CN116624253A - Method and device for measuring oxygen storage capacity, vehicle and storage medium - Google Patents
Method and device for measuring oxygen storage capacity, vehicle and storage medium Download PDFInfo
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- CN116624253A CN116624253A CN202310372938.5A CN202310372938A CN116624253A CN 116624253 A CN116624253 A CN 116624253A CN 202310372938 A CN202310372938 A CN 202310372938A CN 116624253 A CN116624253 A CN 116624253A
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 120
- 239000001301 oxygen Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000000446 fuel Substances 0.000 claims abstract description 125
- 239000003054 catalyst Substances 0.000 claims abstract description 121
- 238000002347 injection Methods 0.000 claims abstract description 81
- 239000007924 injection Substances 0.000 claims abstract description 81
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000013076 target substance Substances 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000004590 computer program Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 description 21
- 230000001276 controlling effect Effects 0.000 description 20
- 230000006870 function Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 230000001960 triggered effect Effects 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
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- 230000003197 catalytic effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 for example Chemical compound 0.000 description 1
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Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1624—Catalyst oxygen storage capacity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The application provides a method, a device, a vehicle and a storage medium for measuring oxygen storage capacity, wherein the method comprises the following steps: when the current working mode of the vehicle is a preset target working mode, controlling a hybrid motor of the vehicle to enter a lean-burn state; in the lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle; triggering in-cylinder fuel post-injection, and determining the existing time of a target event under the action of the in-cylinder fuel post-injection; the target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than a preset temperature; and determining the oxygen storage capacity of the catalyst according to the presence time. The method can make the measuring process of the oxygen storage capacity of the catalyst simpler and more convenient.
Description
Technical Field
The present application relates to the field of vehicles, and more particularly, to a method, apparatus, vehicle, and storage medium for measuring oxygen storage capacity in the field of vehicles.
Background
Oxygen storage capacity (OSC, oxygen Storage Capacity) is an important indicator of catalyst in aftertreatment systems, and is of great importance for both critical (or aged) catalyst determination and catalyst diagnosis. However, in order to measure OSC, the catalyst in the aftertreatment system needs to be removed, and measurement is performed on a dedicated measurement device, so that the measurement process is not simple and convenient.
Disclosure of Invention
The application provides a method, a device, a vehicle and a storage medium for measuring oxygen storage capacity, which can make the measuring process of the oxygen storage capacity of a catalyst simpler and more convenient.
In a first aspect, there is provided a method of measuring oxygen storage capacity, the method comprising: when the current working mode of the vehicle is a preset target working mode, controlling a hybrid motor of the vehicle to enter a lean-burn state; wherein, in the lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle; triggering in-cylinder fuel post-injection, and determining the existing time of a target event under the action of the in-cylinder fuel post-injection; the target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than a preset temperature; and determining the oxygen storage capacity of the catalyst according to the presence time.
In the technical scheme, the mixing machine is controlled to enter the lean-burn state under the target working mode, so that oxygen in the tail gas is adsorbed by target substances in the catalyst under the lean-burn state, namely the catalyst can store oxygen under the lean-burn state. Then, the oxygen storage capacity of the catalyst is identified through the oxidation heating characteristic of the catalyst generated by post-injection fuel. Namely CO, HC, PAH, aldehyde and other substances in the post-injection fuel oil and oxygen adsorbed by target substances in the catalyst produce oxidation exothermic reaction, so that the temperature difference between the rear end temperature of the catalyst and the front end temperature of the catalyst is larger. The target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than the preset temperature, so that the existence time of the target event can reflect the oxygen storage capacity of the catalyst to a certain extent. Thus, based on the time of existence of the target event, the oxygen storage capacity of the catalyst may be determined relatively accurately. In addition, in the technical scheme, the catalyst does not need to be detached from the post-treatment system of the vehicle, and the oxygen storage capacity of the catalyst can be measured directly on the vehicle, so that the measuring process is simpler and more convenient.
With reference to the first aspect, in some possible implementations, the target operation mode is a series mode or a parallel mode of a hybrid system of the vehicle.
In the technical scheme, under the serial mode or the parallel mode, the exhaust temperature of the hybrid machine is easier to enter a stable state, so that the accuracy of oxygen storage capacity measurement can be improved.
With reference to the first aspect, in some possible implementations, the triggering in-cylinder fuel post-injection includes: controlling the hybrid engine to enter a theoretical air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
In the above technical solution, the stoichiometric air-fuel ratio corresponds to that fuel and air are fully combusted, and the exhaust gas does not contain oxygen in theory. Therefore, under the theoretical air-fuel ratio state, the fuel in the cylinder is triggered to spray, so that the exhaust gas discharged by the mixing machine at the moment is prevented from containing oxygen, and the interference of the oxygen in the exhaust gas on the measurement of the current oxygen storage capacity is further avoided.
With reference to the first aspect, in some possible implementations, the triggering in-cylinder fuel post-injection includes: determining whether an exhaust temperature of a hybrid machine of the vehicle satisfies a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period; and triggering in-cylinder fuel post injection under the condition that the preset condition is met.
In the above technical scheme, when it is determined that the exhaust temperature of the hybrid engine of the vehicle meets the preset condition, it is indicated that the exhaust temperature of the hybrid engine has entered a stable state, and then the in-cylinder fuel post-injection is triggered, so that under the effect of the in-cylinder fuel post-injection, the front end temperature of the measured catalyst is also more stable, and the difference error between the front end temperature and the rear end temperature of the catalyst is reduced, thereby improving the accuracy of oxygen storage capacity measurement.
With reference to the first aspect, in some possible implementations, the triggering in-cylinder fuel post-injection includes: determining whether an exhaust temperature of a hybrid machine of the vehicle satisfies a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period; when the preset condition is determined to be met, controlling the hybrid engine to enter a theoretical air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
In the technical scheme, the difference error between the front end temperature and the rear end temperature of the catalyst can be reduced while the interference of the oxygen in the tail gas to the measurement of the oxygen storage capacity can be avoided, so that the accuracy of the measurement of the oxygen storage capacity can be improved.
With reference to the first aspect, in some possible implementations, when the current working mode of the vehicle is a preset target working mode, the controlling the hybrid engine of the vehicle to enter a lean burn state includes: whenever the vehicle is detected to travel a preset mileage, determining whether the current working mode of the vehicle is a preset target working mode; and when the current working mode of the vehicle is determined to be the preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state.
With reference to the first aspect, in some possible implementations, the determining the oxygen storage capacity of the catalyst according to the presence time includes: when the existing time is longer than a second preset time length, determining that the catalyst has oxygen storage capacity; and when the existing time is smaller than or equal to the second preset time length, determining that the catalyst does not have the oxygen storage capacity.
With reference to the first aspect, in some possible implementations, the second preset time period is greater than or equal to 3 seconds.
In the above technical scheme, considering that the catalyst which is about to fail in aging, i.e. the catalyst which basically does not have the oxygen storage capacity, can only enable the rear end temperature to be higher than the front end temperature by more than a preset temperature under the post-spraying action for 3 seconds, therefore, 3 seconds are taken as a measure of whether the catalyst has the oxygen storage capacity, and the method is favorable for accurately determining whether the catalyst has the oxygen storage capacity at present.
With reference to the first aspect, in some possible implementations, the triggering in-cylinder fuel post-injection includes: triggering fuel post-injection in a cylinder, and controlling the fuel post-injection to last for a third preset duration; wherein the third preset time period is longer than the second preset time period.
With reference to the first aspect, in some possible implementations, the preset temperature is determined based on the post-injection amount, and the larger the post-injection amount is, the larger the preset temperature is.
In a second aspect, there is provided a device for measuring oxygen storage capacity, the device comprising: the device comprises a control module, a triggering module and a determining module; the control module is used for controlling the hybrid motor of the vehicle to enter a lean-burn state when the current working mode of the vehicle is a preset target working mode; wherein, in the lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle; the triggering module is used for triggering in-cylinder fuel post-injection and determining the existence time of a target event under the action of the in-cylinder fuel post-injection; the target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than a preset temperature; the determining module is used for determining the oxygen storage capacity of the catalyst according to the existing time.
With reference to the second aspect, in some possible implementations, the target operation mode is a series mode or a parallel mode of a hybrid system of the vehicle.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, a triggering module is specifically configured to control the hybrid engine to enter a stoichiometric air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection. Or the triggering module is specifically used for determining whether the exhaust temperature of the hybrid motor of the vehicle meets a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period; and triggering in-cylinder fuel post injection under the condition that the preset condition is met. Or the triggering module is specifically used for determining whether the exhaust temperature of the hybrid motor of the vehicle meets a preset condition; when the preset condition is determined to be met, controlling the hybrid engine to enter a theoretical air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the control module is specifically configured to determine whether a current operation mode of the vehicle is a preset target operation mode whenever it is detected that the vehicle travels a preset mileage; and when the current working mode of the vehicle is determined to be the preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the determining module is specifically configured to determine that the catalyst has an oxygen storage capability when the existing time is greater than a second preset duration; and when the existing time is smaller than or equal to the second preset time length, determining that the catalyst does not have the oxygen storage capacity.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the second preset time period is greater than or equal to 3 seconds.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the triggering module is specifically configured to trigger in-cylinder fuel post-injection, and control the fuel post-injection to last for a third preset duration; wherein the third preset time period is longer than the second preset time period.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the preset temperature is determined based on the post-injection quantity, and the larger the post-injection quantity is, the larger the preset temperature is.
In a third aspect, a vehicle is provided that includes a memory and a processor. The memory is for storing executable program code and the processor is for calling and running the executable program code from the memory for causing the electronic device to perform the method of the first aspect or any one of the possible implementations of the first aspect.
In a fourth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.
In a fifth aspect, a computer readable storage medium is provided, the computer readable storage medium storing computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.
Drawings
FIG. 1 is a schematic illustration of an aftertreatment system for a vehicle, provided in an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of a method for measuring oxygen storage capacity according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of another method for measuring oxygen storage capacity according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of an oxygen storage capacity measurement device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
The technical scheme of the application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B: the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.
The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
With the increasing severity of global environmental problems, emission reduction is an important task for the development of the automobile industry. The hybrid electric vehicle is used as a novel vehicle product, and not only can achieve the effect of reducing fuel consumption, but also has the effect of reducing emission, so that the hybrid electric vehicle becomes the main stream of the development of the vehicle industry in a long time in the future.
Some of the power systems require engine-provided functions that can be realized by the functional development of hybrid engine innovations. In a hybrid vehicle, the engine operating point is adjusted by selecting a region with a smaller fuel consumption rate as an engine operating region according to the performance characteristics of the engine and the engine speed and torque. If the engine does not work in the area, the torque of the engine is regulated through the power generation and the power assistance of the motor, so that the engine works in the economic interval, and the aims of reducing emission and oil consumption are achieved.
The hybrid system has a plurality of working modes: in mode 1, the motor is driven by pure electric power, and the motor is not operated at this moment, and the battery supplies power to the motor, so that the motor drives wheels to operate, namely, the motor is completely driven by the battery to operate. Mode 2, series mode, the engine drive electricity generation, and the engine is used for the battery electricity generation this moment, then the battery gives the motor power supply, lets the motor drive wheel operation. And 3, the engine is independently driven to work, the battery and the motor are not operated, and the engine is completely driven to work by a transmission system. Mode 4, parallel mode, the motor drives the transmission system, and the battery also supplies power to the motor, which is equivalent to the parallel operation of the motor, the battery and the generator. Wherein the engine in the hybrid system may also be referred to as a hybrid. Thus, the above mode 2 can also be described as: the hybrid motor of the vehicle is used for generating electricity to a battery of the vehicle, and the battery is used for driving an electric motor of the vehicle to work. Mode 4 above can also be described as: the hybrid motor drives the drive train while the battery powers the motor.
The oxygen storage (Oxygen Storage Capacity, OSC) is an important indicator of the catalyst in the aftertreatment system, and is of great importance for both critical (or aged) catalyst determination and catalyst diagnosis. However, in order to measure OSC, the catalyst in the aftertreatment system needs to be removed, and measurement is performed on a dedicated measurement device, so that the measurement process is not simple and convenient.
To solve the above-mentioned technical problems, the embodiment of the present application provides a method for measuring oxygen storage capacity, which can be applied to a vehicle having a hybrid system, and in particular, an electronic control unit (Electronic Control Unit, ECU) in the vehicle.
To facilitate an understanding of the implementation of embodiments of the present application, a vehicle aftertreatment system is first described. As shown in fig. 1, in the aftertreatment system, the exhaust gas from the vehicle enters from the exhaust valve, passes through the supercharger, and then flows through the catalyst and the diesel particulate filter (Diesel Particulate Filter, DPF) in this order. The catalyst may be Lean NOX Traps (LNT) or three-way catalytic converters (TWCs), among others. The three-way catalytic converter is a catalytic converter capable of purifying three pollutants of hydrocarbon, carbon monoxide and oxynitride in automobile exhaust simultaneously, and has the function of reducing most exhaust pollutants discharged by an engine. The DPF traps carbon particles in the exhaust gas.
In this embodiment, the measurement of the oxygen storage capacity of the catalyst can be simply and conveniently performed without removing the catalyst in fig. 1. The following describes a method for measuring oxygen storage capacity in this embodiment:
Fig. 2 is a schematic flow chart of a method for measuring oxygen storage capacity according to an embodiment of the present application.
Illustratively, as shown in FIG. 2, the method includes:
step 201: and when the current working mode of the vehicle is a preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state. Wherein, in the lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle.
Step 202: triggering in-cylinder fuel post-injection, and determining the existence time of a target event under the action of the in-cylinder fuel post-injection. The target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference between the rear end temperature and the front end temperature is greater than a preset temperature.
Step 203: based on the time of existence, the oxygen storage capacity of the catalyst is determined.
In the embodiment shown in fig. 2, the hybrid is controlled to enter a lean-burn state by controlling the hybrid in the target operation mode such that oxygen in the exhaust gas is adsorbed by the target substance in the catalyst in the lean-burn state, i.e., the catalyst can store oxygen in the lean-burn state. Then, the oxygen storage capacity of the catalyst is identified through the oxidation heating characteristic of the catalyst generated by post-injection fuel. Namely CO, HC, PAH, aldehyde and other substances in the post-injection fuel oil and oxygen adsorbed by target substances in the catalyst produce oxidation exothermic reaction, so that the temperature difference between the rear end temperature of the catalyst and the front end temperature of the catalyst is larger. The target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than the preset temperature, so that the existence time of the target event can reflect the oxygen storage capacity of the catalyst to a certain extent. Thus, based on the time of existence of the target event, the oxygen storage capacity of the catalyst may be determined relatively accurately. In addition, in the technical scheme, the catalyst does not need to be detached from the post-treatment system of the vehicle, and the oxygen storage capacity of the catalyst can be measured directly on the vehicle, so that the measuring process is simpler and more convenient.
The following describes a specific embodiment of each step in fig. 2:
in step 201, the ECU may first determine a current operation mode of the vehicle, which may be a current operation mode of a hybrid system of the vehicle. And when the current working mode of the vehicle is determined to be the preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state. The current operation mode of the vehicle may be any one of a plurality of operation modes of the hybrid system. The target operation mode may be an operation mode that makes it easy for the exhaust temperature of the hybrid machine to reach a steady state, where the steady state may be understood as: the variation amplitude of the exhaust temperature is smaller than the preset amplitude in a certain time. The preset amplitude can be set according to actual needs, and aims to show that the change of the exhaust temperature is small in a certain time.
In an exemplary embodiment, the target operating mode is a series mode or a parallel mode of a hybrid system of the vehicle in which the hybrid of the vehicle is used to generate electricity for a battery of the vehicle, the battery being used to drive an electric motor of the vehicle to operate; in parallel mode, the battery powers the electric motor while the hybrid drives the driveline. That is, the target operation mode may be the mode 2 or the mode 4 described above.
In this embodiment, in the series mode or the parallel mode, the exhaust temperature of the hybrid engine is easier to enter a stable state, so that the accuracy of oxygen storage capacity measurement can be improved.
In the exemplary embodiment, since the series mode is easier to enter the steady state than the parallel mode, the exhaust temperature of the engine is easier to enter the steady state because in the series mode, the engine, i.e., the above-described hybrid, is only used for driving power generation. Thus, the hybrid machine of the vehicle can be controlled to enter the lean-burn state when it is determined that the current operation mode of the vehicle is the series mode.
When the hybrid engine of the vehicle enters a lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle in the lean-burn state. The air-fuel ratio in the lean state is greater than 14.7, which is the stoichiometric air-fuel ratio: 1, the air-fuel ratio is the mass ratio between air and fuel. The nature of the lean condition is therefore "more air and relatively less fuel", which means that a portion of the oxygen in the air is not combusted, but is present in the exhaust. The oxygen in the exhaust gas is "temporarily adsorbed" by the target substance in the catalyst, which is the so-called oxygen storage mode. The target substance may be a chemical substance for adsorbing oxygen, for example, cerium, and the molecular formula is Ce. The chemical reaction for adsorbing oxygen may be as follows:
Ce 2 O 3 +1/2O 2 →2CeO 2
In an exemplary embodiment, the step 101 includes: whenever the vehicle is detected to travel a preset mileage, determining whether the current working mode of the vehicle is a preset target working mode. And when the current working mode of the vehicle is determined to be the preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state. The preset mileage may be set according to actual needs, for example, may be set to 50 km, 100 km or 200 km, however, the specific size of the preset mileage is not limited in this embodiment. That is, in this embodiment, the steps 201 to 203 may be performed once every time the vehicle detects that the vehicle travels a preset mileage, which is advantageous to meet the actual measurement requirement of the oxygen storage capacity.
In step 202, the ECU may trigger in-cylinder fuel post injection, and determine the time of existence of a target event under the effect of in-cylinder fuel post injection, where the target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference between the rear end temperature and the front end temperature is greater than a preset temperature.
The fuel in the cylinder is injected after the normal fuel injection of the engine is ignited, and the fuel injector additionally injects the fuel into the cylinder in the descending process of the piston. The purpose of post-spraying is to make CO, HC, PAH and aldehyde in the post-spraying substances and Ce absorbed oxygen in the catalyst produce an oxidation exothermic reaction, and the oxidation reaction formula is as follows:
CO+1/2O 2 →CO 2
HC+O 2 →CO 2 +H2O
PAH+O 2 →CO 2 +H2O
aldehyde+O 2 →CO 2 +H2O
It can be understood that when the catalyst has the oxygen storage capability, the rear end temperature of the catalyst is higher than the front end temperature of the catalyst for a period of time due to the exothermic oxidation reaction occurring in the catalyst under the action of the fuel post injection. In this embodiment, the front end temperature may be measured by the high temperature sensor 1 at the front end of the catalyst in fig. 1, and the rear end temperature may be measured by the high temperature sensor 2 at the rear end of the catalyst. The high temperature sensor 1 and the high temperature sensor 2 can respectively return the front end temperature and the rear end temperature which are obtained by measuring the high temperature sensor 1 and the high temperature sensor 2 to the ECU, so that the ECU can determine whether a target event occurs that the rear end temperature is higher than the front end temperature and the difference value between the rear end temperature and the front end temperature is higher than the preset temperature, and record the existence time of the target event. The preset temperature may be set according to actual needs, which is not particularly limited in this embodiment.
In an exemplary embodiment, the preset temperature may be determined based on a post-injection amount, the greater the preset temperature. The fuel injection quantity can be fuel quality, specifically, the magnitude of the preset temperature can be determined according to the fuel quality of each cylinder after injection, the larger the fuel quality of each cylinder after injection is, the larger the preset temperature is, the smaller the fuel quality of each cylinder after injection is, and the corresponding preset temperature can be smaller. For example, when the fuel is controlled to be injected 4mg per cylinder in the post-injection, the temperature measured by the high-temperature sensor 2 behind the catalyst can be made higher by more than 100 ℃ than the temperature measured by the high-temperature sensor 1 in front of the catalyst. Therefore, in the present embodiment, the preset temperature can be set to 100 degrees with control of 4mg of fuel per cylinder at the time of post-injection. When the fuel is sprayed later, the preset temperature can be set to be more than 100 degrees under the condition that each cylinder is controlled to spray more than 4mg of fuel each time.
In an exemplary embodiment, the triggering of the in-cylinder fuel post-injection includes: and controlling the hybrid engine to enter a theoretical air-fuel ratio state. And under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection. In this embodiment, the hybrid is controlled to enter the stoichiometric air-fuel ratio state before the in-cylinder fuel post injection is triggered, so that the in-cylinder fuel post injection is triggered in the stoichiometric air-fuel ratio state. The stoichiometric air-fuel ratio corresponds to the condition that fuel and air are fully combusted, and the tail gas does not contain oxygen in theory. Therefore, under the theoretical air-fuel ratio state, the fuel in the cylinder is triggered to spray, so that the exhaust gas discharged by the mixing machine at the moment is prevented from containing oxygen, and the interference of the oxygen in the exhaust gas on the measurement of the current oxygen storage capacity is further avoided.
Wherein, the theoretical air-fuel ratio state is that the current air-fuel ratio is 14.7:1. theoretical air-fuel ratio 14.7:1 corresponds to the fuel and air being fully combusted, and the tail gas theoretically contains no oxygen. In practice, even if the exhaust gas contains oxygen, the oxygen content is small. The subsequent monitoring is completed under the theoretical air-fuel ratio, so that the exhaust gas exhausted by the engine at the moment is prevented from containing oxygen as much as possible, and the interference of the oxygen in the exhaust gas on the monitoring is further avoided.
In an exemplary embodiment, the ECU may control the hybrid machine of the vehicle to enter a stoichiometric air-fuel ratio state after a predetermined period of time has elapsed after controlling the hybrid machine to enter a lean burn state. The preset time length can be set according to actual needs, for example, the value can be between 30 seconds and 40 seconds, so that the catalyst has sufficient time for oxygen storage.
In an exemplary embodiment, the triggering of the in-cylinder fuel post-injection includes: determining whether an exhaust temperature of a hybrid machine of the vehicle satisfies a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period; and triggering in-cylinder fuel post injection under the condition that the preset condition is met. The preset condition may indicate that the exhaust temperature of the hybrid machine is currently in a steady state, that is, when it is determined that the exhaust temperature of the hybrid machine is currently in a steady state, in-cylinder fuel post injection is triggered.
The first preset duration and the preset variation can be set according to actual needs, and the variation used for representing that the exhaust temperature of the hybrid machine is smaller in a certain duration can be regarded as the exhaust temperature is stable. For example, the first preset time period may take a value between 15 seconds and 35 seconds, and the preset variation may take a value between 15 ℃ and 35 ℃. Illustratively, the first predetermined time period may take 20 seconds and the predetermined amount of change may take 20 ℃. However, the magnitudes of the first preset time period and the preset variation amount are not particularly limited in this embodiment.
For example, after the hybrid machine enters the lean burn state, it may be detected whether the exhaust temperature of the hybrid machine satisfies a preset condition for the first time. Detecting whether the exhaust temperature of the hybrid machine meets the preset condition for the first time is beneficial to reducing the detection time, thereby being beneficial to improving the measurement speed of the oxygen storage capacity to a certain extent.
For example, referring to fig. 1, when the temperature of the exhaust gas discharged from the hybrid machine is negligible in temperature loss from the exhaust valve to the high temperature sensor 1, the temperature of the exhaust gas of the hybrid machine may also be the temperature measured by the high temperature sensor 1. Therefore, the above preset conditions can be understood as: the variation of the front end temperature of the catalyst in the first preset time period is smaller than the preset variation.
For example, referring to fig. 1, when the temperature of the exhaust gas discharged from the hybrid machine is not negligible from the exhaust valve to the high temperature sensor 1, a temperature sensor may be provided between the exhaust valve and the supercharger in fig. 1, so that the temperature of the exhaust gas of the hybrid machine may be measured by the temperature sensor.
For example, referring to fig. 1, a damping value of the exhaust temperature from the exhaust valve to the high temperature sensor 1 may be calculated based on a distance between the exhaust valve and the high temperature sensor 1 and a unit temperature damping value corresponding to the unit distance, and then a sum of the temperature value measured by the high temperature sensor 1 and the calculated damping value of the exhaust temperature may be used as the exhaust temperature of the hybrid machine, so that the exhaust temperature of the engine may be accurately obtained without increasing the temperature sensor.
In this embodiment, when it is determined that the exhaust temperature of the hybrid engine of the vehicle meets the preset condition, it is indicated that the exhaust temperature of the hybrid engine has entered a stable state, and then the in-cylinder fuel post-injection is triggered, so that under the effect of the in-cylinder fuel post-injection, the front end temperature of the measured catalyst is also more stable, which is beneficial to improving and reducing the difference error between the front end temperature and the rear end temperature of the catalyst, so that the accuracy of oxygen storage capacity measurement can be improved.
In an exemplary embodiment, the triggering of the in-cylinder fuel post-injection includes: determining whether an exhaust temperature of a hybrid machine of the vehicle satisfies a preset condition; when the preset condition is determined to be met, controlling the hybrid engine to enter a theoretical air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
In this embodiment, when it is determined that the exhaust temperature of the hybrid engine of the vehicle satisfies the preset condition, the hybrid engine may be controlled to enter the stoichiometric air-fuel ratio state first, and then the in-cylinder fuel post injection may be triggered when the exhaust temperature of the hybrid engine of the vehicle satisfies the preset condition and when the hybrid engine enters the stoichiometric air-fuel ratio state. The method can reduce the difference error between the front end temperature and the rear end temperature of the catalyst while avoiding the interference of oxygen in the tail gas on the measurement of the oxygen storage capacity, thereby improving the accuracy of the measurement of the oxygen storage capacity.
In step 203, the ECU may determine the oxygen storage capacity of the catalyst based on the presence time measured in step 202. The size of the existing time can be used for measuring whether the catalyst has the oxygen storage capacity or not. For example, a longer residence time indicates a better oxygen storage capacity of the catalyst, and a shorter residence time indicates a worse oxygen storage capacity of the catalyst.
In an exemplary embodiment, the implementation of step 203 may include: when the existing time is longer than the second preset time length, determining that the catalyst has the oxygen storage capacity; and when the existing time is less than or equal to the second preset time period, determining that the catalyst does not have the oxygen storage capacity. The second preset time period can be set according to actual needs, and the second preset time period can be used for defining whether the catalyst has the oxygen storage capacity or not.
The inventor of the present application found through researches that, for a catalyst that is aged and is about to fail, the catalyst may not have oxygen storage capability, and the catalyst can only enable the rear end temperature to be higher than the front end temperature by more than a preset temperature under the post-spraying effect for 3 seconds, so that the second preset time length in the embodiment may be greater than or equal to 3 seconds, and 3 seconds is taken as a measure of whether the catalyst has oxygen storage capability, which is favorable for accurately determining whether the catalyst currently has oxygen storage capability.
In an exemplary embodiment, the triggering of the in-cylinder fuel post-injection includes: triggering fuel post-injection in the cylinder, and controlling the fuel post-injection to last for a third preset time length, wherein the third preset time length is longer than the second preset time length. The third preset duration may be set according to actual needs, for example, the third preset duration may be the second preset duration plus a time required for the substances reacting with oxygen, such as CO, HC, PAH, aldehyde, and the like, in the post-spraying substances to flow into the catalyst, so that the substances reacting with oxygen, such as CO, HC, PAH, aldehyde, and the like, in the post-spraying substances react with oxygen, and oxygen adsorbed by Ce in the catalyst have sufficient time to generate oxidation and heat release reactions, which is favorable for improving accuracy of measurement of oxygen storage capacity to a certain extent.
In one possible implementation, the third preset duration may take a value between 10 seconds and 30 seconds. The third preset time period may be set to 20 seconds, for example, however, the specific value of the third preset time period is not particularly limited in this embodiment.
In an exemplary embodiment, assuming that the preset temperature is 100 ℃, the first preset duration is 20 seconds, the preset variation is 20 ℃, the preset mileage is 100 km, the second preset duration is 3 seconds, and the third preset duration is 20 seconds, under the above numerical condition, each time the vehicle travels 100 km, steps 301 to 307 as described in fig. 3 may be performed:
Step 301: when the vehicle is determined to enter an engine-driven power generation mode, the engine is used for generating power for the battery, and then the battery-driven motor is operated to control the hybrid motor to enter a lean-burn state.
That is, after determining that the vehicle enters the series mode described above, the hybrid is controlled to enter a lean state (air-fuel ratio > 14.7:1).
Step 302: it is detected whether the first occurrence of "20 seconds exhaust temperature change does not exceed 20 ℃". If so, step 303 is entered, otherwise step 302 is continued.
That is, it is detected whether the exhaust temperature of the hybrid machine satisfies the preset condition, if so, step 304 is entered, if not, step 302 may be continued.
Step 303: the hybrid is controlled to enter a stoichiometric air-fuel ratio state (air-fuel ratio=14.7:1).
Step 304: after triggering the fuel injection for 20 seconds, determining the time t when the temperature of the rear end of the catalyst is 100 ℃ higher than the temperature of the front end.
That is, the in-cylinder fuel post-injection is triggered for 20 seconds, and the presence time t of the target event is determined by the in-cylinder fuel post-injection.
Step 305: it is determined whether t is greater than 3 seconds. If yes, go to step 306, otherwise go to step 307.
Step 306: the catalyst was determined to have oxygen storage capacity.
Step 307: it was determined that the catalyst did not have oxygen storage capacity.
In this embodiment, the advantage that the exhaust temperature in the series mode of the hybrid system is easier to enter a stable state is utilized, after the hybrid system of the vehicle enters the series mode, the hybrid machine is controlled to enter a lean burn state so that the catalyst in the aftertreatment system stores oxygen, and then, under the condition that the exhaust temperature is determined to enter the stable state, the hybrid machine is controlled to enter 14.7:1, and identifying whether the catalyst has oxygen storage capacity or not according to the oxidation heating characteristic of the catalyst generated by post-injection fuel. In the embodiment, the oxygen storage capacity of the catalyst can be accurately measured directly on the vehicle, and the catalyst is aimed to be as simple and practical as possible without being detached from the vehicle.
Fig. 4 is a schematic structural diagram of an apparatus for measuring oxygen storage capacity according to an embodiment of the present application.
Illustratively, as shown in FIG. 4, the apparatus includes: a control module 401, a trigger module 402 and a determination module 403; the control module 401 is configured to control the hybrid engine of the vehicle to enter a lean burn state when a current working mode of the vehicle is a preset target working mode; wherein, in the lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle; the triggering module 402 is used for triggering in-cylinder fuel post-injection and determining the existence time of a target event under the action of the in-cylinder fuel post-injection; the target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than a preset temperature; the determining module 403 is configured to determine an oxygen storage capacity of the catalyst based on the time of presence.
In a possible implementation manner, the target operation mode is a series mode or a parallel mode of a hybrid system of the vehicle.
In one possible implementation, the triggering module 402 is specifically configured to control the hybrid engine to enter a stoichiometric air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
In one possible implementation, the triggering module 402 is specifically configured to determine whether an exhaust temperature of a hybrid engine of the vehicle meets a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period; and triggering in-cylinder fuel post injection under the condition that the preset condition is met.
In one possible implementation, the triggering module 402 is specifically configured to determine whether an exhaust temperature of a hybrid engine of the vehicle meets a preset condition; when the preset condition is determined to be met, controlling the hybrid engine to enter a theoretical air-fuel ratio state; and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
In a possible implementation manner, the control module 403 is specifically configured to determine whether the current operation mode of the vehicle is a preset target operation mode whenever it is detected that the vehicle has traveled a preset mileage; and when the current working mode of the vehicle is determined to be the preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state.
In a possible implementation manner, the determining module 403 is specifically configured to determine that the catalyst has an oxygen storage capability when the existing time is greater than a second preset duration; and when the existing time is smaller than or equal to the second preset time length, determining that the catalyst does not have the oxygen storage capacity.
In a possible implementation, the second preset time period is greater than or equal to 3 seconds.
In a possible implementation manner, the triggering module 402 is specifically configured to trigger in-cylinder fuel post-injection, and control the fuel post-injection to last for a third preset duration; wherein the third preset time period is longer than the second preset time period.
In a possible implementation manner, the preset temperature is determined based on the post-injection quantity, and the larger the post-injection quantity is, the larger the preset temperature is.
Fig. 5 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Illustratively, as shown in FIG. 5, the vehicle includes: memory 501 and processor 502, wherein memory 501 stores executable program code, and processor 502 is configured to invoke and execute the executable program code to perform a method for measuring oxygen storage capacity.
In this embodiment, the vehicle may be divided into functional modules according to the above method example, for example, each functional module may be corresponding to a specific functional module, or two or more functions may be integrated into one processing module, where the integrated modules may be implemented in a hardware form. It should be noted that, in this embodiment, the division of the modules is schematic, only one logic function is divided, and another division manner may be implemented in actual implementation.
In the case of dividing each function module with corresponding each function, the vehicle may include: control module, trigger module and determination module etc.. It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.
The vehicle provided in the present embodiment is used for executing the above-described method for measuring the oxygen storage capacity, and therefore the same effects as those of the above-described implementation method can be achieved.
In case an integrated unit is employed, the vehicle may comprise a processing module, a memory module. The processing module can be used for controlling and managing the actions of the vehicle. The memory module may be used to support the vehicle in executing, inter alia, program code and data.
Wherein a processing module may be a processor or controller that may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the present disclosure. A processor may also be a combination of computing functions, e.g., including one or more microprocessors, digital signal processing (digital signal processing, DSP) and microprocessor combinations, etc., and a memory module may be a memory.
The present embodiment also provides a computer-readable storage medium having stored therein computer program code which, when run on a computer, causes the computer to perform the above-described related method steps to implement a method for measuring oxygen storage capacity in one of the above-described embodiments.
The present embodiment also provides a computer program product which, when run on a computer, causes the computer to perform the above-described related steps to implement a method for measuring oxygen storage capacity in the above-described embodiments.
In addition, the vehicle provided by the embodiment of the application can be a chip, a component or a module, and the vehicle can comprise a processor and a memory which are connected; the memory is used for storing instructions, and the processor can call and execute the instructions when the vehicle runs, so that the chip can execute the method for measuring the oxygen storage capacity in the embodiment.
The vehicle, the computer readable storage medium, the computer program product or the chip provided in this embodiment are used to execute the corresponding method provided above, so that the benefits achieved by the method can refer to the benefits in the corresponding method provided above, and are not repeated herein.
It will be appreciated by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
1. A method for measuring oxygen storage capacity, comprising:
when the current working mode of the vehicle is a preset target working mode, controlling a hybrid motor of the vehicle to enter a lean-burn state; wherein, in the lean-burn state, oxygen in the exhaust gas is adsorbed by a target substance in a catalyst of the vehicle;
triggering in-cylinder fuel post-injection, and determining the existing time of a target event under the action of the in-cylinder fuel post-injection; the target event is that the rear end temperature of the catalyst is higher than the front end temperature of the catalyst, and the difference value between the rear end temperature and the front end temperature is greater than a preset temperature;
and determining the oxygen storage capacity of the catalyst according to the presence time.
2. The method of claim 1, wherein the target operating mode is a series mode or a parallel mode of a hybrid system of the vehicle.
3. The method of claim 1, wherein said triggering in-cylinder fuel post-injection comprises:
controlling the hybrid engine to enter a theoretical air-fuel ratio state;
triggering fuel post injection in the cylinder under the theoretical air-fuel ratio state;
or alternatively, the process may be performed,
determining whether an exhaust temperature of a hybrid machine of the vehicle satisfies a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period;
Triggering in-cylinder fuel post-injection under the condition that the preset condition is met;
or alternatively, the process may be performed,
determining whether an exhaust temperature of a hybrid machine of the vehicle satisfies a preset condition; the preset condition is that the variation of the exhaust temperature of the hybrid machine is smaller than a preset variation within a first preset time period;
when the preset condition is determined to be met, controlling the hybrid engine to enter a theoretical air-fuel ratio state;
and under the theoretical air-fuel ratio state, triggering in-cylinder fuel post injection.
4. The method of claim 1, wherein controlling the hybrid machine of the vehicle to enter a lean burn state when the current operating mode of the vehicle is a preset target operating mode comprises:
whenever the vehicle is detected to travel a preset mileage, determining whether the current working mode of the vehicle is a preset target working mode;
and when the current working mode of the vehicle is determined to be the preset target working mode, controlling the hybrid motor of the vehicle to enter a lean-burn state.
5. The method of claim 1, wherein said determining the oxygen storage capacity of the catalyst based on the time of presence comprises:
when the existing time is longer than a second preset time length, determining that the catalyst has oxygen storage capacity;
And when the existing time is smaller than or equal to the second preset time length, determining that the catalyst does not have the oxygen storage capacity.
6. The method of claim 1, wherein the second predetermined time period is greater than or equal to 3 seconds.
7. The method of claim 5 or 6, wherein said triggering in-cylinder fuel post-injection comprises:
triggering fuel post-injection in a cylinder, and controlling the fuel post-injection to last for a third preset duration; wherein the third preset time period is longer than the second preset time period.
8. The method according to any one of claims 1 to 6, characterized in that the preset temperature is determined based on the post-injection amount, the larger the preset temperature.
9. A vehicle, characterized in that the vehicle comprises:
a memory for storing executable program code;
a processor for calling and running the executable program code from the memory, causing the vehicle to perform the method of any one of claims 1 to 8.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed, implements the method according to any of claims 1 to 8.
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| CN202310372938.5A CN116624253A (en) | 2023-04-10 | 2023-04-10 | Method and device for measuring oxygen storage capacity, vehicle and storage medium |
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| CN202310372938.5A CN116624253A (en) | 2023-04-10 | 2023-04-10 | Method and device for measuring oxygen storage capacity, vehicle and storage medium |
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