CN115075925A - Method and system for monitoring regeneration state of particle catcher - Google Patents
Method and system for monitoring regeneration state of particle catcher Download PDFInfo
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- CN115075925A CN115075925A CN202210854561.2A CN202210854561A CN115075925A CN 115075925 A CN115075925 A CN 115075925A CN 202210854561 A CN202210854561 A CN 202210854561A CN 115075925 A CN115075925 A CN 115075925A
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- 230000008929 regeneration Effects 0.000 title claims abstract description 323
- 238000011069 regeneration method Methods 0.000 title claims abstract description 323
- 239000002245 particle Substances 0.000 title claims abstract description 150
- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 123
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 123
- 238000011068 loading method Methods 0.000 claims description 54
- 238000009825 accumulation Methods 0.000 claims description 6
- 239000004071 soot Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002567 autonomic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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Abstract
The application relates to a method and a system for monitoring the regeneration state of a particle catcher, which comprises the steps of switching a parking regeneration switch and a regeneration forbidding switch, then calculating the carbon load capacity of the particle catcher according to the working condition information of a vehicle, and sending the carbon load capacity load information to an automobile instrument; judging whether the current carbon load is larger than the target carbon load, if so, automatically entering the vehicle to actively regenerate and lightening a high-temperature lamp, and if the current vehicle working condition does not meet the active regeneration condition of the vehicle, pressing a parking regeneration switch to trigger parking regeneration in a parking state; and finally, when the automobile enters a parking regeneration state, the parking regeneration state information and the reminding information are sent to the automobile instrument. Therefore, the method and the device can enable a driver to know the carbon load of the particle catcher and the real-time regeneration state of the particle catcher by watching the automobile instrument, and remind the driver to carry out active regeneration or service regeneration when the carbon load of the particle catcher reaches the target carbon load.
Description
Technical Field
The application relates to the technical field of engine postprocessors, in particular to a method and a system for monitoring a regeneration state of a particle catcher.
Background
In order to reduce the particulate emission of heavy vehicles and meet the emission regulation requirements of the six stages of China, a DPF must be installed on an engine exhaust pipe for reducing the particulate emission of the engine. The DPF is an extruded cylindrical ceramic structure with thousands of small parallel channels in the exhaust direction. The ceramic is used as the coating surface, so that the porosity can be controlled more accurately and higher porosity can be obtained. Every two adjacent channels are blocked at the inlet and the outlet, and after the exhaust gas flows in from one channel, the exhaust gas must pass through the porous wall surface of the ceramic and flow out from the adjacent channel, so that large particles which cannot pass through the inner wall surface of the porous channel in the exhaust gas are left on the wall surface of each inflow channel.
In the process of DPF filtration, carbon particles can be gathered on the filtering wall of the DPF, so that the flow area of gas is reduced, the exhaust back pressure of an engine is increased, the exhaust back pressure is increased to a certain degree, the operation of the engine is obviously deteriorated, the fuel economy and the dynamic performance of the engine are affected, and therefore deposited particles need to be removed in time to enable the engine to recover normal operation. The regeneration of the DPF is divided into active regeneration and passive regeneration, and the DPF regeneration is different from the normal running state of the vehicle, such as the idle speed is increased, the temperature of the exhaust gas of the engine is increased, and the like.
The inside carbon loading capacity of DPF and trigger DPF regeneration function through engine control ware autonomic calculation DPF of current technical scheme, and not interacted through instrument and driver, the driver can't know current DPF state, also can't know whether DPF regenerates, can lead to the driver to stop suddenly under this kind of condition and break DPF regeneration influence regeneration efficiency, also can lead to the driver to get into inflammable and explosive object next door and lead to appearing the high temperature problem of catching fire.
Disclosure of Invention
The embodiment of the application provides a method and a system for monitoring the regeneration state of a particle trap, and aims to solve the problem that in the related technology, the DPF regeneration function is triggered, interaction is not carried out between an instrument and a driver, and the driver cannot know the current DPF state.
In a first aspect, an embodiment of the present application provides a method for monitoring a regeneration status of a particle trap, including the following steps:
switching a parking regeneration switch and a regeneration forbidding switch, if the parking regeneration switch is turned on, displaying parking regeneration reminding information by the automobile instrument, and if the regeneration forbidding switch is turned on, displaying regeneration forbidding reminding information by the automobile instrument;
according to the vehicle working condition information, calculating the carbon load of the particle catcher, and sending the carbon load information to the automobile instrument, wherein the automobile instrument displays the current carbon load by percentage symbols;
judging whether the current carbon load is larger than the target carbon load, if so, automatically entering driving active regeneration of the vehicle, and if the current vehicle working condition does not meet the driving active regeneration condition, pressing a parking regeneration switch to trigger parking regeneration in a parking state;
and when the automobile enters the parking regeneration state, the parking regeneration state information and the reminding information are sent to the automobile instrument, and the automobile instrument displays the parking regeneration state information and the reminding information.
In some embodiments: the method for calculating the carbon load of the particle catcher according to the vehicle working condition information comprises the following steps:
the pressure drop without a root of the particle trap is simplified to the following equation:
in the above formula, a 1 Is the physical characteristic coefficient of the particle trap, Δ a 1 Influence of ash, a 2 Is the flow characteristic coefficient, mu is the exhaust dynamic viscosity, flow vol Is the volume flow of the exhaust gas, and rho is the density of the exhaust gas;
meanwhile, the pressure drop caused by accumulation when the particle catcher has a root is simplified as follows:
ΔP soot ＝ΔP sensor -ΔP clean_filter
in the above formula, Δ Psensor is a differential pressure sensor value;
the normalized root pressure drop is defined as the pressure drop at a temperature of 25 ℃ and a flow rate of 100L/s, and the root pressure drop calculation can be converted by the following equation:
then the carbon loading percentage of the particle catcher can be obtained by reading map according to the root _ index;
after the percentage of carbon loading of the particle trap is obtained, the value of the current carbon loading is obtained according to the target carbon loading of the particle trap, wherein the carbon loading is the percentage of carbon loading and the target carbon loading.
In some embodiments: if the current vehicle working condition is judged not to meet the driving active regeneration condition, the engine thermal management system improves the exhaust temperature of the engine to realize the parking regeneration of the particle catcher, and the engine controller monitors the parking regeneration state of the particle catcher and sends a monitoring result to an instrument;
if the parking regeneration of the particle catcher is in progress, the word reminding information of 'DPF regeneration in progress' is continuously displayed on the automobile instrument, and if the parking regeneration of the particle catcher is finished, the word reminding information of 'DPF parking regeneration finished' reminding a set time period is displayed on the automobile instrument.
In some embodiments: and when the automobile enters a parking regeneration state, monitoring the inlet temperature of the particle catcher, generating high-temperature early warning information if the inlet temperature of the particle catcher reaches 300-1000 ℃, sending the high-temperature early warning information to the automobile instrument, and continuously displaying the high-temperature early warning information by the automobile instrument until the inlet temperature of the particle catcher is lower than 300 ℃ and quitting the high-temperature early warning information.
In some embodiments: if the current vehicle working condition cannot meet the driving active regeneration condition or the regeneration fails after entering the parking regeneration state, diagnosing and generating vehicle regeneration failure reason information, sending the vehicle regeneration failure reason information to a vehicle instrument, and displaying the vehicle regeneration failure reason information by the vehicle instrument;
if the vehicle regeneration failure reasons are multiple, the vehicle regeneration failure reasons are displayed in sequence according to the priority orders of the multiple vehicle regeneration failure reasons, or the vehicle regeneration failure reason information with the highest priority is displayed according to the priority orders of the multiple vehicle regeneration failure reasons.
A second aspect of embodiments of the present application provides a particle trap regeneration status monitoring system, including:
the system comprises a central console, a parking regeneration switch and a regeneration forbidding switch, wherein if the parking regeneration switch is turned on, the automobile instrument displays parking regeneration reminding information, and if the regeneration forbidding switch is turned on, the automobile instrument displays regeneration forbidding reminding information;
the engine controller is used for calculating the carbon load of the particle catcher according to the vehicle working condition information and sending the carbon load information to the automobile instrument, and the automobile instrument displays the current carbon load by percentage symbols;
the carbon loading capacity judging module is used for judging whether the current carbon loading capacity load is larger than the target carbon loading capacity, if so, the vehicle automatically enters driving active regeneration, and if the current vehicle working condition does not meet the driving active regeneration condition, a parking regeneration switch is pressed down in a parking state to trigger parking regeneration;
and the gateway controller is used for sending the parking regeneration state information and the reminding information to the automobile instrument when entering the regeneration state, and the automobile instrument displays the parking regeneration state information and the reminding information.
In some embodiments: the engine controller calculates a carbon load of the particle trap based on vehicle operating condition information, comprising:
the pressure drop without a root of the particle trap is simplified to the following equation:
in the above formula, a 1 Is the physical characteristic coefficient of the particle trap, Δ a 1 Influence of ash, a 2 Is the flow coefficient, mu is the exhaust dynamic viscosity, flow vol Is the volume flow of the exhaust gas, and rho is the density of the exhaust gas;
meanwhile, the pressure drop caused by accumulation when the particle catcher has a root is simplified as follows:
ΔP soot ＝ΔP sensor -ΔP clean_filter
in the above formula, Δ Psensor is a differential pressure sensor value;
the standard root pressure drop is defined as the pressure drop at a temperature of 25 ℃ and a flow rate of 100L/s, and the calculation result of the root pressure drop can be converted by the following formula:
then the carbon loading percentage of the particle catcher can be obtained by reading map according to the root _ index;
after the percentage of carbon loading of the particle trap is obtained, the value of the current carbon loading is obtained according to the target carbon loading of the particle trap, wherein the carbon loading is the percentage of carbon loading and the target carbon loading.
In some embodiments: if the carbon carrying capacity judging module judges that the current vehicle working condition cannot meet the driving active regeneration condition, the engine heat management system improves the exhaust temperature of the engine to realize the parking regeneration of the particle catcher, the engine controller monitors the parking regeneration state of the particle catcher and sends a monitoring result to the instrument;
if the parking regeneration of the particle catcher is in progress, the word reminding information of 'DPF regeneration in progress' is continuously displayed on the automobile instrument, and if the parking regeneration of the particle catcher is finished, the word reminding information of 'DPF parking regeneration finished' reminding a set time period is displayed on the automobile instrument.
In some embodiments: the engine controller is also used for monitoring the inlet temperature of the particle catcher when entering a parking regeneration state, generating high-temperature early warning information if the inlet temperature of the particle catcher reaches 300-1000 ℃, sending the high-temperature early warning information to the automobile instrument, and continuously displaying the high-temperature early warning information by the automobile instrument until the inlet temperature of the particle catcher is lower than 300 ℃ and quitting the high-temperature early warning information.
In some embodiments: if the carbon loading capacity judging module judges that the current vehicle working condition cannot meet the driving active regeneration condition or the vehicle is in a parking regeneration state and then fails in regeneration, the carbon loading capacity judging module diagnoses and generates vehicle regeneration failure reason information, sends the vehicle regeneration failure reason information to a vehicle instrument, and the vehicle instrument displays the vehicle regeneration failure reason information;
if the vehicle regeneration failure reasons are multiple, sequentially displaying the vehicle regeneration failure reasons according to the priority orders of the multiple vehicle regeneration failure reasons, or displaying the vehicle regeneration failure reason information with the highest priority according to the priority orders of the multiple vehicle regeneration failure reasons.
The technical scheme who provides this application brings beneficial effect includes:
the embodiment of the application provides a method and a system for monitoring the regeneration state of a particle trap, wherein the method for controlling the regeneration state of the particle trap firstly switches a parking regeneration switch and a regeneration prohibition switch, if the parking regeneration switch is turned on, an automobile instrument displays parking regeneration reminding information, and if the regeneration prohibition switch is turned on, the automobile instrument displays regeneration prohibition reminding information; then according to the vehicle working condition information, calculating the carbon load of the particle catcher, and sending the carbon load information to the automobile instrument, wherein the automobile instrument displays the current carbon load by percentage symbols; judging whether the current carbon load is larger than the target carbon load, if so, automatically entering active regeneration of the vehicle, and if the current vehicle working condition does not meet the active regeneration condition of the vehicle, pressing a parking regeneration switch to trigger parking regeneration in a parking state; and finally, when the automobile enters a parking regeneration state, transmitting parking regeneration state information and reminding information to the automobile instrument, and displaying the parking regeneration state information and the reminding information by the automobile instrument. Therefore, the method and the device can enable a driver to know the carbon load of the particle catcher and the real-time regeneration state of the particle catcher by watching the automobile instrument, and remind the driver to carry out active regeneration or service regeneration when the carbon load of the particle catcher reaches the target carbon load.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method according to an embodiment of the present application;
fig. 2 is a block diagram of a system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a method and a system for monitoring the regeneration state of a particle trap, which can solve the problem that the current DPF state cannot be known by a driver because the DPF regeneration function is triggered without interaction with the driver through an instrument in the related technology.
Referring to fig. 1, a first aspect of the embodiments of the present application provides a method for monitoring a regeneration status of a particle trap, including the following steps:
step 101, switching a parking regeneration switch and a regeneration prohibition switch, if the parking regeneration switch is turned on, no matter whether the regeneration mode is entered, displaying parking regeneration reminding information such as a text reminding of turning on the parking regeneration switch and an icon for displaying DPF regeneration by an automobile instrument; if the regeneration prohibiting switch is turned on, the automobile instrument displays the regeneration prohibiting reminding information, such as a character reminding of 'prohibiting the regeneration switch from being turned on' and an icon of prohibiting the DPF from being regenerated, whether a regeneration request exists or not. The regeneration forbidding switch is used for limiting the vehicle to enter active regeneration according to the actual working condition of the vehicle, and safety accidents such as spontaneous combustion and explosion of the active regeneration are prevented.
Step 102, calculating the carbon load of the particle catcher according to the vehicle working condition information, and sending the carbon load information to the automobile instrument, wherein the automobile instrument displays the current carbon load by percentage symbols. The driver can observe the carbon load information of the current particle catcher in real time through the automobile instrument so as to be convenient for the driver to carry out active regeneration in time and prevent the particle catcher from being blocked to cause vehicle speed limit and torque limit or cause the particle catcher to be blocked to be scrapped.
And 103, judging whether the current carbon load is larger than the target carbon load, if so, automatically entering driving active regeneration and lighting a high-temperature lamp, and if the current vehicle working condition does not meet the driving active regeneration condition, pressing a parking regeneration switch in a parking state to trigger parking regeneration. If the current carbon load is larger than the target carbon load, the vehicle automatically enters a driving active regeneration state, and if the current carbon load is larger than the target carbon load and does not meet driving active regeneration conditions, a parking regeneration switch is pressed to trigger parking regeneration in the parking state, so that the active regeneration state of the particle catcher is realized. The current vehicle operating mode satisfies following operating mode and can trigger the parking and regenerate:
the vehicle speed is 0; the accelerator pedal is not stepped on; the brake pedal is not stepped on; the clutch pedal is not stepped on; the gear is in a neutral gear; the hand brake of the whole vehicle is tightened; starting the engine to maintain idle speed; the water temperature reaches more than 40 ℃; the parking regeneration switch is turned on; no DPF and engine related failures; the PTO switch is not turned on; exhaust temperature reaches a set threshold, the particle trap is unplugged, and so on.
And 104, when entering a parking regeneration state, sending parking regeneration state information and reminding information to the automobile instrument, and displaying the parking regeneration state information and the reminding information by the automobile instrument. When entering a parking regeneration state, the engine controller monitors the parking regeneration state of the DPF and sends a monitoring result to an automobile instrument, and when the parking regeneration of the DPF is in progress, the automobile instrument always reminds the word display of 'DPF regeneration in progress' and lights a high-temperature lamp; and when the DPF parking regeneration is finished, continuing the word prompt of 3s 'DPF parking regeneration finished'.
In some alternative embodiments: the embodiment of the application provides a method for monitoring the regeneration state of a particle catcher, which calculates the carbon load of the particle catcher according to the working condition information of a vehicle and comprises the following steps:
the pressure drop without a root of the particle trap is simplified to the following equation:
in the above formula, a 1 Is the physical characteristic coefficient of the particle trap, Δ a 1 Influence of ash, a 2 Is the flow coefficient, mu is the exhaust dynamic viscosity, flow vol Is the volume flow of the exhaust gas, and rho is the density of the exhaust gas;
meanwhile, the pressure drop caused by accumulation when the particle catcher has a root is simplified as follows:
ΔP soot ＝ΔP sensor -ΔP clean_filter
in the above formula, Δ Psensor is a differential pressure sensor value;
the standard root pressure drop is defined as the pressure drop at a temperature of 25 ℃ and a flow rate of 100L/s, and the calculation result of the root pressure drop can be converted by the following formula:
then, the carbon loading percentage of the particle catcher can be obtained by reading map according to the root _ index;
map is as follows:
after the percentage of carbon loading of the particle trap is obtained, the value of the current carbon loading is obtained according to the target carbon loading of the particle trap, wherein the carbon loading is the percentage of carbon loading and the target carbon loading.
In some alternative embodiments: the embodiment of the application provides a method for monitoring the regeneration state of a particle trap, and if the method judges that the current vehicle working condition cannot meet the driving active regeneration condition, an engine heat management system improves the exhaust temperature of an engine to realize parking regeneration of the particle trap, an engine controller monitors the parking regeneration state of the particle trap, and a monitoring result is sent to an instrument. If the parking regeneration of the particle catcher is in progress, character reminding information of 'DPF regeneration in progress' is continuously displayed on the automobile instrument, and if the parking regeneration of the particle catcher is finished, character reminding information of 'DPF parking regeneration finished' reminding a set time period is displayed on the automobile instrument.
In some alternative embodiments: the embodiment of the application provides a method for monitoring the regeneration state of a particle trap, which comprises the steps of monitoring the inlet temperature of the particle trap when the particle trap enters a parking regeneration state, generating high-temperature early warning information if the inlet temperature of the particle trap reaches 300-1000 ℃, and sending the high-temperature early warning information to an automobile instrument, wherein the automobile instrument continuously displays the high-temperature early warning information until the inlet temperature of the particle trap is lower than 600 ℃, and then quitting the high-temperature early warning information. The high-temperature early warning information can be realized by flashing a high-temperature lamp, high-temperature character reminding or high-temperature voice reminding of an automobile instrument and the like. When the particle catcher is in a regeneration state, the engine and the postprocessor are in a high-temperature state, a driver is reminded that parking regeneration needs to be carried out in an open place, flammable and explosive articles such as a gas station and a gas filling station cannot exist around the particle catcher, and high-temperature fire accidents are prevented.
In some alternative embodiments: the embodiment of the application provides a method for monitoring the regeneration state of a particle trap, if the current vehicle working condition cannot meet the driving active regeneration condition or the regeneration fails after entering the parking regeneration state, the method diagnoses and generates the reason information of the vehicle regeneration failure, and sends the reason information of the vehicle regeneration failure to a vehicle instrument, and the vehicle instrument displays the reason information of the vehicle regeneration failure to help a driver eliminate the current fault and quickly start the driving active regeneration or the parking regeneration. If the vehicle regeneration failure reasons are multiple, sequentially displaying the vehicle regeneration failure reasons according to the priority orders of the multiple vehicle regeneration failure reasons, or displaying the vehicle regeneration failure reason information with the highest priority according to the priority orders of the multiple vehicle regeneration failure reasons.
Referring to fig. 2, a second aspect of an embodiment of the present application provides a system for monitoring a regeneration status of a particle trap, including:
the system comprises a center console, a vehicle and a control panel, wherein the center console is provided with a parking regeneration switch and a regeneration forbidding switch, if the parking regeneration switch is turned on, no matter whether a regeneration mode is entered, parking regeneration reminding information is displayed by an automobile instrument, such as a text reminding of turning on the parking regeneration switch and an icon for displaying DPF regeneration; if the regeneration prohibiting switch is turned on, the automobile instrument displays the regeneration prohibiting reminding information, such as a character reminding of 'prohibiting the regeneration switch from being turned on' and an icon of prohibiting the DPF from being regenerated, whether a regeneration request exists or not. The regeneration forbidding switch is used for limiting the vehicle to enter active regeneration according to the actual working condition of the vehicle, and safety accidents such as spontaneous combustion and explosion of the active regeneration are prevented.
And the engine controller is used for calculating the carbon load of the particle catcher according to the vehicle working condition information and sending the carbon load information to the automobile instrument, and the automobile instrument displays the current carbon load by percentage symbols. The driver can observe the carbon load information of the current particle catcher in real time through the automobile instrument so as to be convenient for the driver to carry out active regeneration in time and prevent the particle catcher from being blocked to cause vehicle speed limit and torque limit or cause the particle catcher to be blocked to be scrapped.
And judging whether the current carbon load is larger than the target carbon load, if so, automatically entering the driving active regeneration of the vehicle and lightening a high-temperature lamp, and if the current vehicle working condition does not meet the driving active regeneration condition, pressing a parking regeneration switch to trigger parking regeneration in a parking state. If the current carbon load is larger than the target carbon load, the vehicle automatically enters a driving active regeneration state, and if the current carbon load is larger than the target carbon load and does not meet driving active regeneration conditions, a parking regeneration switch is pressed to trigger parking regeneration in the parking state, so that the active regeneration state of the particle catcher is realized. The current vehicle operating mode satisfies following operating mode and can trigger the parking and regenerate:
the vehicle speed is 0; the accelerator pedal is not stepped on; the brake pedal is not stepped on; the clutch pedal is not stepped on; the gear is in a neutral gear; the hand brake of the whole vehicle is tightened; starting the engine to maintain idle speed; the water temperature reaches above 40 ℃; the parking regeneration switch is turned on; no DPF and engine related failures; the PTO switch is not turned on; exhaust temperature reaches a set threshold, the particle trap is unplugged, and so on.
And the gateway controller is used for sending the parking regeneration state information and the reminding information to the automobile instrument when entering the parking regeneration state, and the automobile instrument displays the parking regeneration state information and the reminding information. When entering a parking regeneration state, the engine controller monitors the parking regeneration state of the DPF, sends a monitoring result to an automobile instrument through a gateway controller, and always reminds the word display of 'DPF regeneration in progress' when the parking regeneration of the DPF is in progress; and when the DPF parking regeneration is finished, reminding 3s of word reminding of finishing the DPF parking regeneration.
In some alternative embodiments: the embodiment of the application provides a particle catcher regeneration state monitoring system, and an engine controller of the system calculates the carbon load capacity load of the particle catcher according to vehicle working condition information, and the system comprises:
the pressure drop without a root of the particle trap is simplified to the following equation:
in the above formula, a 1 Is the physical characteristic coefficient of the particle trap, Δ a 1 For the effects of ash, a 2 Is the flow coefficient, mu is the exhaust dynamic viscosity, flow vol Is the volume flow of the exhaust gas, and rho is the density of the exhaust gas;
meanwhile, the pressure drop caused by accumulation when the particle catcher has a root is simplified as follows:
ΔP soot ＝ΔP sensor -ΔP clean_filter
in the above formula, Δ Psensor is a differential pressure sensor value;
the standard root pressure drop is defined as the pressure drop at a temperature of 25 ℃ and a flow rate of 100L/s, and the calculation result of the root pressure drop can be converted by the following formula:
then the carbon loading percentage of the particle catcher can be obtained by reading map according to the root _ index;
map is as follows:
after the percentage of carbon loading of the particle trap is obtained, the value of the current carbon loading is obtained according to the target carbon loading of the particle trap, wherein the carbon loading is the percentage of carbon loading and the target carbon loading.
In some alternative embodiments: the embodiment of the application provides a particle trap regeneration state monitoring system, and if the carbon capacity of the system judges that the current vehicle working condition cannot meet the driving active regeneration condition, an engine heat management system improves the exhaust temperature of an engine to realize parking regeneration of the particle trap, and an engine controller monitors the parking regeneration state of the particle trap and sends a monitoring result to an instrument. If the parking regeneration of the particle catcher is in progress, character reminding information of 'DPF regeneration in progress' is continuously displayed on the automobile instrument, and if the parking regeneration of the particle catcher is finished, character reminding information of 'DPF parking regeneration finished' reminding a set time period is displayed on the automobile instrument.
In some alternative embodiments: the embodiment of the application provides a system for monitoring the regeneration state of a particle catcher, wherein an engine controller of the system is also used for monitoring the inlet temperature of the particle catcher when entering a parking regeneration state, if the inlet temperature of the particle catcher reaches 300-1000 ℃, high-temperature early warning information is generated at 600 ℃, the high-temperature early warning information is sent to an automobile instrument, and the automobile instrument continuously displays the high-temperature early warning information until the inlet temperature of the particle catcher is lower than 600 ℃, and the high-temperature early warning information is exited. The high-temperature early warning information can be realized by flashing a high-temperature lamp by an automobile instrument, reminding by high-temperature characters or reminding by high-temperature voice and the like. When the particle catcher is in an active regeneration state, the engine and the postprocessor are in a high-temperature state, a driver is reminded that parking regeneration needs to be carried out in an open place, flammable and explosive materials such as a gas station and a gas filling station cannot exist around the driver, and high-temperature fire accidents are prevented.
In some alternative embodiments: the embodiment of the application provides a particle trap regeneration state monitoring system, if the carbon loading capacity judging module of the system judges that the current vehicle working condition cannot meet the driving active regeneration condition or the regeneration fails after entering a parking regeneration state, the reason information of the vehicle regeneration failure is diagnosed and generated, the reason information of the vehicle regeneration failure is sent to a vehicle instrument, and the vehicle instrument displays the reason information of the vehicle regeneration failure to help a driver to eliminate the current fault and quickly start the parking regeneration. If the vehicle regeneration failure reasons are multiple, the vehicle regeneration failure reasons are displayed in sequence according to the priority orders of the multiple vehicle regeneration failure reasons, or the vehicle regeneration failure reason information with the highest priority is displayed according to the priority orders of the multiple vehicle regeneration failure reasons.
Principle of operation
The embodiment of the application provides a method and a system for monitoring the regeneration state of a particle trap, wherein the method for controlling the regeneration state of the particle trap firstly switches a parking regeneration switch and a regeneration prohibition switch, if the parking regeneration switch is turned on, an automobile instrument displays parking regeneration reminding information, and if the regeneration prohibition switch is turned on, the automobile instrument displays regeneration prohibition reminding information; and then according to the vehicle working condition information, calculating the carbon load of the particle catcher, and sending the carbon load information to the automobile instrument, wherein the automobile instrument displays the current carbon load by a percentage symbol.
Judging whether the current carbon load is larger than the target carbon load, if so, automatically entering active regeneration of the vehicle, and if the current vehicle working condition does not meet the active regeneration condition of the vehicle, pressing a parking regeneration switch to trigger parking regeneration in a parking state; and finally, when the automobile enters a parking regeneration state, the parking regeneration state information and the reminding information are sent to the automobile instrument, and the automobile instrument displays the parking regeneration state information and the reminding information. Therefore, the method and the device can enable a driver to know the carbon load of the particle catcher and the real-time regeneration state of the particle catcher by watching the automobile instrument, and remind the driver to carry out active regeneration or service regeneration when the carbon load of the particle catcher reaches the target carbon load.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of monitoring regeneration status of a particle trap, comprising the steps of:
switching a parking regeneration switch and a regeneration forbidding switch, if the parking regeneration switch is turned on, displaying parking regeneration reminding information by the automobile instrument, and if the regeneration forbidding switch is turned on, displaying regeneration forbidding reminding information by the automobile instrument;
according to the vehicle working condition information, calculating the carbon load of the particle catcher, and sending the carbon load information to the automobile instrument, wherein the automobile instrument displays the current carbon load by percentage symbols;
judging whether the current carbon load is larger than the target carbon load, if so, automatically entering driving active regeneration of the vehicle, and if the current vehicle working condition does not meet the driving active regeneration condition, pressing a parking regeneration switch to trigger parking regeneration in a parking state;
and when the automobile enters the parking regeneration state, the parking regeneration state information and the reminding information are sent to the automobile instrument, and the automobile instrument displays the parking regeneration state information and the reminding information.
2. The method of claim 1, wherein calculating the carbon load of the particle trap based on vehicle operating condition information comprises:
the pressure drop without a root of the particle trap is simplified to the following equation:
in the above formula, a 1 Is the physical characteristic coefficient of the particle trap, Δ a 1 Influence of ash, a 2 Is the flow coefficient, mu is the exhaust dynamic viscosity, flow vol Is the volume flow of the exhaust gas, and rho is the density of the exhaust gas;
meanwhile, the pressure drop caused by accumulation when the particle catcher has a root is simplified as follows:
ΔP soot ＝ΔP sensor -ΔP czean_filter
in the above formula, Δ Psensor is a differential pressure sensor value;
the standard root pressure drop is defined as the pressure drop at a temperature of 25 ℃ and a flow rate of 100L/s, and the calculation result of the root pressure drop can be converted by the following formula:
then, the carbon loading percentage of the particle catcher can be obtained by reading map according to the root _ index;
after the percentage of carbon loading of the particle trap is obtained, the value of the current carbon loading is obtained according to the target carbon loading of the particle trap, wherein the carbon loading is the percentage of carbon loading and the target carbon loading.
3. A method of monitoring the regeneration status of a particle trap as defined in claim 1, wherein:
if the current vehicle working condition is judged not to meet the driving active regeneration condition, the engine thermal management system improves the exhaust temperature of the engine to realize the parking regeneration of the particle catcher, and the engine controller monitors the parking regeneration state of the particle catcher and sends a monitoring result to an instrument;
if the parking regeneration of the particle catcher is in progress, character reminding information of 'DPF regeneration in progress' is continuously displayed on the automobile instrument, and if the parking regeneration of the particle catcher is finished, character reminding information of 'DPF parking regeneration finished' reminding a set time period is displayed on the automobile instrument.
4. A method of monitoring the regeneration status of a particle trap as defined in claim 1, wherein:
and when the automobile enters a parking regeneration state, monitoring the inlet temperature of the particle catcher, generating high-temperature early warning information if the inlet temperature of the particle catcher reaches 300-1000 ℃, sending the high-temperature early warning information to the automobile instrument, and continuously displaying the high-temperature early warning information by the automobile instrument until the inlet temperature of the particle catcher is lower than 300 ℃ and quitting the high-temperature early warning information.
5. A method of monitoring the regeneration status of a particle trap as defined in claim 1, wherein:
if the current vehicle working condition cannot meet the driving active regeneration condition or the regeneration fails after entering the parking regeneration state, diagnosing and generating vehicle regeneration failure reason information, sending the vehicle regeneration failure reason information to a vehicle instrument, and displaying the vehicle regeneration failure reason information by the vehicle instrument;
if the vehicle regeneration failure reasons are multiple, the vehicle regeneration failure reasons are displayed in sequence according to the priority orders of the multiple vehicle regeneration failure reasons, or the vehicle regeneration failure reason information with the highest priority is displayed according to the priority orders of the multiple vehicle regeneration failure reasons.
6. A particle trap regeneration status monitoring system, comprising:
the system comprises a central console, a parking regeneration switch and a regeneration forbidding switch, wherein if the parking regeneration switch is turned on, the automobile instrument displays parking regeneration reminding information, and if the regeneration forbidding switch is turned on, the automobile instrument displays regeneration forbidding reminding information;
the engine controller is used for calculating the carbon load of the particle catcher according to the vehicle working condition information and sending the carbon load information to the automobile instrument, and the automobile instrument displays the current carbon load by percentage symbols;
the carbon loading capacity judging module is used for judging whether the current carbon loading capacity load is larger than the target carbon loading capacity, if so, the vehicle automatically enters driving active regeneration, and if the current vehicle working condition does not meet the driving active regeneration condition, a parking regeneration switch is pressed down in a parking state to trigger parking regeneration;
and the gateway controller is used for sending the parking regeneration state information and the reminding information to the automobile instrument when entering the parking regeneration state, and the automobile instrument displays the parking regeneration state information and the reminding information.
7. The system for monitoring the regeneration status of a particle trap as defined in claim 6, wherein the engine controller calculates the carbon load of the particle trap based on vehicle operating condition information, comprising:
the pressure drop without a root of the particle trap is simplified to the following equation:
in the above formula, a 1 Is the physical characteristic coefficient of the particle trap, Δ a 1 Influence of ash, a 2 Is the flow characteristic coefficient, mu is the exhaust dynamic viscosity, flow vol Is the volume flow of the exhaust gas, and rho is the density of the exhaust gas;
meanwhile, the pressure drop caused by accumulation when the particle catcher has a root is simplified as follows:
ΔP soot ＝ΔP sensor -ΔP czean_filter
in the above formula, Δ Psensor is a differential pressure sensor value;
the normalized root pressure drop is defined as the pressure drop at a temperature of 25 ℃ and a flow rate of 100L/s, and the root pressure drop calculation can be converted by the following equation:
then the carbon loading percentage of the particle catcher can be obtained by reading map according to the root _ index;
after the percentage of carbon loading of the particle trap is obtained, the value of the current carbon loading is obtained according to the target carbon loading of the particle trap, wherein the carbon loading is the percentage of carbon loading and the target carbon loading.
8. A particle trap regeneration status monitoring system as defined in claim 6, wherein:
if the carbon carrying capacity judging module judges that the current vehicle working condition cannot meet the driving active regeneration condition, the engine heat management system improves the exhaust temperature of the engine to realize the parking regeneration of the particle catcher, the engine controller monitors the parking regeneration state of the particle catcher and sends a monitoring result to the instrument;
if the parking regeneration of the particle catcher is in progress, character reminding information of 'DPF regeneration in progress' is continuously displayed on the automobile instrument, and if the parking regeneration of the particle catcher is finished, character reminding information of 'DPF parking regeneration finished' reminding a set time period is displayed on the automobile instrument.
9. A particle trap regeneration status monitoring system as defined in claim 6, wherein:
the engine controller is also used for monitoring the inlet temperature of the particle catcher when entering a parking regeneration state, generating high-temperature early warning information if the inlet temperature of the particle catcher reaches 300-1000 ℃, sending the high-temperature early warning information to the automobile instrument, and continuously displaying the high-temperature early warning information by the automobile instrument until the inlet temperature of the particle catcher is lower than 300 ℃ and quitting the high-temperature early warning information.
10. A particle trap regeneration status monitoring system as defined in claim 6, wherein:
if the carbon loading capacity judging module judges that the current vehicle working condition cannot meet the driving active regeneration condition or the vehicle is in a parking regeneration state and then fails in regeneration, the carbon loading capacity judging module diagnoses and generates vehicle regeneration failure reason information, sends the vehicle regeneration failure reason information to a vehicle instrument, and the vehicle instrument displays the vehicle regeneration failure reason information;
if the vehicle regeneration failure reasons are multiple, the vehicle regeneration failure reasons are displayed in sequence according to the priority orders of the multiple vehicle regeneration failure reasons, or the vehicle regeneration failure reason information with the highest priority is displayed according to the priority orders of the multiple vehicle regeneration failure reasons.
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