JP2008202430A - Control device and control method for internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method for controlling an internal combustion engine, which provides accurately grasping properties of fuel in a fuel tank. <P>SOLUTION: This device is provided with; a storage part 63 storing properties and quantities of fuel stored in the fuel tank 33; a refilling fuel data receiving part 7 receiving refilling fuel data which are properties and quantity of refilling fuel sent form a refilling fuel data sending part provided on refilling facilities 100; a supply quantity calculation part65 calculating supply quantity of fuel supplied to the internal combustion engine 1; a stored fuel calculation part 67 calculating properties and quantity of fuel stored in the fuel tank 33, based on refilling fuel data and stored fuel data, or on a supply quantity and stored fuel data; and fuel data renewal part 68 renewing the store fuel data stored in the storage part 63 with calculated properties and quantity of fuel stored in the fuel tank 33. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a control device and control method for an internal combustion engine, and more particularly to a control device and control method for an internal combustion engine that accurately grasps the properties of fuel in a fuel tank.

  The fuel is supplied to the internal combustion engine by being pumped from the fuel tank in which the fuel is stored to the internal combustion engine in a liquid state by a fuel pump. The fuel in the fuel tank is supplied from an oil supply facility such as an oil station in a liquid state. The fuel supplied from the fueling facility such as a gas station is a different type of fuel such as gasoline, light oil, alcohol fuel (including those containing gasoline), such as gasoline, but the properties are different. There is a homogeneous fuel.

  By the way, depending on the internal combustion engine, there are a fuel that can be operated if it is a homogeneous fuel and a fuel that can be operated even if it is a different fuel. In any internal combustion engine, at the time of refueling, for example, fuel having different properties from the fuel stored in the fuel tank before refueling may be refueled. In this case, the property of the fuel in the fuel tank varies before and after refueling. The property of the fuel in the fuel tank after refueling differs depending on the ratio between the fuel amount in the fuel tank before refueling and the fuel amount of fuel that has been refueled (fuel supply fuel amount). Therefore, in the case where the properties of the fuel stored in the fuel tank before refueling and the properties of the fuel to be refueled are different, the properties of the fuel stored in the fuel tank after refueling are the same as those stored in the fuel tank before refueling. It depends on the properties of the fuel and the amount of stored fuel and the properties of the fuel supplied to the fuel tank and the amount of fuel supplied.

  When the property of the fuel in the fuel tank, that is, the property of the fuel supplied to the internal combustion engine fluctuates, the numerical values of the theoretical air-fuel ratio between air and fuel and the evaporation temperature, which is the temperature at which the fuel evaporates, change. Therefore, if the fuel property in the fuel tank changes, and if the internal combustion engine is controlled so that the property of the supplied fuel does not change, the values of the theoretical air-fuel ratio and the evaporation temperature change. Therefore, it is difficult to perform efficient operation. Therefore, when the fuel property changes, it is necessary to control the operation of the internal combustion engine based on the change in the fuel property, for example, to adjust the fuel injection amount, injection timing, ignition timing, intake air amount, and the like.

  In recent years, an operation control technique for an internal combustion engine based on fuel properties has been proposed. The conventional control device according to Patent Document 1 measures the amount of fuel supplied to the internal combustion engine at the time of acceleration, whereby the amount of fuel supplied to the internal combustion engine at the time of acceleration generated by a change in the properties of the fuel. Change in response is detected. When a change in the response of the amount of fuel supplied to the internal combustion engine during acceleration is confirmed, it is predicted that the property of the fuel supplied to the internal combustion engine has changed, and the response of the fuel injection amount By performing control such as adjusting the response of the fuel injection amount so as to eliminate the advance or delay, efficient operation control of the internal combustion engine is performed.

JP 2002-349319 A

  However, since the conventional control device according to Patent Document 1 predicts a change in the property of fuel supplied to the internal combustion engine from a change in the response of the amount of fuel supplied during acceleration, it is supplied to the internal combustion engine. Therefore, it is difficult to accurately grasp the properties of the fuel stored in the fuel tank serving as the fuel supplied to the internal combustion engine.

  The present invention has been made in view of the above, and an object of the present invention is to provide a control device and a control method for an internal combustion engine that can accurately grasp at least the properties of the fuel in the fuel tank.

  In order to solve the above-described problems and achieve the object, a control device for an internal combustion engine according to the invention includes fuel data storage means for storing as stored fuel data which is a property of a stored fuel and an amount of stored fuel in a fuel tank, Refueling fuel data receiving means for receiving refueling fuel data which is the nature and amount of refueling fuel sent from the refueling fuel data sending means provided in the refueling facility, and supply of fuel supplied to the internal combustion engine When the fuel supply data is received by the supply amount calculation means for calculating the amount and the fuel supply fuel data reception means, the stored fuel data stored in the fuel data storage means and the fuel supply fuel received by the fuel supply fuel data reception means Based on the data, or based on the stored fuel data stored in the fuel data storage means and the supply amount calculated by the supply amount calculation means. Stored fuel calculation means for calculating the property and amount of stored fuel in the fuel tank, and the stored fuel stored in the fuel data storage means based on the calculated property and amount of stored fuel in the fuel tank. And a fuel data updating means for updating data.

  According to the present invention, the control device for an internal combustion engine controls the operation of the internal combustion engine based on the stored fuel data stored by the fuel data storage means.

  Further, according to the present invention, in the control method for an internal combustion engine that is operated and controlled based on the stored fuel data that is the property of the fuel stored in the fuel tank and the amount of stored fuel stored in the fuel data storage means, The procedure for receiving the supplied fuel data, which is the nature and quantity of the supplied fuel, transmitted from the supplied fuel data transmitting means, the stored fuel data stored in the fuel data storage means, and the received fuel Based on the fuel data, it is stored in the fuel data storage means based on the procedure for calculating the property and amount of stored fuel in the fuel tank and the calculated property and amount of stored fuel in the fuel tank. The procedure for updating the stored fuel data, or the procedure for calculating the amount of fuel supplied to the internal combustion engine, and the fuel data storage means Based on the stored fuel data and the calculated supply amount, the procedure for calculating the stored fuel property and the stored fuel amount in the fuel tank, and the calculated stored fuel property and stored fuel amount in the fuel tank And a procedure of updating the stored fuel data stored in the fuel data storage means.

  According to these inventions, when the fuel is supplied to the internal combustion engine, the supply amount of the fuel supplied to the internal combustion engine is calculated, and the internal combustion engine is calculated based on the calculated supply amount and the stored stored fuel data. The property of the stored fuel and the amount of stored fuel in the fuel tank after the engine is stopped are calculated, and the stored stored fuel data is replaced with the calculated stored fuel data and updated. Therefore, it is possible to accurately grasp the property of the stored fuel and the amount of stored fuel immediately before the fuel is supplied by the fuel supply facility, that is, immediately before the fuel supply. And when refueling fuel is refueled from the refueling facility, the properties and amount of fuel in the fuel tank after refueling are calculated from the refueling fuel data received and the stored fuel data stored. The stored stored fuel data, that is, the stored fuel data stored immediately before refueling is replaced with the calculated stored fuel data and updated. Therefore, it is possible to accurately grasp the property and amount of fuel in the fuel tank immediately after the fuel is supplied by the fuel supply facility, that is, immediately after the fuel supply. As a result, it is possible to accurately grasp the property of the stored fuel and the amount of stored fuel in the fuel tank, and therefore, by controlling the operation of the internal combustion engine based on the grasped, that is, stored fuel data, the internal combustion engine The efficiency of engine operation control can be improved.

  Further, according to the present invention, the evaporated fuel calculating means for calculating the property of evaporated fuel and the amount of evaporated fuel every time purge is performed by the evaporated fuel purge device that purges the evaporated fuel generated in the fuel tank to the intake path of the internal combustion engine. The stored fuel calculating means further comprises: the stored fuel in the fuel tank based on the property and the amount of evaporated fuel calculated by the evaporated fuel calculating means and the stored fuel data stored in the fuel data storing means. The characteristics and the amount of stored fuel are calculated.

  Further, in the present invention, a procedure for calculating the property of evaporated fuel and the amount of evaporated fuel every time purge is performed by the evaporated fuel purge device that purges the evaporated fuel generated in the fuel tank into the intake passage of the internal combustion engine, A procedure for calculating the stored fuel property and the stored fuel amount in the fuel tank based on the stored fuel data stored in the fuel data storage means and the calculated evaporated fuel property and evaporated fuel amount. It is characterized by including.

  According to these inventions, when purging of the evaporated fuel generated from the fuel tank is executed, the evaporated fuel data in the purged fuel tank is calculated every time the purge is executed, and the calculated evaporated fuel amount and storage are calculated. The stored fuel data stored in the fuel tank is calculated by calculating the properties of the fuel stored in the fuel tank and the amount of fuel stored in the fuel tank after each purge is executed. Replaced with the properties of the stored fuel and the amount of stored fuel in the fuel tank. Therefore, even if the properties in the fuel tank change due to the purge execution, the properties of the stored fuel and the amount of stored fuel in the fuel tank are calculated corresponding to the changes. The amount of fuel can be accurately grasped.

  The control apparatus for an internal combustion engine according to the present invention has an effect that the property and amount of fuel in the fuel tank can be accurately grasped.

  Hereinafter, a control device for an internal combustion engine according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following examples. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

  FIG. 1 is a diagram illustrating a configuration example of an internal combustion engine according to an embodiment. As shown in FIG. 1, an internal combustion engine 1 according to an embodiment includes an internal combustion engine main body 2, a fuel supply device 3, an intake passage 4, an evaporated fuel processing device 5, and an ECU that controls the operation of the internal combustion engine 1 ( Engine Control Unit) 6. Reference numeral 100 denotes a fueling facility such as a fueling station.

  The internal combustion engine body 2 is composed of a plurality of cylinders (for example, four cylinders). Each cylinder has a combustion chamber (not shown). A mixed gas of fuel and air supplied from the intake passage 4 by the fuel supply device 3 is taken into the fuel chamber via an intake valve (not shown). The inhaled mixed gas is ignited when a spark plug (not shown) provided for each cylinder is ignited and combusted (explosion and expansion) in the combustion chamber. Thereby, a piston (not shown) is reciprocated up and down to generate a rotational force on a crankshaft (not shown). The gas in the fuel chamber after the explosion and expansion is exhausted to an exhaust path (not shown) through a valve (not shown). Here, the spark plug is connected to the ECU 6 and ignites by an ignition signal output from the ECU 6. That is, the ECU 6 performs control such as ignition timing of the spark plug, that is, ignition control. The intake valve and the exhaust valve may be controlled by the ECU 6 such as valve timing and valve lift amount.

  The fuel supply device 3 is a fuel supply unit that supplies fuel to the internal combustion engine 1. The fuel supply device 3 includes a fuel injection valve 31, a fuel pump 32, a fuel tank 33, a fuel pipe 34, a fuel supply pipe 35, and a sub pipe 36. The fuel supply device 3 pumps the fuel stored in the fuel tank 33 through the fuel pipe 34 by the fuel pump 32 and supplies the fuel to the fuel injection valve 31. The fuel injection valve 31 supplies the fuel to the intake passage 4. The fuel is supplied to the internal combustion engine 1 by injection. Here, the embodiment will be described as a port-type fuel injection valve 31 that injects fuel into the intake passage 4 of the internal combustion engine 1. The fuel injection valve 31 according to the present invention is not limited to a port type fuel injection valve. An example of another fuel injection valve is an in-cylinder direct injection fuel injection valve that directly injects fuel into a combustion chamber.

  The fuel injection valve 31 is provided for each cylinder, and injects fuel into each internal combustion engine body 2. The fuel injection valve 31 has a magnetic circuit (not shown) and a needle (not shown) mounted inside. The fuel injection valve 31 generates an electromagnetic force when drive power is supplied from the ECU 6 to the magnetic circuit, and the needle that has been closed by the urging means moves in the direction opposite to the injection direction to open. . Thereby, the fuel filled in the fuel injection valve 31 is injected into the intake passage 4. That is, control of the fuel injection amount and injection timing of the fuel injection valve 31, that is, injection control is performed by the ECU 6.

  The fuel pump 32 pumps the fuel in the fuel tank 33 to the fuel injection valve 31 via the fuel pipe 34. The fuel pump 32 is generally mounted in the fuel tank 32. The fuel pump 32 is repeatedly started and stopped by receiving a signal from the ECU 6, and the pressure of the fuel filled in the fuel pipe 34 is increased by being started.

  The fuel tank 33 temporarily stores the supplied fuel. The fuel tank 33 is generally formed of a steel plate, resin, or the like. The fuel tank 33 has a different shape depending on the type of vehicle or the like, a capacity, an application, and the like, and is formed in a shape that considers adjacent to other parts, for example, a bowl shape. The fuel tank 33 is generally provided with a fuel gauge indicating the remaining amount of fuel, and sends a signal to a meter panel (not shown) mainly based on the ups and downs of a resin float. Therefore, the fuel gauge generally displayed on the meter panel does not display the accurate amount of fuel in the fuel tank.

  The fuel pipe 34 is a pipe for connecting the fuel tank 33 and each fuel injection valve 31. The fuel pipe 34 includes, for example, a fuel delivery pipe (not shown) to which each fuel injection valve 31 is directly connected, and a connection pipe that connects the fuel delivery pipe and the fuel tank 33. The fuel pipe 34 is provided with a branch pipe that branches from the middle and returns the fuel to the fuel tank 33. The branch pipe is provided with a back pressure valve (not shown) on the way. Thereby, when the fuel pump 32 starts, the pressure of the fuel pumped to the fuel injection valve 31 is kept constant.

  The oil supply pipe 35 is a pipe for supplying the fuel supplied from the fuel supply facility 100 to the fuel tank 33. The fuel injection port 35a of the fuel supply pipe is provided with a detachable fuel supply cap, and the leakage of fuel or steam fuel is suppressed by closing the cap.

  The auxiliary pipe 36 is a pipe connected between the upper portion of the fuel tank 33 and the vicinity of the fuel supply inlet 35a separately from the fuel supply pipe 35. The sub-pipe 36 is constituted by a pipe that is narrower than the fuel supply pipe 35. When the fuel is supplied to the fuel tank 33, the sub-pipe 36 mainly secures a escape place for the evaporated fuel in the fuel tank 33 and enters the fuel supply inlet 35a. Plays a role to release.

  The intake path 4 introduces air from outside into a fuel chamber (not shown) of each cylinder of the internal combustion engine body 2. The intake path 4 includes an air cleaner 41, an air flow meter 42, a throttle valve 43, a surge tank 44, and an intake passage 45 that communicates from the air cleaner 41 to the combustion chamber of the internal combustion engine body 2. .

  The air cleaner 41 is provided on the most upstream side of the intake passage 4 and removes dust from the taken-in outside air. The air from which the dust has been removed by the air cleaner 41 is mixed with the fuel injected into the intake passage 4 by each fuel injection valve 31, and as a mixed gas, each combustion (not shown) of the internal combustion engine body 2 via the intake passage 45 is performed. Introduced into the room. The air flow meter 42 is provided on the downstream side of the air cleaner 41. The air flow meter 42 detects the intake air amount introduced into each fuel chamber of the internal combustion engine body 2, that is, the intake air, and outputs it to the ECU 6. The throttle valve 43 is provided on the downstream side of the air flow meter 42. The throttle valve 43 is driven by an actuator 43a such as a stepping motor, and adjusts the amount of intake air taken into the combustion chamber of each cylinder of the internal combustion engine body 2. The control of the opening degree of the throttle valve 43, that is, the throttle valve opening degree control is performed by the ECU 6. The surge tank 44 is provided on the downstream side of the throttle valve 43 and is configured as a path having a larger cross-sectional area than the intake path 45. The surge tank 44 is connected to an evaporative fuel pipe 53 (to be described later) of the evaporative fuel processing device 5.

  The evaporative fuel processing device 5 stores the evaporative fuel generated in the fuel tank 33 in the fuel supply device 3, and introduces it into the intake passage 4 to suppress the evaporative fuel from being released to the outside. Is. The evaporative fuel processing device 5 includes an evaporative fuel pipe that communicates the fuel tank 33 and the surge tank 44 in the intake passage 4 via the canister 51, the evaporative fuel purge device 52, the canister 51, and the evaporative fuel purge device 52. 53.

  The canister 51 temporarily stores the evaporated fuel generated in the fuel tank 33. The canister 51 has an adsorbent such as activated carbon disposed therein. The canister 51 communicates with the fuel tank 33 via the evaporated fuel pipe 53. Accordingly, the evaporated fuel generated in the fuel tank 33 is introduced into the canister 51 via the evaporated fuel pipe 53 and is adsorbed by an adsorbent such as activated carbon. The canister 51 communicates with the surge tank 44 in the intake path 4 via the evaporated fuel pipe 53.

  The evaporative fuel purging device 52 shuts off the evaporative fuel pipe 53 and releases the shut-off. The evaporative fuel stored in the canister 51 is introduced into the supply path 4 by releasing the cutoff of the evaporative fuel pipe 53 ( Purging). The evaporative fuel purge device 52 is disposed in a path of an evaporative fuel pipe 53 that communicates the canister 51 and the surge tank 44 in the intake path 4. The evaporative fuel purging device 52 shuts off the evaporative fuel pipe 53 in a state where it is not driven by the ECU 6, that is, a valve closed state, and shuts off the path of the evaporative fuel.

  The evaporated fuel purge device 52 is equipped with an actuator. The evaporative fuel purging device 52 is driven by the ECU 6 after a purge execution condition to be described later, and releases the cutoff of the evaporative fuel pipe 53 in a state where the actuator is driven by the ECU 6, that is, in a valve open state, thereby blocking the evaporative fuel path. To release. Here, the ECU 6 controls the drive of the actuator based on the duty ratio. Accordingly, the drive frequency of the actuator, that is, the flow rate per unit time of the evaporated fuel passing through the evaporated fuel pipe 53 by the evaporated fuel purge device 52 is based on the duty ratio determined by the ECU 6. Further, the drive time of the actuator, that is, the release time for releasing the cutoff of the evaporated fuel pipe 53 by the evaporated fuel purge device 52 is based on the control time for controlling the drive of the actuator by the duty ratio determined by the ECU 6. The evaporated fuel adsorbed by the canister 51 is introduced into the intake passage 4 through the evaporated fuel pipe 53 by releasing the cutoff of the evaporated fuel pipe 53 by the actuator. As a result, the evaporated fuel generated in the fuel tank 33 is introduced into the intake passage 4 via the evaporated fuel processing device 5 and is then introduced into the combustion chamber (not shown) of the internal combustion engine body 2 and burned.

  The ECU 6 controls the operation of the internal combustion engine 1. The ECU 6 has at least functions as fuel oil data acquisition means, stored fuel calculation means, supply amount calculation means, evaporated fuel calculation means, and fuel data update means. Various input signals are input to the ECU 6 from sensors attached to various parts of the apparatus on which the internal combustion engine 1 is mounted. Specifically, the amount of intake air detected by the air flow meter 42, the crank angle detected by a crank angle sensor attached to a crankshaft (not shown), the accelerator opening detected by an accelerator pedal sensor (not shown), A (not shown) The air-fuel ratio detected by the / F sensor. The ECU 6 outputs various output signals based on these input signals and various maps stored in the storage unit 63. Specifically, an output signal such as an injection signal for controlling the injection of the fuel injection valve 31, a throttle valve opening signal for controlling the throttle valve opening of the throttle valve 43, an ignition signal for controlling ignition of a spark plug (not shown), and the like. and so on.

  Note that the fuel injection amount supplied from the fuel injection valve 31 to the internal combustion engine 1 is calculated based on the engine speed, intake air amount, accelerator opening, and the like obtained from the crank angle among these input signals. The fuel injection amount may be calculated based on the input signal and a fuel injection amount map stored in the storage unit 63, or may be calculated based on the input signal and an empty state detected by an A / F sensor (not shown). It may be calculated based on the fuel ratio.

  The ECU 6 includes an input / output port (I / O) 61 that inputs and outputs the input signal and output signal, a processing unit 62, and a storage unit 63 that stores various maps such as the fuel injection amount map. ing. The processing unit 62 includes a memory and a CPU (Central Processing Unit), and at least a fuel supply fuel data acquisition unit 64 that is a fuel supply fuel data acquisition unit, a supply amount calculation unit 65 that is a supply amount calculation unit, and an evaporated fuel calculation unit. The evaporative fuel calculation unit 66, the stored fuel calculation unit 67 that is a stored fuel calculation unit, and the fuel data update unit 68 that is a fuel data update unit.

  The storage unit 63 is a nonvolatile memory such as a flash memory, a volatile memory such as a ROM (Read Only Memory) or a volatile memory such as a RAM (Random Access Memory) that can be read and written. Or a combination thereof. The memory | storage part 63 preserve | saves the property and fuel amount of stored fuel as stored fuel data.

  The fuel supply fuel data acquisition unit 64 acquires the fuel supply fuel data that is the property of the fuel supply fuel and the amount of fuel supply fuel. The refueling fuel data acquisition unit 64 receives the refueling fuel data received by the refueling fuel data receiving unit 7, that is, refueling fuel data transmitted from a refueling fuel data transmission unit 101 described later, via an input / output port (I / O) 61. Get.

  The supply amount calculation unit 65 calculates the supply amount of fuel supplied to the internal combustion engine 1. For example, the supply amount calculation unit 65 is based on an accelerator opening detected by an accelerator pedal sensor (not shown), an intake air amount detected by an air flow meter 42, an air-fuel ratio detected by an A / F sensor (not shown), and the like. The amount of fuel supplied to the internal combustion engine 1 is calculated based on the calculated fuel supply amount, that is, the fuel injection amount injected by each fuel injection valve 31. The supply amount calculation unit 65 calculates the supply amount of the fuel supplied to the internal combustion engine 1 during the operation of the internal combustion engine 1, that is, from the start of the operation of the internal combustion engine 1 to the stop of the operation. To do.

  The evaporative fuel calculation unit 66 calculates the property and evaporative fuel amount of the evaporative fuel purged by the evaporative fuel processing device 5 into the intake passage 4 of the internal combustion engine 1. The evaporated fuel calculation unit 66 predicts the property of the evaporated fuel purged into the intake passage 4 from the property of the stored fuel and the property information of the fuel stored in the storage unit 63. The evaporated fuel calculation unit 66 calculates the evaporated fuel amount based on the duty ratio determined by the ECU 6 for each purge execution and the control time during which the ECU 6 drives and controls the actuator based on the determined duty ratio. For example, the evaporated fuel calculation unit 66 calculates the evaporated fuel amount from the duty ratio, the control time, and the evaporated fuel amount map that determines the evaporated fuel amount from the duty ratio and the control time stored in advance in the storage unit 63. And predict. The evaporated fuel amount map is based on the measured value of the evaporated fuel amount actually measured by executing the purge at each duty ratio and each control time used when actually performing the purge through experiments or the like in advance. May be set. The evaporated fuel amount calculated by the evaporated fuel calculating unit 66 is an evaporated fuel amount calculated as a gas, and conversion to a fuel amount as a liquid is calculated by a stored fuel calculating unit 67 described later. In the evaporative fuel map, for example, a correspondence relationship between the duty ratio, the control time, and the evaporative fuel amount is set on the basis of the negative pressure generated in the intake passage 4 during purge execution.

  The stored fuel calculation unit 67 uses the stored fuel data stored in the storage unit 63 and the refueling fuel data received by the refueling fuel data acquisition unit 64 when the refueling fuel data acquisition unit 64 receives the refueling fuel data. Based on this, the properties of the stored fuel and the stored fuel amount are calculated. That is, the stored fuel calculation unit 67 calculates the stored fuel property and the stored fuel amount after refueling based on the stored fuel property and the stored fuel amount before refueling, and the supplied refueled fuel property and the refueled fuel amount. To do. Specifically, the amount of stored fuel after refueling is calculated by adding the amount of fuel supplied to the amount of stored fuel before refueling. Next, the properties of the stored fuel after refueling are based on, for example, the properties of the stored fuel before refueling, the properties of the refueled fuel, and the ratio of the stored fuel amount before refueling and the refueled fuel amount to the stored fuel amount after refueling. Is calculated. Accordingly, the stored fuel calculation unit 67 can calculate the stored fuel amount after refueling when the stored fuel amount changes due to refueling. The stored fuel calculation unit 67 can calculate the properties of the stored fuel after refueling when the properties of the stored fuel before refueling and the properties of the fuel supply fuel are different.

  The stored fuel calculation unit 67 is based on the stored fuel data stored in the storage unit 63 and the supply amount calculated by the supply amount calculation unit 65 when the internal combustion engine 1 is operated and the operation is stopped. The properties of the stored fuel and the stored fuel amount are calculated. That is, the stored fuel calculation unit 67 calculates the stored fuel property and the stored fuel amount based on the stored fuel property and the stored fuel amount before refueling and the supply amount calculated by the supply amount calculation unit 65. Specifically, the amount of stored fuel after the operation of the internal combustion engine 1 is stopped is supplied to the internal combustion engine 1 from the start of operation of the internal combustion engine 1 until the operation is stopped from the amount of stored fuel before the operation of the internal combustion engine 1. Subtract the amount of fuel supplied. Accordingly, the stored fuel calculation unit 67 can calculate the stored fuel amount after the operation is stopped and particularly before refueling when the stored fuel amount of the stored fuel changes due to the supply of fuel to the internal combustion engine 1. it can.

  The stored fuel calculation unit 67 stores the stored fuel data stored in the storage unit 63 every time purge is performed and the property of the evaporated fuel and the amount of evaporated fuel calculated by the evaporated fuel calculation unit 66 when the purge is determined to be performed. Based on the above, the properties of the stored fuel and the fuel amount are calculated. That is, the stored fuel calculation unit 67 uses the evaporated fuel amount calculated by the evaporated fuel calculation unit 66 when the evaporated fuel is introduced into the intake passage 4 by the evaporated fuel processing device 5, that is, the amount of fuel as gas as a liquid. Convert to the amount of fuel. The amount of stored fuel after purging is calculated by subtracting the amount of evaporated fuel converted to the amount of fuel as liquid from the amount of fuel stored before purging. Next, the properties of the stored fuel after purging are, for example, the properties of the stored fuel before purging, the properties of the evaporated fuel, the stored fuel amount before purging with respect to the stored fuel amount after purging, and the fuel as liquid It is calculated based on the ratio of the evaporated fuel amount converted to the amount. Accordingly, the stored fuel calculation unit 67 can calculate the stored fuel amount after the purge is executed when the stored fuel amount is changed by the purge execution. Further, the stored fuel calculation unit 67 can calculate the property of the stored fuel after the purge is executed.

  The fuel data update unit 68 updates the stored fuel data stored in the storage unit 63 with the properties of the stored fuel and the stored fuel amount calculated by the stored fuel calculation unit 67. As a result, when the properties of the stored fuel and the amount of stored fuel change, such as when fuel is supplied, when fuel is supplied to the internal combustion engine 1, or when purging is performed, the properties of the stored fuel and the storage after the change are changed. The fuel amount can be stored in the storage unit 63 as stored fuel data.

  The refueling fuel data receiving unit 7 is a refueling fuel data receiving unit and receives refueling fuel data transmitted from a refueling fuel data transmitting unit 101 described later. The fuel supply fuel data receiving unit 7 outputs the fuel supply fuel data received by the fuel supply fuel data receiving unit 7 to the ECU 6. The refueling fuel data receiving unit 7 may be configured separately from the ECU 6 or may be configured in the ECU 6 as a part of the function of the ECU 6.

  The fuel supply facility 100 is a fuel supply place such as a gas station that supplies fuel to the fuel tank 33. The fuel stored in the fueling facility 100 is configured by mixing various organic compounds, and the case where the same type of fuel is stored and the case where the different type of fuel is stored are stored. In some cases, both homogeneous and heterogeneous fuels are stored. Here, the different types of fuels refer to fuel types based on various conditions such as the composition of the fuel, the weight ratio of a predetermined organic compound contained in the fuel, the octane number, and the alcohol weight ratio if it is an alcohol-containing fuel. In this standard, the fuels are different types and have different properties. Examples of different types of fuel include gasoline, light oil, and alcohol-containing fuel. On the other hand, the same type of fuel means the same type of fuel in the above standard. The same type of fuel includes, for example, high-octane gasoline having a high octane number and regular gasoline having a low octane number. Therefore, even if the type of fuel is the same type, there are also types of the same type of fuel that have different properties due to differences in the purification method and the mixing ratio of the organic compounds to be configured.

  As a result, when fuel different from the fuel stored in the fuel tank 33 is supplied from the fuel supply facility 100 to the fuel tank 33, the properties of the fuel supplied to the fuel tank 33 and the fuel tank 33 before refueling. Since the properties of the stored fuel are different, the properties of the fuel in the fuel tank 33 before and after refueling vary. In addition, even when fuel of the same quality as the fuel stored in the fuel tank 33 is supplied from the fuel supply facility 100 to the fuel tank 33, the properties of the fuel supplied to the fuel tank 33 and the fuel tank 33 before fueling are supplied. Since the properties of the stored fuel stored in the fuel tank may be different from each other, the properties of the fuel in the fuel tank 33 before and after refueling may vary. Here, the property of the fuel is a parameter indicating a certain characteristic of the fuel, such as the composition of the fuel, the weight ratio of a predetermined organic compound contained in the fuel, the octane number, and the alcohol weight ratio if it is an alcohol-containing fuel. It is represented by at least one of them.

  The fuel stored in the fuel supply facility 100 includes a composition such as an organic compound having high volatility, that is, a fuel component having high volatility. Therefore, when fuel is supplied from the fuel supply facility 100 to the fuel tank 33 as liquid fuel, the highly volatile fuel component is evaporated in the fuel tank 33 storing the supplied fuel and exists as evaporated fuel.

  In addition, the refueling facility 100 is provided with a refueling fuel data transmission unit 101 that transmits refueling fuel data that is the nature and amount of refueling fuel to be refueled. The fuel supply data transmission unit 101 is a transmission device capable of transmitting information in at least one direction, for example, by an antenna or the like. After the fuel tank 33 has been refueled, the refueling fuel data transmitting unit 101 transmits the properties of the refueling fuel and the refueling fuel amount supplied from the refueling facility 100 as refueling fuel data.

  Here, the property of the fuel supply fuel is the property of the fuel stored in the fuel supply facility 100 and supplied to the fuel tank 33. On the other hand, the amount of fuel supplied is the amount of fuel supplied to the fuel tank 33 from the start to the end of fuel supply to the fuel tank 33, that is, by one fuel supply. Thereby, the fuel supply fuel data receiving unit 7 can receive the fuel supply fuel data transmitted by the fuel supply fuel data transmission unit 101.

  Next, a method for grasping the properties and amount of fuel in the fuel tank according to the embodiment, that is, a control method for the internal combustion engine will be described. FIGS. 2-1 and 2-2 are diagrams illustrating a flow of the control method of the internal combustion engine according to the embodiment. Note that “1” illustrated in FIG. 2A is connected to “1” illustrated in FIG. 2B, and configures one flow with FIGS. 2A and 2B. In the control method for the internal combustion engine shown in FIGS. 2-1 and 2-2, as an example, the fuel is divided into a highly volatile component A and another component B, and the properties are the total weight of the fuel (A + B). ) A to volume ratio.

  First, as shown in FIG. 2A, the refueling fuel data acquisition unit 64 of the processing unit 62 determines whether or not refueling fuel data has been received (step ST1). When the fuel is supplied to the fuel tank 33 by the fuel supply facility 100 and the fuel supply is completed, the fuel supply fuel data transmission unit 101 of the fuel supply facility 100 transmits the fuel supply fuel data. When the refueling fuel data is transmitted from the refueling fuel data transmitting unit 101, the refueling fuel data acquiring unit 64 receives the refueling fuel data received by the refueling fuel data receiving unit 7 and whether the refueling fuel data is output to the ECU 6. Judge whether or not.

  Next, when it is determined that the refueling fuel data has been received (Yes in step ST1), the refueling fuel data acquisition unit 64 acquires the refueling fuel data, that is, the property (Sin) and the refueling fuel amount (Qin) of the refueling fuel (step ST2). ). Here, the refueling fuel data acquisition unit 64 acquires the properties (Sin) and the refueling fuel amount (Qin) of the refueling fuel actually supplied to the fuel tank 33 via the refueling fuel data receiving unit 7. In addition, if it determines that the fuel supply fuel data acquisition part 64 has not received fuel supply fuel data (step ST1 negative), it will progress to following step ST6. For example, it is assumed that the property of the refueling fuel that is the received refueling fuel data, that is, the volume ratio of A is Sin = 30% and the refueling fuel amount is Qin = 50L.

  Next, the stored fuel calculation unit 67 acquires the stored fuel data stored in the storage unit 63, that is, the property (Ssave) and the stored fuel amount (Qsave) of the stored fuel (step ST3). For example, in the stored fuel data, the property of the stored fuel, that is, the volume ratio Ssave of the stored fuel Ssave = 15%, and the stored fuel amount is Qsave = 10L.

  Next, the stored fuel calculation unit 67, based on the acquired stored fuel data and the refueling fuel data acquired by the refueling fuel data acquisition unit 64, the property (Ssup) and the amount of stored fuel (Qsup = Qsave + Qin) Is calculated (step ST4). Here, the stored fuel calculation unit 67 determines the properties (Ssave) and the amount (Qsave) of the stored fuel in the fuel tank 33 before refueling, and the properties of the refueled fuel supplied to the fuel tank 33 by the refueling facility 100 ( Based on (Sin) and the amount of fuel supplied (Qin), the property (Ssup) and the amount of stored fuel (Qsup) of the stored fuel after refueling are calculated. Specifically, the stored fuel amount (Qsup) after refueling is calculated by adding the refueled fuel amount (Qin) of the fuel supplied to the stored fuel amount (Qsave) before refueling (Qsup = Qsave + Qin). . Further, the property (Ssup) of the fuel after refueling includes the property (Ssave) of the stored fuel before refueling, the property (Sin) of the refueled fuel, and the stored fuel amount before refueling with respect to the stored fuel amount (Qsup) after refueling. It is calculated based on the ratio of (Qsave) and the amount of fuel supply (Qin). For example, the amount of stored fuel after refueling Qsup = Qsave + Qin = 10 + 50 = 60L. Further, the property of stored fuel after refueling is Ssup = Ssave × (Qsave / Qsup) + Sin × (Qin / Qsup) = 15 × (10/60) + 30 × (50/60) = 27.50.

  Next, the fuel data update unit 68 updates the stored fuel data stored in the storage unit 63 (step ST5). Here, the fuel data update unit 68 stores the stored fuel data (Ssave) and the stored fuel amount (Qsave), which are stored fuel data stored in the storage unit 63, calculated by the stored fuel calculation unit 67. The stored fuel data stored in the storage unit 63 is updated by rewriting the property (Ssup) and the stored fuel amount (Qsup). As a result, the stored fuel property (Ssave) and the stored fuel amount (Qsave), which are stored fuel data stored in the storage unit 63, are changed to the stored fuel property (Ssup) and the stored fuel amount (Qsup) after refueling. Replaced. For example, the properties of the stored fuel after refueling and the stored fuel amount, which are stored fuel data, are the values of Ssup and Qsup described above, and therefore, Ssave = 27.50% and Qsave = 60L, respectively.

  Next, the supply amount calculation unit 65 determines whether or not the internal combustion engine 1 is in operation (step ST6). Here, the processing unit 62 of the ECU 6 operates the internal combustion engine 1 depending on whether, for example, the ignition is ON, regardless of whether the fuel supply fuel calculation unit 64 receives the fuel supply fuel data in step 1 above. Determine if it is in the middle. When it is determined that the internal combustion engine 1 is not in operation (No in step ST6), the supply amount calculation unit 65 of the ECU 6 ends the control method for the internal combustion engine.

  When it is determined that the internal combustion engine 1 is in operation (Yes in step ST6), the supply amount calculation unit 65 calculates and integrates the supply amount of fuel supplied to the internal combustion engine 1 (step ST7). The supply amount calculation unit 65 integrates the supply amount (Qout) of the fuel supplied to the internal combustion engine 1 from the start of the operation of the internal combustion engine 1 regardless of whether or not the purge is executed. The supply amount calculation unit 65 continues to accumulate during the operation of the internal combustion engine 1, that is, from step ST7 until it is determined that the operation of the internal combustion engine 1 is completed in step ST14 described later.

  Next, the evaporated fuel calculation unit 66 determines whether or not the purge is executed (step ST8). The purge is performed when a predetermined purge execution condition is satisfied by the processing unit 62 of the ECU 6. Here, one of the purge execution conditions is that the internal combustion engine 1 is in operation. If the internal combustion engine 1 is in operation, negative pressure is generated in the intake passage 4. Therefore, if purge is performed by the evaporative fuel processing device 5, evaporative fuel in the canister 51 is introduced into the intake passage 4 and together with the supplied fuel supplied from the fuel supply device 3 to the internal combustion engine 1 in a fuel chamber (not shown). It is because it is burned. Further, other purge execution conditions include that the amount of intake air introduced into the intake path 4 is not less than a certain value, no abnormality is confirmed in each sensor and actuator system, the cooling water temperature is not less than a certain value, There is no purge prohibition request, or the learning of the degree of influence by the purge executed before the purge execution has been completed.

  Next, when the evaporated fuel calculation unit 66 determines that the purge has been executed (Yes in Step ST8), the evaporated fuel processing device 5 purges the property (Sp) and the evaporated fuel amount (qp) of the evaporated fuel. Calculate (step ST9). In a specific method for calculating the property (Sp) of the evaporated fuel, the evaporated fuel calculation unit 66 calculates the property of the evaporated fuel based on the stored fuel property in the stored fuel data stored in the storage unit 63. Here, if the properties of the stored fuel are known, highly volatile fuel components can be predicted. Therefore, the evaporative fuel calculation unit 66 predicts a highly volatile fuel component from the properties of the stored fuel, and is purged by the evaporative fuel based on the predicted highly volatile fuel component, that is, the evaporative fuel processing device 5, and the fuel tank The property (Sp) of the evaporated fuel evaporated from the inside 33 is calculated. If the ECU 6 determines that the purge is not executed (No in step ST8), the ECU 6 proceeds to step ST13 described later. For example, the evaporated fuel is basically the volatile component A of the stored fuel, so the property Sp of the purged evaporated fuel is Sp = 100%.

  Further, in the method for calculating the evaporated fuel amount (qp), the evaporated fuel calculating unit 66 controls the drive of the actuator provided in the evaporated fuel purge device 52 every time purge is performed when the evaporated fuel processing device 5 performs the purge. The evaporated fuel amount (qp) is calculated from the evaporated fuel amount map that determines the evaporated fuel amount from the control time, the duty ratio, the duty ratio and the control time stored in advance in the storage unit 63, and predicted. The evaporated fuel amount map is based on the measured value of the evaporated fuel amount actually measured by executing the purge at each duty ratio and each control time used when actually performing the purge through experiments or the like in advance. May be set. Here, the amount of evaporated fuel calculated by the evaporated fuel calculation unit 66 is the amount of evaporated fuel calculated as gas, and conversion to the amount of fuel as liquid is calculated in step ST11 described later. For example, the purged evaporated fuel amount qp = 2L.

  Next, the stored fuel calculation unit 67 acquires the stored fuel data stored in the storage unit 63, that is, the property (Ssave) and the stored fuel amount (Qsave) of the stored fuel (step ST10). For example, the stored fuel data stored in the storage unit 63, that is, the property of the stored fuel and the stored fuel amount are the above-described stored fuel property Ssup = 27.50% and the stored fuel amount Qsup = 60L. Ssave = 27.50% and Qsave = 60L, respectively.

  Next, the stored fuel calculation unit 67 stores the stored fuel which is the stored fuel data stored in the storage unit 63 and the property (Sp) and the evaporated fuel amount (qp) of the evaporated fuel calculated by the evaporated fuel calculation unit 66. Based on the property (Ssave) and the stored fuel amount (Qsave), the stored fuel property (Sliq = Ssave-Sp) and the stored fuel amount (Qliq = Qsave-Qp), which are the stored fuel data after purging, are calculated. (Step ST11). Here, the evaporated fuel amount (qp) calculated by the evaporated fuel calculation unit 66 is an evaporated fuel amount calculated as a gas, and conversion by liquid is calculated by the stored fuel calculation unit 67. For example, if the correction coefficient for the fuel amount when the gas is converted to liquid is C, the evaporated fuel amount (Qp) when converted as a liquid can be calculated by Qp = qp × C. Here, the correction coefficient C of the evaporated fuel amount when this gas is converted into a liquid is a coefficient derived in advance by an experiment or the like performed under a predetermined purge execution condition, and is stored in the storage unit 63. For example, if the value of the correction coefficient (C) of the evaporated fuel amount when the gas is converted to liquid is 0.05, the evaporated fuel amount Qp = qp × C = 2 × 0.05 = 0. 1L.

  The stored fuel amount (Qliq) after the purge is performed is calculated by subtracting the evaporated fuel amount (Qp) from the stored fuel amount (Qsave) before the purge is performed (Qliq = Qsave−Qp). For example, the stored fuel amount after execution of purge is Qliq = Qsave−Qp = 60−0.1 = 59.90L. The properties (Sliq) of the stored fuel after the purge is performed are the properties (Ssave) of the stored fuel before the purge is performed, the properties (Sp) of the evaporated fuel, and the stored fuel amount (Qliq) after the purge is performed. Is calculated based on the ratio of the stored fuel amount (Qsave) and the evaporated fuel amount (Qp) before the purge is performed. For example, the property of the stored fuel after the purge is performed is Sliq = Ssave−Sp × (Qp / save) = 27.5−100 × (0.1 / 60) = 27.33%.

  Next, the fuel data update unit 68 updates the stored fuel data stored in the storage unit 63 (step ST12). Here, the fuel data updating unit 68 is a fuel tank in which the evaporated fuel calculation unit 66 calculates the stored fuel property (Ssave) and the stored fuel amount (Qsave), which are stored fuel data stored in the storage unit 63. The stored fuel data stored in the storage unit 63 is updated by substituting the property (Sliq) and the stored fuel amount (Qliq) of the stored fuel in 33. As a result, the property (Ssave) and the amount of stored fuel (Qsave) of the stored fuel are replaced with the property of the stored fuel (Sliq) and the amount of stored fuel (Qliq), which are stored fuel data after the purge is executed. For example, the stored fuel property and the stored fuel amount, which are stored fuel data, are the above-described stored fuel property Sliq and the stored fuel amount Qliq after the purge, so that Ssave = 27.33% and Qsave = 59.90 L, respectively. Become.

  Next, the stored fuel calculation unit 67 determines whether or not the operation of the internal combustion engine 1 has been stopped (step ST13). Here, the processing unit 62 of the ECU 6 determines whether or not the operation of the internal combustion engine 1 is stopped based on, for example, whether or not the ignition is OFF.

  Next, when the stored fuel calculation unit 67 determines that the operation of the internal combustion engine 1 has stopped (Yes in step ST13), the stored fuel calculation unit 67 stores stored fuel that is stored fuel data stored in the storage unit 63. The property (Ssave) and the amount of stored fuel (Qsave) are acquired (step ST14). When the stored fuel calculation unit 67 determines that the operation of the internal combustion engine 1 is not stopped (No in step ST13), the supply amount calculation unit 65 supplies the internal combustion engine 1 from the start of operation of the internal combustion engine 1 in step ST7. The amount of fuel supplied is accumulated. That is, the supply amount calculation unit 65 integrates the supply amount of the fuel supplied to the internal combustion engine 1 until it is determined by the stored fuel calculation unit 67 that the operation of the internal combustion engine 1 has stopped (Yes in step ST13). Become. Therefore, when the stored fuel calculation unit 67 determines that the operation of the internal combustion engine 1 is stopped (Yes in step ST13), the supply amount of the fuel supplied to the internal combustion engine 1 accumulated by the supply amount calculation unit 65 is the internal combustion engine. This is the supply amount (Qout) from the start of operation of the engine 1 to the stop. For example, the supply amount Qout supplied to the internal combustion engine 1 from the start to the stop of the internal combustion engine 1 is set to 49.90L.

  Next, the stored fuel calculation unit 67 is based on the supply amount (Qout) of the fuel supplied to the internal combustion engine 1 and the stored fuel amount (Qsave) that is stored fuel data stored in the storage unit 63. The amount of stored fuel (Quse) after the operation of the internal combustion engine 1 is stopped is calculated (step ST15). Specifically, the stored fuel amount (Quse) after the internal combustion engine 1 is stopped is calculated by adding the calculated supply amount (Qout) to the stored fuel amount (Qsave) stored before the internal combustion engine 1 is operated. It is calculated by subtraction (Quse = Qsave−Qout). For example, the amount of stored fuel Quse = Qsave−Qout = 59.90−49.90 = 10 L after the operation of the internal combustion engine 1 is stopped. The fuel in the fuel tank 33 is supplied to each fuel injection valve 31 in a liquid state, and is supplied to the internal combustion engine 1 via each fuel injection valve 31. Therefore, the fuel supplied to the internal combustion engine 1 via each fuel injection valve 31 has the same properties as the stored fuel in the fuel tank 33. That is, the property (Ssave) of the fuel stored in the fuel tank 33 after the operation of the internal combustion engine 1 is stopped does not change when the fuel is supplied to the internal combustion engine 1 via the fuel supply device 3. For example, the amount of stored fuel Suse = Ssave = 27.33% after the operation of the internal combustion engine 1 is stopped.

  Next, the fuel data update unit 68 updates the stored fuel data stored in the storage unit 63 (step ST16). Here, the fuel data update unit 68 uses the stored fuel amount (Quse) that is the fuel data calculated by the stored fuel calculation unit 67 to store the fuel amount of the stored fuel that is stored fuel data stored in the storage unit 63. (Qsave) is updated. Thereby, the stored fuel amount (Qsave) of the stored fuel data stored in the storage unit 63 is replaced with the calculated supply amount (Quse). For example, since the stored fuel properties Suse and the stored fuel amount Quse after the operation of the internal combustion engine 1 is stopped, Suse = 27.33% and Quse = 10L, respectively.

  Next, the supply amount calculation unit 65 sets Qout = 0 (step ST17).

  As described above, when the fuel is supplied to the internal combustion engine 1, the supply amount (Qout) of the fuel supplied from the start to the stop of the internal combustion engine 1 is calculated, and the calculated supply amount (Qout) and After the operation of the internal combustion engine 1 is stopped based on the stored fuel data that is stored, that is, immediately after refueling, after the purge is performed, or stored fuel data (Ssave, Qsave) after the purge is not performed and the internal combustion engine 1 is stopped. The stored fuel amount (Quse) in the fuel tank 33 is calculated, and the stored stored fuel data (Ssave, Qsave) is replaced with the calculated stored fuel data (Ssave, Qout). The fuel data (Ssave, Qsave) is updated. Therefore, it is possible to accurately grasp the property (Ssave) and the amount of stored fuel (Qsave) of the stored fuel in the fuel tank 33 immediately before fuel is supplied by the fueling facility 100, that is, immediately before fueling.

  And when the fuel supply fuel is supplied from the fuel supply facility 100, the received fuel supply fuel data (Sin, Qin), that is, an accurate property of the fuel supply fuel (Sin) and an accurate amount of fuel supply (Qin) are stored. The stored fuel data, that is, the exact stored fuel property (Ssave) in the fuel tank 33 immediately before refueling and the exact stored fuel amount (Qsave), the stored fuel property in the fuel tank 33 after refueling ( Ssup) and the amount of stored fuel (Qsup) are calculated, and the stored fuel data (Ssup, Qsup) stored storage data, that is, the stored fuel data (Ssave, Qsave) stored immediately before refueling is calculated. The stored fuel data (Ssave, Qsave) immediately before refueling that has been saved is updated. Therefore, the property (Ssave) and the amount of stored fuel (Qsave) of the stored fuel in the fuel tank 33 immediately after the fuel is supplied by the fuel supply facility 100, that is, immediately after the fueling, can be accurately grasped.

  Further, when purging of the evaporated fuel generated from the fuel tank 33 is executed, the evaporated fuel data (Sp, Qp) in the fuel tank 33 purged every time the purge is executed is calculated, and the calculated evaporated fuel amount ( Qp), the stored fuel property (Ssave) in the fuel tank 33 and the stored fuel amount (Qsave), the stored fuel property (Sliq) in the fuel tank 33 after each purge execution and the stored fuel The amount (Qliq) is calculated, and the stored stored fuel data (Ssave, Qsave) is replaced with the calculated property (Sliq) and stored fuel amount (Qliq) of the stored fuel in the fuel tank 33, and updated (Ssave). , Qsave). Therefore, even if the property in the fuel tank 33 changes due to the purge execution, the property (Ssave) and the amount of stored fuel (Qsave) of the stored fuel in the fuel tank 33 are calculated corresponding to the change. The property (Ssave) and the amount of stored fuel (Qsave) of the stored fuel in 33 can be accurately grasped. As a result, the property (Ssave) and the amount of stored fuel (Qsave) of the fuel stored in the fuel tank 33 immediately before refueling can be grasped more accurately. Therefore, the property (Ssave) of the fuel stored in the fuel tank 33 immediately after refueling. ) And the amount of stored fuel (Qsave) can be grasped more accurately.

  As a result, even if the properties of the fuel supplied to the internal combustion engine 1 change, and the stoichiometric air-fuel ratio, the evaporation temperature, and the like change, the properties of the stored fuel in the fuel tank 33 and the exact value of the stored fuel amount are stored. Since the data is stored as data (Ssave, Qsave), the operation of the internal combustion engine 1 is controlled based on the stored fuel storage data (Ssave, Qsave), thereby performing efficient operation control of the internal combustion engine 1. Can do. Therefore, based on the stored fuel data (Ssave, Qsave) stored, the internal combustion engine 1 is efficiently controlled by adjusting, for example, the fuel injection amount, the injection timing, the ignition timing, the intake air amount, and the like. be able to. In addition, since the stored fuel amount (Qsave) can be accurately grasped, the storage unit 63 transmits a stored fuel data signal to a meter panel (not shown), thereby displaying an accurate stored fuel amount (Qsave). It is also possible to do this. As a result, the user who operates the internal combustion engine 1 can also accurately check the remaining amount of fuel in the fuel tank 33.

  As described above, the control device and control method for an internal combustion engine according to the present invention are useful for the control device and control method for an internal combustion engine that is operated and controlled based on the properties of the fuel stored in the fuel tank. It is suitable for accurately grasping the properties of the fuel stored in the tank.

It is a schematic block diagram showing the internal combustion engine concerning an Example. It is a figure which shows the flow of the control method of the internal combustion engine concerning an Example. It is a figure which shows the flow of the control method of the internal combustion engine concerning an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 2 Internal combustion engine main body 3 Fuel supply apparatus 31 Fuel injection valve 32 Fuel pump 33 Fuel tank 34 Fuel piping 4 Intake path 41 Air cleaner 42 Air flow meter 43 Throttle valve 44 Surge tank 45 Intake passage 5 Evaporated fuel processing apparatus 51 Canister 52 Evaporated fuel purge device 53 Steam fuel piping 6 ECU
61 I / O port 62 Processing unit 63 Storage unit 7 Refueling fuel data receiving unit 100 Refueling facility 101 Refueling fuel data transmitting unit

Claims (5)

Fuel data storage means for storing as stored fuel data, which is a property and amount of stored fuel in the fuel tank;
Refueling fuel data receiving means for receiving refueling fuel data which is the nature of the refueling fuel to be transmitted and the amount of refueling fuel transmitted from the refueling fuel data transmitting means provided in the refueling facility;
A supply amount calculating means for calculating a supply amount of fuel supplied to the internal combustion engine;
Based on the stored fuel data stored in the fuel data storage means and the fuel supply fuel data received by the fuel supply fuel data receiving means when receiving the fuel supply fuel data by the fuel supply fuel data receiving means, or Based on the stored fuel data stored in the fuel data storage unit and the supply amount calculated by the supply amount calculation unit, the stored fuel for calculating the property of the stored fuel and the stored fuel amount in the fuel tank A calculation means;
Fuel data update means for updating the stored fuel data stored in the fuel data storage means based on the calculated properties of the stored fuel in the fuel tank and the amount of stored fuel;
A control device for an internal combustion engine, comprising: Further comprising evaporative fuel calculating means for calculating the property of the evaporated fuel purged and the amount of evaporated fuel every time purge is performed by the evaporative fuel purge device that purges the evaporated fuel generated in the fuel tank to the intake path of the internal combustion engine;
The stored fuel calculation unit is configured to store the stored fuel in the fuel tank based on the property of the evaporated fuel and the amount of evaporated fuel calculated by the evaporated fuel calculation unit and the stored fuel data stored in the fuel data storage unit. The control device for an internal combustion engine according to claim 1, wherein the property and the amount of stored fuel are calculated.   The control apparatus for an internal combustion engine according to claim 1 or 2, wherein operation control of the internal combustion engine is performed based on the stored fuel data stored by the fuel data storage means. In a control method for an internal combustion engine that is operated and controlled on the basis of stored fuel data that is a property and amount of stored fuel in a fuel tank stored in a fuel data storage means,
A procedure for receiving fuel oil data, which is a property of the fuel to be fed and a quantity of fuel to be fed, transmitted from a fuel fuel data transmission means provided in the fueling facility;
A procedure for calculating the properties of the stored fuel and the amount of stored fuel in the fuel tank based on the stored fuel data stored in the fuel data storage means and the received refueling fuel data;
A procedure for updating the stored fuel data stored in the fuel data storage means based on the calculated property of the stored fuel in the fuel tank and the amount of stored fuel;
Or a procedure for calculating a supply amount of fuel supplied to the internal combustion engine;
A procedure for calculating the property of the stored fuel and the amount of stored fuel in the fuel tank based on the stored fuel data stored in the fuel data storage means and the calculated supply amount;
A procedure for updating the stored fuel data stored in the fuel data storage means based on the calculated property of the stored fuel in the fuel tank and the amount of stored fuel;
A control method for an internal combustion engine comprising: A procedure for calculating the property of the evaporated fuel and the amount of evaporated fuel every time purge is performed by the evaporated fuel purge device that purges the evaporated fuel generated in the fuel tank to the intake path of the internal combustion engine;
A procedure for calculating the stored fuel property and the stored fuel amount in the fuel tank based on the stored fuel data stored in the fuel data storage means and the calculated evaporated fuel property and evaporated fuel amount;
The method for controlling an internal combustion engine according to claim 4, further comprising:

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