JP2013072415A - Control device and control method of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fuel economy of an internal combustion engine by stably supplying ions in an amount appropriate to the combustion state of the internal combustion engine to the internal combustion engine.SOLUTION: A control device 10 of an engine 12 detects an engine state quantity responding to a combustion state of the engine 12 through each detection means and measures an ion amount in a combustion chamber 29 of the engine 12 by an ion amount measuring device 92. An ion generator 86 disposed in an intake device 14 generates ions in an amount required to the combustion in the engine 12 in response to the engine state quantity detected by each detection means, the ion amount measured by the ion amount measuring device 92, a distance between the ion generator 86 and the ion amount measuring device 92, and the temperature and/or humidity of intake air and refluxed exhaust gas.

Description

  The present invention relates to a control device and a control method for stabilizing the combustion state of an internal combustion engine by supplying ions generated by an ion generator to the internal combustion engine.

  Recently, a technique for stabilizing and improving the efficiency of combustion in an internal combustion engine by providing an ion generator in an intake system of the internal combustion engine and supplying ions generated by the ion generator to the internal combustion engine is disclosed in Patent Literature. 1 is disclosed.

  In Patent Document 1, when a part of exhaust gas discharged from an internal combustion engine is recirculated from an exhaust system to an intake system via an exhaust gas recirculation device (EGR device), fresh air (intake air) from the intake system is disclosed. ) And the recirculated exhaust gas are arranged in a plasma reactor as an ion generator, and the exhaust gas and fresh air are converted into plasma in the plasma reactor to generate ions (for example, active species such as radical groups). And supplying the active species to the internal combustion engine has been proposed.

JP 2009-167997 A

  However, since the technique of Patent Document 1 merely supplies the active species generated in the plasma reactor to the internal combustion engine, even if the plasma reactor generates a desired amount of active species, The amount of active species reaching the combustion chamber may decrease due to the distance to the combustion chamber of the internal combustion engine and the temperature and / or humidity of the space between the plasma reactor and the combustion chamber in the intake system There is. As a result, in the combustion chamber, an amount of active species suitable for the combustion state of the internal combustion engine cannot be secured.

  The present invention has been made in consideration of the above-described various problems, and improves the fuel efficiency of an internal combustion engine by stably supplying an amount of ions suitable for the combustion state of the internal combustion engine to the internal combustion engine. It is an object of the present invention to provide a control device and a control method that can be used.

In order to achieve the above object, a control device for an internal combustion engine according to the present invention comprises:
Combustion state detection means for detecting the combustion state of the internal combustion engine, an ion generator provided in the intake system of the internal combustion engine, and an ion on the internal combustion engine side provided on the internal combustion engine side relative to the ion generator An ion amount measuring device for measuring the amount,
The ion generator is an amount required for combustion in the internal combustion engine according to the combustion state of the internal combustion engine detected by the combustion state detection means and the distance between the ion generator and the ion amount measuring device. It is characterized by the generation of ions.

The control method for an internal combustion engine according to the present invention includes:
The combustion state of the internal combustion engine is detected by the combustion state detection means,
Measure the amount of ions on the internal combustion engine side with an ion amount measuring device provided on the internal combustion engine side than the ion generator provided on the intake system of the internal combustion engine,
According to the combustion state of the internal combustion engine detected by the combustion state detection means and the distance between the ion generator and the ion amount measuring device, the ions are generated in an amount necessary for combustion in the internal combustion engine. It is characterized by being generated by a vessel.

  According to these inventions, the ion generator has a quantity of ions necessary for combustion in the internal combustion engine according to the combustion state of the internal combustion engine and the distance between the ion generator and the ion amount measuring device. Is generated. As a result, even if ions generated by the ion generator may decrease before reaching the internal combustion engine due to the distance, the ion generator compensates for the decrease, and Can be generated. Therefore, in the present invention, the fuel efficiency of the internal combustion engine can be improved by stably supplying an amount of ions suitable for the combustion state of the internal combustion engine to the internal combustion engine.

In order to achieve the above object, an internal combustion engine control apparatus according to the present invention includes:
Combustion state detection means for detecting the combustion state of the internal combustion engine, an ion generator provided in the intake system of the internal combustion engine, and an ion on the internal combustion engine side provided on the internal combustion engine side relative to the ion generator An ion amount measuring device for measuring the amount, and a temperature measuring device and / or a humidity measuring device provided between the ion generator and the ion amount measuring device,
The ion generator generates the internal combustion engine according to the combustion state of the internal combustion engine detected by the combustion state detection means, the temperature detected by the temperature measuring device, and / or the humidity detected by the humidity measuring device. It is characterized by the generation of ions necessary for combustion in the engine.

The control method for an internal combustion engine according to the present invention includes:
The combustion state of the internal combustion engine is detected by the combustion state detection means,
Measure the amount of ions on the internal combustion engine side with an ion amount measuring device provided on the internal combustion engine side than the ion generator provided on the intake system of the internal combustion engine,
Measuring the temperature with a temperature measuring device provided between the ion generator and the ion content measuring device, and / or measuring the humidity with a humidity measuring device,
Necessary for combustion in the internal combustion engine according to the combustion state of the internal combustion engine detected by the combustion state detection means, the temperature detected by the temperature measuring device, and / or the humidity detected by the humidity measuring device. It is characterized in that an appropriate amount of ions is generated by the ion generator.

  According to these inventions, the ion generator is the internal combustion engine according to the combustion state of the internal combustion engine, the temperature detected by the temperature measuring device, and / or the humidity detected by the humidity measuring device. The amount of ions required for the combustion of is generated. As a result, even if the ions generated by the ion generator may decrease before reaching the internal combustion engine due to the temperature and / or the humidity, the ion generator reduces the decrease. It can be supplemented to generate ions. Therefore, also in the present invention, the fuel efficiency of the internal combustion engine can be improved by stably supplying an amount of ions suitable for the combustion state of the internal combustion engine to the internal combustion engine.

  In this case, the control device further includes a temperature measuring device and / or a humidity measuring device provided between the ion generator and the ion amount measuring device, and the ion generator includes the combustion state detecting means. Depending on the combustion state of the internal combustion engine detected by the sensor, the distance between the ion generator and the ion amount measuring device, the temperature detected by the temperature measuring device, and / or the humidity detected by the humidity measuring device. Thus, an amount of ions necessary for combustion in the internal combustion engine can be generated.

  This allows the ion generator to generate an amount of ions necessary for combustion in the internal combustion engine according to the distance, the temperature and / or the humidity, so that the combustion state of the internal combustion engine This makes it possible to stably supply an appropriate amount of ions to the internal combustion engine, thereby further improving fuel efficiency.

  In addition, the control device described above, when the difference between the amount of ions measured by the ion amount measuring device and the amount of ions necessary for combustion in the internal combustion engine is not within a certain range, the necessary amount of ions. It is preferable to further have a control means for controlling the ion generator so as to generate In this way, the control means performs feedback control using the ion amount measured by the ion amount measuring device, so that stable supply of ions to the internal combustion engine can be performed efficiently and fuel efficiency can be further improved. Can be achieved.

  The control means may adjust the amount of ions generated by the ion generator using a map showing the relationship between the combustion state of the internal combustion engine and the amount of ions on the internal combustion engine side. As a result, even if a decrease in the amount of ions occurs, an amount of ions necessary for combustion in the internal combustion engine can be quickly supplied to the internal combustion engine.

  According to the present invention, the following effects can be obtained.

  That is, it becomes possible to stably supply an amount of ions suitable for the combustion state of the internal combustion engine to the internal combustion engine, and the fuel efficiency of the internal combustion engine can be improved.

It is a schematic structure explanatory view of a control device of an internal-combustion engine concerning this embodiment. It is a flowchart for demonstrating correction | amendment of the map used for supply of the ion to an internal combustion engine. 3A to 3D are maps used for the operation of the flowchart of FIG.

  The control device for an internal combustion engine according to the present invention will be described in detail below with reference to the accompanying drawings by giving a preferred embodiment in relation to the control method for the internal combustion engine.

[Configuration of this embodiment]
In FIG. 1, a control device 10 for an internal combustion engine according to the present embodiment is provided with an intake device (intake system) 14 and an exhaust device (exhaust system) 16 in an engine (internal combustion engine) 12, and the intake device 14 and the exhaust device 16. Are connected by an EGR passage (exhaust gas recirculation means) 18 and an EGR device 20 is provided in the middle of the EGR passage 18 to control the EGR device 20 so that the intake device 14 and the exhaust device 16 communicate with each other. In addition, a part of the exhaust gas discharged from the engine 12 is recirculated to the intake device 14, while the intake air containing ions (for example, including active species such as radical groups) and the recirculated exhaust gas are supplied to the intake device 14. This is a device for stabilizing the combustion state in the engine 12 and improving the fuel consumption by stably supplying the engine 12 to the engine 12. In FIG. 1, a multi-cylinder engine 12 having a plurality of cylinders, and an intake device 14 and an exhaust device 16 connected to the engine 12 are schematically illustrated.

  Here, the engine 12, the intake device 14, the exhaust device 16, the EGR passage 18 and the EGR device 20 to which the control device 10 is applied will be described.

  The engine 12 is mounted on a vehicle such as an automobile or a motorcycle, for example, and a plurality of cylinder chambers 22 are formed inside the engine body 21. Each cylinder chamber 22 is provided with a piston 24 that can be displaced along the axial direction. That is, the strokes of the piston 24 cause intake, compression, combustion, and exhaust strokes in the engine 12. Then, the driving force of the engine 12 is output from the piston 24 via the connecting rod 26 and the crankshaft 28. In FIG. 1, only one cylinder chamber 22 is shown.

  An intake port 30 and an exhaust port 32 are opened in the combustion chamber 29 formed above the cylinder chamber 22. The intake port 30 is provided with an intake valve 34, while the exhaust port 32 is provided with an exhaust valve 36. An ignition plug 38 is provided for each combustion chamber 29 above the combustion chamber 29 between the intake port 30 and the exhaust port 32.

  Each intake port 30 is connected to an intake branch pipe 42 of an intake manifold 40 constituting the intake device 14. The intake manifold 40 is formed so as to be connected to each intake branch pipe 42 and each intake branch pipe 42 formed in a branch shape so as to branch into a plurality of pipes on the engine 12 side as the downstream side, and has a predetermined capacity. The tank portion 44 is formed on the upstream side of the tank portion 44, and includes an intake manifold 46 that collects the intake branch pipes 42. As described above, since only one cylinder chamber 22 is illustrated in FIG. 1, only one intake branch pipe 42 is illustrated for the intake manifold 40.

  The intake manifold 46 is provided with a throttle body 50 including a throttle valve 48 that opens and closes in response to an operation of an accelerator pedal (not shown). An air cleaner 52 is provided on the upstream side of the throttle body 50, and intake air is taken into the intake manifold 40 from the outside through the air cleaner 52. In this case, dust or the like contained in the intake air is suitably removed by the air cleaner 52.

  Each intake branch pipe 42 is provided with an injector (fuel injection means) 54 for injecting fuel so as to face the intake port 30. Note that the present invention is also applicable to a direct injection engine in which the injector 54 is disposed directly in the combustion chamber 29.

  On the other hand, an exhaust branch pipe 60 of an exhaust manifold 58 constituting the exhaust device 16 is connected to each exhaust port 32. The exhaust manifold 58 includes exhaust branch pipes 60 formed in a branch shape so as to branch into a plurality of pipes on the engine 12 side as the upstream side, and exhaust collecting pipes 62 that collect the exhaust branch pipes 60. The exhaust collecting pipe 62 is provided with a catalyst 64 such as a three-way catalyst for purifying CO, HC, NOx and the like in the exhaust gas exhausted from each exhaust port 32 by the exhaust stroke of the engine 12. In FIG. 1, only one exhaust branch pipe 60 is shown for the exhaust manifold 58.

  The downstream side of the exhaust collecting pipe 62 and the downstream side of the intake collecting pipe 46 are connected by the EGR passage 18. The EGR passage 18 connects an exhaust side exhaust recirculation pipe 70 extending from the downstream side of the exhaust collecting pipe 62 to the input port 82 of the EGR device 20, and also connects an intake side exhaust recirculation pipe 74 extending from the downstream side of the intake collecting pipe 46 to the EGR. It is configured by connecting to the output port 84 of the device 20.

  In the EGR device 20, a valve 78 is attached to the tip of the shaft 76, and when the shaft 76 is displaced in the axial direction and the valve 78 is separated from the input port 82, the valve is opened and a part of the exhaust gas is exhausted. The air can be recirculated from the collecting pipe 62 to the intake collecting pipe 46 via the exhaust-side exhaust recirculation pipe 70, the EGR device 20, and the intake-side exhaust recirculation pipe 74. As a result, when fuel is injected from the injector 54 with respect to the exhaust gas recirculated to the intake device 14 and the intake air from the upstream side of the intake device 14, the fuel and intake air are recirculated near the intake port 30. An air-fuel mixture that is mixed with the exhaust gas is formed, and the air-fuel mixture can be sucked into the combustion chamber 29 during the intake stroke of the engine 12. If the valve 78 closes the input port 82 due to the axial displacement of the shaft 76, the EGR device 20 is closed, and the communication state between the intake manifold 46 and the exhaust manifold 62 is blocked ( The exhaust gas recirculation operation stops). The EGR device 20 is provided with a lift sensor 80 that detects the opening degree (lift amount) of the valve 78 with respect to the input port 82.

  An ion generator 86 that generates ions by converting the intake air into plasma is disposed in the intake manifold 46. Accordingly, the ions generated by the ion generator 86 reach the intake port 30 through the tank portion 44 and the intake branch pipe 42 together with the intake air and the recirculated exhaust gas, and are mixed by the fuel injected from the injector 54. The air is sucked into the combustion chamber 29.

  It should be noted that the ion generator 86 can be disposed at any location in the intake device 14 as long as it can generate ions by converting the intake air into plasma, but the intake manifold 46 and the intake side exhaust are not limited. If it is arranged on the upstream side of the intake manifold 46 from the junction of the reflux pipe 74, only the intake air can be made into plasma, and ions can be reliably generated from oxygen molecules in the intake air.

  In FIG. 1, the engine 12, the intake device 14, and the exhaust device 16 are provided with the following detection means (combustion state detection means) in order to detect a physical quantity (engine state quantity) related to the combustion state of the engine 12. It is installed.

  The engine 12 is provided with an engine speed sensor 90 that detects the engine speed based on the crank angle of the crankshaft 28. The spark plug 38 is also used as an ion amount measuring device 92 that measures the amount of ions in the combustion chamber 29.

  The tank unit 44 is provided with a temperature / humidity sensor (temperature measuring instrument, humidity measuring instrument) 94 that detects the temperature and / or humidity of the intake air (and the recirculated exhaust gas) containing ions. The intake manifold 46 is provided with an air flow meter (intake air quantity detector) 96 that detects the amount of intake air (intake air quantity) taken into the intake manifold 46 from the outside through the air cleaner 52. Further, the intake manifold 46 is provided with a negative pressure sensor (negative pressure detecting means) 98 for detecting the negative pressure of the intake air sucked into the combustion chamber 29 of the engine 12 from the intake device 14. Note that the temperature / humidity sensor 94 only needs to be able to detect the temperature and / or humidity of the intake air (and the recirculated exhaust gas) containing ions, so that the confluence of the intake manifold 46 and the intake-side exhaust recirculation pipe 74 It suffices if it is disposed between the intake port 30 and the intake port 30.

  Furthermore, a vehicle speed sensor 102 that detects the vehicle speed of the vehicle on which the engine 12 or the like is mounted is also provided.

  The detection results (detection signals indicating these detection means) are output to the engine control unit (ECU) 112.

  The ECU (control means) 112 controls the engine 12, the EGR device 20, the ignition plug 38, the throttle valve 48, the injector 54, and the like based on the detection result of the above-described detection means. The ECU 112 also has a map 114 for determining the amount of ions generated by the ion generator 86.

  In this case, the ECU 112 determines the amount of ions necessary for combustion in the combustion chamber 29 using the detection result of each detection means and the map 114, and generates the determined amount of ions by using the ion generator 86. To control. That is, since a detection signal indicating the actual amount of ions in the combustion chamber 29 is input from the ion amount measuring device 92 to the ECU 112, the ECU 112 determines the amount of ions in the combustion chamber 29 determined in advance using the map 114, and If there is a deviation from the actual ion quantity in the combustion chamber 29 measured by the ion quantity measuring device 92, the ion generator 86 is feedback-controlled so that this deviation becomes zero.

  Therefore, the control device 10 for the engine 12 according to the present embodiment is configured by the above-described detection means and the ECU 112 (and each component in the ECU 112).

[Operation of this embodiment]
The control device 10 according to the present embodiment is configured as described above. Next, the operation of the control device 10 will be described with reference to FIGS. In addition, in this description, it demonstrates, also referring FIG. 1 as needed.

  FIG. 2 is a flowchart for stably supplying an ion amount necessary for combustion in the combustion chamber 29 of the engine 12 after the start of the engine 12 is started.

  First, when the engine 12 starts to start by turning on an ignition switch (not shown) by the driver, various detection means provided in the engine 12 and the like are physical quantities related to the combustion state in the combustion chamber 29 (engine state). Detection), and outputs the detection result to the ECU 112 as a detection signal (step S1).

  Specifically, the engine speed sensor 90 detects the engine speed and outputs a detection signal indicating the engine speed to the ECU 112. The vehicle speed sensor 102 detects the vehicle speed and outputs a detection signal indicating the vehicle speed to the ECU 112. The air flow meter 96 detects the amount of intake air and outputs a detection signal indicating the amount of intake air to the ECU 112. The negative pressure sensor 98 detects the negative pressure of the intake air, and outputs a detection signal indicating the negative pressure to the ECU 112. The temperature / humidity sensor 94 detects the temperature and / or humidity of the intake air (and the recirculated exhaust gas), and outputs a detection signal indicating the temperature and / or humidity to the ECU 112.

  In step S2, the ECU 112 refers to the map 114 and specifies the ion amount (necessary ion amount) a necessary for combustion in the combustion chamber 29 according to each engine state amount input to the ECU 112. To do. FIG. 3A shows the contents of the map 114 for specifying the necessary ion amount a from the engine state quantity.

  The contents of the map 114 shown in FIGS. 3A to 3D are not limited to the case where the engine state quantity other than the temperature and / or humidity of the intake air (and the recirculated exhaust gas) is used. The present invention is also applicable when the temperature and / or humidity of the exhaust gas) is taken into consideration.

  In step S3 after specifying the required ion amount a in this way, the ECU 112 specifies an applied voltage corresponding to the required ion amount a with reference to FIG. 3B. When the temperature and / or humidity of the intake air (and the recirculated exhaust gas) is not taken into consideration, the necessary ion amount a is obtained from one curve (broken line) showing the relationship between the necessary ion amount a and the applied voltage V. The applied voltage V corresponding to is specified. Further, in FIG. 3B, a curve indicating the relationship between the necessary ion amount a and the applied voltage is shown for each different temperature and / or humidity. Therefore, when the temperature and / or humidity of the intake air (and the recirculated exhaust gas) is taken into consideration, the applied voltage V or V2 corresponding to the required ion amount a and the temperature and / or humidity of the intake air is specified. .

  Then, the ECU 112 supplies the ion generator 86 with the applied voltage V or V2 specified in advance in this way. Based on the supplied applied voltage V or V2, the ion generator 86 converts the intake air passing therethrough into plasma and generates ions.

  On the other hand, when a control signal is supplied from the ECU 112 to the EGR device 20, a solenoid (not shown) of the EGR device 20 is excited and the shaft 76 is displaced in the axial direction. As a result, the valve 78 is separated from the input port 82. Then, the EGR device 20 is opened.

  In the intake stroke of the engine 12, the exhaust gas discharged from the engine 12 is recirculated from the exhaust device 16 to the intake manifold 46 through the EGR passage 18 and the EGR device 20 due to the negative pressure, and is ionized intake air. And the recirculated exhaust gas are taken into the tank portion 44 together.

  The intake air containing ions taken into the tank 44 and the recirculated exhaust gas are mixed with the fuel injected from the injector 54 to become an air-fuel mixture, and are sucked into the combustion chamber 29 from the intake port 30 by the negative pressure. .

  In the next step S4, the ion amount measuring device 92 measures the ion amount a1 in the air-fuel mixture sucked into the combustion chamber 29 in the intake stroke of the engine 12, and outputs the measurement result to the ECU 112 as a detection signal. Here, the reason for the intake stroke is that the amount of ions generated after combustion is not included in the measured value, and the amount of generated ions a1 can be accurately measured. In addition, when a direct injection engine is applied, the gas sucked into the combustion chamber 29 does not contain fuel, which is preferable because the measurement accuracy of the ion amount a1 is increased.

  In step S5, the ECU 112 compares the actual ion amount a1 input from the ion amount measuring device 92 with the necessary ion amount a determined in advance in step S2, and the actual ion amount a1 calculates the necessary ion amount a. It is determined whether or not it is within a predetermined range.

  That is, even if the ion generator 86 generates ions by the required ion amount a, depending on the distance from the ion generator 86 to the ion amount measuring device 92, the temperature and / or humidity of the intake air and the recirculated exhaust gas, The amount of ions contained in the intake air and the recirculated exhaust gas decreases until the ions reach the combustion chamber 29. As a result, the actual ion amount a1 measured by the ion amount measuring device 92 is the required ion amount. may be lower than a (see FIG. 3C).

  Even if ions are generated by the ion generator 86 by the required ion amount a corresponding to the engine state amount, the actual ion amount a1 measured by the ion amount measuring device 92 is necessary for combustion in the combustion chamber 29. It is assumed that the amount of ions is larger than the amount of ions.

  Accordingly, the ECU 112 performs feedback control on the amount of ions supplied to the combustion chamber 29 as described below.

  Specifically, in step S5, if the actual ion amount a1 is within a predetermined range (step S5: YES), the ECU 112 performs combustion in the combustion chamber 29 if the content of the current map 114 is present. It is determined that the necessary amount of ions can be stably supplied to the combustion chamber 29, and the content of the current map 114 is determined.

  On the other hand, if the actual ion amount a1 is out of the predetermined range in step S5 (step S5: NO), the ECU 112 corrects the applied voltage so that the actual ion amount a1 becomes the necessary ion amount a ( In step S7), the content of the map 114 is corrected according to the voltage correction (see step S8, FIG. 3D).

  Specifically, in steps S7 and S8, the ECU 112 corrects the applied voltage to be higher from V or V2 to V1 when the actual ion amount a1 is smaller than the required ion amount a. The curve of the map 114 is shifted to the high voltage side according to the voltage correction. Here, V2 is set higher than V in consideration of reduction of the ion amount due to temperature and / or humidity.

  In the correction of the map 114, when the temperature and / or humidity is not taken into consideration, the curve of the applied voltage V (broken line) is shifted to the curve of the applied voltage V1 (solid line). On the other hand, when considering temperature and / or humidity, the curve is shifted from the curve (broken line) of the applied voltage V2 higher than the applied voltage V to the curve (solid line) of the applied voltage V1.

  Therefore, if the map 114 takes into account the temperature and / or humidity of the intake air and the recirculated exhaust gas, the correction amount of the applied voltage can be made smaller than when the temperature and / or humidity is not taken into account. The amount of ions supplied to the combustion chamber 29 can be quickly brought close to the required amount of ions a.

  When the actual ion amount a1 is larger than the required ion amount a, the applied voltage V or V2 is set (corrected) lower, and the map correction is shifted to the low voltage side according to the voltage correction. That's fine.

  After voltage setting (correction) in step S7 or after correction of the map 114 in step S8 according to the voltage setting, the ECU 112 returns to step S3 and is based on the setting voltage in step S7 or the voltage setting in step S8. The applied voltage V2 based on the content of the corrected map 114 (see FIG. 3D) is supplied to the ion generator 86. Therefore, the ion generator 86 generates a predetermined amount of ions based on the supplied applied voltage V2 so that the amount of ions supplied to the combustion chamber 29 becomes the required ion amount a.

  Therefore, the controller 10 supplies the optimum applied voltage to the ion generator 86 by repeatedly performing the processes of steps S3 to S5, S7, and S8 until the actual ion amount a1 reaches the necessary ion amount a. Thus, the amount of ions supplied to the combustion chamber 29 can quickly reach the required ion amount a.

  In the above description, when the vehicle is traveling on a cruise, the opening degree (lift amount) of the valve 78 of the EGR device 20 is increased, and more exhaust gas is recirculated to the intake device 14 to improve fuel efficiency. Sometimes. Therefore, the ECU 112 sets the required ion amount a large in consideration of the lift amount in addition to the engine state amount in order to suppress the combustion failure due to the EGR gas in the combustion chamber 29, and the set required ion amount a What is necessary is just to control the ion generator 86 so that it may generate | occur | produce.

[Effect of this embodiment]
As described above, according to the control device 10 for the engine 12 according to the present embodiment, the engine state quantity corresponding to the combustion state of the engine 12, the actual ion quantity measured by the ion quantity measuring device 92, and the ion generation The ion generator 86 generates a quantity of ions necessary for combustion in the engine 12 according to the distance between the detector 86 and the ion quantity measuring device 92 and the temperature and / or humidity of the intake air and the recirculated exhaust gas. To do. Thereby, even if the ions generated by the ion generator 86 may decrease before reaching the engine 12 due to the distance, the temperature, and / or the humidity, the ion generator 86 is reduced. The ions can be generated by supplementing the minutes. Therefore, in this embodiment, the fuel consumption of the engine 12 can be improved by stably supplying an amount of ions suitable for the combustion state of the engine 12 to the engine 12.

  In addition, when the difference between the actual ion amount a1 measured by the ion amount measuring device 92 and the amount of ions necessary for combustion in the engine 12 (required ion amount) a is not within a certain range, the ECU 112 The ion generator 86 is controlled so as to generate the necessary ion amount a. Thus, since the ECU 112 performs feedback control on the ion amount using the actual ion amount a1 measured by the ion amount measuring device 92, stable supply of ions to the engine 12 can be performed efficiently, and further Improved fuel economy can be achieved.

  In this case, the ECU 112 adjusts the amount of ions generated by the ion generator 86 using the map 114 indicating the relationship between the engine state quantity related to the combustion state of the engine 12 and the amount of ions in the combustion chamber 29. Even if the amount is reduced, the amount of ions necessary for combustion in the combustion chamber 29 can be quickly supplied to the combustion chamber 29.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Control apparatus 12 ... Engine 14 ... Intake device 16 ... Exhaust device 18 ... EGR passage 20 ... EGR device 29 ... Combustion chamber 30 ... Intake port 32 ... Exhaust port 38 ... Spark plug 40 ... Intake manifold 42 ... Intake branch pipe 44 ... Tank unit 46 ... Intake collecting pipe 54 ... Injector 58 ... Exhaust manifold 86 ... Ion generator 90 ... Engine speed sensor 92 ... Ion amount measuring instrument 94 ... Temperature / humidity sensor 96 ... Air flow meter 98 ... Negative pressure sensor 102 ... Vehicle speed sensor 112 ... ECU
114 ... Map

Claims (7)

Combustion state detection means for detecting the combustion state of the internal combustion engine;
An ion generator provided in an intake system of the internal combustion engine;
An ion amount measuring device that is provided closer to the internal combustion engine than the ion generator and measures the amount of ions on the internal combustion engine side;
Have
The ion generator is an amount required for combustion in the internal combustion engine according to the combustion state of the internal combustion engine detected by the combustion state detection means and the distance between the ion generator and the ion amount measuring device. A control apparatus for an internal combustion engine, characterized by generating Combustion state detection means for detecting the combustion state of the internal combustion engine;
An ion generator provided in an intake system of the internal combustion engine;
An ion amount measuring device that is provided closer to the internal combustion engine than the ion generator and measures the amount of ions on the internal combustion engine side;
A temperature measuring device and / or a humidity measuring device provided between the ion generator and the ion content measuring device;
Have
The ion generator generates the internal combustion engine according to the combustion state of the internal combustion engine detected by the combustion state detection means, the temperature detected by the temperature measuring device, and / or the humidity detected by the humidity measuring device. A control device for an internal combustion engine, characterized by generating an amount of ions necessary for combustion in the engine. The control device according to claim 1,
A temperature measuring device and / or a humidity measuring device provided between the ion generator and the ion content measuring device;
The ion generator includes a combustion state of the internal combustion engine detected by the combustion state detection means, a distance between the ion generator and the ion amount measuring device, a temperature detected by the temperature measuring device, and / or A control device for an internal combustion engine, which generates ions in an amount necessary for combustion in the internal combustion engine according to the humidity detected by the humidity measuring device. In the control device according to any one of claims 1 to 3,
When the difference between the amount of ions measured by the ion amount measuring instrument and the amount of ions necessary for combustion in the internal combustion engine is not within a certain range, the ion generation is performed so as to generate the necessary amount of ions. A control device for an internal combustion engine, further comprising control means for controlling the compressor. The control device according to claim 4, wherein
The control means adjusts the amount of ions generated by the ion generator using a map showing the relationship between the combustion state of the internal combustion engine and the amount of ions on the internal combustion engine side. apparatus. The combustion state of the internal combustion engine is detected by the combustion state detection means,
Measure the amount of ions on the internal combustion engine side with an ion amount measuring device provided on the internal combustion engine side than the ion generator provided on the intake system of the internal combustion engine,
According to the combustion state of the internal combustion engine detected by the combustion state detection means and the distance between the ion generator and the ion amount measuring device, the ions are generated in an amount necessary for combustion in the internal combustion engine. A control method for an internal combustion engine, characterized by being generated by a generator. The combustion state of the internal combustion engine is detected by the combustion state detection means,
Measure the amount of ions on the internal combustion engine side with an ion amount measuring device provided on the internal combustion engine side than the ion generator provided on the intake system of the internal combustion engine,
Measuring the temperature with a temperature measuring device provided between the ion generator and the ion content measuring device, and / or measuring the humidity with a humidity measuring device,
Necessary for combustion in the internal combustion engine according to the combustion state of the internal combustion engine detected by the combustion state detection means, the temperature detected by the temperature measuring device, and / or the humidity detected by the humidity measuring device. A control method for an internal combustion engine, characterized in that an appropriate amount of ions is generated by the ion generator.

Images