CN116146311A - Engine thermal management control method, device, computer equipment and storage medium - Google Patents

Engine thermal management control method, device, computer equipment and storage medium Download PDF

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Publication number
CN116146311A
CN116146311A CN202211616620.9A CN202211616620A CN116146311A CN 116146311 A CN116146311 A CN 116146311A CN 202211616620 A CN202211616620 A CN 202211616620A CN 116146311 A CN116146311 A CN 116146311A
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China
Prior art keywords
spectrum information
scr
thermal management
information
vehicle
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CN202211616620.9A
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Chinese (zh)
Inventor
郑建业
张龙
孙云龙
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Beijing Foton Cummins Engine Co Ltd
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Beijing Foton Cummins Engine Co Ltd
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Priority to CN202211616620.9A priority Critical patent/CN116146311A/en
Publication of CN116146311A publication Critical patent/CN116146311A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus

Abstract

The invention provides an engine thermal management control method, a device, a computer device and a storage medium, wherein the method comprises the steps of obtaining path information; acquiring current position information of a vehicle; acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information; detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not; and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system. By acquiring real-time path information and current position information of the vehicle, on a road section corresponding to preset road spectrum information, the SCR thermal management control is weakened or exited in advance, the normal combustion and oil injection of the engine are utilized to raise the post-treatment temperature, the time for activating the SCR thermal management mode of the engine is shortened, the duty ratio of the engine in the driving road section is increased, and the energy consumption is effectively reduced on the premise that the emission of NOx in tail gas of the whole vehicle meets the regulation requirement.

Description

Engine thermal management control method, device, computer equipment and storage medium
Technical Field
The present invention relates to the field of vehicle engine management technologies, and in particular, to an engine thermal management control method, an engine thermal management control device, a computer device, and a storage medium.
Background
The exhaust emissions of diesel engines in the automotive field mainly comprise Particulate Matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), sulphur dioxide (SO 2), malodorous gases (formaldehyde) and the like, the CO and HC emissions are relatively low, NOx consists of Nitric Oxide (NO) and nitrogen dioxide (NO 2) in different proportions, and both are toxic gases. The existing diesel engine exhaust emission control mainly aims at PM and NOx, PM is controlled to be generated in a cylinder body through optimizing oil injection and in-cylinder combustion processes, nitrogen oxides formed under the oxygen enrichment condition are treated in an engine aftertreatment system, namely, a urea metering injection device is arranged on an exhaust mixing pipe, urea aqueous solution is injected at a specific temperature, hydrolysis and pyrolysis reaction of the urea aqueous solution occur under the high temperature condition to generate NH3, and the NOx is reduced to N2 and H2O (chemical reaction is as follows) on the surface of a catalyst of an SCR system, so that the technology is a main flow technical route of current trucks.
Urea hydrolysis: (NH) 2 ) 2 CO+H 2 O→2NH 3 +CO 2
NOx reduction: NO+NO 2 +2NH 3 →2N 2 +3H 2 O
NH3 oxidation: 4NH 3 +3O 2 →2N 2 +6H 2 O
The catalyst is the key of the whole SCR (Selective Catalytic Reduction ) system, the vanadium-based catalyst and the copper-based catalyst are commonly used at present, and compared with the copper-based catalyst, the copper-based catalyst has excellent low-temperature (200-250 ℃) performance, the conversion efficiency reaches 84 percent and is obviously influenced by temperature, and the conversion efficiency is obviously higher than that of the vanadium-based catalyst by 40-60 percent at low temperature; the medium temperature region (250-450 ℃) has stable performance, and the conversion efficiency reaches 98%; high temperature area [ ]>450 ℃ higher efficiency reaches 96 percent, thus the temperature is obvious to SCR catalysisThe redox reaction plays a critical role. With the increasing strictness of diesel engine emission regulations, for example NO in national six-fold diesel vehicle regulations GB17691-2018 x The emission requirement of the system is reduced from 2.0g/kwh to 0.46g/kwh in five-stage China, the emission requirement is reduced by 77%, and how to keep the continuous and efficient conversion efficiency of the SCR system becomes a decisive factor in putting the six-stage China into the market.
The engine thermal management control technology is one of the important technical means for improving the power density and the emission characteristics of the engine at present, and is also an important direction for the development of the intelligent engine control technology. The advanced thermal management technology can manage and optimize combustion according to the load of the engine and the post-treatment temperature, such as adding post-injection, utilizing an exhaust throttle valve and the like, so that the engine and the post-treatment are both operated in an optimal temperature range, but the oil consumption in the thermal management mode is slightly higher than that in the normal combustion mode, so that the oil consumption of the vehicle is generally higher, the combustion emission is increased, and the emission of pollutants is unfavorable.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an engine thermal management control method, apparatus, computer device, and storage medium.
An engine thermal management control method comprising:
acquiring path information;
acquiring current position information of a vehicle;
acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
In one embodiment, when the front road spectrum information of the front road section on the vehicle driving path is the preset road spectrum information, the step of exiting the SCR thermal management mode or reducing the power of the SCR system includes:
and when the front road spectrum information is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system before the road section corresponding to the front road spectrum information is driven to a preset distance.
In one embodiment, the preset road spectrum information includes roads having a gradient greater than a preset angle.
In one embodiment, the road having the gradient greater than the preset angle includes:
an uphill road with a gradient greater than a first preset angle; and
downhill roads having a gradient greater than a second preset angle.
In one embodiment, the method further comprises:
and when the front road spectrum information of the front road section on the running path of the vehicle is not the preset road spectrum information, maintaining the current SCR thermal management mode or maintaining the power of the SCR system.
In one embodiment, the method further comprises:
detecting whether the temperature of the post-treatment SCR is less than a preset temperature;
and when the post-treatment SCR systemicity is smaller than the preset temperature, starting the SCR thermal management mode or increasing the power of an SCR system.
An engine thermal management control device comprising:
the path information acquisition module is used for acquiring path information;
the current position information acquisition module is used for acquiring the current position information of the vehicle;
the front road spectrum information acquisition module is used for acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
the system comprises a preset road spectrum information detection module, a preset road spectrum information detection module and a control module, wherein the preset road spectrum information detection module is used for detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and the thermal management mode changing module is used for exiting the SCR thermal management mode or reducing the power of the SCR system when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information.
In one embodiment, the thermal management mode changing module is further configured to exit the SCR thermal management mode or reduce power of the SCR system before traveling a preset distance to a road segment corresponding to the front road spectrum information when the front road spectrum information is the preset road spectrum information.
A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor when executing the computer program performs the steps of:
acquiring path information;
acquiring current position information of a vehicle;
acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
acquiring path information;
acquiring current position information of a vehicle;
acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
According to the engine thermal management control method, the device, the computer equipment and the storage medium, the road spectrum information in front of the vehicle is obtained by obtaining the real-time path information and the current position information of the vehicle, the SCR thermal management control is selectively weakened or exited in advance on the road section corresponding to the preset road spectrum information, the normal combustion and the oil injection of the engine are utilized to raise the post-treatment temperature, compared with the traditional SCR thermal management, the occupation ratio of the time of activating the SCR thermal management mode of the engine in the whole road section can be effectively shortened, and the purpose of improving the fuel consumption of the whole vehicle is achieved by optimizing the SCR thermal management working mode on the premise that the emission of NOx of tail gas of the whole vehicle meets the regulation requirement is ensured.
Drawings
FIG. 1 is a schematic diagram of an application scenario of an engine thermal management control method according to an embodiment;
FIG. 2 is a flow chart of an engine thermal management control method in one embodiment;
FIG. 3 is a block diagram of an engine thermal management control device according to one embodiment;
FIG. 4 is an internal block diagram of a computer device in one embodiment;
FIG. 5 is a flow chart of an engine thermal management control method in one embodiment;
FIG. 6 is a schematic diagram of a road condition of a vehicle traveling in an application scenario in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Example 1
The engine heat management control method provided by the application can be applied to an application environment shown in fig. 1. The vehicle-mounted map device, the gearbox controller and the engine control module ECM (Engine ControlModule ) are connected through the vehicle CAN bus, the vehicle-mounted map device is provided with a GPS module and a GPS antenna, the vehicle-mounted map device obtains GPS satellite signals through the GPS (Global Positioning System ) antenna, so that the position information of a vehicle CAN be obtained, and the vehicle-mounted map device is further provided with a GIS (Geographic Information System ) for providing navigation for the vehicle and providing navigation path information. The engine control module ECM obtains path information;
acquiring current position information of a vehicle; acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information; detecting whether the front road 5 spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not; and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
Example two
In this embodiment, as shown in fig. 2, there is provided an engine thermal management control method, which includes:
step 210, obtaining path information.
In this embodiment, the route information is information of a route traveled by the vehicle, including a route that the vehicle has traveled and a route to be traveled, and may also be referred to as road information, which may be obtained from navigation information of the vehicle.
Step 220, obtaining current location information of the vehicle.
In this step, the current position of the vehicle is obtained in real time, that is, the current position information of the vehicle is obtained, and the vehicle 5 is equipped with a GPS module and a GPS antenna, so that the position information of the vehicle can be obtained in real time. In other embodiments, the vehicle is equipped with a Beidou module, and current position information of the vehicle can be obtained through the Beidou module.
And step 230, acquiring front road spectrum information of a front road section on the vehicle driving path based on the path information and the current position information.
In this embodiment, the travel route is a route corresponding to the route information. And determining a road section to be driven by the vehicle, namely a front road section, according to the current position information of the vehicle and the 0-path information. The road spectrum information not only comprises the coordinate information of the longitude and latitude of the path, but also comprises the road condition information such as the altitude, the gradient and the curvature of the path, and the like, and it is understood that different road spectrum information can influence the running working condition and the engine working condition of the vehicle, so in the embodiment, the road spectrum information which appears in front is acquired according to the current position information of the vehicle, and further the operation of the engine and the SCR system of the vehicle can be accurately controlled.
Step 240, detecting whether the front road spectrum information of the front road section on the vehicle driving path is preset road spectrum information.
In this embodiment, different engine conditions corresponding to different road spectrum information, such as a larger engine load, generate larger heat from the engine, so that the heat of the engine can be used to heat the SCR catalyst and the aftertreatment. Therefore, in the present embodiment, the preset road spectrum information is a road condition that can increase the negative 0 load of the engine or a road condition that stops the engine from discharging exhaust gas. In this embodiment, it is detected whether the road spectrum information of the road section ahead is preset road spectrum information, that is, whether the road condition ahead increases the load of the engine or stops the engine from discharging exhaust gas.
And step 250, when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
SCR thermal management may also be referred to as aftertreatment SCR thermal management. It should be appreciated that in the conventional SCR thermal management mode, exhaust gas generated by combustion of a diesel engine during operation of a vehicle enters the aftertreatment system through the exhaust manifold, and the aftertreatment chemically reacts with the entering exhaust gas under the action of a specific catalyst and temperature, thereby reducing the concentration of a part of harmful gases and enabling various gas indexes of the vehicle finally discharged into the air through the exhaust pipe to meet the regulatory requirements. The aftertreatment SCR thermal management technology enables the engine to keep the aftertreatment at the optimal temperature when working under different working conditions, and maintains higher conversion efficiency.
In this embodiment, when the vehicle is in the SCR thermal management mode or in a state where the SCR thermal management mode is activated, the vehicle heats the exhaust gas by an additionally increased heat source in addition to heating the exhaust gas by the heat of the engine. It should be appreciated that the heating of the vehicle in the SCR thermal management mode belongs to the prior art, and belongs to the technology known to those skilled in the art, and this embodiment is not described in detail.
In this embodiment, when the road spectrum information of the road section in front of the vehicle is the preset road spectrum information, it indicates that the load or load of the engine is increased, and at this time, the heat emitted by the engine is increased, and the heat of the engine can meet the temperature required for exhaust gas treatment, so that the SCR thermal management mode or the weakening thermal management mode is exited based on the detection result of the road spectrum information predicted in advance, and thus, energy consumption can be effectively saved.
In the above embodiment, the real-time path information and the current position information of the vehicle are obtained, so that the road spectrum information in front of the vehicle is obtained, the SCR thermal management control is selectively weakened or exited in advance on the road section corresponding to the preset road spectrum information, and the normal combustion and oil injection of the engine are utilized to raise the post-treatment temperature.
In a thermal management mode of engine aftertreatment, in the normal running process of a vehicle, CAN bus information such as real-time vehicle position, front road gradient and the like provided by vehicle-mounted map equipment is utilized, for example, when the front is predicted to be about to ascend or descend, the thermal management mode is weakened or exited in advance, predictive control is realized, load and working condition change of the engine are utilized to promote aftertreatment temperature discharge, and the fuel economy of the whole vehicle is improved while SCR conversion efficiency is ensured.
In one embodiment, when the front road spectrum information of the front road section on the vehicle driving path is the preset road spectrum information, the step of exiting the SCR thermal management mode or reducing the power of the SCR system includes: and when the front road spectrum information is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system before the road section corresponding to the front road spectrum information is driven to a preset distance.
In this embodiment, before the vehicle travels to the road section corresponding to the front road spectrum information, the SCR thermal management mode is exited in advance or the power of the SCR system is reduced, so that the SCR thermal management mode can be exited in advance or the power of the SCR system can be reduced before the engine of the vehicle enters the working condition with a larger load, and the power consumption can be reduced in advance, so that the energy consumption is further reduced.
In one embodiment, the preset road spectrum information includes roads having a gradient greater than a preset angle. It should be appreciated that in an uphill section of the vehicle, the load on the engine increases, and therefore, the amount of heat emitted by the engine at this time increases accordingly, and the SCR thermal management mode may be exited or the power of the SCR system may be reduced to save energy consumption; when the vehicle is in a downhill road section, compression braking is carried out in the cylinder of the engine, the engine stops injecting fuel, the exhaust valve is closed, harmful gas is not generated by the engine any more, the aftertreatment system stops converting NOx, and the carrier temperature of the SCR catalyst is not required to be raised, so that the exhaust gas is not required to be heated at the moment. Thus, when the grade of the road is greater than a preset angle, either uphill or downhill, the SCR thermal management mode may be exited or the power of the SCR system may be reduced to conserve energy.
In one embodiment, the road having the gradient greater than the preset angle includes: an uphill road with a gradient greater than a first preset angle; and a downhill road having a gradient greater than a second preset angle.
In this embodiment, the angles of the uphill road and the downhill road corresponding to the preset road spectrum information are different, so that the vehicle can reasonably exit the SCR thermal management mode on the uphill road section or the downhill road section with different angles or reduce the power of the SCR system, so as to further save energy consumption.
In one embodiment, the engine thermal management control method further comprises: and when the front road spectrum information of the front road section on the running path of the vehicle is not the preset road spectrum information, maintaining the current SCR thermal management mode or maintaining the power of the SCR system.
In this embodiment, when the front road spectrum information of the front road section is not the preset road spectrum information, it indicates that the road condition of the front road section does not affect the working condition of the engine, so that the current SCR thermal management mode is maintained or the power of the SCR system is maintained, so as to avoid or reduce the emission of exhaust gas.
In one embodiment, the engine thermal management control method further comprises: detecting whether the temperature of the post-treatment SCR is less than a preset temperature; and when the post-treatment SCR systemicity is smaller than the preset temperature, starting the SCR thermal management mode or increasing the power of an SCR system.
In this embodiment, when the post-treatment SCR temperature is less than the preset temperature, it indicates that the exhaust emission treatment may not reach the standard, so that the thermal management control needs to be activated to raise the SCR temperature to improve the conversion efficiency, and the engine starts the SCR thermal management mode or increases the power of the SCR system by increasing fuel injection and optimizing combustion, so as to achieve better exhaust emission treatment.
It should be understood that, although the steps in the flowchart of fig. 2 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
Example III
In this embodiment, the vehicle includes an engine control module ECM, road spectrum information (including vehicle positioning information, road gradient, etc.) transmitted by the on-board map device, and post-processing temperature sensor signals. The system normally works, the vehicle is required to run in a GPS or network signal-good area, so that the vehicle-mounted map device can normally receive road information and the current running road section is recorded in the road spectrum information of the map device.
The common post-treatment heat management control strategy is based on the judgment of the temperature of the post-treatment SCR by the engine control module ECM, and determines whether the engine enters a heat management mode, if so, the temperature of the SCR reaches the optimal working range by changing the fuel injection quantity or optimizing combustion, and the heat management mode is exited after the temperature reaches a set value. In the embodiment, road spectrum information is introduced as one of the basis for determining whether the engine enters a thermal management mode, and the thermal management decision is comprehensively optimized by combining actual driving road information, so that the fuel consumption is reduced.
The vehicle-mounted map equipment is an intelligent mobile terminal developed by a third party for the whole vehicle, is usually composed of a hardware installed in a cab of the whole vehicle and a GPS antenna, and is communicated with a vehicle body controller such as a vehicle instrument and an engine ECM through a CAN bus according to a standard ADAS (Advanced Driver Assistance System) communication protocol to provide real-time map data. The predictive cruising PCC (Predictive Cruise Control) of the intelligent driving control system of the commercial vehicle of the current mass production level also utilizes the information of the vehicle-mounted map equipment to optimally control the vehicle to run, thereby saving fuel and effectively relieving the driving fatigue of a driver.
The technical scheme of the invention is exemplified as follows:
in the normal running process of a heavy vehicle carrying a diesel engine, if the load of the vehicle is too small, the aftertreatment system is always in a low-temperature state, the optimal conversion efficiency of the SCR catalyst cannot be ensured, NOx emission is affected, and at the moment, an engine ECM can be selectively activated or exited from a thermal management mode according to the carrier temperature of the SCR catalyst and road spectrum information of an actual road.
1. Pre-uphill stage of vehicle:
on the premise that the engine has activated the thermal management mode, when the front part is predicted to climb a slope through the information sent by the vehicle-mounted map equipment, the engine load is relatively increased in the climbing process, the exhaust temperature is naturally increased along with the increase of the load, and at the moment, the engine exits or weakens the thermal management mode a certain distance in advance until the climbing is completed, and the next thermal management control decision is re-entered, so that the aim of saving oil is achieved.
2. Pre-downhill phase of the vehicle:
on the premise that the engine has activated the thermal management mode, when the front part is predicted to be on a downhill through the information sent by the vehicle-mounted map equipment, because a driver can loosen an accelerator pedal in the downhill process, the brake pedal is pressed down or the engine auxiliary brake is opened (compression brake in a cylinder, the engine stops injecting fuel), the exhaust valve is closed, the engine does not generate harmful gas any more, the aftertreatment system stops NOx conversion, the temperature of a carrier of the SCR catalyst is not required to be raised, at the moment, the thermal management mode is exited in advance a certain time before the downhill point until the next thermal management control decision is re-entered after the downhill is completed, and therefore the purpose of saving fuel is achieved.
In this embodiment, as shown in fig. 1, the system includes a vehicle map device, a GPS antenna, an engine control module ECM, a post-processing SCR carrier, and further includes a post-processing temperature sensor, an instrument, and other controllers of the vehicle body, such as a gearbox controller, where the predictive thermal management control function has no hardware enabling switch, and the engine ECM directly adjusts combustion and fuel injection through its own logic judgment, without driver interaction. The vehicle-mounted map equipment receives the vehicle positioning and road spectrum information in real time through a GPS antenna and sends the vehicle positioning and road spectrum information to the CAN bus in the form of ADASIS (Advanced Driver Assistance System Interface Specification) messages. The engine ECM reads bus message information and hardware switches, sensors, actuator signals and the like, and controls the engine and post-processing to work normally. Similarly, other vehicle body controllers, such as a gearbox controller, maintain normal vehicle operation via bus or hard-wired signals. The instrument presents a man-machine interaction interface through visual signals such as Chinese display, numbers, indicator lights and the like.
Referring to fig. 5 and 6, the vehicle normally runs on a straight road from a point a at a certain speed, the vehicle-mounted map device normally receives and transmits signals through a GPS antenna, an ADASIS1 message is sent to the vehicle position and road ID, and an ADASIS2 message is sent to road signs, slopes and curvatures for reading by other controllers on the bus. As shown in fig. 5, the engine ECM determines whether thermal management control needs to be activated by the post-processing SCR temperature sensor reading, and determines whether the post-processing SCR temperature is lower than the thermal management set point, if not, it indicates that the post-processing SCR is maintained in the high conversion efficiency range, which indicates that the post-processing SCR temperature can maintain higher conversion efficiency under the current driving condition without additional thermal management control. If the current driving condition is lower in the post-treatment SCR temperature, the thermal management control is activated to enable the SCR to be heated so as to improve the conversion efficiency, the engine is started to enter the SCR thermal management mode through increasing fuel injection and optimizing combustion, the ECM always reads ADAS messages in real time, at the moment, if a certain distance in front of the engine is judged to be an ascending road, as shown in FIG. 6, the distance of the front X of an ascending road section is judged, the gradient of the road is larger than a certain positive value, the road is regarded as an ascending slope, the ECM simultaneously judges the post-treatment SCR temperature T1 at the moment, the condition that the vehicle exits from the point B or weakens the thermal management and drives to the ascending road point at the current speed is ensured, the post-treatment SCR temperature drop delta T1 cannot lead to the conversion efficiency to be suddenly reduced, the distance X, the ascending slope gradient judgment value T1 and the temperature drop limit delta T1 are all calibrated, the working condition simulation or actual road test can be used for calibrating, the principle is that under the premise that the conversion efficiency of the SCR is ensured, the evaluation conversion efficiency is proposed to be larger X value, and urea injection is stopped with the urea injection is not caused on the premise that the temperature drop is lower than a certain value (SCR carrier temperature is lower than a certain value). The vehicle starts to climb after running to the uphill point, and the load of the engine is increased along with the increase of the gradient, so that the temperature of the aftertreatment SCR is correspondingly increased, and the additional thermal management control of the engine is replaced.
After the vehicle climbs, the vehicle enters a straight road again, the ECM of the engine carries out a thermal management control decision according to the post-processing SCR temperature again, the ECM continuously reads an ADAS message, after the engine enters the SCR thermal management again, if the ECM judges that a certain distance ahead occurs to a downhill road according to the information of the vehicle-mounted map device, as shown in fig. 6, the distance from the vehicle to the front Y of the downhill road section is smaller than a certain negative value, the gradient is considered as the downhill, the ECM judges the post-processing SCR temperature T2 at the moment, the temperature drop delta T2 of the post-processing SCR is ensured to not lead to the sudden drop of conversion efficiency when the vehicle exits the thermal management from the point C and runs to the downhill point at the current speed, and meanwhile, the distance Y, the downhill gradient judgment value, the SCR temperature judgment value T2 and the temperature drop limit delta T2 are all calibrated, and can be calibrated through working condition simulation or actual road test, and the principle is that a larger Y value is set on the premise of ensuring the conversion efficiency of the SCR.
In contrast to the pre-uphill stage described above, in the pre-downhill stage, there is no need to weaken the thermal management, and if the conditions are satisfied, the driver directly exits the SCR thermal management, because in the downhill stage, the driver usually releases the accelerator pedal and steps on the brake or activates the brake in the engine cylinder, the engine stops injecting fuel in the brake stage, the post-processing SCR stops NOx conversion, and in the general basic thermal management mode, the temperature of the SCR thermal management boost performed in the pre-downhill stage is an energy waste for the vehicle in the downhill stage, and only the SCR temperature of the vehicle before reaching the downhill point is required to be maintained in a reasonable range. After the vehicle finishes descending the slope, the vehicle enters a straight road again, the engine ECM carries out thermal management control decision again according to the post-processing SCR temperature, and the ECM continuously reads the ADAS message, so that the cycle is carried out.
Example IV
In this embodiment, as shown in fig. 3, there is provided an engine thermal management control apparatus including:
a path information acquisition module 310, configured to acquire path information;
a current position information obtaining module 320, configured to obtain current position information of the vehicle;
a front road spectrum information obtaining module 330, configured to obtain front road spectrum information of a road section ahead on a vehicle driving path based on the path information and the current position information;
the preset road spectrum information detection module 340 is configured to detect whether the front road spectrum information of a front road section on a driving path of the vehicle is preset road spectrum information;
and the thermal management mode changing module 350 is configured to exit the SCR thermal management mode or reduce the power of the SCR system when the front road spectrum information of the front road section on the driving path of the vehicle is the preset road spectrum information.
In one embodiment, the thermal management mode changing module is further configured to exit the SCR thermal management mode or reduce power of the SCR system before traveling a preset distance to a road segment corresponding to the front road spectrum information when the front road spectrum information is the preset road spectrum information.
In one embodiment, the predetermined road profile information includes roads having a slope greater than a predetermined angle.
In one embodiment, the road having the gradient greater than the preset angle includes:
an uphill road with a gradient greater than a first preset angle; and
downhill roads having a gradient greater than a second preset angle.
In one embodiment, the apparatus further comprises:
and the thermal management mode maintaining module is used for maintaining the current SCR thermal management mode or maintaining the power of the SCR system when the front road spectrum information of the front road section on the running path of the vehicle is not the preset road spectrum information.
In one embodiment, the apparatus further comprises:
the preset temperature detection module is used for detecting whether the temperature of the post-treatment SCR is smaller than a preset temperature;
and the thermal management mode starting module is used for starting the SCR thermal management mode or increasing the power of the SCR system when the post-treatment SCR system degree is smaller than the preset temperature.
The specific limitation of the engine thermal management control device may be referred to the limitation of the engine thermal management control method hereinabove, and will not be described herein. The respective units in the engine thermal management control device described above may be implemented in whole or in part by software, hardware, or a combination thereof. The units can be embedded in hardware or independent of a processor in the computer equipment, and can also be stored in a memory in the computer equipment in a software mode, so that the processor can call and execute the operations corresponding to the units.
Example five
In this embodiment, a computer device is provided. The internal structure thereof can be shown in fig. 4. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is arranged to provide computing and control capabilities, which processor in this embodiment is an engine control module ECM. The memory of the computer device includes a non-volatile storage medium and an internal memory. The nonvolatile storage medium stores an operating system and a computer program, and stores path information, road spectrum information, and the like. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used to communicate with other computer devices in which application software is deployed. The computer program when executed by a processor implements a method of engine thermal management control. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the structures shown in FIG. 4 are block diagrams only and do not constitute a limitation of the computer device on which the present aspects apply, and that a particular computer device may include more or less components than those shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory storing a computer program and a processor that when executing the computer program performs the steps of:
acquiring path information;
acquiring current position information of a vehicle;
acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
In one embodiment, the processor when executing the computer program further performs the steps of:
and when the front road spectrum information is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system before the road section corresponding to the front road spectrum information is driven to a preset distance.
In one embodiment, the predetermined road profile information includes roads having a slope greater than a predetermined angle.
In one embodiment, the road having the gradient greater than the preset angle includes:
an uphill road with a gradient greater than a first preset angle; and
downhill roads having a gradient greater than a second preset angle.
In one embodiment, the processor when executing the computer program further performs the steps of:
and when the front road spectrum information of the front road section on the running path of the vehicle is not the preset road spectrum information, maintaining the current SCR thermal management mode or maintaining the power of the SCR system.
In one embodiment, the processor when executing the computer program further performs the steps of:
detecting whether the temperature of the post-treatment SCR is less than a preset temperature;
and when the post-treatment SCR systemicity is smaller than the preset temperature, starting the SCR thermal management mode or increasing the power of an SCR system.
Example six
In this embodiment, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
acquiring path information;
acquiring current position information of a vehicle;
acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and when the front road spectrum information is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system before the road section corresponding to the front road spectrum information is driven to a preset distance.
In one embodiment, the preset road spectrum information includes roads having a gradient greater than a preset angle.
In one embodiment, the road having the gradient greater than the preset angle includes:
an uphill road with a gradient greater than a first preset angle; and
downhill roads having a gradient greater than a second preset angle.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and when the front road spectrum information of the front road section on the running path of the vehicle is not the preset road spectrum information, maintaining the current SCR thermal management mode or maintaining the power of the SCR system.
In one embodiment, the computer program when executed by the processor further performs the steps of:
detecting whether the temperature of the post-treatment SCR is less than a preset temperature;
and when the post-treatment SCR systemicity is smaller than the preset temperature, starting the SCR thermal management mode or increasing the power of an SCR system.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A method of controlling thermal management of an engine, comprising:
acquiring path information;
acquiring current position information of a vehicle;
acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system.
2. The method of claim 1, wherein the step of exiting the SCR thermal management mode or reducing power of the SCR system when the front road spectrum information of the front road segment on the vehicle driving path is preset road spectrum information comprises:
and when the front road spectrum information is the preset road spectrum information, exiting the SCR thermal management mode or reducing the power of the SCR system before the road section corresponding to the front road spectrum information is driven to a preset distance.
3. The method of claim 1, wherein the predetermined road profile information comprises roads having a slope greater than a predetermined angle.
4. A method according to claim 3, wherein the road having a slope greater than a predetermined angle comprises:
an uphill road with a gradient greater than a first preset angle; and
downhill roads having a gradient greater than a second preset angle.
5. The method as recited in claim 1, further comprising:
and when the front road spectrum information of the front road section on the running path of the vehicle is not the preset road spectrum information, maintaining the current SCR thermal management mode or maintaining the power of the SCR system.
6. The method as recited in claim 1, further comprising:
detecting whether the temperature of the post-treatment SCR is less than a preset temperature;
and when the post-treatment SCR systemicity is smaller than the preset temperature, starting the SCR thermal management mode or increasing the power of an SCR system.
7. An engine thermal management control apparatus, comprising:
the path information acquisition module is used for acquiring path information;
the current position information acquisition module is used for acquiring the current position information of the vehicle;
the front road spectrum information acquisition module is used for acquiring front road spectrum information of a front road section on a vehicle driving path based on the path information and the current position information;
the system comprises a preset road spectrum information detection module, a preset road spectrum information detection module and a control module, wherein the preset road spectrum information detection module is used for detecting whether the front road spectrum information of a front road section on a vehicle driving path is preset road spectrum information or not;
and the thermal management mode changing module is used for exiting the SCR thermal management mode or reducing the power of the SCR system when the front road spectrum information of the front road section on the running path of the vehicle is the preset road spectrum information.
8. The apparatus of claim 7, wherein the thermal management mode altering module is further configured to exit the SCR thermal management mode or reduce power of the SCR system before traveling a preset distance to a road segment to which the front road spectrum information corresponds when the front road spectrum information is the preset road spectrum information.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
CN202211616620.9A 2022-12-15 2022-12-15 Engine thermal management control method, device, computer equipment and storage medium Pending CN116146311A (en)

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Application Number Priority Date Filing Date Title
CN202211616620.9A CN116146311A (en) 2022-12-15 2022-12-15 Engine thermal management control method, device, computer equipment and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211616620.9A CN116146311A (en) 2022-12-15 2022-12-15 Engine thermal management control method, device, computer equipment and storage medium

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Publication Number Publication Date
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