CN113309624B - Engine speed control method and device for vehicle - Google Patents
Engine speed control method and device for vehicle Download PDFInfo
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- CN113309624B CN113309624B CN202110672859.7A CN202110672859A CN113309624B CN 113309624 B CN113309624 B CN 113309624B CN 202110672859 A CN202110672859 A CN 202110672859A CN 113309624 B CN113309624 B CN 113309624B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The application provides a method and a device for controlling the engine speed of a vehicle, and relates to the technical field of vehicles, wherein the method comprises the following steps: if the engine of the target vehicle meets the driving regeneration condition and the target vehicle is in a waiting operation state under the operation working condition, determining a first regeneration idle speed corresponding to the environmental temperature of the engine based on a preset corresponding relation between the environmental temperature and the first regeneration idle speed; adjusting the rotational speed of the engine to a first regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature corresponding to the first regeneration idle speed reaches the temperature required by the running regeneration, and the oil consumption is in a preset oil consumption range, so that the running regeneration efficiency and the regeneration oil consumption can be considered.
Description
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a method and an apparatus for controlling an engine speed of a vehicle.
Background
The crane mainly carries out hoisting operation, and diesel particulate filter (Diesel Particulate Filter, DPF) is required to be passively regenerated during the hoisting operation, namely carbon particles in the DPF respectively react with O2 or NO and NO2 in engine waste gas at different temperatures, so that the carbon particles in the DPF are eliminated. When the crane is in hoisting operation, the engine runs under low load, so that the exhaust temperature of the engine is lower than the passive regeneration temperature of the DPF, and the crane needs to carry out parking regeneration, thereby causing the problems of short interval of the parking regeneration period and the like.
Aiming at the problems, the crane is additionally provided with a traveling crane regeneration function under the hoisting working condition. Specifically, the crane lifting working condition traveling regeneration function is realized by lifting the rotating speed of the engine, increasing the heat management measure to lift the temperature discharge and the like, and the interval of the parking regeneration period of the crane is prolonged.
However, the crane has the following problems in the crane running regeneration function under the hoisting condition: (1) When the whole vehicle does not have hoisting action, the output torque of the engine is low, the upstream temperature of an oxidation catalyst (DOC) of the DPF can not reach the fuel oil ignition temperature, the engine is in a regeneration heating stage for a long time, and the engine can not quickly raise the DPF temperature to the running regeneration temperature. (2) If the crane hoisting working condition is that the crane regeneration idling speed is set to a higher value, the engine can rapidly raise the DPF temperature to eliminate carbon deposition, but the problem of high oil consumption exists when the hoisting load is large.
Therefore, the existing crane cannot give consideration to the problems of running regeneration efficiency and regeneration oil consumption under the hoisting working condition.
Disclosure of Invention
The application provides a method and a device for controlling the engine speed of a vehicle, which are used for solving the problems of running regeneration efficiency and regeneration oil consumption of the vehicle under the working condition.
The specific technical scheme provided by the embodiment of the application is as follows:
in a first aspect, an embodiment of the present application provides a method for controlling an engine speed of a vehicle, including:
if the engine of the target vehicle meets driving regeneration conditions and the target vehicle is in a waiting operation state under an operation working condition, determining a first regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature and the first regeneration idle speed;
adjusting a rotational speed of the engine to the first regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding first regeneration idle speed reaches the temperature required by the running regeneration, and the oil consumption is in a preset oil consumption range.
In some exemplary embodiments, the method further comprises:
if the engine meets the driving regeneration condition and the target vehicle is in an operation state under the operation working condition, determining a second regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature of the engine and the second regeneration idle speed;
adjusting the rotational speed of the engine to the second regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding second regeneration idle speed reaches the temperature required by the running regeneration, the oil consumption is in the preset oil consumption range, and the second regeneration idle speed is smaller than the first regeneration idle speed.
In some exemplary embodiments, the job status and waiting job status of the target vehicle are determined by:
if the output torque of the engine is not greater than the output torque threshold, the target vehicle is in a waiting operation state; or alternatively
And if the output torque of the engine is larger than the output torque threshold value, the target vehicle is in a working state.
In some exemplary embodiments, after the adjusting the rotational speed of the engine to the first regenerative idle speed, the method further includes:
if the target vehicle is changed from a waiting operation state to an operation state, adjusting the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed; or alternatively
After the rotational speed of the engine is adjusted to the second regeneration idle speed, the method further comprises:
and if the target vehicle is changed from the working state to the waiting working state, adjusting the rotating speed of the engine from the second regeneration idle speed to the first regeneration idle speed.
In some exemplary embodiments, the method further comprises:
if the output torque of the engine is increased from not more than the output torque threshold value to more than the output torque threshold value, and the output torque is continuously more than the output torque threshold value within a first set period of time, determining that the target vehicle is changed from a waiting operation state to an operation state; or alternatively
And if the output torque of the engine is reduced from being greater than an output torque threshold value to not greater than the output torque threshold value, and the output torque is continuously not greater than the output torque threshold value within a second set period of time, determining that the target vehicle is changed from a working state to a waiting working state.
In some exemplary embodiments, the adjusting the rotational speed of the engine from the first regenerative idle speed to the second regenerative idle speed includes:
gradually reducing the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed according to a first step size; or alternatively
The adjusting the rotational speed of the engine from the second regenerative idle speed to the first regenerative idle speed includes:
and gradually increasing the rotating speed of the engine from the second regeneration idle speed to the first regeneration idle speed according to a second step size.
In a second aspect, an embodiment of the present application provides an engine speed control device of a vehicle, including:
the first determining module is used for determining a first regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature and the first regeneration idle speed if the engine of the target vehicle meets the running regeneration condition and the target vehicle is in a waiting operation state under the operation working condition;
a first adjustment module for adjusting a rotational speed of the engine to the first regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding first regeneration idle speed reaches the temperature required by the running regeneration, and the oil consumption is in a preset oil consumption range.
In some exemplary embodiments, the apparatus further comprises:
the second determining module is used for determining a second regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature of the engine and the second regeneration idle speed if the engine meets the driving regeneration condition and the target vehicle is in the working state under the working condition;
a second adjustment module for adjusting a rotational speed of the engine to the second regeneration idle; the engine is at the ambient temperature, the exhaust temperature at the corresponding second regeneration idle speed reaches the temperature required by the running regeneration, the oil consumption is in the preset oil consumption range, and the second regeneration idle speed is smaller than the first regeneration idle speed.
In some exemplary embodiments, the apparatus further comprises a first status determination module for determining a job status and a waiting job status of the target vehicle by:
if the output torque of the engine is not greater than the output torque threshold, the target vehicle is in a waiting operation state; or alternatively
And if the output torque of the engine is larger than the output torque threshold value, the target vehicle is in a working state.
In some exemplary embodiments, the first adjustment module is further configured to:
after the rotation speed of the engine is adjusted to the first regeneration idle speed, if the target vehicle is changed from a waiting operation state to an operation state, the rotation speed of the engine is adjusted from the first regeneration idle speed to the second regeneration idle speed; or alternatively
The second adjusting module is further configured to:
after the rotational speed of the engine is adjusted to the second regenerative idle speed, if the target vehicle is changed from a working state to a waiting working state, the rotational speed of the engine is adjusted from the second regenerative idle speed to the first regenerative idle speed.
In some exemplary embodiments, the apparatus further comprises a second state determination module for:
if the output torque of the engine is increased from not more than the output torque threshold value to more than the output torque threshold value, and the output torque is continuously more than the output torque threshold value within a first set period of time, determining that the target vehicle is changed from a waiting operation state to an operation state; or alternatively
And if the output torque of the engine is reduced from being greater than an output torque threshold value to not greater than the output torque threshold value, and the output torque is continuously not greater than the output torque threshold value within a second set period of time, determining that the target vehicle is changed from a working state to a waiting working state.
In some exemplary embodiments, the first adjustment module is further configured to:
gradually reducing the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed according to a first step size; or alternatively
The second adjusting module is further configured to:
and gradually increasing the rotating speed of the engine from the second regeneration idle speed to the first regeneration idle speed according to a second step size.
In a third aspect, embodiments of the present application provide a control device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, which when executed by the processor causes the processor to implement the method of any of the first aspects.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having a computer program stored therein, which when executed by a processor, implements the method of any of the first aspects.
The engine speed control method of the vehicle has the following advantages:
and presetting a corresponding relation between the ambient temperature of the engine and the first regeneration idle speed of the target vehicle in a waiting operation state of an operation working condition, wherein the exhaust temperature of the engine can reach the temperature required by running regeneration under the first regeneration idle speed corresponding to a certain ambient temperature, and the oil consumption is in a preset oil consumption range. In practical application, when the engine of the target vehicle meets the driving regeneration condition, if the target vehicle is judged to be in a waiting operation state under the operation working condition, based on the corresponding relation, determining a first regeneration idle speed corresponding to the environment temperature of the engine, and then adjusting the rotating speed of the engine to the first regeneration idle speed, so that the exhaust temperature of the engine can reach the temperature required for driving regeneration, and the oil consumption is in a preset oil consumption range. Therefore, the scheme of the application can give consideration to the running regeneration efficiency and the regeneration oil consumption.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling engine speed of a vehicle provided in an embodiment of the present application;
FIG. 2 is a flow chart of another engine speed control method for a vehicle provided in an embodiment of the present application;
FIG. 3 is a graph of rotational speed and output torque provided in an embodiment of the present application;
fig. 4 is a block diagram of an engine speed control device of a vehicle according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a control device according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The existing crane cannot give consideration to the problems of running regeneration efficiency and regeneration oil consumption under the hoisting working condition. In view of this, the embodiments of the present application provide a method and an apparatus for controlling an engine speed of a vehicle, if it is determined that an engine of a target vehicle meets a driving regeneration condition and the target vehicle is in a waiting operation state under an operation condition, determining a first regeneration idle speed corresponding to an ambient temperature where the engine is located based on a correspondence between the ambient temperature and the first regeneration idle speed, and then adjusting the engine speed to the first regeneration idle speed, so that an exhaust temperature of the engine can reach a temperature required for driving regeneration and fuel consumption is in a preset fuel consumption range. Therefore, the scheme of the application can give consideration to the running regeneration efficiency and the regeneration oil consumption.
The engine speed control method of the vehicle of the present application will be described in detail with reference to the accompanying drawings and specific embodiments.
In the embodiment of the application, the engine speed control method of the vehicle may be performed by a control device on the vehicle, such as an electronic control unit (Electronic Control Unit, ECU) of the engine, or the like; the vehicle includes, but is not limited to, a crane, such as an automobile crane, a crawler crane, a tire crane, etc., without limitation.
Fig. 1 shows a flowchart of a method for controlling an engine speed of a vehicle according to an embodiment of the present application. Referring to fig. 1, the engine speed control method of the vehicle includes the steps of:
step S101, if the engine of the target vehicle meets the driving regeneration condition and the target vehicle is in a waiting operation state under the operation condition, determining a first regeneration idle speed corresponding to the environmental temperature where the engine is located based on the corresponding relationship between the environmental temperature and the first regeneration idle speed.
The target vehicle takes a crane as an example, the working condition of the crane is hoisting operation, the waiting operation state of the hoisting operation can be no hoisting operation, for example, the crane does not hoist a heavy object, or the hoisting heavy object hovers in the air, and the like, and at the moment, the engine has no additional load; the hoisting operation may be in a hoisting operation in which case the engine has an additional load.
In step S101, when the carbon load of the DPF of the target vehicle reaches the set value, it may be determined that the engine of the target vehicle satisfies the driving regeneration condition, and the driving regeneration function needs to be started.
In some possible embodiments, the operating state of the target vehicle may be determined by:
and acquiring the output torque of the engine, and if the output torque of the engine is not greater than the output torque threshold value, enabling the target vehicle to be in a waiting operation state.
Wherein the output torque threshold may be set according to the actual condition of the target vehicle engine.
Further, the operation state of the target vehicle may be determined by:
if the output torque of the engine is greater than the output torque threshold, the target vehicle is in an operating state.
In some embodiments, before executing step S101, a correspondence relationship between the ambient temperature and the first regeneration idle speed in the waiting operation state may be preset, where the correspondence relationship may be determined by engine bench calibration, or may be determined by testing the engine on the target vehicle. The following description will take the calibration of the engine bench as an example, and specifically may include the following steps:
(1) Determining a specific ambient temperature K by engine gantry calibration 0 Engine output torque threshold T 0 Output torque is greater than T 0 When the target vehicle is in the working state, the running regeneration idle speed of the working condition is set to be n 1 The method comprises the steps of carrying out a first treatment on the surface of the Output torque is less than or equal to T 0 When the target vehicle is in a waiting operation state, the running regeneration idle speed of the operation working condition is set to be n 2 To determine the optimum value of the rotational speed of the engine at different loads.
(2) Taking into account the effect of ambient temperature on the engine exhaust temperature, e.g. ambient temperature K n Taking the target vehicle as an example in the working state, when K 1 ≤K n ＜K 0 When the operation working condition is running, the regeneration idling speed is on the basisIncrease in nominal rotational speed Δn 1 Obtaining a second regeneration idle speed n 1 +Δn 1 The method comprises the steps of carrying out a first treatment on the surface of the When K is 2 ≤K n ＜K 1 When the operation condition is that the running regeneration idling speed is increased by delta n on the basic calibration rotating speed 2 Obtaining a second regeneration idle speed n 1 +Δn 2 Sequentially determining corresponding delta n of corresponding temperature 3 、Δn 4 And so on, obtaining a corresponding second regeneration idle speed n 1 +Δn 3 、n 1 +Δn 4 ……。
It should be noted that when the ambient temperature is smaller than the ambient temperature K at the time of calibration 0 The second regenerative idle speed may be at n 1 On the basis of (a), delta n is increased x X=1, 2, 3, 4 … …; and when the ambient temperature is greater than the calibrated ambient temperature K 0 The second regenerative idle speed may be at n 1 On the basis of (a), delta n is reduced x And will not be described in detail herein.
When the target vehicle is in an operating state, the rotating speed of the engine is adjusted to a corresponding second regeneration idle speed at a certain ambient temperature, so that the exhaust temperature of the engine can reach the temperature required by running regeneration, the oil consumption is in a preset oil consumption range, and the preset oil consumption range can float above and below the economic minimum oil consumption, for example, the oil consumption reaches or approaches to the economic minimum oil consumption; the economic minimum fuel consumption is the minimum fuel consumption for enabling the exhaust temperature of the engine to reach the temperature required by driving regeneration.
When the target vehicle is in the waiting state, determining the first regeneration idle speed corresponding to the corresponding ambient temperature may refer to the step (2), which is not described herein.
In this way, according to the relation between the output torque and the output torque threshold T0, it can be determined whether the target vehicle is in the working state or in the waiting working state, and further the corresponding relation between the ambient temperature and the first regeneration idle speed in the waiting working state and the corresponding relation between the ambient temperature and the second regeneration idle speed in the working state are obtained.
Step S102, adjusting the rotation speed of an engine to be a first regeneration idle speed; the engine is at the above-mentioned ambient temperature, and the exhaust temperature under the corresponding first idle speed of regeneration reaches the temperature that the driving regeneration needs, and the oil consumption is in the preset oil consumption scope.
The preset oil consumption range may be the preset oil consumption range, that is, the oil consumption range floats above and below the economic minimum oil consumption, for example, the economic minimum oil consumption is h, and the preset oil consumption range is [ h- Δh, h+Δh ].
Fig. 2 shows a flowchart of another engine speed control method of a vehicle according to an embodiment of the present application. Referring to fig. 2, the engine speed control method of the vehicle includes the steps of:
step S200, if the engine meets the running regeneration condition, judging whether the target vehicle is in a waiting operation state or an operation state under the operation working condition; executing step S201-step S202 if the job waiting state is established; step S203 to step S204 are performed if in the job state.
In step S201, a first regeneration idle speed corresponding to the ambient temperature at which the engine is located is determined based on the correspondence between the ambient temperature at which the engine is located and the first regeneration idle speed.
Step S202, adjusting the rotation speed of an engine to a first regeneration idle speed; the engine is at the above-mentioned ambient temperature, and the exhaust temperature under the corresponding first idle speed of regeneration reaches the temperature that the driving regeneration needs, and the oil consumption is in the preset oil consumption scope.
Step S203, determining the second regeneration idle speed corresponding to the ambient temperature where the engine is located based on the correspondence between the ambient temperature where the engine is located and the second regeneration idle speed.
Step S204, the rotating speed of the engine is adjusted to be a second regeneration idle speed; the engine is at the above-mentioned ambient temperature, and the exhaust temperature under the corresponding second regeneration idle speed reaches the temperature required by the driving regeneration, and the oil consumption is in the preset oil consumption range, and the second regeneration idle speed is smaller than the first regeneration idle speed.
The determining manner of the corresponding relationship between the ambient temperature and the second regeneration idle speed in the operation state is similar to the determining manner of the corresponding relationship between the ambient temperature and the first regeneration idle speed in the waiting operation state in the step S203-step S204, which is similar to the embodiment of the step S101-step S102, and is not repeated here.
Factors affecting the temperature required for the regeneration of the vehicle include the regeneration idle speed and the engine load. When the target vehicle is in an operating state under an operating condition, the engine has extra load; when the target vehicle is in a waiting working state under the working condition, no extra load exists on the engine; at the same regeneration idle speed, the exhaust temperature of the engine in the operating state is greater than the exhaust temperature in the waiting operating state. Based on this, in the embodiment of the present application, on the premise of meeting the running regeneration temperature, in order to make the engine oil consumption as small as possible, the second regeneration idle speed in the working state and the first regeneration idle speed in the waiting working state are differentially set, specifically, the second regeneration idle speed is smaller than the first regeneration idle speed at the same environmental temperature.
In some exemplary embodiments, after the rotational speed of the engine is adjusted to the first regeneration idle in the above step S202, the following steps may be further performed:
if the target vehicle is changed from the waiting operation state to the operation state, the rotation speed of the engine is adjusted from the first regeneration idle speed to the second regeneration idle speed.
In a specific implementation, it may be determined whether the target vehicle changes from the waiting job state to the job state, including the steps of:
and if the output torque of the engine is increased from not more than the output torque threshold value to more than the output torque threshold value, and the output torque is continuously more than the output torque threshold value within the first set time period, determining that the target vehicle is changed from the waiting operation state to the operation state.
The first set period of time may be set as required, for example, 5 minutes, 10 minutes, and the like, which is not limited herein.
In some exemplary embodiments, the adjusting the rotation speed of the engine from the first regeneration idle speed to the second regeneration idle speed may include the following steps:
gradually reducing the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed according to the first step size; or alternatively
Similarly, after the rotational speed of the engine is adjusted to the second regeneration idle in the above step S204, the following steps may be further performed:
if the target vehicle is changed from the working state to the waiting working state, the rotation speed of the engine is adjusted from the second regeneration idle speed to the first regeneration idle speed.
In a specific implementation, it may be determined whether the target vehicle is changed from the job state to the waiting job state, including the steps of:
and if the output torque of the engine is reduced from being greater than the output torque threshold value to not greater than the output torque threshold value, and the output torque is continuously not greater than the output torque threshold value within the second set time period, determining that the target vehicle is changed from the working state to the waiting working state.
The second set duration may be set as required, and may be the same as or different from the first set duration.
In some exemplary embodiments, the adjusting the rotation speed of the engine from the second regeneration idle speed to the first regeneration idle speed may include the following steps:
the rotational speed of the engine is stepped up from the second regenerative idle speed to the first regenerative idle speed in a second step.
The engine speed control method of the vehicle according to the embodiment of the present application will be described below with reference to fig. 3.
Illustratively, the target vehicle is exemplified by a crane, and the operating condition is a hoisting condition. As shown in fig. 3, the engine speed control method of the vehicle includes the steps of:
a. when the engine is in lifting working condition and driving regeneration, the ECU carries out driving regeneration according to the real-time torque T x With ambient temperature K x Automatic regulating engine speed n x ＝n 1 +Δn x Or n 2 +Δn x 。
b. Engine output torque T x Reduced to T 0 And below, and output torque is less than or equal to T 0 Time is greater than or equal to t 1 Engine speed n x Lifting to n 2 +Δn x Engine turnSpeed is n 1 +Δn x Lifting to n 2 +Δn x Time reference slope r of (2) 1 。
c. Engine output torque T x Rise to T 0 Above, and the output torque is greater than T 0 Time is greater than or equal to t 2 Engine speed n x Reduced to n 1 +Δn x The engine speed is defined by n 2 +Δn x Reduced to n 1 +Δn x Time reference slope r of (2) 2 。
The crane regeneration under the hoisting working condition is set in an idling differential mode according to the load of the engine, the test effect is as follows, and the test conditions of the whole crane are the same: the whole vehicle waits for and lifts up the movements, the engine rotational speed presumes the same value, because waiting for the course, the upstream temperature of oxidation catalyst DOC of DPF reduces the engine and frequently returns to the regeneration heating stage from the regeneration stage, lift up the working condition and drive and regenerate time long and the oil consumption is high; the whole car waits and the hoist and mount action, engine rotational speed differentiation sets up, because of waiting process, oxidation catalyst ware DOC upstream temperature reduces the engine and returns to the regeneration heating stage from regeneration stage, and whole process appears once, shortens hoist and mount operating mode driving regeneration time, reduces hoist and mount driving regeneration oil consumption. According to the actual test result, the regeneration idling differentiation of the crane in the hoisting working condition of the automobile crane can improve the regeneration efficiency of the crane and reduce the regeneration oil consumption of the crane.
Based on the same inventive concept, the present embodiment provides an engine speed control device for a vehicle, which solves the problem in a similar manner to the method of the above embodiment, so that the implementation of the device may refer to the implementation of the above method, and the repetition is omitted.
Referring to fig. 4, an engine speed control device for a vehicle according to an embodiment of the present application includes a first determining module 41 and a first adjusting module 42.
The first determining module 41 is configured to determine, if the engine of the target vehicle meets the driving regeneration condition and the target vehicle is in a waiting operation state under the operation working condition, a first regeneration idle speed corresponding to an ambient temperature at which the engine is located based on a corresponding relationship between the ambient temperature and the first regeneration idle speed;
a first adjustment module 42 for adjusting a rotational speed of the engine to a first regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding first regeneration idle speed reaches the temperature required by the running regeneration, and the oil consumption is in the preset oil consumption range.
In some exemplary embodiments, the apparatus further comprises:
the second determining module is used for determining a second regeneration idle speed corresponding to the environmental temperature of the engine based on the corresponding relation between the environmental temperature of the engine and the second regeneration idle speed if the engine meets the running regeneration condition and the target vehicle is in an operation state under the operation working condition;
the second adjusting module is used for adjusting the rotating speed of the engine to be a second regeneration idle speed; the engine is at ambient temperature, the exhaust temperature under the corresponding second regeneration idle speed reaches the temperature required by driving regeneration, the oil consumption is in a preset oil consumption range, and the second regeneration idle speed is smaller than the first regeneration idle speed.
In some exemplary embodiments, the apparatus further comprises a first state determination module for determining a job state and a waiting job state of the target vehicle by:
if the output torque of the engine is not greater than the output torque threshold, the target vehicle is in a waiting operation state; or alternatively
If the output torque of the engine is greater than the output torque threshold, the target vehicle is in an operating state.
In some exemplary embodiments, the first adjustment module 42 is further configured to:
after the rotation speed of the engine is adjusted to the first regeneration idle speed, if the target vehicle is changed from a waiting operation state to an operation state, the rotation speed of the engine is adjusted to the second regeneration idle speed from the first regeneration idle speed; or alternatively
The second adjustment module is further used for:
after the rotation speed of the engine is adjusted to the second regeneration idle speed, if the target vehicle is changed from the operation state to the waiting operation state, the rotation speed of the engine is adjusted from the second regeneration idle speed to the first regeneration idle speed.
In some exemplary embodiments, the apparatus further comprises a second state determination module for:
if the output torque of the engine is increased from not more than the output torque threshold to more than the output torque threshold, and the output torque is continuously more than the output torque threshold within a first set period of time, determining that the target vehicle is changed from a waiting operation state to an operation state; or alternatively
And if the output torque of the engine is reduced from being greater than the output torque threshold value to not greater than the output torque threshold value, and the output torque is continuously not greater than the output torque threshold value within the second set time period, determining that the target vehicle is changed from the working state to the waiting working state.
In some exemplary embodiments, the first adjustment module 42 is further configured to:
gradually reducing the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed according to the first step size; or alternatively
The second adjustment module is further used for:
the rotational speed of the engine is stepped up from the second regenerative idle speed to the first regenerative idle speed in a second step.
Corresponding to the method embodiment, the embodiment of the application also provides a control device. The control device may be a control device on the vehicle comprising at least a memory for storing data and a processor for data processing. Among them, for a processor for data processing, when performing processing, a microprocessor, a CPU, a GPU (Graphics Processing Unit, a graphics processing unit), a DSP, or an FPGA may be employed. As for the memory, the memory stores therein operation instructions, which may be computer-executable codes, by which the respective steps in the engine speed control flow of the vehicle of the embodiment of the present application described above are implemented.
Referring to fig. 5, a schematic diagram of a composition structure of a control device according to an embodiment of the present application is shown. The control device may be used to control the motor. In this embodiment, the control device may be structured as shown in fig. 5, including a memory 501 and one or more processors 502.
A memory 501 for storing a computer program for execution by the processor 502. The memory 501 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, a program required for running an instant messaging function, and the like; the storage data area can store various instant messaging information, operation instruction sets and the like.
The memory 501 may be a volatile memory (RAM), such as a random-access memory (RAM); the memory 501 may also be a nonvolatile memory (non-volatile memory), such as a read-only memory (rom), a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); or memory 501, is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. Memory 501 may be a combination of the above.
The processor 502 may include one or more central processing units (central processing unit, CPU) or digital processing units, etc. A processor 502 for implementing the above-described engine speed control method of the vehicle when calling the computer program stored in the memory 501.
The specific connection medium between the memory 501 and the processor 502 is not limited in the embodiments of the present application. The embodiment of the present disclosure is illustrated in fig. 5 by a bus 503 connected between a memory 501 and a processor 502, where the bus 503 is indicated by a thick line in fig. 5, and the connection between other components is merely illustrative and not limited thereto. The bus 503 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 5, but not only one bus or one type of bus.
The memory 501 stores therein a computer storage medium having stored therein computer executable instructions for implementing the engine speed control method of the vehicle of the embodiment of the present application. The processor 502 is configured to execute the engine speed control method of the vehicle described above.
The embodiment of the application also provides a computer storage medium, wherein the computer storage medium is stored with computer executable instructions, and the computer executable instructions are used for realizing the engine speed control method of the vehicle described in any embodiment of the application.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk or an optical disk, or the like, which can store program codes.
Alternatively, the integrated units described in the embodiments of the present application may be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributing to the related art, and the computer software product may be stored in a storage medium, and include several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, ROM, RAM, magnetic or optical disk, or other medium capable of storing program code.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (8)
1. A method of controlling an engine speed of a vehicle, comprising:
if the engine of the target vehicle meets driving regeneration conditions and the target vehicle is in a waiting operation state under an operation working condition, determining a first regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature and the first regeneration idle speed;
adjusting a rotational speed of the engine to the first regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding first regeneration idle speed reaches the temperature required by the running regeneration, and the oil consumption is in a preset oil consumption range;
if the engine meets the driving regeneration condition and the target vehicle is in an operation state under the operation working condition, determining a second regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature of the engine and the second regeneration idle speed;
adjusting the rotational speed of the engine to the second regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding second regeneration idle speed reaches the temperature required by the running regeneration, the oil consumption is in the preset oil consumption range, and the second regeneration idle speed is smaller than the first regeneration idle speed at the same ambient temperature.
2. The method of claim 1, wherein the job status and waiting job status of the target vehicle are determined by:
if the output torque of the engine is not greater than the output torque threshold, the target vehicle is in a waiting operation state; or alternatively
And if the output torque of the engine is larger than the output torque threshold value, the target vehicle is in a working state.
3. The method of claim 1, wherein after said adjusting the rotational speed of the engine to the first regenerated idle speed, further comprising:
if the target vehicle is changed from a waiting operation state to an operation state, adjusting the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed; or alternatively
After the rotational speed of the engine is adjusted to the second regeneration idle speed, the method further comprises:
and if the target vehicle is changed from the working state to the waiting working state, adjusting the rotating speed of the engine from the second regeneration idle speed to the first regeneration idle speed.
4. A method according to claim 3, characterized in that the method further comprises:
if the output torque of the engine is increased from not more than the output torque threshold value to more than the output torque threshold value, and the output torque is continuously more than the output torque threshold value within a first set period of time, determining that the target vehicle is changed from a waiting operation state to an operation state; or alternatively
And if the output torque of the engine is reduced from being greater than an output torque threshold value to not greater than the output torque threshold value, and the output torque is continuously not greater than the output torque threshold value within a second set period of time, determining that the target vehicle is changed from a working state to a waiting working state.
5. The method of claim 3, wherein said adjusting the rotational speed of the engine from the first regenerative idle speed to the second regenerative idle speed comprises:
gradually reducing the rotating speed of the engine from the first regeneration idle speed to the second regeneration idle speed according to a first step size; or alternatively
The adjusting the rotational speed of the engine from the second regenerative idle speed to the first regenerative idle speed includes:
and gradually increasing the rotating speed of the engine from the second regeneration idle speed to the first regeneration idle speed according to a second step size.
6. An engine speed control device of a vehicle, comprising:
the first determining module is used for determining a first regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature and the first regeneration idle speed if the engine of the target vehicle meets the running regeneration condition and the target vehicle is in a waiting operation state under the operation working condition;
a first adjustment module for adjusting a rotational speed of the engine to the first regenerative idle speed; the engine is at the ambient temperature, the exhaust temperature at the corresponding first regeneration idle speed reaches the temperature required by the running regeneration, and the oil consumption is in a preset oil consumption range;
the second determining module is used for determining a second regeneration idle speed corresponding to the environment temperature of the engine based on the corresponding relation between the environment temperature of the engine and the second regeneration idle speed if the engine meets the driving regeneration condition and the target vehicle is in the working state under the working condition;
a second adjustment module for adjusting a rotational speed of the engine to the second regeneration idle; the engine is at the ambient temperature, the exhaust temperature at the corresponding second regeneration idle speed reaches the temperature required by the running regeneration, the oil consumption is in the preset oil consumption range, and the second regeneration idle speed is smaller than the first regeneration idle speed at the same ambient temperature.
7. A control device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, which when executed by the processor causes the processor to implement the method of any of claims 1 to 5.
8. A computer-readable storage medium having a computer program stored therein, characterized in that: the computer program, when executed by a processor, implements the method of any of claims 1-5.
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| CN202110672859.7A CN113309624B (en) | 2021-06-17 | 2021-06-17 | Engine speed control method and device for vehicle |
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| CN202110672859.7A CN113309624B (en) | 2021-06-17 | 2021-06-17 | Engine speed control method and device for vehicle |
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| CN115355098A (en) * | 2022-08-30 | 2022-11-18 | 潍柴动力股份有限公司 | Driving regeneration control method, driving regeneration control device, processor and vehicle |
| CN115324757B (en) * | 2022-09-05 | 2023-11-17 | 潍柴动力股份有限公司 | Control method, control device and electronic control unit for DPF passive regeneration |
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| JP2012137042A (en) * | 2010-12-27 | 2012-07-19 | Iseki & Co Ltd | Working vehicle |
| US9534551B2 (en) * | 2011-09-27 | 2017-01-03 | Kubota Corporation | Working machine |
| JP6405858B2 (en) * | 2014-10-01 | 2018-10-17 | いすゞ自動車株式会社 | DPF regeneration system for vehicles with PTO device |
| CN112081644B (en) * | 2020-09-16 | 2022-05-03 | 奇瑞汽车股份有限公司 | Regeneration method and device of particle catcher |
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