TWI343447B - Engine control apparatus - Google Patents

Description

J4J44/ Ψ Nine, invention description: [Technical field of the invention] The present invention relates to an engine control device, a vehicle using a small-capacity battery, or a vehicle that is not used: In the method of: [...] using a bio-alcohol (Bioethaiioi) and other plants containing @ Μ & The fuel of M 3 / (4) can also be effectively used. [Prior Art] In recent years, in addition to gasoline fuel, an elastic fuel vehicle that can travel with alcohol-containing T (4)::] =: =

Vehicle) has been used. It is necessary to correct the fuel injection amount by maintaining the engine's 1 revolution speed with various fuels. It has been proposed to calculate the correction coefficient based on the air-fuel ratio of the exhaust gas, and to correct the coefficient of the second-fuel ratio feedback correction coefficient ^ fine/time, and to use the estimated alcohol concentration. Correction of the fuel injection amount by the bypass coefficient /, Benin 1). This method is to predict the alcoholic households that have been presumed. Refer to the (four) times of alcohol concentration before the calculation of the patent literature. m 'thinking degree of fuel injection amount is supplemented [Patent Document 丨] 曰 Patent No. 3903925 [Invention Summary] (The problem to be solved by the invention) h: As described above, the correction of the conventional fuel injection amount In the method, a vehicle that uses a small-capacity battery, such as a motor vehicle, or an unused battery

(S 320066 5 1343447 Ϊ = 车辆 In the vehicle using the backup memory, since it is impossible to memorize the fixed value = degree in the backup memory, it is necessary to push the indifference of the alcohol - binary memory. There is a possibility that the non-volatile memory has an exchanging 'more than the upper limit of the number of non-volatile memory swaps:: Exceeding the upper limit of the number of non-volatile memory swaps = the refined concentration is estimated, fuel injection is not possible Correction of the quantity, the problem of the phenomenon that the θ is too rich (too thin) is generated. ... and then because the feedback correction coefficient is not initialized in the alcohol concentration estimation, it is added to the injection (four). Point.) The method of re-compensation, and the existence of an excessively rich (excessively thin) phenomenon, is developed by the developer in order to solve the above-mentioned problems, and the purpose is not to exceed the upper limit of the number of writes of the non-volatile memory. When the 1st concentration estimation value is memorized to the non-volatile memory, the limit is set to reduce the number of times the non-volatile memory is exchanged, and the upper limit of the number of times of the volatile memory is not more than the non-device. It can prevent excessive (excessive) production. "Getting the engine control" In addition, the present invention has been developed to solve the above problems, and the target is to 'return the correction amount when calculating the alcohol concentration value to obtain the double correction for eliminating the fuel injection amount. An engine control device capable of preventing over-wave (over-lean) generation. (Means for solving the problem) The engine control device of the present invention has a non-volatile memory.

S 320066 6 1343447 used to memorize the estimated alcohol concentration; crank angle sensor to detect the actual rotational speed of the engine; inspiratory pressure sensor to detect the suction air pressure; inhaled 2 degrees j detector to detect the temperature of the inhaled air a throttle position sensor detects an opening of a throttle valve; an engine temperature sensor detects a temperature of the engine; an oxygen concentration sensor detects an oxygen concentration in an exhaust gas of the engine; a jetting module that injects fuel into the engine; and a control unit 'reading the value of the non-volatile memory in the power source 〇N 日寺' as the estimated value of the alcohol concentration, according to the sensor (4) sensor The actual rotational speed of the detected engine, and the intake air pressure detected by the detected intake air pressure sensor to calculate the basic fuel injection amount, according to the intake air detected by the aforementioned intake air temperature sensor The chaotic temperature, the opening of the throttle valve detected by the aforementioned throttle position sensor, and the engine temperature detected by the aforementioned engine temperature sensor Correction coefficient; according to the oxygen concentration produced by the aforementioned oxygen concentration sensor Γί f Γ feed t amount (feed baek(3)1'(10)]·°η is called the actual rotation speed of the engine detected by the ΐ ^ angle sensor And correcting the above-mentioned = by setting the opening of the throttle detected by the sensor === and setting the air-fuel ratio learning coefficient; according to the battery voltage, 'based on the aforementioned correction coefficient, the aforementioned feedback correction amount, front == Learning the correction coefficient and the voltage correction amount to correct the two coarse two: the amount of radiation and calculating the fuel injection amount, and outputting the driving signal corresponding to the calculated :::: to the fuel injection module; ::::疋In the case where the air-fuel ratio learning mode is established, the estimated alcohol concentration is based on the above-mentioned rebate correction summer, and when the calculated alcohol pushes 320066 7 1^43447, the 疋 value and the memory are in the foregoing non- The difference between the estimated values of the alcohol concentration of the volatile memory is • The value of the pair is greater than the predetermined value, and the actual rotational speed of the engine is within the predetermined range, and the estimated value of the alcohol concentration is stored in the aforementioned non-volume, hair [Effect of the Invention] The impact control device of the present invention can reduce the number of times of non-volatile memory exchange, thereby achieving an effect of preventing excessive (excessive dilution). ^ Embodiments 1 In the following, the engine control device according to the first embodiment of the present invention will be described with reference to the first to fourth embodiments. Fig. 1 is a view showing the configuration of the engine control device according to the first embodiment of the present invention. The engine control device according to the embodiment of the present invention is provided with: an intake air temperature sensor 丨 for measuring the intake air temperature of the engine 25; and a throttle valve position sensor 2 for measuring the throttle valve 23; opening degree and air pressure sensor 3 for measuring the suction air pressure downstream of the throttle 23; engine temperature sensor 4 for measuring the wall temperature of the engine 25; crank angle sensor 5 For measuring the crank angle position of the engine 25; oxygen ♦ sensibility measurement 6' is used to check the oxygen concentration in the exhaust gas of the engine 25; the control unit 1〇 has (:1>1;,11〇河' ]^^1, 1/〇 interface, etc.; non-volatile s Body Π 'incorporated in the control unit〗 square. In addition, there are: an air cleaner 21; an intake passage 22; a BC (Idle Speed Contro丨) 24, which feeds back the aforementioned throttle valve 23 (by bypassing the throttle valve) Air; fuel tank %, stored with 320066 8 1343447 gasoline", "Group U, mixed fuel with Γ", "alcohol"; fuel injection mold _ = shot to engine 25; ignition coil ignition plug, drain passage 3 〇; vent gas C0 for purification. Regarding the catalyst, NOx and HC will be described next with reference to the drawings. The operation of the first side = the side of the engine control device of the form (4) The single 2 table is not the first embodiment of the present invention. The third figure is a flow chart of the action of the table spear. The engine control device of the control unit of the control unit represents the 3rd π & private map. In addition, Figure 4 is the third. The flow chart of the feedback correction setting operation of the figure. Early 10 is based on: Inspiratory temperature - Sensor 2, Ugly crescent, grade, J ~ 1, Lang flow valve angle sensor 5, oxygen: 3, engine temperature sensor 4, crank Fuel injection period, fuel injection amount, and will drive two = appropriate various: unit: 0 based on the information from the aforementioned gate: calculate the appropriate ignition timing, power-on time 'and output the drive signal to the ignition Coil 28. When power is turned on First, the control unit of the engine control unit will be described with reference to Fig. 2 . ' "The knife period moves in step S101, the control unit 10 is stored in the non-volatile memory W] and the value of Keep is read and the original ^; =, will be estimated by the value K] rn. Take and sigh for alcohol Next, the control single-fixing operation of the engine control device will be described with reference to Fig. 3.

320066 9 1343447, in step S201, the control unit 10 is based on the actual rotational speed Ne of the engine 25 detected by the crank angle sensor 5, and the intake air pressure Pb detected by the intake pressure-sensor 3 The basic fuel injection amount Ti is calculated by distributing TINJMAP, (Ne, Pb). That is, the basic fuel injection amount is set in accordance with Ti = TINJMAP (Ne, Pb). Next, in step S202, the control unit 10 is based on the temperature of the intake air detected by the intake air temperature 1, the opening degree of the throttle valve 23 detected by the throttle position sensor 2, and the sense of temperature of the engine. The correction factor K is set by the wall surface temperature of the engine 25 detected by the detector 4. Next, in step S203, the control unit 10 sets the feedback correction amount Kfb in accordance with the oxygen concentration detected by the oxygen concentration sensor 6. The details of the setting of the feedback correction amount Kfb will be described later with reference to Fig. 4. Next, in step S204, the control unit 10 is the actual rotational speed Ne of the engine 25 detected by the crank angle detector 5, and the throttle opening TH detected by the throttle valve position sensor 2. The corrected correction distribution TKLRNAF (Ne, TH) is used to correct the alcohol concentration estimation value Kirn, and the air-fuel ratio learning correction coefficient Kaf is calculated. That is, the air-fuel ratio learning correction coefficient Kaf is set in accordance with Kaf=KlrnxTKLRNAF (Ne, TH). Next, in step S205, the control unit 10 sets the voltage correction amount Tb in accordance with the battery voltage. Then, in step S206, the control unit 10 calculates the fuel injection amount T based on the basic fuel injection amount Ti, the correction coefficient K, the feedback correction amount Kfb, the air-fuel ratio learning correction coefficient Kaf, and the voltage correction amount Tb. Also 10 320066 ^Set the fuel according to THxKfbxKaf+Tb. The 7L 10 series will be output to the fuel injection module 27 corresponding to the calculated 2nd and 2nd rounds. The driving signal 10 of the τ is connected to the power supply, and the operation is set with a certain fuel injection amount (Lake 5206). The above is repeated. For the control unit of the engine control unit, the operation is described with reference to Fig. 4 (4). The mouth feed correction is set in step S30I, and the rotational speed Ne, the engine 25, and the engine 25 are determined according to whether the actual feed condition of the engine 25 is equal to or not, and the throttle opening degree is judged to be the return rotational speed Ne. ^ Unit 1 is within the real range of W25, and within the section / circumference, the temperature of the engine 25 is predetermined. When the feedback is stopped within the predetermined range, the feedback condition is judged to be made, and when the feedback is made, the next step is added. The other party "not established, then the month" proceeds to step S3 10. ., _ person, in step S302, the control unit 1 determines = fixed value. If it indicates that the estimated value is calculated: := (four) (1), then When it is judged that the previous alcohol concentration has been calculated, and the alcohol concentration is estimated, the next itw surface '# the previous alcohol concentration estimation value is not calculated,' is introduced to step S304. - Person' In step S3〇3, the control unit Κ "staged as "in addition, it will indicate that the "two-quantity setting flag" is set to reset (.). L is a fine-degree push-to-under' in step S304' control unit 1() performs a well-known back π

S 320066 1343447 Calculation processing of the feed positive amount Kfb. That is, when the previous alcohol concentration value is calculated, it is calculated in the early morning 1G system: the amount of the amount of the previous calculation of the previous alcohol concentration is calculated in the previous calculation. Enter (add) the feedback correction amount Kfb calculated this time.中习模=否=STEP_中’ The control unit is judged to be empty. The air-fuel ratio learning mode is within a predetermined range when the engine Μ:: square rotation speed Ne is within a predetermined range (for example, in the range of the bay), and the temperature of the engine 25 is Jm ^ 2000rPm ^ / In the range of Example 110.) The state below the throttle valve 1.34 (four) is satisfied: it is a pre-value (for example, when the learning mode is established, the next step s: = face = combustion ratio f mode is not established, Then enters and returns to (1). "The center of the quantity Kfb: S306" The control unit 10 implements the feedback correction. The second control unit 10 adds the feedback correction amount Kfb in the step: the predetermined number of times (25 times ( For example, 256 times), the average value of the feedback correction amount is calculated. In addition, in step 5307, the control unit 10 is based on the previous calculation of the feedback correction average 〆 〆 + + + + + + + + The S306 towel calculates the alcohol concentration estimation value Klrn calculated from the current average value. Further, d: indicates that the flag of the previous wine_estimation value has been calculated + step t'. In step S308, the control unit 10 determines. Whether the alcohol concentration calculated in ... 307 is the heart rate memory Non-volatile?: £) 320066 12 1343447] 3 2: That is, the control unit 1 is the value of the #^辰 calculated in step S307, and is stored in the non-volatile memory 11, The absolute value of the difference between 邛 is a first predetermined value (for example, 0.1) to three and the actual rotational speed Ne of the engine 25 is within a predetermined range (from the second mode such as 50 () rpm) to the third predetermined value (for example, 2) 〇(K) rpm) is judged to be stored in the non-volatile memory u.

= at: 丨 Kirn-Keep| g 】 predetermined value and the second predetermined value - pre-depreciation is judged to be stored in non-volatile memory u. When the calculated alcohol concentration estimated value Klrn is memorized to the non-volatile memory u^, the process proceeds to step S3G9. On the other hand, when not remembering to the body 11, then proceed to return. ° and then in step S3〇9, the control unit 1 will advance to the return value of the alcohol concentration estimated value in the step 记忆“memory in the non-volatile note 11 '. " Dragon in step S310 The control unit 1 converts the feedback correction amount to 1". Further, the flag FL indicating that the previous alcohol concentration estimation value has been calculated is reset to (〇), and the return is made. In the first embodiment, the amount of alcohol concentration estimated to be corrected in the fuel injection amount is stored in the non-volatile memory U in such a manner that the number of exchanges of the non-volatile memory 丨1 is not exceeded. Set limits. That is, 'reducing the number of times of non-volatile memory U to be replaced without making the number of non-volatile memory II write-outs exceed the upper limit', thereby preventing excessive (excessive) production. When the alcohol concentration is estimated, it is possible to prevent over-concentration (over 320066 1343447 thin) by initializing the feedback correction amount to reduce the double correction of the fuel emission amount. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the configuration of an engine control device according to a first embodiment of the present invention. The figure shows a flowchart of the initial operation of the control unit of the engine control device according to the first embodiment of the present invention. Fig. 3 is a flow chart showing the control of the fuel injection amount setting operation of the engine control device of the palladium form of the first brother of the first month. [Main component symbol description] 1 Intake temperature sensor 2 3 Inspiratory pressure sensor 4 5 Crank angle sensor 6 10 Control unit 11 21 Air cleaner 22 23 Throttle valve 24 25 Engine 26 27 Fuel injection mold Group 28 29 Ignition plug 30 31 Exhaust gas purification catalyst

Throttle position sensor Engine temperature sensor Oxygen temperature sensor Non-volatile memory Inspiratory path ISC Fuel tank Ignition coil Exhaust path 320066 14

Claims (1)

X. Patent application scope: 1. An engine control device, which has: non-volatile memory for memorizing the estimated alcohol concentration; crank angle sensing for detecting the actual rotation speed of the engine; suction pressure sensor , detecting the intake air pressure; inhaling the temperature sensor, detecting the temperature of the intake air; the throttle position sensor detecting the opening of the throttle valve; the engine temperature sensor detecting the temperature of the engine; the sense of oxygen concentration a detector for detecting the concentration of oxygen in the exhaust gas of the engine; a fuel injection module 'injecting fuel to the engine; and a control unit for reading the value stored in the non-volatile memory as the alcohol at the power source 0N The estimated concentration value is calculated based on the actual rotational speed of the engine detected by the crank angle sensor and the intake air pressure detected by the intake pressure sensor detected by the inhalation pressure. The temperature of the intake air detected by the aforementioned intake air temperature sensor, and the opening degree of the throttle valve detected by the aforementioned throttle position sensor And setting a correction coefficient by the engine temperature detected by the engine temperature sensor; setting a feedback compensation amount according to the oxygen occupancy detected by the helium concentration sensing is; detecting according to the crank angle sensor The actual rotation speed of the engine, and the throttle degree detected by the position sensor and the throttle valve to correct the alcohol concentration estimation value and set the air-fuel ratio learning coefficient; the voltage correction amount is set according to the battery voltage; The correction coefficient and the feedback correction 320066 15 1343447 are proportional to the learning correction coefficient and the voltage correction amount, and the correction of the basic injection amount and the calculation of the fuel injection amount, and the fuel injection amount of the fuel injection amount is different. And when the heart is output to the fuel injection unit, when the empty (four) mode is established, the _ concentration estimation value is calculated based on the first 1=::, and the difference between the calculated estimated values is hidden. The absolute concentration of alcohol in the non-volatile memory is at a predetermined value. The engine 6 is hidden in the non-volatile memory. 2· The engine control of the first item in the range In the above, the actual rotation speed of the control system is predetermined in the S engine, the degree is within a predetermined range, and the opening degree of the throttle width is changed to predetermined = 守, and the air-fuel ratio learning mode is determined to be established; The absolute value of the difference between the farmer's estimated value and the alcohol concentration stored in the above = volatile memory is 〇ι ' The rotational speed of the engine's R is from 500 rpm to 2 rpm it. When the 'calculated alcohol concentration value is stored in the month, J is a non-volatile memory. ^ Shen: Patent Range ® 1 or 2 of the engine control device, the 'previous control unit is calculating the previous alcohol The initial U feedback correction amount is initialized when the concentration is estimated. The engine control device of the third patent scope of June 6th, in which the above-mentioned control 320066 16 system is in the first 4j al χ θ "" When the alcohol concentration is estimated, the initial, +, and positive quantities are initialized to 〗.弋 衧 will refer to the feedback engine control device, which has: non-volatile memory, crank angle sensor, estimated concentration of detection, · suction sensor The temperature sensing sensor detects the position of the suction throttle valve; the phoenix, the state is the opening of the valve; the sensor is used to detect the oxygen of the engine and the oxygen. a two-gas concentration sensor for detecting a gas concentration of the engine; a fuel injection module that injects fuel into the engine; and a working unit and a power source (10), reading a value stored in the non-smart memory As the estimated alcohol concentration, the actual rotational speed of the engine detected by the aforementioned curved and angular sensors, and the intake air detected by the inhalation pressure sensor detected by the aforementioned rage force are different. The amount of fuel injection; the temperature of the second and second rolls measured by the aforementioned intake temperature sensor, the opening of the throttle valve measured by the aforementioned throttle position sensor, and the engine temperature Detected by the sensor Setting the correction coefficient for the engine temperature; setting the feedback correction amount according to the oxygen concentration detected by the aforementioned oxygen concentration sensory; according to the actual rotation speed of the engine detected by the handle angle sensing|§, and the previous robbery The opening position of the throttle valve detected by the flow valve position sensor corrects the pre-i alcohol '/agricultural degree estimation value and sets the air-fuel ratio learning coefficient; according to the battery shoulder 17 320066 and the q voltage correction amount; according to the foregoing amount, the foregoing The air-phase feed compensation positively corrects the above-mentioned basic material spray, and the voltage correction amount is generated, and the calculated fuel is injected and shaken, and the corresponding shot module is output; and the moving δίι is output to the fuel injection control unit. When the alcohol concentration estimation value is described in the initial stage of the feedback correction amount, the engine control unit in the fifth application of the patent scope is calculated to calculate the previous alcohol concentration, wherein the aforementioned control amount is initially set to 1. . When the value is right, the above feedback will be corrected. 18 (S 320066