BRPI0800218B1 - vehicle departure information display device - Google Patents

Abstract

vehicle departure information display device. The present invention relates to a device having a simple and economical constitution which, when reduced starting capacity is expected, allows a driver to recognize this situation before starting the engine. In a vehicle that includes an engine capable of using a mixed fuel, which is produced by mixing multiple species of fuels, a starting information display device is configured to include an air temperature detector 13, which detects the fuel temperature. an external air or air received at the engine and a starting exposure unit 35 which provides a visualization of the engine starting capacity prior to engine starting based on the outside air or intake air temperature detected by the temperature detector donate.

Description

Report of the Invention Patent for "VEHICLE DEPARTURE INFORMATION EXHIBITION DEVICE".

Technical Field The present invention relates to a vehicle starting information display device that includes an engine capable of using a mixed fuel, which is produced by blending multiple species of fuels. Background Art Recently, an exposure medium including an Internal combustion engine (engine) capable of using not only gasoline, which has been used as a conventional fuel, but also a mixed fuel, which is produced by mixing multiple fuel species, has been used, practically. Here, as such a mixed fuel, a fuel, which is produced by mixing alcohol (methanol or ethanol) or similar in gasoline, is considered. However, gasoline and alcohol differ from each other in latent vaporization heat, a flash point and the like and, therefore, when alcohol, which exhibits lower starting capacity at low temperature compared to gasoline, is supplied to a tank at Starting capacity is reduced at low temperature, where ambient temperature is low. Accordingly, an engine fuel switching device has been proposed which is configured so that two tanks, ie one dedicated to a gasoline tank and an alcohol or mixed fuel tank, are provided independently of each other at the time of starting. At a low engine temperature, gasoline is supplied to a carburetor or gasoline-exclusive tank fuel injection device to ensure favorable starting capability (for example, see patent document 1). Patent Document 1 JP-UM-A-61-1555652 Description of the Invention Problems the Invention Must Solve However, in the aforementioned prior art, a plurality of control valves (or fuel injection devices) to select the tank fuel and fuel supply becomes necessary and therefore the formation of a fuel supply system becomes complicated and at the same time a manufacturing cost is pushed upwards. As a result, in a vehicle (a relatively small four-wheeled vehicle, two-wheeled vehicle, private-use vehicle, or the like, for example) which makes mounting a plurality of fuel tanks, which makes mounting a In a plurality of difficult fuel tanks, control valves or the like, it is difficult to prevent the reduction of starting capacity in a low temperature environment at the time of mixed fuel use.

On the other hand, when reducing starting capacity, when mixed fuel is used derived from an environmental condition, that is, when the ambient temperature is lowered and it is difficult to ensure favorable starting capacity with a present indoor mixing ratio. From the tank, gasoline, showing favorable low-temperature starting capability, is replenished to increase a gasoline-to-fuel mixing ratio, thereby improving low-temperature starting capability. However, when favorable starting capability cannot be obtained due to starting, a driver cannot determine whether an unfavorable starting capacity course is derived from a disadvantage in a system, such as engine malfunction or an environmental condition. The present invention was made to overcome these disadvantages and it is an object of the present invention to provide a device having a simple and economical constitution which, when reduced starting capacity is expected, allows a driver to recognize this situation before starting a vehicle. motor.

Means to Solve the Problem To achieve an object of the present invention by overcoming the above disadvantages, according to the present invention, in a vehicle having an engine capable of using a mixed fuel, which is produced by mixing many species of fuels, a Starting information display device is configured to include an air temperature detector (an inlet air temperature sensor 13 or an external air temperature sensor 1Θ in embodiments, for example), which detects the temperature of an air or an air received at the engine and an exposure medium (an ECU 20, a starting exposure unit 35 in the modalities, for example), which exposes the engine starting capacity prior to engine starting based on temperature outside air or inlet air detected by the air temperature detector.

In the present invention, the display part (an indicator lamp 46, an information display device 55 in the embodiment, for example) in the display medium may preferably be mounted on a mobile display device (metering units 40.50 in embodiments, for example), which shows a state of travel from a vehicle to a driver.

In the present invention, the exposure means may preferably be configured to display information when the outside air or inlet air temperature detected by the air temperature detector is below a predetermined starting temperature (predetermined temperature ,ο, Ι0ι, T02, T03, T04 and a characteristic curve Dc in the embodiments, for example), which is preset based on influence, which reduces engine starting capacity when mixed fuel is used.

In addition, the starting information display device further includes an oxygen concentration detection means (an oxygen concentration detection sensor 17 in embodiments, for example), which detects the oxygen concentration contained in an electric motor generator. and a mixture ratio estimation means (an EXU 20 in modalities, for example), which estimates a mixture ratio of the multiple fuel species in the mixed fuel in response to the oxygen concentration detected by the oxygen concentration detection means and The exposure medium may be configured to change the predetermined starting temperature (predetermined temperatures T0, Τ0ι, T02, T03, T04 and characteristic curve Dc in the embodiments, for example) in response to the estimated mixing ratio of the medium. of mixing ratio estimation. Advantage of the Invention The starting information display device according to the present invention is configured to include the exposure medium that exposes the engine starting capacity prior to engine starting based on external air temperature or intake air detected by the air temperature detector. Because of this constitution, the influence that is expressed on engine starting capacity based on a change in ambient temperature is shown by the exposure medium and therefore a driver can recognize whether engine starting capacity is in good Condition or a bad condition under this environment, before starting the engine, thus providing a vehicle that has the simple constitution, can be manufactured at a low cost and can accentuate the drive capability.

In the present invention, by mounting the exposure portion of the exposure means on the mobile exposure device, which shows the mobile state of the vehicle to the driver (a speedometer, a tachometer, a composite exposure meter, a metering unit (which includes several or similar indicator lamps), the driver can gain favorable visibility and at the same time the driver never fails to focus his attention on the exposure part when the engine is started and therefore , the display part can certainly convey the starting information to the driver.

Further, by constituting the starting information display device such that the information is shown when the temperature detected by the air temperature detector becomes lower than the predetermined starting temperature, which is provided based on the reducing influence. engine starting capacity at the time of mixed fuel use, when worsening engine starting capacity is expected due to reduced ambient temperature, this information is displayed prior to engine starting to attract driver attention and Therefore, the driver can clearly recognize the reduction of starting capacity based on environmental conditions.

By constituting the starting information display so that the predetermined starting temperature is changed in response to the engine warm-up state detected by the heating state sensing means, the starting information display is correlated with the engine warm-up state. As a result, even when the inlet temperature suddenly changes or the engine is restarted in a state where the engine is warming up, it is possible to stably display the engine starting capability information displayed by the exposure medium and at the same time. Over time, the accuracy of exposure may be enhanced by approximation of exposure by the exposure medium to the good or poor condition of the actual starting capability.

Further, the starting information display device may be configured such that the starting information display device includes oxygen concentration detection means, which detects oxygen concentration in the exhaust gas, ratio estimation means. Mixing ratio, which estimates the mixed fuel mixture ratio based on the detected oxygen concentration and the exposure medium changes the starting temperature in response to the estimated mixing ratio by the mixture ratio estimation means. As previously mentioned, the engine's starting capacity at low engine temperature changes, depending on the type of fuel to be mixed and the mixing ratio, where the higher the gasoline mixing ratio, the lower the temperature becomes. where the starting capacity is reduced. Accordingly, by constituting the starting information display device such that the starting temperature is changed in response to the estimated mixing ratio by the mixing ratio estimation means, the starting information display device can transmit the starting information with high probability in response to the species and mixing ratio of the reactive mixed fuel stored inside a tank for the driver.

Due to such constitution, according to the present invention, it is possible to provide the starting information display device having the simple and economical constitution which, when reduction of starting capacity is expected, allows the driver to recognize this situation before departure. of the engine.

Best Mode for Carrying Out the Invention Figure 1 is a schematic constitutional view of a starting information display device including a vehicle internal combustion engine to which the present invention is applied. An engine 1 is configured such that engine 1 can use a mixed fuel that is produced by mixing multiple fuel species. For example, the engine is operated by burning the mixed fuel, which is produced by blending ethanol and gasoline. In an inlet pipe 2, which introduces air into the engine 1, an air filter 3, a regulating valve 4 and an injector 5 are mounted on one side upstream. An inlet air flow rate purified by the air filter 3 is adjusted by the regulating valve 4 and the inlet air is mixed as the injector fuel injected 5 and the air / fuel mixture is supplied to the engine 1. A Three-way 8 is mounted on a downstream side of an engine 1 exhaust pipe 7 to purify contents such as HC, CO or NOx in an exhaust gas. Injector 5 is connected to a control device to control engine 1 operation, ie on an ECU (Electric Control Unit) 20.0 injector 5 injects a mixed amount of fuel in proportion to an injection time inside of the intake pipe 2 in response to an injection control signal including the ECU 20 injection time. A starting exposure unit 35 is connected to the ECU 20 and shows the influence that an environmental condition expresses on the starting capacity. response in response to an exposure control signal from ECU 20. Throttle valve 4, a choke aperture sensor (hereinafter described as the TH sensor) 11, which detects the throttle opening (TH choke) 4, is connected. The regulating valve 4 consists of a potentiometer which detects an opening / closing angle position of a valve element in the regulating valve 4, for example. Between the regulating valve 4 and the engine 1, an inlet pressure sensor (hereinafter referred to as Pb sensor) 12, which senses a pressure (inlet pressure Pb) within the inlet pipe 2 and an inlet temperature sensor. inlet (hereinafter described as TA sensor) 13, which detects an air temperature (TA) taken within the intake pipe 2 are arranged. For example, an absolute pressure type pressure sensor is used as the PB 12 sensor in order to detect an absolute pressure inside the intake pipe 2.0 TH 11 sensor, the PB 12 sensor and the TA 13 sensor are connected to ECU 20 and the detection information of the respective sensors is entered into ECU 20.

On engine 1, a water temperature sensor (hereinafter referred to as TW sensor) 15, which detects a cooling water temperature (TW) for engine cooling and a handwheel angle sensor (hereinafter described as sensor (CRK) 16, which detects an angular position of the crank shaft (CRK crank angle), are mounted. In exhaust pipe 7, an oxygen concentration sensor (hereinafter described as sensor 02) 17, which detects the oxygen concentration contained in the exhaust gas, is mounted. Here, this embodiment describes a constitutional example of the starting information display device when motor 1 is a water-cooled motor. The TW 15 sensor, CRK 16 sensor, and 0217 sensor are connected to ECU 20 and the detection information of the respective sensors is input to ECU 20. Figure 2 is a block diagram showing the internal constitution of ECU 20. The ECU 20 includes a CPU 21, a RAM 22, a ROM 23, and an EEP-ROM 24 and these parts are mutually connected via an internal bus inside the ECU 20.0 TH 11 sensor, the PBA12, TA 13 sensor, TW 15 sensor, CRK 16 sensor and 02 17 sensor are connected to CPU 21 via an I / O bus and information detected by the respective sensors is input. In addition, injector 5 is connected to CPU 21 via the I / O bus, whereby through the injection control signal output to injector 5 it is possible to allow injector 5 to inject a quantity of fuel corresponding to the injection time included in the input control signal. jection. RAM 22 is used as an operating region of a control program, which is operated on CPU 21 or the like. RAM 21 is a memory device that erases the information stored within it when the electricity supply is stopped. ROM 23 is a memory device that preliminarily adjusts and stores a control program which is operated by CPU 21 and a Pb / Ne map, a Ne / TH map, a correction coefficient table, an information control devices and the like, which constitute control information for controlling the motor 1. ROM 23 is also a memory device that contains the information stored within it without deleting the information even when the electricity supply is stopped. The EEP-ROM 24 is a memory device that performs writing and erasing information by CPU 21 during CPU 21 operation and contains information stored therein without paying the information even when the electricity supply is stopped. . The starter display unit 35 is mounted on a mobile display device, which shows a mobile state of a vehicle to a driver. Figure 3 is a front view of a motorcycle metering unit 40 which is an example of a mobile display device. The metering unit 40 is comprised of a tachometer 42, which is disposed on an approximately central portion of its front face, a speedometer 43, which is disposed in front of the tachometer 42, information display devices 44,45, which are disposed on the left and right sides of speedometer 43 and various indicator lamps 46 which are arranged on the left and right sides of tachometer 42 and the like. Starter exposure unit 35 is formed as one of the indicator lamps mounted on that metering unit 40, for example, indicator lamp 46d.

Still, Figure 4 is a front view of a metering unit 50 of a motorcycle which is another constitutional example of the mobile display device. The metering unit 50 includes a tachometer 52 and a speedometer 53, which are arranged in the lateral direction, information display devices 54, 55 and various indicator lamps 56, which are positioned between these meters 52,53 and are mounted on a central portion of the unit, a central switch (main SW) 58, which is disposed on one side of the information display devices near the driver and the like. Starter exposure unit 35 is provided as one of the information display devices in metering unit 50, for example as information display device 55. Starter exposure unit 35 is constituted by the use of a type meter. indicator, a liquid crystal display device or the like. Here, in Figure 3 and Figure 4, a constitutional example mounting the starting exposure unit 35 on the motorcycle metering unit is shown. However, in a four-wheeled or similar vehicle, a similar exposure unit may be configured to be mounted on a metering unit in a driver's seat (the so-called inner panel portion).

Motor Control Principle The following is the ECU 20 motor control principle 1. Engine 1 is operated in a suitable state when the air / fuel ratio, which is a ratio of air circulating through the inlet pipe 2 and fuel being injected from injector 5, takes an appropriate value. Here, the air / fuel ratio is expressed as a value that is obtained by dividing the amount of air by the amount of fuel. To operate engine 1 optimally under various conditions, the ECU 20 calculates the proper amount of injection fuel (injection time) and performs a check to allow injector 5 to inject the calculated amount of injection fuel. As a method of calculating the amount of fuel injection by ECU 20, depending on the difference in the amount of injection fuel required, methods that differ from each other are adopted between engine start-up moment 1 and operation time. Here, the amount of fuel injection is regulated based on the fuel injection time that is injected from injector 5 and the usual operating time indicates a state in which engine 1 performs a self-shift operation without rely on a starter or similar. The amount of fuel injection required to start engine 1, i.e. injector 5 start injection time (TICR) shows a tendency that, as the general characteristics of engine 1 starting capacity, shown In Figure 5, they indicate, the higher the ambient temperature at engine start-up 1, the shorter the preferred TICR start-up time (the amount of injection is decreased) and the lower the ambient temperature, the longer. preferable starting injection TICR is taken (the amount of injection is increased). Also, in Figure 5, the general characteristic of the engine starting capacity when the fuel is ethanol is indicated by a solid line and the general characteristic of the engine starting capacity when the fuel is gasoline is indicated by a dashed line. . As shown in the drawing, according to one experiment, the trend mentioned above appears most sharply when the fuel is ethanol and when the ambient temperature becomes lower than a predetermined temperature T0 (e.g., approximately 10 ° C), the injection time Preferred starting point TCR is rapidly extended.

This implies that when the ambient temperature at engine start-up is high, regardless of the mixing ratio of the fuel stored in the fuel tank, favorable starting capability can be ensured within an approximately fixed injection time, although when ambient temperature becomes lower than predetermined temperature To, depending on the fuel mixing ratio (in a state where the ethanol mixing ratio is high), the injection time corresponding to the ambient temperature becomes necessary to ensure favorable starting capacity and, when the TICR starting injection time is short, there is a possibility that the starting capacity is worse.

First mode start information display device In view of the above result, in the first mode start information display device, the ambient temperature T0, which requires adjustment of the TICR start injection time, corresponding to the ambient temperature, depending on of the fuel mixture ratio is stored primarily in ROM 23. When a main switch is turned on, the temperature T0, which the CPU 21 reads from ROM 23, and an intake air temperature detection value TA (or the value air temperature sensor TA 'introduced from the external air temperature sensor 18) introduced from the TA 13 sensor are compared one to the other and the influence that is expressed on the motor starting capacity 1 is exposed on the starting exhibition 35.

To be more specific, in the starting information display device, which is configured to use the indicator lamp 46d as the starting exposure unit 35, when it is determined that the intake air temperature TA (or the outside air temperature TA1, this definition being applied here after the same way) is equal to or below T0, so that there is a possibility of worsening starting capacity, indicator lamp 46d is switched on, while when it is determined that the intake air temperature TA exceeds the predetermined temperature To, so that worsening of starting capacity is not expected, indicator lamp 46d is turned off. Alternatively, an LED or the like, which can emit light in multiple colors, is used as the indicator lamp 46d and, when it is determined that the intake air temperature TA is at or below the predetermined temperature To, so that there is a possibility In order to worsen the starting capacity, the indicator lamp 46d is turned red, while when it is determined that the intake air temperature TA exceeds the predetermined temperature T0 so that the worsening of the starting capacity is not expected, the indicator lamp 46d is turned on in green.

According to the starting information display device having such a constitution, when the temperature at power on of the main switch exceeds the predetermined temperature T0, the indicator lamp 46d assumes an off state (the indicator lamp 46d being turned green in constitutional example using the LED or similar cover (emitting light in multiple colors) and therefore the driver is informed that worsening starting capacity based on ambient temperature is not expected, while when the temperature becomes equal to or below the predetermined temperature T0k the indicator lamp 46d is switched on (the indicator lamp 46d being turned red in the constitutional example mentioned above) and therefore the driver is informed that when the mixture ratio of ethanol to fuel is high, there is a possibility that it is difficult to start engine 1. As a result, the driver may Make sure that the engine starting capability according to the present environment is in good or bad condition before starting the engine.

Here, also as shown in Figure 5, the starting information display device can be configured such that, in addition to the temperature that requires setting the TICR starting injection time corresponding to ambient temperature, when the ethanol blend ratio is high due to the fuel mixture ratio, ie the temperature T0, which has a possibility to influence the engine starting capacity (or instead of T0), a temperature that requires adjustment of the TICR starting injection time corresponding to ambient temperature when the ethanol blending ratio is adjusted to a predetermined value or more (for example when the ethanol blending ratio is 50% or more) m, ie a Ti temperature which has a high possibility of worsening engine starting capacity, when mixed fuel is used as the fuel, is preliminarily stored in ROM 23 and the temperature Ti is shown in the exposure unit d and departure 35 in the same manner as the departure information mentioned above.

For example, when the intake air temperature TA is determined to exceed the predetermined temperature T0, the indicator lamp 46d is switched off, when the intake air temperature TA satisfies a ratio Ti <TA <To, the indicator lamp 46d flashes and When the intake air temperature TA is determined to be Ti or below, indicator lamp 46d is switched on. Also, in the constitutional example, which uses the LED capable of emitting light in multiple colors as the indicator lamp 46d, when it is determined that the intake air temperature TA exceeds the predetermined temperature T0, the indicator lamp 46d is lit in green when TA intake air temperature meets a ratio Ti <TA <T0 indicator lamp 46d is lit yellow and when it is determined that TA intake air temperature is Tf or below, indicator light 46d is lit red.

Because of this constitution, turning off the indicator lamp 46d (turning on the indicator lamp 46d in green in the constitutional example, using the LED or similar capable of emitting multiple colors), when the temperature at the time of switching on the main switch exceeds At T0, a driver is informed of the fact that a worsening of starting capacity based on ambient temperature is not expected. Also, by flashing the indicator lamp 46d (the indicator lamp 46d turns yellow in the constitutional example mentioned above), when the temperature meets the ratio Ti <TA <To. the driver is informed of the fact that the ethanol to fuel mixture ratio is high and therefore there is a possibility that it is difficult to start engine 1. Also, by turning on the indicator lamp 46d (illuminating at red indicator light 46d in the constitutional example mentioned above), when the temperature is Ti or below, the driver is informed of the fact that worsening of starting capacity is expected with mixed fuel. As a result, the driver can still finely recognize whether the engine's starting capability in the specific environment is in good or bad condition prior to engine starting.

Still, in a constitutional example, which uses the information display device 55 as the starting display unit 35, the CPU 21 displays information comparing the read temperature T0 of ROM 23 and the intake air temperature TA no in the device. For example, when an indicator type meter shown in Figure 6 is used as the information display device 55, a right side of a reference index 55b within an indicator range of an indicator 55a is defined as a region H where favorable starting capacity is expected and a left side of the benchmark 55b within the indicator range of indicator 55a is defined as a region C where poor starting capacity is expected and CPU 21 shows a good or bad expected starting capacity based on the TA intake air temperature, which is detected by the TA sensor 13 according to a position indicating the indicator 55a.

To be more specific, when the TA intake air temperature detected by the TA sensor 13 is equal to the predetermined temperature T0 mentioned above, the indicator 55a points to the reference index 55b, when the TA intake air temperature exceeds the predetermined temperature. T0, indicator 55a points to region H on the right side of benchmark 55b, and when the intake air temperature TA is below the predetermined temperature T0, indicator 55a points to region C on the left side of benchmark 55b. An oscillation (gain) or indicator 55a with respect to reference index 55b may be determined accordingly. For example, the oscillation of indicator 55a is adjusted to establish a relationship in which the oscillation linearly corresponds to a temperature change in the left and right directions, using the temperature To as the reference. Alternatively, in accordance with the relationship established between ambient temperature and TICR starting injection time shown in figure 5, it is possible to establish a relationship where the amplitude of oscillation in the right direction of the reference index 55b, when the air temperature TA exceeds the temperature To, is compressed exponentially with respect to a temperature change and the amplitude of oscillation in the left direction of the reference index 55b when the intake air temperature TA becomes below the temperature To is increased. quadratically with respect to a temperature change. Here, a bar meter using an LED or a liquid crystal display device may also be used as the information display device 55. For example, the bar meter using the LED may adopt an LED that emits lights on different colors on the left and right sides of the index using temperature T0 as the reference or can be set to continuously change color using temperature T0 as the reference.

According to the starting information display device, which uses this information display device 55, the temperature at the time of switching on the main switch is equal to the temperature T0, which becomes the benchmark for determining the starting capacity. indicator 55a points to benchmark 55b. When the temperature exceeds temperature T0, indicator 55a points to region H on the right side of reference index 55b and when temperature is below temperature T0, indicator 55a is positioned on region C on the left side of reference index 55b. Also, in both region H where favorable starting capacity is expected and in region C where worsening starting capacity is expected either the good side or the bad side is indicated. As a result, the driver can recognize the good or bad side of the engine's starting capability under the specific environment and the degree of good or bad side instinctively and in detail before the engine is started just by glancing at the device. information exposure 55.

Due to this constitution, according to the first mode starting information display device, which has been explained so far, the expressed influence on engine starting capacity 1 based on ambient temperature change is displayed in the 35, and therefore the driver can recognize the good or bad side of the engine's starting capability in the specific environment prior to engine starting, so it is possible to provide a vehicle having the starting information display device, Its simple and economical construction consists of the temperature detector 13, which detects the temperature of the inlet air or outside air, the ECU 20 and the starting exposure unit 35 and having the easy-to-operate property. Here, in the embodiment, the explanation is made with respect to the constitutional example in which the ECU 20, which controls engine operation, controls the exposure of the starting exposure unit 35. However, exposure control can be performed by a control other than ECU 20.

Second Mode Starting Information Display Device In the above mentioned mode, such as the general characteristic in engine starting capacity, engine starting capacity based on the relationship between ambient temperature and TICR starting injection time has been explained. . However, the TICR start injection time differs between starting in a state where the engine temperature is substantially the same as ambient temperature (cold starting) and re-starting in a warm-up state, where motor 1 is warmed ( hot start). This difference is considered to be attributable to a fact that when the engine is in a warm-up state, the intake air and fuel are heated in intake and compression strokes and the fuel adhered to an inner wall of a cylinder and A piston is vaporized to facilitate ignition. As a result, in hot start, which is performed in a state in which engine 1 is warmed up, the engine's starting capacity hardly worsens during an approximately fixed injection time until the ambient temperature becomes lower than the ambient temperature. ambient temperature of cold start. That is, on hot start, the temperature T0 which has a possibility of influencing the motor starting capacity is changed to a temperature lower than the corresponding cold start temperature mentioned above.

Here, as an index for determining a heating state of motor 1, for example, when motor 1 is a water-cooled motor, a sensor detection value (TW water temperature) of TW 15 to detect a water temperature A cooling temperature is exemplified as a typical example, while when motor 1 is a chilled air motor, a sensing value (motor temperature) of an engine temperature sensing sensor to detect a cylinder block temperature is exemplified. as a typical example. However, a temperature from another part of the engine 1, for example a sensing value (lubricating oil temperature) of an oil temperature sensing sensor, which detects a lubricating oil temperature that senses a temperature of a lubricating oil inside engine 1 can also be used as the index for determining a heating state of engine 1. To obtain a relationship between the cooling water temperature of the water-cooled engine and the time Starting Injection In a heating state corresponding to the water temperature, the water temperature matching ratio TWo TICR starting injection time can be obtained as shown in Figure 7A based on a result of an experiment. and the like.

As can be clearly understood from Figure 7A, when the motor 1 is heated and the water temperature TW exceeds the predetermined water temperature T3) favorable starting capacity can be ensured for an approximately fixed short injection time in the same manner. that the case shown in figure 5 wherein the inlet air temperature exceeds the temperature To. However, when the water temperature TW becomes below the predetermined temperature T3, an engine warming effect is not obtained and therefore when the TICR starting injection time is short, there is a possibility that the starting capacity will worsen. in a state where the mixing ratio of ethanol in the mixed fuel is high. Figure 7B shows the relationship between cooling water temperature TW and intake air temperature TA from a standpoint whether favorable starting capacity can be assured or not with the fixed starting injection time TICR. A portion of the graph above a characteristic curve Dc defines a region in which favorable starting capability is expected with approximately fixed injection time, and a portion of the graph below the characteristic curve Dc defines a region in which it is difficult to ensure starting capability. favorable with fixed injection time and therefore worsening of starting capacity is expected. As shown in the drawing, in a state where the TW water temperature exceeds the predetermined temperature T3, due to the engine heating effect, even when the intake air temperature TA becomes lower than the temperature T0 within a range. fixed, favorable starting capacity can be obtained by matching the water temperature (engine warm-up state). On the other hand, in a state where the water temperature TW becomes lower than the predetermined temperature T3, the engine warming effect cannot be obtained, as previously mentioned, the good or bad side of the starting capacity is determined. based on whether the intake air temperature TA exceeds the temperature T0 or not.

As a result, in the start-up information display device of the second embodiment, a starting capacity determination table based on the TW water temperature and the intake air temperature TA shown in Figure 7B is preliminarily adjusted and stored in the ROM 23. When the master switch is turned on, CPU 21 reads the ROM 23 starting capacity determination table and at the same time a TW water temperature detection value entered from the TW 15 sensor and a TA intake air temperature detection input from TA sensor 13 are filled in the table to determine either the good or the bad side of the starting capacity and a determination result is displayed on the starting exposure unit 35.

To be more specific, CPU 21 fills the TA intake air temperature detected by the TA sensor 13 and the TW water temperature detected by the TW sensor in the table, determines either the good or the bad starting capacity based on whether the combination of the present intake air temperature TA and water temperature TW is positioned above or below the characteristic curve Dc and shows the determination result in the starting exposure unit 35.

For example, in the starting information display device having the constitution using indicator lamp 46d as the starting display unit 35, when the combination of inlet air temperature TA present and water temperature TW present is expressed as Pi, shown in Fig. 7B, P1 is positioned above the characteristic curve Dc and, therefore, it is determined that the starting capacity is favorable and the indicator lamp 46d is not on. That is, in this combination, although the intake air temperature TA is below the temperature T0t, the favorable starting capacity is expected due to the engine warm-up effect and therefore a shutdown state of the indicator lamp 46d is maintained. . Also, when the combination of the intake air temperature TA present and the water temperature TW is expressed as P2, shown in the drawing (or the combination being positioned on the characteristic curve), P2 is positioned below the characteristic curve Dc and therefore It is determined that the starting capacity is not favorable and the indicator lamp 46d is switched on. In this combination, although the water temperature TW exceeds the temperature T3, the intake air temperature TA becomes greatly below the temperature T0 and therefore it is expected that the acquisition of favorable starting capacity is difficult only with the heating effect. and the indicator lamp 46d is switched on. On the other hand, when the water temperature TW is at or below temperature T3, the engine warming effect cannot be obtained and therefore the good or bad side of the starting capacity is determined based on whether Inlet air temperature TA exceeds the temperature To or not and an exposure control substantially equal to the exposure control mentioned above of the first mode starting information display device is performed. Here, the starting information display device using an LED capable of emitting light in multiple colors and changing the emission color corresponding to the good or bad side of the starting capability can also be configured in the same way.

According to the starting information display device having such a constitution, when the combination of the intake air temperature TA and the water temperature TW at the time of switching on the main co-mutator is positioned above the characteristic curve Dc which becomes In order to determine the good or bad side of the established starting capacity, taking into consideration the engine warm-up state, the indicator lamp 46d is turned off so that the driver is informed of the fact that the capacity deterioration departure based on the environmental condition is not expected. On the other hand, when the combination of the intake air temperature TA and the water temperature TW at the time of switching on the main switch is positioned on the characteristic curve Dc or below the characteristic curve Dc, the indicator lamp 46d is switched on and the driver is switched on. informed of the fact that there is a possibility that it is difficult to start engine 1 when the ethanol to fuel mixture ratio is high. As a result, the driver can recognize the good or bad side of the engine starting capability under the environmental condition, including the engine warm-up state, before the engine starts.

Further, when the information display device 55 is used as the starter exposure unit 35, that is, for example, when an indicator type meter shown in figure 6 is used as the starter exposure unit 35, the index 55b within an indicator range 55a is made to correspond to the characteristic curve Dc in figure 7B, a region H on the right side of the reference index 55b, where favorable starting capability is expected, is made to match to a region above characteristic curve Dc in figure 7B, and a region C on the left side of reference index 55b, where worsening of starting capacity is expected, is made to correspond to a region below characteristic curve Dc in figure 7B. It is determined whether the combination of the present intake air temperature TA and the present water temperature TW is positioned above the characteristic curve Dc or below the characteristic curve Dc and a determination result is shown in the starting exposure unit 35.

That is, when the combination of the TA intake air temperature detected by the TA sensor 13 and the TW water temperature detected by the TW sensor is positioned on the characteristic curve Dc in figure 7B, the indicator 55a points to the reference index 55b. When the combination of intake air temperature TA and water temperature TW is positioned above the characteristic curve Dc (for example, the combination is positioned at Pi in the drawing), indicator 55a points to region H on the right side of the index. reference 55b. In addition, the combination of intake air temperature TA and water temperature TW is positioned below the characteristic curve Dc (for example, the combination is positioned at P2 in the drawing), indicator 55a points to region C on the left side. of benchmark 55b.

As with the above mentioned embodiment, the oscillation (gain) of the indicator 55a with respect to the reference index 55b can be adjusted accordingly. For example, using characteristic curve Dc as the reference, the oscillation of indicator 55a is adjusted so that a linear correspondence relationship in both right and left directions is established with respect to a distance from characteristic curve Dc to the combination. present inlet air temperature TA and water temperature TW (e.g. Pi or P2 mentioned above). Alternatively, an amount of upward or downward displacement, whereby the intake air temperature TA overlaps the characteristic curve Dc according to the present water temperature TW (heating state) is established as a linear correspondence relation to at intake air temperature TA. Also, the amplitude of oscillation of indicator 55a in the right direction of reference index 55b, when the combination of the present intake air temperature TA and the present water temperature TW is positioned above the characteristic curve Dc (for example, when the P1) can be exponentially compressed with respect to a temperature change of the intake air temperature TA, while the amplitude of oscillation of the indicator 55a in the left direction of the reference index 55b, when the combination of the present temperature of the Inlet air TA and water temperature TW is positioned below the characteristic curve Dc (for example, when the combination is positioned at P2) can be adjusted as a correspondence ratio that is quadratically increased with respect to a temperature change. inlet air temperature TA. Here, the above-mentioned constitution also applies to a case where a bar meter using an LED or liquid crystal display device is used as the information display device 55 when the combination of the air temperature of TA intake and water temperature TW at the time of switching on the main switch is equal to the characteristic curve Dc, which becomes the reference for determining the good or bad side of the established starting capacity taking into account the heating state. of engine, indicator 55a points to benchmark 55b. When the combination of intake air temperature TA and water temperature TW is positioned above characteristic curve Dc, indicator 55a points to region H on the right side of reference index 55b. Also, when the combination of intake air temperature TA and water temperature TW is positioned below the characteristic curve Dc, indicator 55a points to region C on the left side of reference index 55b. Also, in both Region H where favorable starting capacity is expected and in Region C where worsening starting capacity is expected, the good side and the bad side are indicated. As a result, the driver can recognize the good and bad sides of the engine's starting capability under the environmental condition, including the engine warm-up state and the degree of good or bad side instinctively and in detail before starting. by just glancing at the information display 55.

According to the starting information display device of the second embodiment explained above, the influence of the environmental condition, including the engine warm-up state, which is expressed in the starting capacity, is shown in the starting exposure unit 35. Due Under this constitution, the determination of the good or bad side of the starting capacity is correlated with the engine warm-up state and therefore, even when the intake air temperature changes, the starting capacity information can be displayed. at the starter exposure unit 35 stably, and at the same time, the starter information can be shown with starter capacity close to the actual starter capacity when the engine is restarted in a warm-up state.

Third Mode Starter Information Display Device The following is an explanation of a starter information display device, which estimates an ethanol mixture ratio based on the oxygen concentration contained in the exhaust gas. a motor and displays information on the influence that is expressed on starting capacity based on an environmental condition in response to the estimated mixing ratio.

First of all, the explanation is made regarding the calculation of a fuel injection time during a usual operation and an estimation method of the ethanol blending ratio. At the time of performing the usual operation, by reference to the Pb / Ne map or the Ne / TH map, which is preliminarily obtained from experimental or similar results, the CPU 21 obtains the amount of intake air under various conditions and calculates the basic fuel injection time (TIM) based on the amount of intake air obtained and the target air / fuel ratio provided. Figure 8A is a view showing an example of the Pb / Ne map and Figure 8B is a view showing an example of the Ne / TH map. The Pb / Ne map is a map that is used for an oxygen intake amount estimation system, which is referred to as a velocity concentration system adopted at the time of performing a low load operation such as a heating. of the engine. Using this map, the amount of intake air is obtained based on an intake pressure Pb and engine rotational speed (Ne). As shown in Figure 8A, no fixed correlation is established between the inlet pressure Pb and the rotational speed of engine Ne, and therefore the amount of inlet air is identified using the map as an isotropic air quantity diagram.

On the other hand, the Ne / TH map is a map that is used for an intake oxygen quantity estimation system, which is referred to as the choke speed system adopted at the time of performing a high engine load operation. Using this map, the amount of intake air is obtained based on the rotational speed of engine Ne and the throttle opening TH. As shown in Figure 8B, also on the Ne / TH map, like the Pb / Ne map, no fixed correlation is established between Ne and TH and therefore »the amount of intake air is identified using the map as a isotropic amount of air diagram.

When a basic TIM fuel injection time is calculated based on the amount of intake air, which is obtained from the Pb / Ne map or the Ne / TH map, as a next step, it is necessary to correct the basic fuel injection time. TIM fuel based on the difference in ambient conditions between an experimental state and an actual engine operating state 1. Figure 9 is a graph showing an example of a correction coefficient table to obtain an air temperature correction coefficient of (KTA), corresponding to an intake air temperature TA, which is obtained by the TA 13 sensor for measuring the intake air temperature TA. Like other correction coefficients, correction coefficients based on the detection values that are obtained by the TH 11 sensor, the TW 15 sensor, the CRK 16 sensor, and the 02 17 sensor are present. To be more specific, correction coefficients such as a post-departure increased quantity correction coefficient (KAST), a water temperature correction coefficient (KTW), an acceleration correction coefficient (TACC), a asynchro correction (OPINJ) and an ignition timing coefficient are named. The correction coefficient table is provided for each correction coefficient and a Fuel Injection (Tout) time which allows fuel injection by injector 5 is calculated based on the above mentioned basic TIM fuel injection time and this plurality of correction coefficients. Fuel alcohol, such as ethanol, contains an oxygen O atom in its composition and therefore an amount of oxygen required for combustion per unit volume becomes small compared to a case where gasoline is burned. As a result, when mixed fuel, which is produced by the mixture of ethanol and gasoline, is used, a theoretical air / fuel ratio becomes small compared to a case where a single fuel made of gasoline is only used. As a result, to operate engine 1 in one is optimal, it is necessary to adjust the Pb / Ne map, the Ne / TH map and various correction coefficient tables for their respective ethanol and gasoline mixing ratios.

Here, it has been known from experimental or similar results that, in a state where the ethanol concentration shows a certain value, even when the map and table for optimal engine operation 1 are applied to ethanol of another concentration, If it is within a fixed range, it is possible to perform a control at substantially the same level as a control that is performed in case an appropriate map and table are applied for the other concentration. Consequently, in the engine control system, a concentration range shown in figure 10 is established and as reference ethanol concentrations in the respective ranges, four species of concentrations consisting of 22% ethanol (E22), 50% ethanol ( E50), 80% ethanol (E80) and 100% ethanol (E10Q) are obtained preliminarily and Pb / Ne maps, Ne / TH maps and various correction coefficient tables are formed for the respective ethanol concentrations. . Here, it is sufficient to provide three or more reference concentrations and the reference concentrations may be appropriately allocated with reference to any concentrations from 0% to 100%. The respective maps and tables are set so that the maps and tables have bands where the map and table overlap each other as concentrations shown in figure 10.

In ROM 23, the Pb / Ne maps and Ne / TH maps, various correction coefficient tables and the like, which are prepared for the respective ethanol reference concentrations are preliminarily adjusted and stored as a map set. (hereinafter described as the reference fuel injection maps). Here, in the explanation hereinafter, the reference fuel injection maps for the respective reference concentrations are described, respectively, as an E22% map, an E50% map, an E80% map, and an E100% map. The following is the explanation of the ethanol concentration estimation method based on the E22% map, E50% map, E80% map, and E100% map change method in the CPU control program 21. As shown in Fig. 11, which is a conceptual view of map change processing, CPU 21 performs map change processing by reference to a required injection amount increase (K02), where the control program calculates a detection signal (V02), indicative of the exhaust gas oxygen concentration, where the 02 17 sensor detects or a learned mean value (K02REF) of the required injection amount increase K02.0 injection amount increase required K02 shows a large value when the exhaust gas oxygen concentration is high and shows a small value when the exhaust gas oxygen concentration is low.

Here, when the required injection amount increase K02 or K02REF, that the average learned value of the required injection amount increase K02 shows a large value (when the exhaust gas oxygen concentration is high), this implies the state in The injection quantity of injector 5 is small (fine state) and the engine is operated with the small amount of fuel injection. Due to this operation, it is determined that the ethanol concentration in the mixed fuel is higher than the ethanol concentration of the reference injection fuel map set forth herein and therefore the processing for the change from map to map which shows The high concentration of ethanol, is realized. For example, in the E50% map as the present reference injection fuel map, when the K02REF value is large, it is determined that the ethanol concentration in the mixed fuel is greater than 50% ethanol and the injection map reference fuel is changed to the E80% map, corresponding to 80% ethanol.

On the other hand, when K02 or K02REF shows a small value (when the exhaust gas oxygen concentration is low), this implies a state where the injection amount of injector 5 is large (rich state) and the engine is operated. with the excessive amount of fuel injection. Due to this operation, it is determined that the ethanol concentration in the mixed fuel is lower than the ethanol concentration of the reference injection fuel map established herein and therefore the processing to change the maps to the map that shows the low concentration of ethanol is performed. For example, when using the E50% map as the present reference injection fuel map, when K02REF value is small, it is determined that the ethanol concentration in the mixed fuel is less than 50% and the injection fuel map The reference value is changed to the E22% map, corresponding to 22% ethanol.

Thus, the ethanol concentration can be estimated based on the exhaust gas oxygen concentration detected by the 02 17 sensor and the map corresponding to the estimated ethanol reference concentration is selected and stored in the EEP-ROM 24.

As can be understood from Figure 5, which is the view showing the relationship between ambient temperature and starting injection time, the predetermined temperature To, shown in the drawing is changed, corresponding to the concentration of ethanol in the mixed fuel, where The lower the ethanol blending ratio (the higher the gasoline blending ratio), the lower the predetermined temperature T0 becomes. To explain this relationship corresponding to the reference ethanol concentration, assuming that the predetermined temperature when the ethanol concentration is 100%, such as Toi, the predetermined temperature, when the ethanol concentration is 80% as Tq2, the predetermined temperature when the concentration of ethanol is 80% as T02, the predetermined temperature, when the ethanol concentration is 50% as T03 and the predetermined temperature, when the ethanol concentration is 22% as T04, a Toi <T02 <T03 <T04 ratio is established ( see chain lines in figure 5). When the ambient temperature at engine startup becomes lower than the predetermined corresponding temperatures mentioned above corresponding to the respective ethanol concentrations, the worsening of the starting capacity is expected during a substantially fixed injection time.

Accordingly, in the starting information display device of this embodiment, the predetermined temperatures Τοι, Το2, Τοβ, T04, which require adjustment of the TICR starting injection time corresponding to ambient temperatures, are preliminarily stored in ROM 23, corresponding to the four species of reference ethanol concentrations. When the main switch is turned on, CPU 21 reads the ethanol concentration from EEP-ROM 24 and at the same time the predetermined temperature mentioned above corresponding to the ethanol concentration is read from ROM 23. Then CPU 21 compares the read-out temperature read from ROM 23 with a TA intake air temperature detection value entered from the TA sensor 13 and shows the expressed influence on starting capability based on a comparison result in the starting exposure unit 35.

For example, in a state where the fuel mix ratio recorded in EEP-ROM 24 is 50% ethanol by the ethanol concentration estimate adjustment, CPU 21, when the main switch is turned on, reads that the ethanol concentration in fuel is 50% of EEP-ROM 24 and reads predetermined temperature T03, corresponding to ethanol 50% of ROM 23. Then CPU 21 compares predetermined read temperature T03 with an input air temperature detection value TA entered When the CPU 21 determines that the intake air temperature TA is at or below the predetermined temperature T03, so that the worst starting capacity is expected, the CPU 21 turns on the indicator lamp 46d, while, when it is determined that the intake air temperature TA exceeds the predetermined temperature T03 and the worsening of starting capacity is not expected, the CPU 21 turns off the indicator lamp 46d. The starter information display device, which uses an LED capable of emitting light in a plurality of colors and capable of changing light-emitting colors, may also be configured in the manner mentioned above.

Also, in a constitutional example, using information display device 55 as the starting display unit 35, when the intake air temperature TA equals the predetermined temperature T03, indicator 55a points to the exposure region Also, when the intake air temperature TA is below the predetermined temperature T0.0 indicator 55a points to the exposure region on the left side. Still, an oscillation of indicator 55a with respect to reference index 55b may be properly adjusted as previously described. Still, this constitutional example is also applicable to a starting information display device adopting a bar meter, which uses an LED or a liquid crystal display device in the same manner.

When the ethanol mixing ratio is changed due to fuel supply, for example when the ethanol concentration is reduced to approximately 20% due to gasoline supply, 0 reference fuel injection maps at the time of performing the usual operation is changed from the E50% map to the E22% map, due to the map change processing mentioned above and the E22% map is recorded in EEP-ROM 24. Therefore, at the moment of engine starting the next moment, the temperature T04, corresponding to 22% ethanol, is read from ROM 23, the predetermined temperature T04 is compared to an input air temperature detection value TA entered from the TA sensor 13 and a comparison result is shown in the exposure unit. of departure 35.

According to this starting information display device, the determination of the good side or the bad side of the starting capacity, corresponding to the fuel mixture ratio, can be performed and the result of the determination can be shown and therefore the information The most appropriate engine starting capability can be transmitted to a driver prior to engine starting. Furthermore, the starting information display device is also applicable to a vehicle having difficulty in mounting a plurality of fuel tanks, a plurality of control valves and the like. Still, it is unnecessary to mount an ethanol concentration sensor on the fuel tank and therefore a vehicle can be manufactured at a low cost.

So far, the explanation has been made with respect to the starting information display device, having the constitution that estimates the ethanol concentration in the fuel based on the sensor detection value of 02 17 and establishes the predetermined temperature corresponding to the ethanol concentration. as the reference for determining starting capacity. However, the starting information display device may be configured such that the starting information display device includes an ethanol concentration adjusting means (for example, an ethanol concentration selection switch that selects and adjusts each one of the ethanol concentration of E22%, E50%, E80% and E100%) with which a driver adjusts the ethanol concentration and when the main switch is turned on, CPU 21 references the adjustment in the ethanol concentration adjustment medium, reads the predetermined temperature (ι0ι, T02, T03, T04) corresponding to the ROM driver-adjusted ethanol concentration 23 and allows the starting exposure unit 35 to perform an exposure based on a comparison between the read predetermined temperature and a value TA inlet air temperature detection system introduced from the TA sensor 13. Due to this constitution, the starting information display device may be finish the starting capacity corresponding to the ethanol concentration with the simple constitution and at the same time the driver can recognize the degree of influence caused by the ethanol concentration in the mixed fuel by changing the ethanol setting. Fourth mode departure information display device So far, the explanation has been made with respect to the starting information display device, with the constitution showing the information, whether or not the expected deterioration of the starting capacity is based on in environmental condition, when 0 TICR start injection time is set to approximately fixed value. The following is an explanation of a case where the present invention is applied to a vehicle having an engine control system, which controls an operation of engine 1 with an injection amount suitable for an environmental condition by changing the engine. TICR starting injection time, corresponding to a change in the environmental condition.

In this engine control system, when performing the usual operation, CPU 21 calculates a basic TIM fuel injection time by referring to a Pb / Ne map or a Ne / ΓΗ map corresponding to an ethanol concentration. which is estimated based on the exhaust gas oxygen concentration and is stored in EEP-ROM 24 and calculates a Tout fuel injection time to actually allow injector 5 to inject fuel based on a table of correction coefficients stored in ROM 23, such as an intake air temperature correction coefficient KTA, a post-departure increased quantity correction coefficient KAST, a water temperature correction coefficient KTW, a TACC acceleration correction coefficient, a OPINJ asynchronous correction coefficient or ignition timing coefficient.

Also, also with respect to the starting injection time, as shown in figure 12A, even when the TW water temperature is set to a fixed value, the favorable injection time differs for each ethanol concentration. As a result, to maintain favorable starting capability, it is desirable to adjust the injection time so that excessive fuel injection is prevented when the ethanol concentration is at a lower limit and the maximum injection can be performed when the fuel concentration is ethanol is at an upper limit. As a result, also in adjusting the TICR starting injection time, a concentration range is adjusted as shown in Figure 12B and by setting 22% (E22) ethanol, 50% (E50) ethanol, 80% (E80 ) of ethanol, 100% (E100) of ethanol as reference concentrations, a starter injection table, indicative of a correlation relationship between the TW water temperature shown in figure 7A and the TICR starter injection time is stored in the ROM 23 as four starter injection tables, corresponding to their reference concentrations. Also, in the starting injection tables, the match is made between an Ati increment width of the starting injection time, the repetition number N, indicative of times it has become the reference for increasing the injection time, in response to the number of injections, and an upper limit value Tmax of the starting injection time as given constants. The values of these constants are also preliminarily stored in ROM 23. Hereinafter, the information that includes the starter injection tables and their constants is described as starter injection information.

In ROM 23, as shown in Figure 13, the Pb / Ne maps, Ne / TH maps, various correction coefficient tables and starting injection information, which are prepared for respective ethanol reference concentrations are, respectively, pre-stored as a map set (the reference fuel injection maps). Further, these reference fuel injection maps are referred to as a map set or a predetermined set. By storing map sets, engine 1 can be controlled over the full range of ethanol concentrations using four reference fuel injection map sets. Also, by representing the ethanol content that is continuously interchangeable from 0% to 100%, such as the values of four species of reference ethanol concentrations, using four sets of reference fuel injection maps, the correction of the reference concentration appropriate, based on the reference fuel injection maps, can be decreased thereby stabilizing the operating state.

When changing the E22% map, the E50% map, the E80% map and the E100% map, during the usual operation, as explained in conjunction with figure 11, the map change operation is performed by reference to the magnification. injection quantity K02, which the CPU 21 control program calculates based on the detection signal V02, indicative of the oxygen concentration in the exhaust gas detected by the 02 17 sensor or the learned mean value K02REF of the increase in the amount of injection required K02. Figure 14 is a flowchart showing the processing for changing the reference fuel injection quantity maps in the CPU control program 21 at the time of performing the usual operation. The reference fuel injection quantity map change process in this flowchart is called and executed repeatedly in the control processing steps at the time of performing the usual operation. First of all, in step Sal, a motor rotational speed Ne is calculated based on a detection value obtained by the CRK16 sensor, it is determined whether the calculated motor rotational speed Ne and the throttle opening TH obtained by the TH 11 sensors are present within a calculation region of K02REF, shown in Figure 15 or not. When it is determined that the rotational speed of engine Ne and throttle opening TH are present outside the calculation region of K02REF, the reference fuel injection map change is not performed and processing is finished. On the other hand, when it is determined that the motor rotational speed Ne and the throttle opening TH are present within the K02REF calculation region, processing proceeds to step Sa2, where it is determined whether motor 1 is in a state or not, based on the TW cooling water temperature and the TA intake air temperature, which are detected by the TW 15 sensor and the TA 13 sensor. So when it is determined that engine 1 is not running In a warm-up state, the reference fuel injection map change is not performed and processing is terminated, while when it is determined that engine 1 is in a warm-up state, processing proceeds to step Sa3, where K02REF is updated, ie the measured learning is performed based on the K02 value obtained based on the oxygen concentration recently detected by the 0217 sensor, thereby calculating K02REF and the calculated value is updated as new K02REF. Next, in step Sa4, it is determined whether or not updated K02REF falls within a range of a limit value on the concentration of ethanol present. Here, the limit value in the reference oxygen concentration consists of an upper limit value and a lower limit value that are adjusted for each reference concentration shown in figure 16 and the limit values are adjusted with an adjustment such that maps overlap each other. For example, as shown in figure 16, in the case of the E22% map, the lower limit value is 0 and the upper limit value is 1.1. Similarly, for the E50% map, the lower limit value is 0.85 and the upper limit value is 1.08, and for the E80% map, the lower limit value is 0.85 and the upper limit value. is 1.1. In the case of the El 00% map, only the lower limit value is adjusted and the value is 0.8. For example, in a state where the present reference concentration is E50%, when a calculated K02REF value falls within a range of 0.85 to 1.08, it is determined that the calculated K02REF falls within the limit range and Map change is not performed. On the other hand, when calculated K02REF assumes a value of less than 0.85, the change to the E22% map is performed, while when the K02REF assumes a value that exceeds 1.08, the change to the E60% map is performed (step Sa5).

Even after the map change operation is performed, for example, even after the map is changed from the E50% map to the E80% map, the map change processing shown in figure 14 is repeatedly called and executed. In this case, however, corresponding to the change from the reference fuel injection map to the E80% map, the injection time is changed (increased) and therefore the oxygen concentration measured by the 0217 sensor is changed (lowered) by the that the value of the required injection amount increase K02 is changed in the direction of decrease and the value of the mean learn value K02REF assumes a value close to 1.0 per mean learn, thus making the mean learn value K02REF stable on the map E80% .

Due to this reference fuel injection map change processing, the reference concentration map corresponding to the ethanol concentration is selected and therefore even when the ethanol concentration is changed during the usual operation it is possible to operate the engine 1 in an optimal state. Here, the reference fuel injection quantity map change processing explained in conjunction with Figure 14, the explanation has been made with respect to processing using the learned mean value K02REF as the reference. However, the starting information display device may be configured to perform the processing shown in Figure 14 by applying the required injection amount increase K02, calculated based on the oxygen concentration detected by the sensor 02 instead of the mean value. learned K02REF. In the following, together with Fig. 17 and Fig. 18, the explanation is made with respect to a motor start control when motor 1 is operated once again after being stopped. Here, Figure 17 shows a gram flow indicative of start control processing and Figure 18 is a view showing a change in TICR start injection time in start control processing.

Regarding start control, first of all, in step Sb1, during normal operation CPU 21 calculates the ethanol concentration based on the oxygen concentration detected by the 02 17 sensor and performs the average learning on the calculated ethanol concentration, thus calculating a learned value of ethanol concentration. Next, in step Sb2, the reference concentration is obtained by comparing the learned ethanol concentration value calculated in step Sb1 and the ethanol concentration range shown in figure 10 and as a predetermined set for storage in the EEP-ROM. 24 based on the reference concentration obtained, either the E22% map, the E50% map, the E80% map, and the E100% map, which constitute the reference fuel injection quantity maps, is selected and the predetermined set. selected and the reference concentration are stored in EEP-ROM 24 (step Sb3). Then a main switch (a main $ W) is turned off, thus stopping the electricity supply to the battery ECU 20 (step Sb4) and vehicle operation is stopped. Here, although information stored in RAM 22 is erased, information stored in ROM 23 and information stored in EEP-ROM is retained without being erased.

Prior to motor start 1, the main switch SW is turned on, and when the electricity supply to the battery ECU 20 is started, the start control control program is started on CPU 21. When the control program is started , CPU 21 calls the predetermined set held and stored in EEP-ROM 24 at step Sb5 and CPU 21 reads the starting injection information of the called predetermined set. Then processing proceeds to step Sb6 where CPU 21 obtains an initial value of the TICR starting injection time based on the starting injection table contained in the starting injection information, the intake air temperature TA, which is entered from the sensor of TA 13 and the water temperature TW of the cooling water, which is entered from the sensor of TW 15. Also, the CPU 21 also reads an Ati increment width, the repetition number N and the limit value. start injection time delay Tmax contained in the start injection information and performs adjustment of the respective information in the control program. Then, a start injection number variable n is reset to 0 and processing proceeds to step Sb7.

In step Sb7, CPU 21 determines whether motor operation is during startup or not. Then, when it is determined that engine operation is not during start-up, until starting is started, determination is continued. When it is determined that engine operation is during start-up, a value that is obtained by adding 1 to the starting injection number n overrides the starting injection number n in step Sb8 and processing proceeds to step Sb9. For example, during initial startup, 1 is added to the start injection number n, which is reset to 0 in step Sb6 so that n = 1 replaces the start injection number and processing proceeds to step Sb9. In step Sb9, it is determined whether the TICR start injection time is less than the TICR start injection time upper limit value is less than the upper limit value to Tmax start injection time or not. When it is determined that the TICR start injection time is less than the TICR start injection time upper limit is less than the Tmax start injection time limit value, processing proceeds to step Sb10, which determines whether the starting injection number n is equal to the repetition number N or not. When it is determined that the starting injection number n is equal to the repetition number N (the starting injection being performed by the predetermined repetition number N) in step Sb10, a value that is obtained by adding the increment width Ati to time TICR start injection present replaces TICR at step Sb11, start injection number n is reset to 0 at step Sb12, and processing proceeds to step Sb13.

In step Sb13, it is determined whether the start is complete or not, based on whether the present motor rotational speed Ne exceeds the predetermined rotational speed A or not in response to a CRK sensor detection signal. Here, when it is determined that the present motor rotational speed Ne exceeds the predetermined rotational speed A and the start is over, once the usual operation is already started, processing proceeds to step Sb14 and processing from step SB1 to Step Sb3 is performed repeatedly until the main switch SW is turned off while performing the injection control, that is, while performing the processing shown in Figure 14 at the time of performing the usual operation. On the other hand, when it is determined that the present rotational speed of motor Ne is equal to or less than the predetermined rotational speed A and the motor is still starting, processing returns to step Sb7 to continue control of the start.

Also, in step Sb9, when it is determined that the TICR start injection time is not less than the upper limit value of the Tmax start injection time, that is, when it is determined that the TICR start injection time arrives. in the upper injection time limit value Tmax and in step Sb10, when it is determined that the starting injection number n is not equal to the repetition number N, ie when it is determined that the starting injection does not arrive at the number of repeat, processing proceeds to step Sb13 in which CPU 21 performs start finish determination, while maintaining the TICR start injection time and the present start injection number n. Figure 18 is a view showing a change in TICR start injection time, when repetition number N is set to 4. TICR start injection time is similarly increased by one step increment width for each. One of four injections with the same starting injection time and after a TICR starting injection time arrives at an upper limit of Tmax starting injection time, starting is continued in a state where the starting injection time TICR is kept at the upper limit value. Here, the minimum TICR starting injection time value is the minimum injection amount required (lower limit oxygen concentration required injection amount) at the ethanol reference concentration set by the default setting and the maximum injection time value TICR is adjusted to be the maximum injection amount required (upper limit oxygen concentration required injection amount) at the ethanol concentration (see figure 12B.) Due to this processing, even when ethanol or gasoline is replenished, When the engine is stopped, the fuel mix ratio that remains in the fuel pipe maintains the state before refueling. As a result, by performing the start control, using the reference fuel injection quantity map corresponding to the ethanol reference concentration at the time of performing the usual operation, immediately before the main SW is turned off, it is possible to perform the fast start control in an appropriate state while obviating the buffer coverage with respect to motor 1. Also, in the processing shown in figure 17, each time the start injection number becomes the repeat number N, the time TICR start injection speed is incremented by Ati increment width. As a result, until the engine is started, it is possible to perform start control by gradually increasing the fuel injection time, ie by gradually increasing the amount of injected fuel injection from the injector 5.

Here, in the processing shown in Figure 17, the constitution that selects either the E22% map, the E50% map, the E80% map, and the E100% map, which constitute the reference fuel injection quantity map and stores the maps selected in EEP-ROM 24 is exemplified. However, the starting information display device may be configured such that only the learned ethanol concentration value or the ethanol reference concentration is stored in EEP-ROM 24 and the corresponding reference fuel injection quantity maps is read from ROM 23 based on the read value from EEP-ROM 24 at the time of the next starting time. Further, in the processing shown in Fig. 17, each time the starting injection number n arrives at the repetition number N, the TICR starting injection time is increased by the liquid. However, the T1-CR start injection time may be increased by the Ati increment width each time a period in which the injection is performed exceeds a fixed time.

In a vehicle having this engine control system, the TICR starting injection time corresponding to the environmental condition (ambient temperature, ethanol concentration or the like) may be adjusted and therefore the worsening of the starting capacity attributed to the time setting. fuel injection to approximately the fixed value can be avoided.

However, as can be clearly understood from Figure 5, Figure 7 and other drawings, when using mixed fuel, in a state where the ambient temperature is at or below the predetermined temperature (T0, T3, T0i, T02, Tra, Tw) an amount of change (ATICR) of the starting injection time with respect to the temperature change (AT) of ambient temperature is increased and the estimated ethanol reference concentration has a fixed concentration width and therefore, there is a possibility that an error will occur at an optimal starting injection time due to the difference between the established reference concentration and the actual ethanol concentration. As a result, when the ambient temperature becomes lower than the predetermined temperature (Toi, T02, T03, T04), a case arises in which the main motor body is not always favorable at an early start-up stage (capacity starting speed being reduced).

Consequently, in the starting information display device of this mode, the ethanol reference concentration by estimation based on the exhaust gas oxygen concentration, when the intake air temperature TA becomes lower than the predetermined temperatures ( T0ι, T02, Τ03ι T04) at their respective ethanol concentrations or when the intake air temperature TA becomes lower than the predetermined temperature T3, which is determined by adding the engine warm-up state (water temperature TW) to the CPU. 21 allows the starter exposure unit 35 to display information about the starter capacity.

To be more specific, the predetermined temperatures T01, T02> T03, To4, which require adjustment of TICR start injection times, corresponding to ambient temperatures, are primarily stored in ROM 23, corresponding to the four reference concentration species. of ethanol. When the main computer is turned on, CPU 21 reads the ethanol reference concentration from EEP-ROM24 and at the same time reads the predetermined temperature corresponding to the ethanol reference concentration from ROM 23, compares the readout temperature to a value of inlet air temperature detection TA entered from the TA 13 sensor and an input TW water temperature detection value from the TW 15 sensor and shows the influence expressed on the starting exposure unit 35.

For example, when the default E50% setting is stored in EEP-ROM 24 based on the estimated ethanol concentration during usual operation, CPU 21, when the main switch is turned on, calls the default setting of EEP-ROM 24. and at the same time, reads the map at the predetermined temperature T03 and the water temperature correction coefficient, which corresponds to 50% ethanol from ROM 23. Then, CPU 21 compares the map read with a temperature detection value. TA air inlet temperature of the TA 13 sensor and an input TW water temperature detection value of the TW 15 sensor. When the TA air inlet temperature, which includes 0 KTW water temperature correction coefficient is adjusted for the predetermined temperature To3 or below, the CPU 21 turns on the indicator lamp 46d, while when the intake air temperature TA exceeds the predetermined temperature T03, the CPU 21 turns off the indicator lamp 46d. Also, when information display device 55 is used as the starting display unit, CPU 21 performs substantially the same control using predetermined temperatures temperaturas0ι, T02, T03, T04, corresponding to ethanol reference concentrations as references. .

Here, in the above mentioned embodiments, four species of ethanol reference concentrations are established (E22%, E50%, E80%, E100%) and the predetermined temperatures (T01, T02, T03, TM) are adjusted in four stages corresponding to four species of reference ethanol concentrations. However, ethanol reference concentrations and predetermined temperatures may be set at additional multiple stages or may be set as continuous numerical values or the alcohol concentration within a fuel passage may be displayed by detection directly.

According to the start mode display information device of the fourth embodiment, the TICR start injection time corresponding to the fuel mixture ratio and ambient temperature can be established and therefore the worsening of the engine starting capacity attributed a change in environmental condition can be suppressed and at the same time it is possible to inform the possibility of the fact that the engine starting condition is not always favorable (engine starting capacity being reduced) at an assigned initial starting stage a delicate change in environmental condition for a driver before the engine is started.

According to the starting information display devices of the respective embodiments explained hereinbefore, it is possible to provide the starting information display device which enables the driver to recognize the state in which the worsening of the starting capacity is expected before the departure of the driver. engine with simple and economical constitution.

Brief Description of the Drawings Fig. 1 A schematic constitutional view of a starting information display device including an internal combustion engine of a vehicle to which the present invention is applied.

Fiaura 2 A block diagram showing the internal constitution of an ECU that controls the internal combustion engine and a connection relationship between the ECU and the sensors, an injector and a starting exposure unit.

Figure 3 A front view of a metering unit showing a constitutional example of a mobile exposure device.

Figure 4 A front view of the metering unit showing another constitutional example of the mobile exposure device.

Fiaura 5 A view showing a general relationship between an ambient temperature and a favorable starting injection time.

Figure 6 A front view of an indicator type meter, which is exemplified as an example of a starter exposure unit.

Figure 7A is a view showing a correlation relationship between a TW water temperature and a TICR starting injection time and Figure 7B is a view, exemplifying a starting capacity determination table.

Figure 8A is a view exemplifying a Pb / Ne map and Figure 8B is a view exemplifying a Ne / TH map.

Figure 9 A view exemplifying a table of correction coefficients to obtain an inlet air temperature correction coefficient. Figure 10 A view showing a reference concentration concentration range of ethanol.

Fiaura 11 A conceptual view of change processing of reference fuel injection maps.

Figure 12 A is a view showing a relationship between a cooling water temperature and a favorable starting injection time for each reference concentration and Figure 12B is a view showing a relationship between the ethanol concentration and a time starting injection nozzle at a fixed water temperature.

Fiaura 13 A view showing a reference fuel injection map.

Figure 14 A flowchart showing map change processing at the time of performing a usual operation.

Figure 15 A view showing a calculation region of a K02REF, which is referenced in change processing at the time of performing a usual operation.

Figure 16 A view showing a limit value of K02REF, which is referenced in map change processing at the time of performing a usual operation.

Fiaura 17 Flowchart showing a start control processing.

Fiaura 18 A view showing a TICR change in start control processing.

Claims (3)

1. Vehicle information starting device (55), including an engine (1) capable of using a mixed fuel, which is produced by the mixture of multiple fuel species, the starting information display device; (55) comprising: an air temperature detector (13,18) which detects the temperature of an external air or air received in the engine (1); and an exposure means (35), provides an exposure on engine starting capacity (1) prior to engine starting (1) based on the outside air or intake air temperature detected by the air temperature detector ( 13,18), wherein the exposure means (35) is configured to display information when the outside air or air temperature detected by the air temperature detector (13) becomes lower than a predetermined starting temperature, which is preset based on the influence that reduces engine starting capability (1) when mixed fuel is used, characterized in that the starting information display device (55) still includes a means of detecting oxygen concentration (17) that detects the oxygen concentration contained in an engine exhaust gas (1) and a mixture ratio estimation means, which estimates a mixture ratio of the multiple fuel species in the fuel l Mixed in response to the oxygen concentration detected by the oxygen concentration detection means (17) and the exposure medium (35) is configured to change the predetermined starting temperature in response to the estimated mixing ratio by the ratio estimation means. and where the reference ethanol concentration is made by estimation based on the exhaust gas oxygen concentration, when the intake air temperature (TA) becomes lower than the predetermined temperatures (Τ0ι, T02, T03, T04) at their respective ethanol concentrations, the starting exposure medium (35) shows information about the starting capacity. Starting information display device (55) of a vehicle according to claim 1, characterized in that a display portion on the display means is mounted on a mobile display device (40, 50); which shows a moving state of a vehicle to a driver. Vehicle information starting device (55) according to claim 1, characterized in that the starting information display device (55) further includes a heating state detection means which detects a motor warm-up state (1) and the exposure means is configured to change the predetermined starting temperature in response to the motor warm-up state detected by the warm-up state detection means.