TWI608950B - Method and system for judging different ratio of bio-diesel to diesel - Google Patents

Description

Processing method and system for judging ratio of different biomass diesel

The invention relates to a method and a system for judging diesel fuel, in particular to a processing method and system for judging the proportion of different biodiesel.

With the advancement of science and technology, the transportation industry is booming. No matter whether government units or private enterprises spare no effort in the research of vehicle power, the development projects include: First, energy conservation and carbon reduction, that is, low pollution and low energy consumption; New energy and energy saving technology. In terms of current energy-saving and carbon-reducing projects, there are already mature electric vehicle technologies, and the use of electric vehicles does have the advantages of low pollution and low energy consumption. However, electric vehicle technology still has its limitations, which is limited by The performance of the generator module is not as good as that of the general engine, and the battery technology of the electric vehicle makes its endurance limited. In the development of new energy and energy-saving technologies, the current technology is more in line with engine performance and energy saving. Carbon demand.

At present, there are related researches on the control technology of the engine using biodiesel. The physical and chemical properties of biodiesel are very similar to those of fossil diesel, and can be directly mixed with fossil diesel. The proportion of the mixture can be from B2 biodiesel. Adding 2% biodiesel) or even B100 biodiesel. Compared with fossil diesel, biodiesel has the characteristics of high oxygen content and low calorific value. If it is mixed with fossil diesel. When applied, it will affect the engine performance due to the above characteristics, but the higher the proportion of biodiesel, the less pollutants will be emitted. Because biodiesel has the benefits of carbon reduction and decentralized energy, it has become the current global biomass energy promotion. The trend and trend, while some countries promote the biodiesel policy, it is not mandatory to use the same proportion of biodiesel in a comprehensive and uniform manner. Therefore, different proportions of biodiesel may be sold in the market.

The existing technology for judging the proportion of biodiesel and performing engine control adjustments include: 1. Using cylinder pressure values for analysis, this technique must be measured using a cylinder pressure sensor, which is expensive; 2. Use fuel injection calculations, generally The fuel injection adjustment of the diesel engine is first controlled according to the preset value of the Torque-Speed Map, and the fuel injection amount is used as the correction parameter, but in fact, the control logic is very complicated and the manufacturing cost is high. It is not easy to maintain; 3. It is estimated by measuring the relative dielectric constant value, but there is still no low-cost, high-performance vehicle-specific dielectric constant sensor on the market; and it is also based on the Chinese patent CN102787924 Method for detecting biodiesel blending" (hereinafter referred to as the previous case), which discloses a method for detecting a mixing ratio of biofuels in an internal combustion engine, the method comprising the steps of: setting at least two post-injection fuel amount reference values for respectively a known percentage ratio of biodiesel blending; a value of the amount of injected fuel after evaluation; a value of the post-injected fuel amount and the at least two The reference value of the amount of post-injection fuel is compared; a set of predetermined correlation values between the value of the post-injection fuel amount and the biodiesel blend ratio expressed by the percentage of biodiesel relative to the petrodiesel is used to determine biodiesel blending proportion.

It can be seen from the above prior art that when mixed with biodiesel and fossil diesel, engine performance may be affected by the characteristics and proportion of biodiesel, for example, in evaluating the steady state of B2 biodiesel engine and B100 biodiesel engine ( Steady-State performance, if the same biodiesel fuel is used, the engine using B100 biodiesel will have a horsepower drop of about 6.9% at an average speed of about 1800 rpm. Therefore, in the prior art, the higher the ratio of biodiesel is, the lower the performance of the engine is. In the previous case, the amount of fuel injected from the engine is used to judge the proportion of biodiesel, and the amount of spray will be different according to the fuel characteristics to judge the biodiesel. Proportion, but the previous case requires complex logic control to obtain accurate fuel injection, so that the correct ratio of raw diesel can be accurately derived, making the manufacturing cost of this method high and difficult to maintain; therefore, the prior art does not need to be proposed. The need for better improvements.

In view of the above-mentioned deficiencies of the prior art, the main object of the present invention is to provide a processing method and system for judging the ratio of different biomass diesels, and to establish sample materials of various biodiesel ratios in a vehicle computer by means of high efficiency, so that the factory is manufactured. After the vehicle is only required to automatically adjust the engine fuel injection strategy according to the relevant reading value of the biodiesel, the engine performance, energy saving and carbon reduction can be improved in a low cost and high efficiency manner.

The main technical means adopted to achieve the above objectives is to make the above-mentioned method for judging the ratio of different biodiesel to be mainly connected to a nitrogen oxide sensor through a vehicle computer, and the following steps are performed by the vehicle computer: When performing an operation mode: pre-establishing more than one proportional relationship data according to different ratios of nitrogen oxides; when performing a driving mode: obtaining more than one state information and one nitrogen oxide information; according to the state information and the nitrogen oxide The proportional relationship of the material information generates a concentration information; the concentration information is compared with the pre-established proportional relationship data, and an engine fuel injection strategy is performed according to the comparison result.

In the foregoing method, the NOx sensor is connected to the vehicle computer, and the NOx sensor is used for detecting a plurality of different biodiesel to obtain relevant information, and when the vehicle is not in the factory, the operation mode is performed. Therefore, the vehicle computer detects more than one proportion of nitrogen oxides according to the nitrogen oxide sensor, and establishes more than one proportional relationship data in advance, so when the vehicle is shipped, when using different biodiesel, the vehicle is used. The computer generates corresponding concentration information according to the state information obtained in real time and the proportional relationship of the nitrogen oxide information, and uses the concentration information to compare with the pre-established proportional relationship data of the vehicle before leaving the factory, and then according to the The comparison engine performs the adjustment engine fuel injection strategy to achieve the purpose of improving engine performance and saving energy and reducing carbon in a low-cost and high-efficiency manner.

Another major technical means for achieving the above objectives is to cause the aforementioned treatment system for determining the ratio of different biodiesel to include: a nitrogen oxide sensor for detecting biodiesel and obtaining an information of nitrogen oxides; A vehicle computer is connected to the nitrogen oxide sensor, and the vehicle computer has more than one pre-established proportional relationship data, and the ratio relationship data includes most different proportions of biodiesel information and nitrogen oxide information. The vehicle computer receives the nitrogen oxide information through the nitrogen oxide sensor and the vehicle computer receives more than one status information, and the state information is proportional to the nitrogen oxide information. The calculation formula is used to generate a concentration information, and the vehicle computer compares the concentration information with the pre-established proportional relationship data to determine the proportion of the birth quality diesel oil, and performs an adjustment engine fuel injection strategy according to the judgment result.

It can be seen from the above configuration that the processing system for determining the ratio of different biomass diesels is mainly that the nitrogen oxide sensor detects the raw diesel oil and obtains relevant nitrogen oxide information, and provides the information to the vehicle. The computer processes and detects a variety of different biodiesel through the NOx sensor before the vehicle is shipped from the factory, so that the vehicle computer pre-builds and stores the proportional relationship data through engine testing and different ratios of nitrogen oxides. The ratio information includes most different proportions of biodiesel information and nitrogen oxides information. When the vehicle leaves the factory and uses different biodiesel, the vehicle computer also receives the status information of the vehicle and the sense of nitrogen oxides. The detector receives the nitrogen oxide information and calculates a relationship between the state information and the nitrogen oxide information to generate the concentration information, and the vehicle computer uses the concentration information according to the concentration information and the pre-established proportional relationship data. Make a comparison to determine the proportion of the birth quality diesel, and adjust the engine fuel injection strategy according to the judgment result, so low cost and high Way to achieve rate and improve engine performance and may be carbon reduction purposes.

10‧‧‧Car computer

11‧‧‧ Processor

12‧‧‧ memory unit

13‧‧‧Signal input埠

20‧‧‧Nitrogen Oxide Sensor

30‧‧‧Engine module

40‧‧‧ throttle control module

50,60‧‧‧Biodiesel

1 is a block diagram of a system in accordance with a preferred embodiment of the present invention.

2 is a schematic diagram of an application state of a preferred embodiment of the present invention.

3 is a graph showing a proportional relationship data according to a preferred embodiment of the present invention.

4 is a flow chart of a processing method in accordance with a preferred embodiment of the present invention.

For a preferred embodiment of the processing system for determining the ratio of different biomass diesels in the present invention, please refer to FIG. 1 , which includes a vehicle computer 10 , a nitrogen oxide sensor 20 , and the vehicle 10 system and The NOx sensor 20 is connected to the NOx sensor 20 for detecting different proportions of biodiesel and obtaining a nitrogen oxide information; the Nitrogen Oxides (NOx) means A compound consisting of two elements, nitrogen and oxygen.

In this embodiment, the vehicular computer 10 includes a processor 11, a memory unit 12, and a signal input port 13. The processor 11 is connected to the memory unit 12 and the signal input port 13, respectively. The 13-series is connected to the NOx sensor 20, and the NOx sensor 20 detects different ratios of biodiesel and transmits the obtained NOx information through the signal input 埠13 of the vehicular computer 10. Processing is performed to the processor 11.

The processor 11 of the computer 10 of the vehicle 10 pre-establishes more than one proportional relationship data according to the information that the nitrogen oxide sensor 20 receives different nitrogen oxides, and stores the proportional relationship data in the vehicle. In the memory unit 12 of the computer 10, the proportional relationship data includes most different proportions of biodiesel information and nitrogen oxide information; when the pre-established proportional relationship data is stored in the vehicle computer 10, if the use is different The ratio of the biomass diesel only needs to obtain more than one state information from the processor 11 of the computer 10 and obtain an NOx information through the NOx sensor 20, and then oxidize the state information with the nitrogen. The material information performs a proportional relationship calculation method, and generates a concentration information according to the state information and the proportional relationship of the nitrogen oxide information, and the processor 11 uses the concentration information according to the pre-established ratio The relationship data is compared to determine the proportion of the birth quality diesel in an instant, and the engine fuel injection strategy is effectively executed according to the judgment result, so that the engine performance can be improved and the energy saving and carbon reduction can be achieved in a low cost and high efficiency manner. the goal of.

To illustrate the specific application mode of the preferred embodiment, please refer to FIG. 2, which includes a vehicle factory stage and a vehicle factory stage. The vehicle factory stage refers to a vehicle operating mode test for each project before it leaves the factory. (such as engine test), the vehicle leaving the factory means that the vehicle has been tested, and the general person can perform a driving mode (such as driving on a general road and refueling at the gas station). In this embodiment, the vehicle computer 10 and The NOx sensor 20 is disposed on the vehicle. The vehicle has an engine module 30 and a throttle control module 40. The vehicular computer 10 is respectively associated with the engine module 30 and the throttle control module. The vehicle 10 can receive the status information of the engine module 30 and the status information of the throttle control module 40. The status information of the engine module 30 includes a speed information and a load information. The status information of the control module 40 includes an accelerator opening degree information; when the vehicle is not shipped and is in an operating mode at the depot stage, the vehicle computer 10 transmits the NOx sensor 20 A plurality of different proportions of the biodiesel 50 are detected. In this embodiment, the plurality of different proportions of the biodiesel 50 include D100 (B0), B20, B40, B60, B80, and B100, so that the processor 11 of the vehicle computer 10 can be The above proportional relationship data is pre-established through testing of engine speed, throttle opening and load, and different ratios of nitrogen oxides, and stored in the memory unit 12 of the vehicle computer 10, which includes most different proportions of biomass. Diesel information, nitrogen oxides information; when the vehicle is in the factory stage and the driving mode is executed by the driver, the vehicle is driven to the gas station and a certain proportion of biodiesel 60 is added. When the vehicle starts and runs, the vehicle is used. The computer 10 receives the status information of the vehicle and receives the nitrogen oxide information through the NOx sensor 20, and extracts the status information (such as the rotational speed and the load) and the NOx information. The calculation formula of the system is used to generate the concentration information. In this embodiment, the vehicle computer 10 can obtain a plurality of NOx information under a fixed load or an accelerator opening degree and an average speed (for example, 10 NOx NOx information). And the processor 11 of the vehicle computer 10 compares the concentration information with the pre-established proportional relationship data, and brings the calculation formula with the proportional relationship to determine the proportion of the birth quality diesel oil, and according to the judgment result The fuel injection control signal is sent to the engine module 30 by the processor 11 of the vehicle computer 10 to perform engine fuel injection control strategy adjustment (such as adjusting injection timing and fuel injection amount), and further passing the vehicle. The processor 11 of the computer 10 continuously sends an operation control signal to the engine module 30 to optimize the operation of the engine. When the engine is turned off and the engine is set back, the system has low cost and high efficiency. Advantages and can achieve the purpose of improving engine performance and saving energy and reducing carbon.

To illustrate the relationship between the proportional relationship data and the calculation formula, please refer to FIG. 3, which includes a horizontal axis and a vertical axis. The horizontal axis is the above-mentioned plurality of different proportions of the biodiesel 50, which are sequentially arranged as B100. , B80, B60, B40, B20, B0, the vertical axis is a total amount of NOx (0~700ppm), which is tested by the engine and establishes the ratio of diesel to NOx at different fixed speeds, throttle opening or load. The relationship data, as shown in FIG. 3, when the vehicle is in the vehicle factory stage, the vehicle computer 10 establishes proportional relationship data according to the engine speed of the engine module 30 that is most frequently operated, for example, most of the speed information includes 1500 rpm, 1800 rpm, 2100 rpm, The throttle opening information is 50%~60%. When the vehicle is in the factory stage, and the vehicle computer 10 obtains the speed information as 1500 rpm and the throttle opening information is 60%, respectively, multiple nitrogen oxides are taken. The information is averaged, and the processor 11 of the vehicle computer 10 performs the proportional calculation formula to generate concentration information, and the concentration information is compared with the pre-established proportional relationship data, and the The calculation formula to determine the ratio between the proportion of biodiesel is born, and performs an adjustment engine injection strategy in accordance with the determination result.

In this embodiment, according to the state information and the nitrogen oxide information, a calculation formula having a proportional relationship may be performed, and the calculation formula may be a linear function y = A m + b ; wherein y is the concentration of nitrogen oxides NOx Information, m is the throttle opening information, when the speed information is 2600 rpm, the throttle opening information is 100%, A is 8.7904, and b is 155.4. The calculation formula may further be a polynomial function y = A m ² + bm + c ; wherein y is the concentration information of the nitrogen oxides NOx, and m is the throttle opening information. When the speed information is 1500 rpm, the throttle opening information is 60%, A is 1.75, b is -47.279, c is 830.6; when the speed information is 1800 rpm, the throttle opening information is 60%, A is 8.4643, b is - 92.336, c is 702.8; when the speed information is 2100 rpm, the throttle opening information is 60%, A is 9.4643, b is -99.307, and c is 720.2.

According to the application mode and the exemplary embodiment of the preferred embodiment of the present invention, a processing method for determining the ratio of different biodiesel is further provided. As shown in FIG. 4, the vehicle 10 and the NOx sensor 20 are mainly transmitted through the vehicle. Connected, and the vehicle computer 10 performs the following steps: when the vehicle performs an operation mode at a depot stage (S41): according to the NOx sensor 20 detecting different ratios of nitrogen oxides, more than one is established in advance. Proportional relationship data (S42); when the vehicle performs a driving mode at the factory stage (S51): when the vehicle starts driving, the vehicle computer 10 obtains more than one status information through its engine module 30 and throttle control module 40. Obtaining an NOx information through the NOx sensor 20 (S52); generating a concentration information (S53) according to the state information and the proportional relationship of the NOx information, in this embodiment, according to the status information, the information for the nitrogen oxides is calculated with a formula proportional relationship, the calculation formula may be linear function y = a m + b or a polynomial function ^{y = a m 2 + bm +} c; wherein, y is The concentration information of the oxide NOx, m is the throttle opening information; the concentration information is compared with the pre-established proportional relationship data (S54), and the above-mentioned proportional calculation formula is taken to determine the proportion of the birth quality diesel. And transmitting an injection control signal to the engine module 30 according to the comparison result to execute an adjustment engine fuel injection strategy (S55); continuously transmitting an operation control to the engine module 30 through the processor 11 of the vehicle computer 10. The signal is used to optimize the operation of the engine (S56); when the engine is turned off (S57) and the factory setting is returned, the process returns to the "When performing a driving mode (S51)" step.

The invention can adjust the engine fuel injection strategy by judging the ratio of different biodiesel by the vehicle computer 10, and can generate the corresponding concentration information according to the instantaneously obtained state information and the proportional relationship of the nitrogen oxide information after the vehicle leaves the factory. And using the concentration information to compare with the pre-established proportional relationship data of the vehicle before leaving the factory, and then performing the adjustment engine fuel injection strategy according to the comparison result, and continuing the engine module 30 through the vehicle computer 10 Sending a run control signal optimizes the engine.

10‧‧‧Car computer

11‧‧‧ Processor

12‧‧‧ memory unit

13‧‧‧Signal input埠

20‧‧‧Nitrogen Oxide Sensor

Claims (7)

A method for judging the ratio of different biomass diesels is mainly connected to a nitrogen oxide sensor through a vehicle computer, and the vehicle computer performs the following steps: when performing an operation mode: according to different nitrogen oxides Proportion, pre-establishing more than one proportional relationship data; when performing a driving mode: obtaining more than one status information and an NOx information; and based on the status information and the proportional relationship of the NOx information, and based on the status information, The NOx information is subjected to a proportional relationship calculation to generate a concentration information; wherein the calculation formula can be a linear function or a polynomial function, the linear function is y = A m + b , and the polynomial function is y =A m ² + bm + c ; where y is the concentration information of nitrogen oxides NOx, m is the throttle opening information; using the concentration information to compare with the pre-established proportional relationship data, and performing a comparison according to the comparison result Adjust the engine fuel injection strategy. The method for determining the ratio of different biomass diesels as described in claim 1, when the method is executed to compare the concentration information with the pre-established proportional relationship data, and performing an adjustment engine fuel injection strategy step according to the comparison result. The method further includes the steps of: introducing the above-mentioned proportional calculation formula to determine the proportion of the birth quality diesel, and transmitting an injection control signal to an engine module according to the comparison result to perform an adjustment engine injection strategy. The method for determining the ratio of different biomass diesels as claimed in claim 1 or 2, when the method performs a driving mode, further comprising the steps of: continuously transmitting an operation control signal to an engine module to optimize the engine. Operation; when the flame is turned off, return to the step of performing a driving mode. A processing system for determining the ratio of different biomass diesels, comprising: a nitrogen oxide sensor for detecting raw diesel and obtaining a nitrogen oxide information; a vehicle computer, and the nitrogen oxide The vehicle is connected to the vehicle, and the vehicle computer has a pre-established relationship data of more than one proportion, and the proportional relationship data includes most different proportions of biodiesel information and nitrogen oxide information; wherein the vehicle computer system is oxidized by the nitrogen Receiving the NOx information and the vehicle computer receiving more than one status information, and performing a proportional relationship between the status information and the NOx information to generate a concentration information; wherein The calculation formula can be a linear function or a polynomial function, the linear function is y = A m + b , and the polynomial function is y = A m ² + bm + c ; wherein y is the concentration information of the nitrogen oxides NOx, m is the throttle opening information; and the vehicle computer compares the concentration information with the pre-established proportional relationship data to determine the proportion of the birth quality diesel, and according to the judgment result An adjusting engine fuel injection strategy. The processing system for determining the ratio of different biomass diesels as described in claim 4, the vehicle computer comprising a processor, a memory unit and a signal input port, wherein the processor is respectively connected to the memory unit and the signal input port The signal input system is connected to the NOx sensor. The processing system for determining the ratio of different biomass diesels according to claim 5, wherein the vehicle computer and the nitrogen oxide sensor are disposed on a vehicle, the vehicle having an engine module and a throttle control module The vehicle computer system is respectively connected to the engine module and the throttle control module, and the vehicle computer respectively receives status information of the engine module and status information of the throttle control module. The processing system for determining the ratio of different biomass diesels according to claim 6, wherein the status information of the engine module comprises a speed information and a load information, and the state information of the throttle control module includes an accelerator opening information.