idle speed is:
N=at 2 +bt+c; wherein N is the difference between the adjustment rotation speed and the idle speed, the maximum value of N is equal to the difference between the target rotation speed and the idle speed, t is time, a, b and c are calibrated amounts, and a, b and c are coefficients.
As can be seen from the above formula, the actual rotation speed of the engine=idle+n, so that the actual rotation speed of the engine increases to the target rotation speed after a certain time period. Based on the three coefficients a, b and c, the specific value of t can be solved by combining the difference value between the target rotating speed and the idle speed, and the gradual change of the adjusting rotating speed to the target rotating speed can be determined.
In other embodiments, the formula for adjusting the difference between the rotation speed and the idle speed may be set as other mathematical relationship models or as a deep learning model as required.
Referring to fig. 2, in the present embodiment, when the non-emergency speed regulation condition is non-emergency braking, a, b, c are all determined based on the opening of the brake pedal; referring to fig. 3, when the non-emergency speed regulation is disclosed as non-emergency acceleration, a, b, c are all determined based on the accelerator opening.
S600: the engine is responsive to the adjusted rotational speed and adjusts the actual rotational speed of the engine.
In this embodiment, since the adjustment rotational speed changes with time, the actual rotational speed of the engine is adjusted to be the same as the specific value of the received adjustment rotational speed with time synchronization when the engine responds to the adjustment rotational speed.
According to the engine speed control method of the AMT, when the vehicle is determined to be in the neutral sliding state, whether the vehicle meets the exit condition of the neutral sliding state or not is judged, if yes, whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition is judged, and if the vehicle is in the non-emergency speed regulation working condition; further acquiring a target gear and determining a target rotating speed of the engine based on the target gear; and simultaneously sending an adjustment rotation speed to the engine, and responding to the adjustment rotation speed and adjusting the actual rotation speed of the engine. When the vehicle is in a non-emergency speed regulation working condition, the change requirement on the speed is not urgent, the engine is regulated based on the regulation rotating speed, the regulation rotating speed gradually changes to the target rotating speed within a period of time, so that the current rotating speed of the engine is gradually changed to the target rotating speed within a period of time, the sudden and large adjustment of the rotating speed of the engine can be avoided, the output of larger torque is avoided, and the economy and NVH performance of the engine can be effectively guaranteed.
Optionally, when determining whether the vehicle is in the emergency speed regulation working condition or the non-emergency speed regulation working condition, if the vehicle is in the emergency speed regulation working condition, executing the steps S700-S900.
S700: the target gear is obtained, and a target rotational speed of the engine is determined based on the target gear.
S800: sending a target rotating speed to an engine;
s900: the engine responds to the target rotational speed and adjusts the actual rotational speed of the engine to the target rotational speed.
When the vehicle is in an emergency speed regulation working condition, the fact that the vehicle has urgent requirements for speed change is indicated, so that the current rotating speed of the engine is directly regulated to be the target rotating speed in the shortest time, and driving safety is guaranteed.
Example two
Fig. 4 is a block diagram of an AMT-based engine speed control device according to a second embodiment of the present invention, where the AMT-based engine speed control device may execute the AMT-based engine speed control method according to the above embodiment.
Specifically, the AMT-based engine speed control device includes a determination module 110, a first determination module 120, a second determination module 130, a first target speed determination module 140, an adjustment speed issue module 150, and a first response module 160.
Wherein, the determining module 110 is configured to determine that the vehicle is in a neutral coasting state; the first determining module 120 is configured to determine whether the vehicle meets a neutral coasting state exit condition; the second judging module 130 is configured to judge whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition when the vehicle meets a neutral coast state exit condition; the first target rotation speed determining module 140 is configured to obtain a target gear when the vehicle is in a non-emergency speed regulation working condition, and determine a target rotation speed of the engine based on the target gear; the adjustment rotation speed sending module 150 is configured to send an adjustment rotation speed to the engine; the first response module 160 is configured to cause the engine to respond to the adjusted rotational speed and to adjust an actual rotational speed of the engine.
The engine speed control device provided in this embodiment determines that the vehicle is in a neutral coasting state through the determination module 110; judging whether the vehicle meets the neutral coasting state exit condition or not through the first judging module 120; judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition through the second judging module 130 when the vehicle meets the neutral gear sliding state exit condition; acquiring a target gear through the first target rotation speed determining module 140 when the vehicle is in a non-emergency speed regulation working condition, and determining the target rotation speed of the engine based on the target gear; the adjusting rotation speed sending module 150 is used for sending an adjusting rotation speed to the engine; the first response module 160 is used for enabling the engine to respond to the adjustment rotation speed and adjusting the actual rotation speed of the engine, and the adjustment rotation speed gradually changes to the target rotation speed within a period of time, so that the current rotation speed of the engine can be smoothly transited to the target rotation speed within a period of time, the abrupt and large adjustment of the rotation speed of the engine can be avoided, further, the output of larger torque is avoided, and the economy and NVH performance of the engine can be effectively ensured.
Optionally, the control device of the AMT transmission further comprises: the system comprises a second target rotating speed determining module, a target rotating speed sending module and a second response module. The second target rotating speed determining module is used for acquiring a target gear when the vehicle is in an emergency speed regulating working condition and determining the target rotating speed of the engine based on the target gear; the target rotating speed sending module is used for sending the target rotating speed to the engine; the second response module is used for enabling the engine to respond to the target rotating speed and adjusting the actual rotating speed of the engine to the target rotating speed.
Example III
Fig. 5 is a block diagram of a vehicle according to a third embodiment of the present invention, and specifically, referring to fig. 5, the vehicle includes an AMT210, an engine 220, a controller 230, and a memory 240. Among other things, AMT210, engine 220, controller 230, and memory 240 may be connected by a bus.
The memory 240 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and a module, such as program instructions/modules corresponding to the AMT-based engine speed control method according to an embodiment of the present invention. The controller 230 executes various functional applications of the vehicle and data processing, i.e., implements the AMT-based engine speed control method of the above-described embodiment, by running software programs, instructions, and modules stored in the memory 240.
The memory 240 mainly includes a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 240 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 240 may further include memory remotely located with respect to controller 230, which may be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The vehicle provided in the third embodiment of the present invention belongs to the same inventive concept as the AMT-based engine speed control method provided in the above embodiment, and technical details not described in detail in the present embodiment can be seen in the above embodiment, and the present embodiment has the same advantages of executing the AMT-based engine speed control method.
Example IV
A fourth embodiment of the present invention also provides a storage medium having stored thereon a computer program which, when executed by a controller, causes a vehicle to implement the AMT-based engine speed control method according to the above embodiment of the present invention.
Of course, the storage medium containing the computer executable instructions provided by the embodiment of the invention is not limited to the operations in the AMT-based engine speed control method, but can also execute the related operations in the AMT-based engine speed control method provided by the embodiment of the invention, and has corresponding functions and beneficial effects.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a robot, a personal computer, a server, or a network device, etc.) to execute the AMT-based engine speed control method according to the embodiments of the present invention.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. An AMT-based engine speed control method, comprising:
determining that the vehicle is in a neutral coasting state;
judging whether the vehicle meets a neutral sliding state exit condition or not;
if yes, judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition; the emergency speed regulation working condition comprises emergency braking or emergency acceleration, and the non-emergency speed regulation working condition comprises non-emergency braking or non-emergency acceleration, wherein the position change rate of a brake pedal during emergency braking is larger than that during non-emergency braking, and the position change rate of an accelerator pedal during emergency acceleration is larger than that during non-emergency acceleration;
if the vehicle is in a non-emergency speed regulation working condition;
acquiring a target gear and determining the target rotating speed of the engine based on the target gear;
sending an adjusting rotating speed to an engine, wherein the adjusting rotating speed is a change value and can gradually reach the target rotating speed along with time;
the engine is responsive to the adjusted rotational speed and adjusts the actual rotational speed of the engine.
2. The AMT-based engine speed control method according to claim 1, wherein said formula for adjusting the difference between the rotational speed and the idle speed is:
N=at 2 +bt+c; n is the difference between the adjustment rotating speed and the idle speed, the maximum value of N is equal to the difference between the target rotating speed and the idle speed, t is time, a, b and c are calibrated quantities, and a, b and c are coefficients.
3. The AMT-based engine speed control method as claimed in claim 2, wherein a, b, c are each determined based on a brake pedal opening degree when the non-emergency governor condition is non-emergency braking; when the non-emergency speed regulation is disclosed as non-emergency acceleration, a, b, c are each determined based on the accelerator pedal opening.
4. The AMT-based engine speed control method as claimed in any one of claims 1 to 3, wherein if said vehicle is in an emergency speed control condition when judging whether said vehicle is in an emergency speed control condition or a non-emergency speed control condition;
acquiring a target gear and determining the target rotating speed of the engine based on the target gear;
sending the target rotating speed to an engine;
the engine responds to the target rotational speed and adjusts the actual rotational speed of the engine to the target rotational speed.
5. The AMT-based engine speed control method of claim 4, wherein determining whether the vehicle is in an emergency speed control condition comprises:
acquiring an accelerator pedal opening of a vehicle, a change rate of the accelerator pedal opening, a brake pedal opening and a change rate of the brake pedal opening;
if the accelerator pedal opening of the vehicle is not smaller than the first set opening, the change rate of the accelerator pedal opening is not smaller than the first set change rate, and the continuous acceleration duration is not smaller than the first set time; or, the brake pedal opening of the vehicle is not less than the second set opening, the change rate of the brake pedal opening is not less than the second set change rate, and the continuous braking duration is not less than the first set time; then it is determined that the vehicle is in an emergency speed regulation condition.
6. The AMT-based engine speed control method as claimed in claim 5, wherein,
judging whether the vehicle is in a non-emergency speed regulation working condition comprises the following steps:
acquiring an accelerator pedal opening of a vehicle, a change rate of the accelerator pedal opening, a brake pedal opening and a change rate of the brake pedal opening;
if the accelerator pedal opening of the vehicle is not smaller than the third set opening, the change rate of the accelerator pedal opening is smaller than the first set change rate, and the continuous acceleration duration is not smaller than the second set time; or, the brake pedal opening of the vehicle is not less than the fourth set opening, the change rate of the brake pedal opening is less than the second set change rate, and the duration of the continuous braking is not less than the second set time; then it is determined that the vehicle is in a non-emergency speed regulation condition.
7. A control device of an AMT transmission, comprising:
the determining module is used for determining that the vehicle is in a neutral gear sliding state;
the first judging module is used for judging whether the vehicle meets the neutral sliding state exit condition or not;
the second judging module is used for judging whether the vehicle is in an emergency speed regulation working condition or a non-emergency speed regulation working condition when the vehicle meets the exit condition of the neutral gear sliding state; the emergency speed regulation working condition comprises emergency braking or emergency acceleration, the non-emergency speed regulation working condition comprises non-emergency braking or non-emergency acceleration, the position change rate of the brake pedal is larger than that of the brake pedal in non-emergency braking when the emergency braking is performed, and the position change rate of the accelerator pedal is larger than that of the accelerator pedal in non-emergency acceleration when the emergency acceleration is performed;
the first target rotating speed determining module is used for acquiring a target gear when the vehicle is in a non-emergency speed regulation working condition and determining the target rotating speed of the engine based on the target gear;
the adjusting rotating speed sending module is used for sending an adjusting rotating speed to the engine, wherein the adjusting rotating speed is a change value and can gradually reach the target rotating speed along with time;
and the first response module is used for enabling the engine to respond to the adjustment rotating speed and adjusting the actual rotating speed of the engine.
8. The AMT transmission control apparatus defined in claim 7, further comprising:
the second target rotating speed determining module is used for acquiring a target gear when the vehicle is in an emergency speed regulation working condition and determining the target rotating speed of the engine based on the target gear;
the target rotating speed sending module is used for sending the target rotating speed to the engine;
and the second response module is used for enabling the engine to respond to the target rotating speed and adjusting the actual rotating speed of the engine to the target rotating speed.
9. A vehicle comprising an AMT and an engine, the vehicle further comprising:
a controller;
a memory for storing one or more programs;
the one or more programs, when executed by the controller, cause the controller to control a vehicle to implement the AMT-based engine speed control method of any one of claims 1-6.
10. A storage medium having a computer program stored thereon, wherein the program, when executed by a controller, causes a vehicle to implement the AMT-based engine speed control method according to any one of claims 1 to 6.
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| JP2018017372A (en) * | 2016-07-29 | 2018-02-01 | いすゞ自動車株式会社 | Automatic shift controller |
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| JPH06241313A (en) * | 1993-02-17 | 1994-08-30 | Mitsubishi Motors Corp | Remote-control type transmission |
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|---|---|
| CN115992769B (en) | 2023-06-23 |
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