CN104895686A - Method and system for determining oxygen concentration of exhaust gas of engine - Google Patents
Method and system for determining oxygen concentration of exhaust gas of engine Download PDFInfo
- Publication number
- CN104895686A CN104895686A CN201510229236.7A CN201510229236A CN104895686A CN 104895686 A CN104895686 A CN 104895686A CN 201510229236 A CN201510229236 A CN 201510229236A CN 104895686 A CN104895686 A CN 104895686A
- Authority
- CN
- China
- Prior art keywords
- motor
- temperature
- entering
- air
- mass flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a method for determining oxygen concentration of exhaust gas of an engine. The method comprises the steps that firstly, the inflation efficiency of the engine, the rotating speed of the engine and the exhaust amount of the engine are utilized for calculating the total gas inlet mass flow of the engine, and then, the temperature of air entering the engine, temperature of the waste gas entering the engine, temperature of mixed gas entering the engine and the total air inlet mass flow of the engine are utilized for calculating the mass flow of air entering the engine and the mass flow of the waste gas entering the engine; on the basis of data, the oxygen concentration of the waste gas of the engine can be determined. According to the method for determining the oxygen concentration of the waste gas of the engine, after the engine is started, the oxygen concentration of the waste gas in the engine can be rapidly determined, sensibility of a pipeline structure is reduced, so that the requirement of pipeline layout of the engine can be reduced. The invention further discloses a system for determining the oxygen concentration of the exhaust gas of the engine.
Description
Technical field
The invention belongs to gas detection technology field, particularly relate to the method and system of the oxygen concentration determining engine exhaust.
Background technique
Motor Vehicle can discharge a large amount of nitrogen oxide (as NO and NO2) in running, and nitrogen oxide generates under high-temperature oxygen-enriched condition.In order to the content of nitrogen oxide in reduce engine motor vehicle exhaust, there is EGR (EGR) system at present: the portion discharged by motor imports in the air inlet pipeline of motor, waste gas enters in the cylinder of motor after mixing with air, the temperature in cylinder and oxygen content can be reduced, thus reduce the content of nox in exhaust.
In order to ensure the power performance of motor, appropriate waste gas be controlled and participate in recirculation.And determine that the process need of the exhausted air quantity participating in recirculation realizes based on the oxygen content of engine exhaust.The oxygen content of current detection engine exhaust is main in the following ways: one, waste pipe installs oxygen concentration sensor additional, is measured the oxygen concentration in waste gas by oxygen concentration sensor in real time; Two, the suction tude of motor installs oxygen concentration sensor additional, is calculated the oxygen concentration in waste gas by the oxygen concentration measured value of oxygen concentration sensor and the fuel injection quantity of motor.
But, in above-mentioned detection engine exhaust there is drawback in the mode of oxygen concentration: oxygen concentration sensor only just can carry out measured oxygen concentration after self being heated to about 700 DEG C, therefore, first preheating (being generally 5 to 10 minutes) will be carried out to oxygen concentration sensor after motor vehicle starting, just can carry out measured oxygen concentration afterwards, measurement setup time is long.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method and system determining the oxygen concentration of engine exhaust, after motor vehicle starting, the oxygen concentration in engine exhaust can be determined fast.
For achieving the above object, the invention provides following technological scheme:
The present invention discloses a kind of method determining the oxygen concentration of engine exhaust, comprising:
Utilize total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine;
Detect enter the air of motor temperature, enter the temperature of the waste gas of motor and enter the temperature of mixed gas of motor;
Utilize the total air-mass flow entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor, calculate the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor;
Utilize formula
calculate the oxygen concentration that current time enters the mixed gas of motor
wherein, m
1for entering the mass flow rate of the air of motor, m
2for entering the mass flow rate of the waste gas of motor, m
3for total air-mass flow of motor,
for the oxygen concentration in air,
computational process first after motor is opened is configured to initial value, is configured to the oxygen concentration of the engine exhaust that the last time calculates in subsequent calculations process;
Utilize formula
the oxygen concentration of calculation engine waste gas
wherein, F is the amount of oxygen fallen by the fuel consume of cylinder injection.
Preferably, utilize total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine, comprising:
Utilize formula m
3=K*N
eng/ 2*V
engtotal air-mass flow m of calculation engine
3, wherein, K is the charging efficiency of motor, N
engfor the rotating speed of motor, V
engfor engine displacement.
Preferably, utilize the total air-mass flow entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor, calculate the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor, comprising:
Utilize formula
calculate the mass flow rate m entering the air of motor
1;
Utilize formula
calculate the mass flow rate m entering the waste gas of motor
2;
Wherein, C
1for the specific heat capacity of air, C
2for the specific heat capacity of waste gas, C
3for entering the specific heat capacity of the mixed gas of motor, T
1for entering the temperature of the air of motor, T
2for entering the temperature of the waste gas of motor, T
3for entering the temperature of the mixed gas of motor.
Preferably, detecting the temperature entering the air of motor is: the temperature detecting the air of the suction tude after being arranged in air-strainer.
Preferably, detecting the temperature entering the waste gas of motor is: the temperature detecting EGR EGR valve outlet port.
The present invention also discloses a kind of system determining the oxygen concentration of engine exhaust, comprises the first temperature transducer, the second temperature transducer, three-temperature sensor and processor;
Described first temperature transducer is for detecting the temperature of the air entering motor;
Described second temperature transducer is for detecting the temperature of the waste gas entering motor;
Described three-temperature sensor is for detecting the temperature of the mixed gas entering motor;
Described processor is connected with described first temperature transducer, the second temperature transducer and three-temperature sensor respectively, and described processor is used for the oxygen concentration of calculation engine waste gas, specifically comprises:
Utilize total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine; Total air-mass flow of the temperature of the temperature utilizing the air of motor, the waste gas entering motor, the temperature entering the mixed gas of motor and motor, calculates the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor; Utilize formula
calculate the oxygen concentration that current time enters the mixed gas of motor
wherein, m
1for entering the mass flow rate of the air of motor, m
2for entering the mass flow rate of the waste gas of motor, m
3for total air-mass flow of motor,
for the oxygen concentration in air,
computational process first after motor is opened is configured to initial value, is configured to the oxygen concentration of the engine exhaust that the last time calculates in subsequent calculations process; Utilize formula
the oxygen concentration of calculation engine waste gas
wherein, F is the amount of oxygen fallen by the fuel consume of cylinder injection.
Preferably, the detect probe of described first temperature transducer is arranged at the suction tude after being arranged in filter cleaner.
Preferably, the detect probe of described second temperature transducer is arranged at the outlet port of EGR exhaust gas recirculation valve.
Preferably, the detect probe of described three-temperature sensor is arranged at the suction port place of described motor.
Preferably, described first temperature transducer, the second temperature transducer and three-temperature sensor are thermistor temperature sensor.
As can be seen here, beneficial effect of the present invention is:
The method determining the oxygen concentration of engine exhaust disclosed by the invention, first total air-mass flow of the discharge capacity account motor of the charging efficiency of motor, the rotating speed of motor and motor is utilized, utilize afterwards the total mass air flow meter entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor add into the air of motor mass flow rate and enter the mass flow rate of waste gas of motor, just can determine the oxygen concentration of engine exhaust afterwards based on aforementioned data.The method determining the oxygen concentration of engine exhaust disclosed by the invention, the detection data used only comprise three temperature values, because temperature transducer can carry out temperature detection at any time, therefore based on method disclosed by the invention, the oxygen concentration in engine exhaust can be determined after the start of engine fast.In addition, because temperature transducer is very low for the receptance of variations in flow, even if air-flow instability still can accurate detected temperatures, therefore, method disclosed by the invention is very low to the receptance of pipeline structure, thus can reduce the requirement to engine pipelines layout.
The system determining the oxygen concentration of engine exhaust disclosed by the invention, by three temperature transducers detect enter the air of motor temperature, enter the temperature of the waste gas of motor, enter the temperature of the mixed gas of motor, processor utilizes total air-mass flow of the discharge capacity account motor of the charging efficiency of motor, the rotating speed of motor and motor, detects that total air-mass flow of temperature value and motor just can determine the oxygen concentration of engine exhaust afterwards based on three temperature transducers.The system determining the oxygen concentration of engine exhaust disclosed by the invention, the detection data used only comprise three temperature values, because temperature transducer can carry out temperature detection at any time, therefore based on system disclosed by the invention, the oxygen concentration in engine exhaust can be determined after the start of engine fast.In addition, because temperature transducer is very low for the receptance of variations in flow, even if air-flow instability still can accurate detected temperatures, therefore, system disclosed by the invention is very low to the receptance of pipeline structure, thus can reduce the requirement to engine pipelines layout.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is a kind of flow chart determining the method for the oxygen concentration of engine exhaust disclosed by the invention;
Fig. 2 is a kind of structural representation determining the system of the oxygen concentration of engine exhaust disclosed by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The present invention discloses a kind of method determining oxygen concentration in engine exhaust, can determine the oxygen concentration in engine exhaust based on the method after motor vehicle starting fast.
Be a kind of flow chart determining the method for the oxygen concentration of engine exhaust disclosed by the invention see Fig. 1, Fig. 1.The method comprises:
Step S1: the total air-mass flow utilizing the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine.
The vehicle control unit controls EGR valve (can be solenoid valve) of Motor Vehicle is opened, and adjust the aperture of EGR valve, a part for the waste gas that motor is discharged can enter in the air inlet pipeline of motor again, therefore, the gas entering motor had both comprised ozone and had also comprised portion.
In enforcement, total air-mass flow of formula 1 calculation engine can be utilized.
M
3=K*N
eng/ 2*V
eng(formula 1)
Wherein, m
3for total air-mass flow of motor, K is the charging efficiency of motor, N
engfor the rotating speed of motor, V
engfor engine displacement.
Step S2: detect enter the air of motor temperature, enter the temperature of the waste gas of motor and enter the temperature of mixed gas of motor.
The air inlet pipeline of motor arranges three temperature transducers, one of them temperature transducer is for detecting the temperature of the air entering motor, another temperature transducer is for detecting the temperature of the waste gas entering motor, and the 3rd temperature transducer is for detecting the temperature of the mixed gas entering motor.
Step S3: the mass flow rate calculating the mass flow rate entering the air of motor and the waste gas entering motor.
In enforcement, utilize the total air-mass flow entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor, calculate the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor.
Formula 2 can be obtained according to principle of heat balance:
C
1* m
1* T
1+ C
2* m
2* T
2=C
3* m
3* T
3(formula 2)
Wherein:
C
1for the specific heat capacity of air; m
1for entering the mass flow rate of the air of motor; T
1for entering the temperature of the air of motor; C
2for the specific heat capacity of waste gas; m
2for entering the mass flow rate of the waste gas of motor; T
2for entering the temperature of the waste gas of motor; C
3for entering the specific heat capacity of the mixed gas of motor; m
3for total air-mass flow of motor; T
3for entering the temperature of the mixed gas of motor.
In addition, formula 3 can be obtained according to the principle of mass conservation:
M
1+ m
2=m
3(formula 3)
According to formula 1, formula 2 and formula 3, the mass flow rate m of the air entering motor can be calculated
1with the mass flow rate m of waste gas entering motor
2, concrete:
Step S4: calculate the oxygen concentration that current time enters the mixed gas of motor.
In enforcement, utilize formula 4 to calculate oxygen concentration that current time enters the mixed gas of motor.
Wherein,
the oxygen concentration of the mixed gas of motor is entered, m for current time
1for entering the mass flow rate of the air of motor, m
2for entering the mass flow rate of the waste gas of motor, m
3for total air-mass flow of motor,
for the oxygen concentration in air,
be configured to initial value in computational process first after motor is opened, be configured to the oxygen concentration of the engine exhaust that the last time calculates in subsequent calculations process.
Here in formula 4
value be described in detail:
After motor is opened, if first time performs the operation determining oxygen concentration in engine exhaust, that is first time performs step S4, then will
be configured to initial value, this initial value can be the oxygen concentration of air.If after motor is opened i-th time (i be greater than 1 integer) perform step S4, then in i-th computational process
be configured to the oxygen concentration of the engine exhaust calculated for the i-th-1 time.That is, use in step S4
it is successive iteration.
Step S5: the oxygen concentration of calculation engine waste gas.
In enforcement, utilize the oxygen concentration of formula 5 calculation engine waste gas:
Wherein,
for the oxygen concentration of engine exhaust, F is the amount of oxygen fallen by the fuel consume of cylinder injection, is a calibration value.
The method determining the oxygen concentration of engine exhaust disclosed by the invention, first total air-mass flow of the discharge capacity account motor of the charging efficiency of motor, the rotating speed of motor and motor is utilized, utilize afterwards the total mass air flow meter entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor add into the air of motor mass flow rate and enter the mass flow rate of waste gas of motor, just can determine the oxygen concentration of engine exhaust afterwards based on aforementioned data.The method determining the oxygen concentration of engine exhaust disclosed by the invention, the detection data used only comprise three temperature values, because temperature transducer can carry out temperature detection at any time, therefore based on method disclosed by the invention, the oxygen concentration in engine exhaust can be determined after the start of engine fast.In addition, because temperature transducer is very low for the receptance of variations in flow, even if air-flow instability still can accurate detected temperatures, therefore, method disclosed by the invention is very low to the receptance of pipeline structure, thus can reduce the requirement to engine pipelines layout.
Preferably, detect the temperature entering the air of motor can be configured to: the temperature detecting the air of the suction tude after being arranged in air-strainer.Air-strainer is arranged on the air inlet pipeline of motor, for filtering the air entering motor.
In addition, detect the temperature entering the waste gas of motor can be configured to: the temperature detecting EGR EGR valve outlet port.
The present invention also discloses a kind of system determining the oxygen concentration of engine exhaust, and its structure as shown in Figure 2, comprising: the first temperature transducer 100, second temperature transducer 200, three-temperature sensor 300 and processor 400.
Wherein:
First temperature transducer 100 is for detecting the temperature of the air entering motor.
Second temperature transducer 200 is for detecting the temperature of the waste gas entering motor.
Three-temperature sensor 300 is for detecting the temperature of the mixed gas entering motor.
Processor 400 is connected with the first temperature transducer 100, second temperature transducer 200 and three-temperature sensor 300 respectively, processor 400 is for the oxygen concentration of calculation engine waste gas, here carry out brief description to computational process, other are not addressed part and refer to description above:
Processor 400 utilizes total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine.Afterwards, total air-mass flow that processor 400 utilizes the temperature of the air of motor, enters the temperature of the waste gas of motor, enters the temperature of the mixed gas of motor and motor, calculates the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor.Afterwards, processor 400 utilize formula 4 to calculate oxygen concentration that current time enters the mixed gas of motor
wherein,
computational process first after motor is opened is configured to initial value, is configured to the oxygen concentration of the engine exhaust that the last time calculates in subsequent calculations process.Afterwards, processor 400 utilizes the oxygen concentration of formula 5 calculation engine waste gas
The system determining the oxygen concentration of engine exhaust disclosed by the invention, by three temperature transducers detect enter the air of motor temperature, enter the temperature of the waste gas of motor, enter the temperature of the mixed gas of motor, processor utilizes total air-mass flow of the discharge capacity account motor of the charging efficiency of motor, the rotating speed of motor and motor, detects that total air-mass flow of temperature value and motor just can determine the oxygen concentration of engine exhaust afterwards based on three temperature transducers.The system determining the oxygen concentration of engine exhaust disclosed by the invention, the detection data used only comprise three temperature values, because temperature transducer can carry out temperature detection at any time, therefore based on system disclosed by the invention, the oxygen concentration in engine exhaust can be determined after the start of engine fast.In addition, because temperature transducer is very low for the receptance of variations in flow, even if air-flow instability still can accurate detected temperatures, therefore, system disclosed by the invention is very low to the receptance of pipeline structure, thus can reduce the requirement to engine pipelines layout.
In enforcement, processor 400 can utilize total air-mass flow of formula 1 calculation engine.
In addition, processor 400 can utilize formula
calculate the mass flow rate m entering the air of motor
1, utilize formula
calculate the mass flow rate m entering the waste gas of motor
2.
Preferably, the detect probe of the first temperature transducer 100 is arranged at the suction tude after being arranged in filter cleaner, to detect the temperature entering the air of motor more exactly.
In addition, as a kind of preferred version, the detect probe of the second temperature transducer 200 can be arranged at the outlet port of EGR valve, to detect the temperature entering the waste gas of motor more exactly.
In addition, as a kind of preferred version, the detect probe of three-temperature sensor 300 can be arranged at the suction port place of motor, to detect the temperature entering the mixed gas of motor more exactly.
In enforcement, the first temperature transducer 100, second temperature transducer 200 and three-temperature sensor 300 preferably can use thermistor temperature sensor.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. determine a method for the oxygen concentration of engine exhaust, it is characterized in that, described method comprises:
Utilize total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine;
Detect enter the air of motor temperature, enter the temperature of the waste gas of motor and enter the temperature of mixed gas of motor;
Utilize the total air-mass flow entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor, calculate the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor;
Utilize formula
calculate the oxygen concentration that current time enters the mixed gas of motor
wherein, m
1for entering the mass flow rate of the air of motor, m
2for entering the mass flow rate of the waste gas of motor, m
3for total air-mass flow of motor,
for the oxygen concentration in air,
computational process first after motor is opened is configured to initial value, is configured to the oxygen concentration of the engine exhaust that the last time calculates in subsequent calculations process;
Utilize formula
the oxygen concentration of calculation engine waste gas
wherein, F is the amount of oxygen fallen by the fuel consume of cylinder injection.
2. method according to claim 1, is characterized in that, utilizes total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine, comprising:
Utilize formula m
3=K*N
eng/ 2*V
engtotal air-mass flow m of calculation engine
3, wherein, K is the charging efficiency of motor, N
engfor the rotating speed of motor, V
engfor engine displacement.
3. method according to claim 1 and 2, it is characterized in that, utilize the total air-mass flow entering the temperature of the air of motor, the temperature entering the waste gas of motor, the temperature entering the mixed gas of motor and motor, calculate the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor, comprising:
Utilize formula
calculate the mass flow rate m entering the air of motor
1;
Utilize formula
calculate the mass flow rate m entering the waste gas of motor
2;
Wherein, C
1for the specific heat capacity of air, C
2for the specific heat capacity of waste gas, C
3for entering the specific heat capacity of the mixed gas of motor, T
1for entering the temperature of the air of motor, T
2for entering the temperature of the waste gas of motor, T
3for entering the temperature of the mixed gas of motor.
4. method according to claim 3, is characterized in that, detects the temperature entering the air of motor to be: the temperature detecting the air of the suction tude after being arranged in air-strainer.
5. method according to claim 4, is characterized in that, detects the temperature entering the waste gas of motor to be: the temperature detecting EGR EGR valve outlet port.
6. determine a system for the oxygen concentration of engine exhaust, it is characterized in that, comprise the first temperature transducer, the second temperature transducer, three-temperature sensor and processor;
Described first temperature transducer is for detecting the temperature of the air entering motor;
Described second temperature transducer is for detecting the temperature of the waste gas entering motor;
Described three-temperature sensor is for detecting the temperature of the mixed gas entering motor;
Described processor is connected with described first temperature transducer, the second temperature transducer and three-temperature sensor respectively, and described processor is used for the oxygen concentration of calculation engine waste gas, specifically comprises:
Utilize total air-mass flow of the charging efficiency of motor, the rotating speed of motor and engine displacement calculation engine; Total air-mass flow of the temperature of the temperature utilizing the air of motor, the waste gas entering motor, the temperature entering the mixed gas of motor and motor, calculates the mass flow rate of the mass flow rate entering the air of motor and the waste gas entering motor; Utilize formula
calculate the oxygen concentration that current time enters the mixed gas of motor
wherein, m
1for entering the mass flow rate of the air of motor, m
2for entering the mass flow rate of the waste gas of motor, m
3for total air-mass flow of motor,
for the oxygen concentration in air,
computational process first after motor is opened is configured to initial value, is configured to the oxygen concentration of the engine exhaust that the last time calculates in subsequent calculations process; Utilize formula
the oxygen concentration of calculation engine waste gas
wherein, F is the amount of oxygen fallen by the fuel consume of cylinder injection.
7. system according to claim 6, is characterized in that, the detect probe of described first temperature transducer is arranged at the suction tude after being arranged in filter cleaner.
8. the system according to claim 6 or 7, is characterized in that, the detect probe of described second temperature transducer is arranged at the outlet port of EGR exhaust gas recirculation valve.
9. system according to claim 8, is characterized in that, the detect probe of described three-temperature sensor is arranged at the suction port place of described motor.
10. system according to claim 6, is characterized in that, described first temperature transducer, the second temperature transducer and three-temperature sensor are thermistor temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229236.7A CN104895686B (en) | 2015-05-07 | 2015-05-07 | Determine the method and system of the oxygen concentration of engine exhaust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229236.7A CN104895686B (en) | 2015-05-07 | 2015-05-07 | Determine the method and system of the oxygen concentration of engine exhaust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104895686A true CN104895686A (en) | 2015-09-09 |
| CN104895686B CN104895686B (en) | 2018-04-03 |
Family
ID=54028586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510229236.7A Active CN104895686B (en) | 2015-05-07 | 2015-05-07 | Determine the method and system of the oxygen concentration of engine exhaust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104895686B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489552A (en) * | 2016-12-12 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Fuel injection control method, device, system and vehicle |
| CN112648709A (en) * | 2020-12-04 | 2021-04-13 | 中国航空工业集团公司西安航空计算技术研究所 | Automatic oxygen concentration maintaining and controlling device for closed space |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1637254A (en) * | 2003-12-25 | 2005-07-13 | 株式会社电装 | Control device for internal combustion engine |
| JP2005299600A (en) * | 2004-04-15 | 2005-10-27 | Toyota Motor Corp | Fuel supply control device of internal combustion engine |
| JP2007211612A (en) * | 2006-02-07 | 2007-08-23 | Isuzu Motors Ltd | Engine control method and engine control system |
| US20100005872A1 (en) * | 2008-03-04 | 2010-01-14 | Gm Global Technology Operations, Inc. | method for estimating the oxygen concentration in internal combustion engines |
| CN103485908A (en) * | 2012-06-07 | 2014-01-01 | 通用汽车环球科技运作有限责任公司 | Humidity determination and compensation systems and methods using an intake oxygen sensor |
-
2015
- 2015-05-07 CN CN201510229236.7A patent/CN104895686B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1637254A (en) * | 2003-12-25 | 2005-07-13 | 株式会社电装 | Control device for internal combustion engine |
| JP2005299600A (en) * | 2004-04-15 | 2005-10-27 | Toyota Motor Corp | Fuel supply control device of internal combustion engine |
| JP2007211612A (en) * | 2006-02-07 | 2007-08-23 | Isuzu Motors Ltd | Engine control method and engine control system |
| US20100005872A1 (en) * | 2008-03-04 | 2010-01-14 | Gm Global Technology Operations, Inc. | method for estimating the oxygen concentration in internal combustion engines |
| CN103485908A (en) * | 2012-06-07 | 2014-01-01 | 通用汽车环球科技运作有限责任公司 | Humidity determination and compensation systems and methods using an intake oxygen sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489552A (en) * | 2016-12-12 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Fuel injection control method, device, system and vehicle |
| CN107489552B (en) * | 2016-12-12 | 2020-09-18 | 宝沃汽车（中国）有限公司 | Oil injection control method, device and system and vehicle |
| CN112648709A (en) * | 2020-12-04 | 2021-04-13 | 中国航空工业集团公司西安航空计算技术研究所 | Automatic oxygen concentration maintaining and controlling device for closed space |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104895686B (en) | 2018-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10041427B2 (en) | Sensor output value estimation device | |
| CN101387234B (en) | Intake air temperature rationality diagnostic | |
| CN103321755B (en) | The cylinder of internal-combustion engine sucks the estimating device of air quantity and internal EGR rate | |
| CN103321756B (en) | The cylinder of internal-combustion engine sucks air quantity estimating device | |
| CN109209688A (en) | Exhaust gas flow measuring system, measurement method and closed loop control method | |
| CN105736206B (en) | The online test method and device of circulating fuel injection quantity under a kind of engine variable working condition | |
| US20100332075A1 (en) | Condensation detection systems and methods | |
| JP6146192B2 (en) | Diagnostic equipment | |
| CN101555839A (en) | A method for estimating the oxygen concentration in internal combustion engines | |
| CN110671238B (en) | EGR waste gas flow measuring method and EGR system of gas engine | |
| US7174250B2 (en) | Method for determining an exhaust gas recirculation quantity for an internal combustion engine provided with exhaust gas recirculation | |
| CN109139207A (en) | The control device and control method of internal combustion engine | |
| CN104564359B (en) | Internal combustion engine control apparatus | |
| RU2698225C2 (en) | Internal combustion engine, in particular a gas engine, for a vehicle, in particular for an industrial vehicle | |
| CN104279068A (en) | Internal combustion engine control apparatus | |
| CN108571391A (en) | The control device and control method of internal combustion engine | |
| JP2007205339A (en) | State quantity estimation device of turbocharger | |
| CN102235218A (en) | Control system and method for controlling engine exhaust back pressure | |
| WO2021057444A1 (en) | Method for quickly calibrating scr ammonia ratio factor of diesel engine | |
| CN112380498A (en) | Algorithm for judging reasonability of urea injection amount of commercial diesel vehicle | |
| CN104895686A (en) | Method and system for determining oxygen concentration of exhaust gas of engine | |
| CN101187341A (en) | Air amount computing unit and fuel control unit of internal combustion engine | |
| JP2003293821A (en) | Controller for internal combustion engine | |
| CN105683547A (en) | System and method for estimating the flow of nitrogen oxides in the exhaust gases of an internal combustion engine for a motor vehicle | |
| CN105464820B (en) | Engine charge metering units and engine system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |