CN111284475A - Method and system for constant-speed cruise control of heavy truck - Google Patents
Method and system for constant-speed cruise control of heavy truck Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/14—Adaptive cruise control
- B60W30/143—Speed control
- B60W30/146—Speed limiting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/10—Longitudinal speed
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Abstract
The invention discloses a method and a system for controlling constant-speed cruising of a heavy truck, wherein the method comprises the following steps: starting the constant-speed cruising of the heavy truck; determining a constant-speed cruising target speed; calculating an engine target torque according to the constant-speed cruise target speed and the current speed; and if the compensation condition is met, performing acceleration control compensation. The invention realizes the accurate control of the vehicle speed within the range of 10km/h to 110km/h, and simultaneously prevents the problems of poor comfort and increased oil consumption caused by overlarge vehicle acceleration.
Description
Technical Field
The invention relates to a method and a system for constant-speed cruise control of a heavy truck, and belongs to the technical field of vehicle control.
Background
Heavy trucks are one of the most important delivery vehicles for promoting economic development in China, and are applied to many industries, and the use mode of the heavy trucks has the characteristics of long driving distance, multiple operating conditions and the like, so that some basic driving assistance functions are necessary, and constant-speed cruising is an important function for improving the driving experience of heavy automobiles.
The constant-speed cruising of the vehicle is that when a driver drives a certain speed, the current speed is set as the cruising speed through a series of keys, and the constant-speed cruising function is activated, at the moment, an accelerator pedal is fixed at the position of the accelerator pedal corresponding to the speed when cruising is set, and an engine management system fixes the speed near the speed value set by the driver by acquiring the position signal of the accelerator pedal; the driver can cancel the constant-speed cruise by stepping on the brake pedal, pressing the constant-speed cruise cancel button, stepping on the accelerator pedal and the like.
Heavy trucks have the characteristics of heavy body weight, large engine output torque, large transmission ratio range and the like, easily cause the problems of inaccurate vehicle speed control and the like, and most of the current heavy trucks do not support constant-speed cruising under low-speed working conditions and can not meet some special requirements.
In view of the current situation, it is necessary to provide a control measure for a constant-speed cruise system of a heavy-duty car to realize accurate control of the speed of the heavy-duty car in a large speed range.
Disclosure of Invention
In order to solve the problems, the invention provides a method and a system for controlling constant-speed cruise of a heavy truck, which can realize accurate control of the speed of the truck in a larger speed range.
The technical scheme adopted for solving the technical problems is as follows:
in one aspect, an embodiment of the present invention provides a method for controlling a constant-speed cruise of a heavy truck, including:
starting the constant-speed cruising of the heavy truck;
determining a constant-speed cruising target speed;
calculating an engine target torque according to the constant-speed cruise target speed and the current speed;
and if the compensation condition is met, performing acceleration control compensation.
As a possible implementation manner of this embodiment, the process of starting the constant-speed cruise of the heavy truck includes:
if the input of the Set + key or the Set-key is received, starting the constant-speed cruising of the heavy truck;
or,
if the Resume key is received, the constant speed cruise of the heavy truck is started.
As one possible implementation manner of this embodiment, the process of determining the constant-speed-cruise target vehicle speed includes:
when the constant-speed cruise of the heavy truck is started through a Set + key or a Set-key, calculating the constant-speed cruise target speed through the key pressing times of the Set + key or the Set-key;
and when the constant-speed cruise of the heavy truck is started through the Resume key, taking the last constant-speed cruise target vehicle speed as the constant-speed cruise target vehicle speed.
As a possible implementation manner of this embodiment, the process of calculating the engine target torque according to the cruise target vehicle speed and the current vehicle speed is as follows:
calculating the speed difference between the constant-speed cruise target speed and the current speed, and determining the target acceleration according to the corresponding relation between the preset speed difference and the acceleration;
and calculating the target torque of the engine according to the target acceleration and the running resistance of the heavy truck.
As a possible implementation of this embodiment, the driving resistance of the heavy truck is determined by the current acceleration, the current engine torque and the overall vehicle weight, and the transmission ratio of the engine.
As a possible implementation manner of this embodiment, the compensation condition is that the difference between the target acceleration and the current acceleration exceeds a set threshold range.
As a possible implementation manner of this embodiment, the process of performing acceleration control compensation includes:
calculating an engine torque compensation value according to the difference value between the target acceleration and the current acceleration and the running resistance of the heavy truck;
and superposing the engine torque compensation value and the engine target torque to obtain the engine cruising expected torque.
As a possible implementation manner of this embodiment, the difference between the target acceleration and the current acceleration exceeds a set threshold range, specifically:
the absolute value of the difference is greater than the upper threshold of the set threshold range, or the absolute value of the difference is less than the lower threshold of the set threshold range. When the absolute value of the difference is greater than the lower threshold and less than the upper threshold, no acceleration control compensation is performed.
In another aspect, an embodiment of the present invention provides a system for controlling constant-speed cruise of a heavy truck, including: the constant-speed cruise starting module is used for starting the constant-speed cruise of the heavy truck;
the target vehicle speed determining module is used for determining a constant-speed cruising target vehicle speed;
the target torque calculation module is used for calculating the target torque of the engine according to the constant-speed cruise target speed and the current speed;
and the compensation module is used for performing acceleration control compensation if the compensation condition is met.
As a possible implementation manner of this embodiment, the constant-speed cruise starting module includes:
the acceleration and deceleration cruise starting module is used for starting the constant-speed cruise of the heavy truck if the input of a Set + key or a Set-key is received;
and the constant-speed cruise starting module is recovered, and if the input of the Resume key is received, the constant-speed cruise of the heavy truck is started.
As a possible implementation manner of this embodiment, when the constant-speed cruise of the heavy truck is started through the Set + key or the Set-key, the target vehicle speed determination module calculates the constant-speed cruise target vehicle speed through the number of times of pressing the Set + key or the Set-key; when the cruise control of the heavy truck is started through the Resume key, the target vehicle speed determination module takes the last cruise control target vehicle speed as the cruise control target vehicle speed.
As one possible implementation manner of the embodiment, the target torque calculation module includes:
the target acceleration determining module is used for calculating the speed difference between the constant-speed cruise target vehicle speed and the current vehicle speed and determining the target acceleration according to the preset corresponding relation between the speed difference and the acceleration;
and the target torque calculation module is used for calculating the target torque of the engine according to the target acceleration and the running resistance of the heavy truck.
As a possible implementation of this embodiment, the driving resistance of the heavy truck is determined by the current acceleration, the current engine torque and the overall vehicle weight, and the transmission ratio of the engine.
As a possible implementation manner of this embodiment, the compensation condition is that the difference between the target acceleration and the current acceleration exceeds a set threshold range.
As a possible implementation manner of this embodiment, the compensation module includes:
the compensation value calculation module is used for calculating an engine torque compensation value according to the difference value between the target acceleration and the current acceleration and the running resistance of the heavy truck;
the cruise expected torque module is used for superposing the engine torque compensation value and the engine target torque to obtain the engine cruise expected torque.
As a possible implementation manner of this embodiment, the difference between the target acceleration and the current acceleration exceeds a set threshold range, specifically:
the absolute value of the difference is greater than the upper threshold of the set threshold range, or the absolute value of the difference is less than the lower threshold of the set threshold range. When the absolute value of the difference is greater than the lower threshold and less than the upper threshold, no acceleration control compensation is performed.
The technical scheme of the embodiment of the invention has the following beneficial effects:
the method for controlling the constant-speed cruise of the heavy truck in the technical scheme of the embodiment of the invention comprises the following steps: starting the constant-speed cruising of the heavy truck; determining a constant-speed cruising target speed; calculating an engine target torque according to the constant-speed cruise target speed and the current speed; and if the compensation condition is met, performing acceleration control compensation. The invention realizes the accurate control of the vehicle speed within the range of 10km/h to 110km/h, and simultaneously prevents the problems of poor comfort and increased oil consumption caused by overlarge vehicle acceleration.
The invention improves the performance of the constant-speed cruising system of the heavy-duty automobile, ensures that the speed control during cruising is more accurate, the acceleration of the automobile is smoother, and the comfort is improved; the applicable working conditions of the constant-speed cruise system are increased, and a good control effect can be still obtained at a low speed; the method does not need to add an additional device to the whole vehicle, can be realized only by improving the control logic of the whole vehicle, and is widely applicable.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Description of the drawings:
FIG. 1 is a flowchart illustrating a method for constant speed cruise control of a heavy truck, according to an exemplary embodiment;
FIG. 2 is a block diagram of a system for constant speed cruise control of a heavy truck according to an exemplary embodiment;
FIG. 3 is a control flow chart of the present invention for constant-speed cruising of a heavy vehicle.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
FIG. 1 is a flow chart illustrating a method for constant speed cruise control of a heavy truck according to an exemplary embodiment. As shown in fig. 1, an embodiment of the present invention provides a method for controlling a constant-speed cruise of a heavy truck, including:
starting the constant-speed cruising of the heavy truck;
determining a constant-speed cruising target speed;
calculating an engine target torque according to the constant-speed cruise target speed and the current speed;
and if the compensation condition is met, performing acceleration control compensation.
As a possible implementation manner of this embodiment, the process of starting the constant-speed cruise of the heavy truck includes:
if the input of the Set + key or the Set-key is received, starting the constant-speed cruising of the heavy truck;
or,
if the Resume key is received, the constant speed cruise of the heavy truck is started.
As one possible implementation manner of this embodiment, the process of determining the constant-speed-cruise target vehicle speed includes:
when the constant-speed cruise of the heavy truck is started through a Set + key or a Set-key, calculating the constant-speed cruise target speed through the key pressing times of the Set + key or the Set-key;
and when the constant-speed cruise of the heavy truck is started through the Resume key, taking the last constant-speed cruise target vehicle speed as the constant-speed cruise target vehicle speed.
As a possible implementation manner of this embodiment, the process of calculating the engine target torque according to the cruise target vehicle speed and the current vehicle speed is as follows:
calculating the speed difference between the constant-speed cruise target speed and the current speed, and determining the target acceleration according to the corresponding relation between the preset speed difference and the acceleration;
and calculating the target torque of the engine according to the target acceleration and the running resistance of the heavy truck.
As a possible implementation of this embodiment, the driving resistance of the heavy truck is determined by the current acceleration, the current engine torque and the overall vehicle weight, and the transmission ratio of the engine.
As a possible implementation manner of this embodiment, the compensation condition is that the difference between the target acceleration and the current acceleration exceeds a set threshold range.
As a possible implementation manner of this embodiment, the process of performing acceleration control compensation includes:
calculating an engine torque compensation value according to the difference value between the target acceleration and the current acceleration and the running resistance of the heavy truck;
and superposing the engine torque compensation value and the engine target torque to obtain the engine cruising expected torque.
As a possible implementation manner of this embodiment, the difference between the target acceleration and the current acceleration exceeds a set threshold range, specifically:
the absolute value of the difference is greater than the upper threshold of the set threshold range, or the absolute value of the difference is less than the lower threshold of the set threshold range. When the absolute value of the difference is greater than the lower threshold and less than the upper threshold, no acceleration control compensation is performed.
In the embodiment, when the Set +, Set-and Resume cruise keys are operated, the actually input target vehicle speed is limited to be always within a range of plus or minus a certain threshold value of the current vehicle speed, so that the condition that the deviation between the target vehicle speed and the current vehicle speed is overlarge to cause overlarge acceleration is prevented.
The present embodiment adds acceleration control compensation on the basis of speed control. When the conditions are met, the acceleration control is acted, the output control quantity is superposed with the control quantity of the speed control, the overshoot can be controlled in a small range, and the problem of overlarge acceleration in the vehicle speed adjusting process is solved.
The embodiment enables the use of near-optimal control parameters in a speed range from 10km/h to 110km/h based on the target speed, and improves the control precision.
The embodiment improves the performance of the constant-speed cruising system of the heavy-duty automobile, ensures that the speed control during cruising is more accurate, the acceleration of the automobile is smoother, and the comfort is improved; the applicable working conditions of the constant-speed cruise system are increased, and a good control effect can be still obtained at a low speed; the method does not need to add an additional device to the whole vehicle, can be realized only by improving the control logic of the whole vehicle, and is widely applicable.
FIG. 2 is a block diagram of a system for constant speed cruise control of a heavy truck according to an exemplary embodiment. As shown in fig. 2, an embodiment of the present invention provides a system for controlling constant-speed cruise of a heavy truck, including:
the constant-speed cruise starting module is used for starting the constant-speed cruise of the heavy truck;
the target vehicle speed determining module is used for determining a constant-speed cruising target vehicle speed;
the target torque calculation module is used for calculating the target torque of the engine according to the constant-speed cruise target speed and the current speed;
and the compensation module is used for performing acceleration control compensation if the compensation condition is met.
As a possible implementation manner of this embodiment, the constant-speed cruise starting module includes:
the acceleration and deceleration cruise starting module is used for starting the constant-speed cruise of the heavy truck if the input of a Set + key or a Set-key is received;
and the constant-speed cruise starting module is recovered, and if the input of the Resume key is received, the constant-speed cruise of the heavy truck is started.
As a possible implementation manner of this embodiment, when the constant-speed cruise of the heavy truck is started through the Set + key or the Set-key, the target vehicle speed determination module calculates the constant-speed cruise target vehicle speed through the number of times of pressing the Set + key or the Set-key; when the cruise control of the heavy truck is started through the Resume key, the target vehicle speed determination module takes the last cruise control target vehicle speed as the cruise control target vehicle speed.
As one possible implementation manner of the embodiment, the target torque calculation module includes:
the target acceleration determining module is used for calculating the speed difference between the constant-speed cruise target vehicle speed and the current vehicle speed and determining the target acceleration according to the preset corresponding relation between the speed difference and the acceleration;
and the target torque calculation module is used for calculating the target torque of the engine according to the target acceleration and the running resistance of the heavy truck.
As a possible implementation of this embodiment, the driving resistance of the heavy truck is determined by the current acceleration, the current engine torque and the overall vehicle weight, and the transmission ratio of the engine.
As a possible implementation manner of this embodiment, the compensation condition is that the difference between the target acceleration and the current acceleration exceeds a set threshold range.
As a possible implementation manner of this embodiment, the compensation module includes:
the compensation value calculation module is used for calculating an engine torque compensation value according to the difference value between the target acceleration and the current acceleration and the running resistance of the heavy truck;
the cruise expected torque module is used for superposing the engine torque compensation value and the engine target torque to obtain the engine cruise expected torque.
As a possible implementation manner of this embodiment, the difference between the target acceleration and the current acceleration exceeds a set threshold range, specifically:
the absolute value of the difference is greater than the upper threshold of the set threshold range, or the absolute value of the difference is less than the lower threshold of the set threshold range. When the absolute value of the difference is greater than the lower threshold and less than the upper threshold, no acceleration control compensation is performed.
FIG. 3 is a control flow chart of the present invention for constant-speed cruising of a heavy vehicle. The system of the invention is connected with a cruise controller of a heavy-duty car in an abutting mode, and as shown in fig. 3, the constant-speed cruise of the heavy-duty car is implemented as follows.
When the driver presses the Set +, Set-or Res key, the cruise function is activated if the cruise activation condition is satisfied.
S1, if a driver activates a cruise function by pressing Set + or Set-, entering a vehicle speed holding state, keeping the vehicle running at the current vehicle speed, continuously operating a cruise key by the driver in a point-pressing or long-pressing mode (the key pressing time is less than or equal to a certain threshold value and is regarded as the point-pressing, and the key pressing time is more than the threshold value and is regarded as the long-pressing), and calculating the target vehicle speed output to a cruise controller by a system according to the operation mode of the driver; if the driver activates the cruise function by pressing the Res key, the cruise control system enters a recovery state, and the system calculates the target speed output to the cruise controller according to the memorized target speed when the cruise is stopped last time. In the process, the target vehicle speed calculated by the system and output to the cruise controller is limited within the range of the current vehicle speed plus or minus a certain threshold value.
And S2, a speed control module in the cruise controller takes the difference value between the cruise target speed and the current speed as input, obtains the pre-calibrated optimal control parameter under the speed according to the cruise target speed, and calculates to obtain the engine torque required by the sampling period.
And S3, when the acceleration control condition is met, calculating required engine torque compensation, and superposing the required engine torque compensation with the output of the speed control module to obtain the expected engine torque. The acceleration is processed redundantly, and when the vehicle is not provided with an acceleration sensor, the system can calculate the current acceleration according to the current vehicle speed.
When the driver operates the cruise key, the set speed limit value is always based on the current speed, so that the situation that the deviation between the target speed and the current speed is overlarge, the influence of overlarge acceleration on comfortableness is avoided, and the potential safety hazard caused by misoperation of the driver is avoided.
The invention adopts a control method of conditionally increasing the compensation of the control quantity, rather than single speed control, effectively prevents the problem of overshoot in the adjusting process, obviously improves the driving experience, and can reduce the oil consumption to a certain extent.
The invention adopts a variable parameter control mode, overcomes the defect that a good control effect can not be obtained in a larger speed range when a single control parameter is adopted, realizes the accurate control of the vehicle speed in a speed range of 10km/h to 110km/h, and meets various working conditions.
The invention can realize related functions only by the most basic vehicle signals, can be suitable for heavy-duty vehicles of different vehicle types by simple calibration, and has great practical significance.
The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.
Claims (10)
1. A method for controlling constant-speed cruise of a heavy truck is characterized by comprising the following steps:
starting the constant-speed cruising of the heavy truck;
determining a constant-speed cruising target speed;
calculating an engine target torque according to the constant-speed cruise target speed and the current speed;
and if the compensation condition is met, performing acceleration control compensation.
2. The method for constant-speed cruise control of a heavy truck according to claim 1, wherein said process of initiating constant-speed cruise of a heavy truck comprises:
if the input of the Set + key or the Set-key is received, starting the constant-speed cruising of the heavy truck;
or,
if the Resume key is received, the constant speed cruise of the heavy truck is started.
3. The method for constant-speed cruise control of a heavy truck according to claim 2, wherein said process of determining a constant-speed cruise target vehicle speed comprises:
when the constant-speed cruise of the heavy truck is started through a Set + key or a Set-key, calculating the constant-speed cruise target speed through the key pressing times of the Set + key or the Set-key;
and when the constant-speed cruise of the heavy truck is started through the Resume key, taking the last constant-speed cruise target vehicle speed as the constant-speed cruise target vehicle speed.
4. The method for cruise control of a heavy truck according to claim 3, wherein said calculating the target torque of the engine based on the cruise target speed and the current speed comprises:
calculating the speed difference between the constant-speed cruise target speed and the current speed, and determining the target acceleration according to the corresponding relation between the preset speed difference and the acceleration;
and calculating the target torque of the engine according to the target acceleration and the running resistance of the heavy truck.
5. The method for cruise control of a heavy truck according to claim 4, wherein said compensation condition is that the difference between the target acceleration and the current acceleration is outside a set threshold range.
6. The method for constant-speed cruise control of a heavy truck according to claim 5, wherein said acceleration control compensation is performed by:
calculating an engine torque compensation value according to the difference value between the target acceleration and the current acceleration and the running resistance of the heavy truck;
and superposing the engine torque compensation value and the engine target torque to obtain the engine cruising expected torque.
7. A system for constant-speed cruise control of a heavy truck is characterized by comprising the following components:
the constant-speed cruise starting module is used for starting the constant-speed cruise of the heavy truck;
the target vehicle speed determining module is used for determining a constant-speed cruising target vehicle speed;
the target torque calculation module is used for calculating the target torque of the engine according to the constant-speed cruise target speed and the current speed;
and the compensation module is used for performing acceleration control compensation if the compensation condition is met.
8. The system for constant speed cruise control of a heavy truck according to claim 7, wherein said constant speed cruise initiation module comprises:
the acceleration and deceleration cruise starting module is used for starting the constant-speed cruise of the heavy truck if the input of a Set + key or a Set-key is received;
and the constant-speed cruise starting module is recovered, and if the input of the Resume key is received, the constant-speed cruise of the heavy truck is started.
9. The method for cruise control of a heavy truck according to claim 7, wherein said target torque calculation module comprises:
the target acceleration determining module is used for calculating the speed difference between the constant-speed cruise target vehicle speed and the current vehicle speed and determining the target acceleration according to the preset corresponding relation between the speed difference and the acceleration;
and the target torque calculation module is used for calculating the target torque of the engine according to the target acceleration and the running resistance of the heavy truck.
The driving resistance of a heavy truck is determined by the current acceleration, the current engine torque and the overall vehicle weight and the transmission ratio of the engine.
10. The system for constant speed cruise control of a heavy truck according to claim 9, wherein said compensation module comprises:
the compensation value calculation module is used for calculating an engine torque compensation value according to the difference value between the target acceleration and the current acceleration and the running resistance of the heavy truck;
the cruise expected torque module is used for superposing the engine torque compensation value and the engine target torque to obtain the engine cruise expected torque.
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| CN202010127031.9A CN111284475A (en) | 2020-02-27 | 2020-02-27 | Method and system for constant-speed cruise control of heavy truck |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111891126A (en) * | 2020-08-12 | 2020-11-06 | 中国重汽集团济南动力有限公司 | Vehicle speed control method and device |
| CN112339755A (en) * | 2020-10-30 | 2021-02-09 | 北京六十六号互动科技有限公司 | Method and device for controlling vehicle cruise at constant speed, electric scooter and storage medium |
| CN112389429A (en) * | 2020-10-23 | 2021-02-23 | 上汽通用五菱汽车股份有限公司 | Adaptive cruise control method, adaptive cruise system, vehicle, and storage medium |
| CN112721654A (en) * | 2021-01-20 | 2021-04-30 | 中通客车股份有限公司 | Electric motor coach constant-speed cruise control method and system |
| CN114572209A (en) * | 2022-03-23 | 2022-06-03 | 潍柴动力股份有限公司 | Vehicle cruise control method and system |
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