JP2002061555A - Engine controller comprising failure detecting device of starting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine controller comprising a failure detecting device of starting system capable of surely determing the failure of a start inhibiting means for inhibiting the start of an engine in the case of connecting a filling nozzle to a fuel filling port of an automobile, that is, during the filling of the fuel to a fuel storage means of the engine, and a control means in failure. SOLUTION: This engine controller comprises the failure detecting device of the starting system having a fuel storage means, a starting means for starting the engine, a filling condition detecting means for detecting a fuel filling condition to the fuel storage means, and a starting condition detecting means for detecting a starting condition of the engine. The failure detecting device of starting system comprises a failure determinig means and a start inhibiting means in fuel filling for inhibiting the start by the starting means in the case of detecting the fuel filling condition by the filling condition detecting means. The failure determining means determines the failure of the start inhibiting means in fuel filling the case when the starting condition detecting means detects the starting condition when the start is inhibited by the start inhibiting means in fuel fill.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine control device having a starting system failure detection device, and more particularly to an engine of a type in which fuel such as gaseous fuel is charged from a small (simplified) charging device into the engine. The present invention relates to an engine control device provided with a starting system failure detection device.

[0002]

2. Description of the Related Art In recent years, the demand for environmental protection and economy surrounding automobiles has been steadily reinforced, and in particular, purification regulations of exhaust gas containing components such as HC and CO discharged from engines, and There is a growing demand for an improvement in the engine fuel consumption rate. On the other hand, fuels currently used in current engines are mainly liquid fuels such as gasoline and light oil, but the liquid fuels are limited in reserves.
In the future, there is a concern that a shortage of supply of the liquid fuel will occur and fuel prices will rise. For this reason, vehicles using alternative energy have been rapidly developed, and representative examples of vehicles using the alternative energy include electric vehicles, hybrid vehicles using liquid fuel and electricity, alcohol and gas. (Natural gas, propane gas, hydrogen gas, etc.) as a fuel vehicle.

[0003] The alternative energy vehicle as described above has many problems that must be solved in terms of infrastructure such as fuel supply facilities or in terms of manufacturing costs. At present, among the alternative energy vehicles, natural gas vehicles are one step ahead in overall aspects including the infrastructure and production costs, and the natural gas vehicles use less fuel. Since methane gas is used as a main component, it is possible to reduce the amount of exhaust gas emitted as compared with a conventional liquid fuel vehicle.

[0004] The development of infrastructure such as fuel supply facilities enables fuel filling not only at predetermined fuel filling stations but also through the spread of small filling equipment (including household use). When the engine is started while the nozzle is still connected and the vehicle is running, in the case of a small filling machine, dragging or breakage is caused, gas leakage from the filling device, or failure of the fuel filling port. May cause gas leakage.

In the prior art, a fuel filling port switch is connected in series to a power supply line of a starter for starting an engine, and during charging, the power supply line of the starter is cut off by the filling port switch to start the engine. Safety is ensured by providing a prohibiting start prohibition unit. However, the start prohibiting means for prohibiting the start of the engine is generally configured as a system of a different system from the engine control device (control unit).

[0006]

By the way, in the conventional system having the start prohibiting means for prohibiting the start of the engine, the means is provided in the automobile so that the filling nozzle is connected to the fuel filling port of the automobile. Since the vehicle is not driven by starting the engine in this state, the reliability at the time of starting the engine is ensured by the system.
Various connection methods have been devised for the system in case of a failure of the system. However, in any of the connection methods, at present, the main system configuration uses a conductive wire (harness), a switch, and a relay.

[0007] Further, since the system does not include a control device, if the system fails, it is impossible to determine whether any of the harness, the switch, and the relay, which are connection parts, has failed. If the system component breaks down, there is a concern that safety will be reduced. For example, in the case of a switch failure, the switch should actually be in the open (cut off) state due to filling, but if the switch is shorted (short circuit) for some reason or the relay is stuck in the short state (conductive), the system Will not work properly.

[0008] The increase in the filling work in places other than the filling station is as follows.
The above-mentioned infrastructure development (furthermore, the spread of household filling equipment) shows an increasing trend. However, it is expected that the number of work errors will increase, and the safety of filling work will be secured more than before. It must be done strictly. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide a state in which a filling nozzle is connected to a fuel filling port of an automobile, that is, a state in which fuel is supplied to fuel storage means of an engine. During the charging of the starting system failure detecting device capable of accurately determining the failure of the start prohibiting means for prohibiting the start of the engine,
An object of the present invention is to provide an engine control device provided with a control unit at the time of failure.

[0009]

In order to achieve the above object,
The engine control device according to the present invention includes a fuel storage unit, a start unit that starts the engine, a filling state detection unit that detects a state of filling the fuel storage unit with fuel, and a state in which the engine is started. A starting-system failure detecting device having a starting-state detecting means, wherein the starting-system failure detecting device starts when the starting means detects a fuel-filled state by the failure-determining means and the charged-state detecting means. And a failure judging means for prohibiting the fuel filling when the starting state detecting means detects the starting state when the starting is prohibited by the fuel filling start prohibiting means. It is characterized in that the medium start prohibition means is determined to be out of order.

In the engine control apparatus provided with the starting system failure detecting device according to the present invention, the starting state detecting means detects the starting state when the starting is prohibited by the starting prohibiting means during fuel filling. In this case, the failure determination means determines that the fuel-initiated start prohibition means is a failure, so that it is possible to prevent unexpected engine start and vehicle movement in a fuel-filled state, and an improvement in safety is expected. it can.

Further, in a specific embodiment of the engine control apparatus provided with the starting system failure detecting device according to the present invention, the starting state detecting means is connected to the starting means so as to start / start the starting means.
The starting state is detected based on a determination signal corresponding to the stop, and the starting state is detected based on an output signal from the operating state detecting means. The output signal from the operating state detecting means includes an engine rotation parameter, a battery voltage, It is a parameter, an intake air parameter, or a vehicle speed parameter.

As described above, it is possible to easily detect a failure of the engine start system from the start / stop information of the engine or the operating state of the engine. Further, another specific mode of the engine control device provided with the starting system failure detecting device of the present invention is configured such that the detection of the fuel filling state by the filling state detecting means is performed separately from the fuel filling port of the vehicle and the vehicle. The method is performed based on the connection state with the external filling device, or based on the transition of the amount of fuel stored in the fuel storage means.

Still another specific embodiment of the engine control apparatus provided with the starting system failure detecting device according to the present invention is characterized in that when the failure prohibiting means determines that the fuel-supplying start prohibiting means has failed, The fuel supply to the engine is stopped by the supply stopping means, and the fuel supply stopping means is operated by operating the fuel injection device, or a fuel supply cutoff provided between the fuel storage cylinder and the fuel injection device. It is characterized in that it is implemented by operating the device.

According to the above configuration, the operation of the engine can be stopped at the same time as the failure of the start prohibiting means during the fuel filling. Therefore, careless running of the vehicle can be prevented, and dragging or damage of the filling device can be prevented. Gas leakage from the filling device,
Alternatively, gas leakage due to failure of the fuel filling port does not occur. Still another specific embodiment of the engine control device provided with the starting system failure detection device of the present invention is configured such that when the failure determination unit determines that the fuel-supplying start prohibition unit has failed, an alarm device is provided. It is characterized in that an alarm is issued, the failure information is stored in a memory, and when there is a request for output of failure information from an externally connected diagnostic device, the failure information in the memory is output.

According to the above configuration, a driver or the like can be informed, and a determination parameter for determining a failure state is also stored in the RAM at the same time. By the transfer, the serviceability is further improved, and the repair of the failed part can be promoted.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an engine control apparatus provided with a starting system failure detecting device according to the present invention. FIG. 1 is an overall configuration diagram of an engine system of an engine control device including the starting system failure detection device of the present embodiment.

In the engine 1, an intake pipe 4 and an exhaust pipe 5 are connected to each of the cylinders 2, and a spark plug 7 is attached to the cylinder 2, and the intake pipe 4 is connected to the cylinder 2. An indicator 18 is attached. An air cleaner 3 and a throttle valve 23 are arranged upstream of the intake pipe 4, and an air flow sensor 6 and a throttle sensor 21 are attached. An oxygen sensor 20 is attached to the exhaust pipe 5, and a water temperature sensor 8 is attached to the cylinder 2.

The status information of the engine 1 includes the air cleaner 3
, An intake air amount detection sensor 6 that measures the mass flow rate of intake air that is drawn into the engine 1 through the intake pipe 4, a water temperature sensor 8 that measures the cooling water temperature of the engine, an intake temperature sensor 9 that measures the intake air temperature, Controls signals detected from a crank angle sensor for detecting a crank angle (not shown), a throttle sensor 21 for detecting a throttle valve angle, a vehicle speed sensor for detecting a rotational speed of a drive shaft for driving wheels (not shown), and the like. The control unit 24 calculates the engine speed from the crank angle sensor signal, and calculates the engine load from the throttle opening, the intake air amount, and the engine speed.

The control unit (control device) 24 calculates an optimum fuel injection pulse width, fuel injection timing, ignition timing, and the like to be supplied to the engine 1 based on various information. Control to inject fuel. Further, in the ignition system, an ignition timing suitable for the operation state is calculated based on various information from the various sensors, and the mixture in the combustion chamber is supplied to the ignition plug 7 by energizing / cutting off an ignition coil (not shown). Ignite. Further, the control unit 24 calculates a feedback correction value based on a signal from the exhaust sensor 20 that measures the oxygen concentration in the exhaust gas discharged through the exhaust pipe 5, and controls the fuel so that the mixture becomes the stoichiometric air-fuel ratio. Correct the injection pulse width.

On the other hand, the gaseous fuel supply system includes a fuel cylinder 10 for storing gaseous fuel, a filling port 19 for filling gaseous fuel from the filling device at a high pressure into the fuel cylinder 10,
Pressure regulating valve (regulator) 1 for adjusting fuel pressure of fuel injection
6. Injector 18 for injecting fuel, cylinder 10
High-pressure pipe 15 connecting the regulator 16 and the regulator 16, a low-pressure pipe 17 connecting the regulator 16 and the injector 18, the cylinder side of the high-pressure pipe 15, and the regulator 1.
A fuel temperature sensor 1 which is installed in the shut-off valves 11 and 12 installed on the 6 side and the fuel state (fuel temperature, fuel pressure) installed in the low pressure pipe 17
3 and a fuel pressure sensor 14, and a high-pressure pipe 15 is provided with a high-pressure-compatible fuel pressure sensor (not shown) and a fuel temperature sensor that detect abnormal fuel pressure and fuel temperature in the high-pressure pipe.

A starter signal from a starter 22 is input to the control unit 24 to determine whether the engine 1 is started or not. FIG. 2 shows an example of an engine start system (actually,
The connection is more complicated than shown, and there are other system connection methods, but this time, to simplify the explanation,
The description will be made based on the system connection as shown in FIG. 2 and the description regarding other connection will be omitted.)

Downstream of the positive electrode of the battery 33, a manually operated main switch 34 (commonly called an ignition switch) is installed, and the power supply to the vehicle and the engine 1 is turned on / off by turning the main switch 34 on and off. .
On this downstream side, a starter switch 35 and a filling switch 36 are installed in parallel. Usually, the main switch 34 and the starter switch 35 are integrated by a driver's seat key cylinder. The filling switch 36 is integrated with the filling port 19, and is turned on and off by inserting and removing a filling nozzle during filling.

Downstream of the two switches 35 and 36, there is a sub-relay 37. When a filling nozzle is not inserted in the filling port 19, the filling switch is ON (conducting state) and the starter switch 35 is ON (conducting state). ), The further downstream starter relay 38 is driven, and a large current is supplied to the starter 2.
The engine 1 is started (cranking) by the rotation of the starter 22.

When a filling nozzle is inserted in the filling port 19, the filling switch 36 is turned off (in a cutoff state).
Thus, even if the starter switch 35 is turned on (conducting state), power is not supplied to the starter 22, and the start of the engine during charging is prohibited, and safety can be ensured. The above is the outline of the system configuration that is the premise of the present embodiment. Next, the outline of the present embodiment will be described with reference to the control flowchart of FIG. 3 (this flowchart is routinely processed at regular time intervals). .

The present embodiment focuses on monitoring of the start prohibition system during charging. In step 25, the charging state of gaseous fuel is detected. As shown in FIGS. 4 and 5, there are two types of detection methods of the filling state. One is a method of electrically detecting the connection state of the filling port in FIG. One is a method of detecting by the state of the charged gaseous fuel in FIG.

One of the detection methods in FIG. 4 is a method in which the potential state on the upstream side of the charging switch 36 described in FIG. When not filling,
Since the filling switch 36 is ON, the state (LidSW) b of the control unit 24 becomes Low when the main switch 34 is ON, and the state (LidSW) b during filling.
Becomes High level. At this input level, it can be determined whether or not gas fuel is being charged.

Another method of FIG.
6 system without cost detection (cost reduction),
Or, even if the charging switch 36 is provided,
This is a method for further securing safety in the event that the fuel tank breaks down for some reason.
The fuel pressure in the fuel storage cylinder increases as shown in FIG. 5 (a), and eventually reaches the maximum fuel pressure (about 200 atm in Japan) if the fuel is being charged.

In this embodiment, in order to clarify the filling state, as shown in FIG. 5B, the internal pressure of the cylinder is obtained as the change amount (change ratio), and the change amount is equal to or larger than the threshold value PT. If it is, it is determined that charging is being performed. Incidentally, the threshold value PT is set between a rise in fuel pressure due to the outside air temperature that occurs in a natural standing state and a rise in fuel pressure that is pressurized by the filling machine. However, this is only the main switch 34
Is not in the ON state, measurement is not possible. In the present embodiment, a small-sized filling machine for home use is assumed. (Image of filling completed overnight)), the filling port 19 of the driver caused by the long filling time.
It is effective in preventing forgetting to pull out.

Returning to FIG. 3 again, it is determined whether or not the fuel is being charged by the method described above. If the fuel is not being charged, the present routine is terminated as it is. Transition. In step 27, the operation state of the engine 1 and the vehicle (for example, the control unit 24
The engine speed and the vehicle speed information input in step (1) are detected, and the starting state is detected in step 28 based on the detected value (the starting state detecting method will be described later).

If it is determined in step 29 that the engine is not in the starting state, the present routine is terminated as it is. If it is determined that the engine is in the starting state, the process proceeds to step 30 to determine that the safety system of the starting system is being filled and starting. Is determined not to be activated (failure of the start prohibition means), and this flowchart ends. The technical items of step 29 and step 30 are features of the present embodiment. Next, the starting state detecting means of the present embodiment will be described.

FIG. 6 describes the signal (STSW) a level which is taken into the control unit 24 upstream of the starter switch 35 depending on the intermittent state of the filling switch 36 and the start switch 35 (starter switch). When the starter switch 35 is ON and the filling switch is ON, the level becomes Low. When the starter switch 35 is ON and the filling switch is OFF, Hig is set.
It becomes the h level and is taken into the control unit 24. That is, when the engine is in the low state,
The high state means that the engine is stopped. The starting state can be determined from the signal (STSW) a.

Here, securing of the reliability of the sub-relay 37 will be described a little. If the sub-relay 37 is out of order, especially if it is stuck (always ON: conductive state regardless of ON / OFF of the filling switch 36), the start prohibition by the state of the filling switch 36 is not possible. It goes without saying that it is possible. Generally, the relay is ON
There are rare occurrences of arc discharge due to repetition of / OFF and sticking due to the arc discharge or the like. In particular, recently, there is a strong demand for low cost, and there is a concern that the reliability of the relay may be reduced. Therefore, a system configuration is also required in which the relay is fixed (FIG. 8 shows a state where the sub-relay 37 is fixed). )

In this embodiment, by monitoring the STSW level a, it is possible to detect the failure state of the sub-relay. That is, as shown in FIG.
In the state of N, the fact that the STSW level a always becomes the Low level regardless of the ON / OFF state of the filling switch 36 is used. Therefore, by monitoring the STSW level in each state of the charging switch 36 and the start switch 35, it is possible to determine the start state and the system failure (relay failure).

Next, the starting state detecting means of this embodiment will be described with reference to FIGS. FIG. 9 shows the states of the start switch 35 and the charging switch 36 with respect to a change in the engine speed, which is one of the operation state detection signals. (A) shows the state of the charging switch, (b) shows the state of the start switch (starter switch), and (c) shows the engine speed. In a normal state, the filling switch 36 is in the cut-off state, and the starter switch 3
If 5 is in the conductive state, the engine is in the start-prohibited state, so that the engine speed cannot be generated (increased) by cranking (the engine speed in (c) is a dotted line). However, in the above state, if the engine speed increases (the engine speed in FIG. 9 becomes a solid line state and exceeds the threshold value N), for some reason, the engine has reached the start state in which the start is permitted. Can be determined. Furthermore, it is also possible to distinguish from pushing (downhill) by combining with the state of the vehicle speed signal.

FIG. 10 shows a state in which the voltage of the battery 33 is taken into the control unit 24 and the start is determined based on a change in the voltage, similarly to FIG. When the engine 1 is started by the starter 22, a large current is required. If cranking is started for some reason, the battery voltage drops significantly from about 12 V when the engine is stopped (FIG. 10). , Threshold V1
Below). Further, when the engine continues to rotate thereafter, the voltage is reduced to about 1 by the power generation of the alternator.
It rises to about 4.4V (exceeding V2 in FIG. 10).
Thus, the start can be determined by detecting the battery state.

FIG. 11 shows a method of judging the start according to the signal of the intake air amount detection sensor 6. In the stopped state of the engine, no air is sucked into the engine 1.
When the engine is started for some reason, the amount of intake air is detected as shown in FIG. 11. When the amount of intake air exceeds the threshold value Q, the amount of intake air is detected. A start can be determined.

FIG. 12 is not a method for directly judging the start of the engine, but an auxiliary embodiment. In this embodiment, the movement of the vehicle is detected based on the vehicle speed. In other words, if the vehicle runs in the filling state, the filling machine is dragged (gas leakage occurs due to damage of the filling machine), and this state must never occur. Therefore, as shown in FIG. 12, the vehicle speed is monitored, and when the vehicle speed exceeds the threshold value SP, the vehicle is determined to be started (self-propelled).

The above-described various start determination methods may be used alone or in combination.
As described above, various methods for detecting the filling state and the starting state of the present embodiment and performing the failure determination of the start prohibition unit have been described. Next, the processing after the failure determination of the start prohibition unit will be described.

FIG. 13 is a control flowchart, which is substantially the same as FIG. 3, showing the failure determination of the start inhibiting means and the subsequent control processing. In step 26, it is determined whether or not the fuel is being charged. In step 29, it is determined whether or not the engine is in the starting state. Based on the result, in step 30, the failure of the starting prohibiting means is determined. If a failure is determined, step 3
In step 9, the fuel supply to the engine 1 is stopped (cut off), and the engine 1 is stopped by the stop (disables the vehicle).
To ensure safety by preventing damage to the filling equipment.

That is, in a situation where charging is being performed and starting of the engine is to be prohibited, the engine 1 shuts off the fuel in order to never start the engine. There are the following two methods for shutting off the fuel supply. One method is to stop the fuel injection from the fuel injection device (injector 18) of the engine 1 shown in FIG.
The fuel cutoff valve 11 installed in the high pressure pipe 15 shown in FIG.
Alternatively, the fuel cutoff valve 12 cuts off the fuel path. According to the above two methods, when the start prohibition means breaks down, the fuel passage in the fuel pipe is shifted to the shut-off state, and the fuel supply can be stopped. In the above method, the method of shutting off the fuel supply by the injector 18 is more effective, so if the start prohibiting means is determined to be out of order, the fuel supply by the injector 18 is first shut off, and then the fuel supply is stopped. Fuel cut-off valve 1
It is good to shut off the fuel at 1,12.

The method of shutting off fuel at the time of failure determination of the start prohibiting means has been described above. Next, an embodiment for improving serviceability, for example, notifying a driver, a dealer mechanic, etc. of a failure state. Describe. FIG.
Corresponds to the control unit 24 shown in FIG.
FIG. 5 is a diagram showing a state in which an external alarm device 51 and an external diagnostic device 52 are connected to each other. For example, the external alarm device 51 is a lamp or a buzzer mounted in a meter panel, and the external diagnostic device 52 is a failure diagnostic tester used for vehicle inspection, periodic inspection, and the like of a dealer mechanic. The connection with the external diagnostic device 52 is established by connecting with a dedicated connector when necessary. Examples of the communication method include serial communication using a plurality of lines, single line, and multiplex communication using an optical cable.

FIG. 15 is a control flowchart showing an alarming means for the external alarming device 51. FIG.
However, only step 39 and step 53 are different. If it is determined in steps 26, 29, and 30 that the start prohibiting means has failed, an output to the external alarm device 51 is performed in step 53. Specifically, if the external alarm device 51 is a lamp, the power supply to the lamp is controlled in step 53 to turn on the lamp.

FIGS. 16 and 17 are control flowcharts showing an outline of a method of transferring information with the external diagnostic device 52.
FIG. 16 shows a method of storing the failure determination information of the start prohibition means in the memory in the control unit 24. Steps 26, 29, and 30 are the same as those in FIG. In step 54, an area (for example, flag information) corresponding to the failure of the start prohibiting means is set in a storage RAM for storing various failure histories.
When it is determined that the start prohibiting means is out of order, information is stored in this area. For example, at normal time, the flag is set to 0.
(Clear), when abnormal, the flag is set to 1 (set).

FIG. 17 is a control flowchart relating to the exchange of information with the external diagnostic device 52. In step 55, it is determined whether or not there is a request for output of failure information from the external diagnostic device 52. In the external diagnostic device 52, the service mechanic sends a request for output of failure information to the external diagnostic device 52.
, Or by setting a preset automatic diagnosis process in the external diagnosis device 52, and outputs a failure information output request signal to the control unit 24 via a communication line. If it is determined in step 55 that there is no request, the routine is terminated. If it is determined that there is a request, the process proceeds to step 56, and the failure information (for example, flag information) stored in FIG. 16 is called. Step 5
At 7, the failure information is output to the external diagnostic device 52 via the communication line, and the external diagnostic device 52 displays a failure code or a failure site based on the failure information on the screen (display) of the external diagnostic device 52. .

With the above control means, the external diagnostic device 52
, The failure information can be transferred to the server, and the serviceability can be improved. More specifically, the determination parameters (for example, the engine speed and the battery voltage described above in the determination of the starting state) at the time of determining the failure state are also stored in the RAM at the same time. , The serviceability is further improved, and the repair of the failed part can be promoted.

As described above, the engine start system failure detection device of the present embodiment can prevent unexpected engine start and vehicle movement based on the failure of the start prohibition means in the charged state, thereby improving safety. be able to. As described above, one embodiment of the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment, and various designs may be made without departing from the spirit of the invention described in the claims. It can be changed.

For example, in the above embodiment, the gaseous fuel is described as natural gas, but the gaseous fuel is not limited to natural gas, and other gaseous fuels can be applied to the present invention. When a small household charger such as an electric vehicle or a hybrid vehicle is used, the present invention is also applicable to an electric leakage prevention function based on dragging of the small charger.

[0048]

As can be understood from the above description, the engine control device provided with the starting system failure detecting device of the present invention is:
When the starting state detecting means detects a starting state when the starting is prohibited by the fuel filling start prohibiting means, the starting state detecting means detects the starting state. In addition, since the failure determination means determines that the fuel-initiated start prohibition means is a failure, it is possible to prevent unexpected engine start and vehicle movement in the fuel-filled state, and an improvement in safety can be expected.

Further, the provision of the external alarm device allows the driver or the like to be informed, and the failure judgment information of the start prohibiting means is stored in the memory in the control device. When the output request is transmitted as the failure information together with the flag information, the serviceability is further improved, and the repair of the failed part can be promoted.

[Brief description of the drawings]

FIG. 1 is an overall system configuration diagram showing an embodiment of an engine control device including a starting system failure detection device according to the present invention.

FIG. 2 is a diagram showing an example of an engine starting system of the starting system failure detecting device of FIG. 1;

FIG. 3 is a control flowchart of the starting system failure detection device of FIG. 1;

FIG. 4 is a table showing a signal state of a filling switch of a means for electrically detecting a connection state of a filling port of the starting system failure detecting device of FIG. 1;

FIG. 5 is a diagram showing a pressure state of a charged gaseous fuel in the cylinder of the starting system failure detection device of FIG. 1;

FIG. 6 is a diagram showing a signal state of a start switch in a normal state of the start system failure detection device of FIG. 1;

FIG. 7 is a diagram showing a signal state of a start switch when an abnormality occurs in the start system failure detection device of FIG. 1;

FIG. 8 is a diagram showing a state of the engine starting system of FIG. 2 at the time of failure.

FIG. 9 is a timing chart of a start state determination showing states of a start switch and a charging switch with respect to a change in engine speed of the engine start system of FIG. 2;

FIG. 10 is a timing chart of a start state determination showing states of a start switch and a charging switch with respect to a change in a battery voltage of the engine start system of FIG. 2;

FIG. 11 is a timing chart of a starting state determination showing states of a starting switch and a filling switch with respect to a change in an intake air amount of the engine starting system of FIG. 2;

FIG. 12 is a timing chart of a start state determination showing states of a start switch and a filling switch with respect to a change in vehicle speed of the vehicle in the engine start system of FIG. 2;

FIG. 13 is a control flowchart showing a failure determination of a start prohibition unit of the engine start system failure detection device of FIG. 1 and a control process thereafter.

FIG. 14 is a system configuration diagram in which an external diagnosis device is added to the starting system failure detection device of FIG. 1;

FIG. 15 is a control flowchart of the starting system failure detection device of FIG. 14;

FIG. 16 is a control flowchart for storing failure determination information of a start prohibition unit of the startup system failure detection device of FIG. 1 in a memory in a control unit.

FIG. 17 is a control flowchart relating to the exchange of information with the external diagnostic device of the starting system failure detecting device of FIG. 14;

[Explanation of reference numerals] Engine 2. 7. Engine cylinder Water temperature sensor 9. Intake air temperature sensor 10. Cylinder 11. Fuel cutoff valve 12. 12. Fuel cutoff valve 13. Fuel temperature sensor Fuel pressure sensor 16, regulator 18. Injector 20. Exhaust sensor 22. Starter 24. Control unit 33. Battery 35. Starter switch 36. Fill switch 51. External alarm device 52. External diagnostic device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02D 45/00 364 F02D 45/00 364K 364L 376 376B F02N 15/00 F02N 15/00 C (72) Inventor Masahiro Sato 2477 Takaba, Hitachinaka City, Ibaraki Prefecture Inside Hitachi Car Engineering Co., Ltd. (72) Inventor Hiroto Nishiide 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Nissan Motor Co., Ltd. (72) Inventor Taku Yamada Yokohama, Kanagawa Prefecture 2 Takaracho, Kanagawa-ku, Nissan Motor Co., Ltd. (72) Inventor Tsuyoshi Kato 6-6-1 Okada, Samukawa-cho, Koza-gun, Kanagawa Prefecture F-term in Nissan Koki Co., Ltd. 3G084 BA13 BA28 BA33 CA01 CA07 DA27 DA28 EA11 EB06 EB22 FA00 FA03 FA05 FA07 FA33 FA36 FA38 3G301 HA22 JB09 JB10 KA01 KA26 KA28 MA11 MA24 NE19 PA01Z PB00Z PE01Z PE03Z PF01Z PG01Z

Claims (14)

[Claims] 1. A fuel storage means, a start means for starting an engine, a charge state detection means for detecting a state of fuel filling of the fuel storage means, and a start state detection for detecting a state in which the engine is started. And a starting system failure detecting device comprising: a starting system failure detecting device, wherein the starting system failure detecting device comprises: a failure judging unit; and a fuel filling state detected by the filling state detecting unit. A start-up prohibiting unit during fuel filling that prohibits start-up by the start-up unit, wherein the failure determination unit detects the start-up state by the start-up state detection unit when the start-up is prohibited by the start-up prohibition unit during fuel filling. An engine control device provided with a starting system failure detecting device, wherein the starting prohibition means during fuel filling is determined to be in failure. 2. The engine according to claim 1, wherein the starting state detecting means detects a starting state based on a determination signal corresponding to starting / stopping of the starting means in conjunction with the starting means. Starting system failure detection device. 3. The engine control device according to claim 1, wherein the starting state detecting means detects a starting state based on an output signal from the operating state detecting means. 4. The engine control apparatus according to claim 3, wherein the output signal from the operation state detection means is an engine rotation parameter. 5. The engine control apparatus according to claim 3, wherein the output signal from the operating state detecting means is a battery voltage parameter. 6. The engine control apparatus according to claim 3, wherein the output signal from the operating state detecting means is an intake air parameter. 7. The engine control apparatus according to claim 3, wherein the output signal from the operating state detecting means is a vehicle speed parameter. 8. The fuel filling state detection by the filling state detecting means is performed based on a connection state between a fuel filling port of the vehicle and an external filling device different from the vehicle. An engine control device provided with the starting system failure detection device according to the above. 9. The starting system failure detecting apparatus according to claim 8, wherein the detection of the fuel filling state by the filling state detecting means is performed based on a transition of a fuel storage amount in the fuel storing means. Equipped engine control device. 10. The starting system according to claim 1, wherein when the failure determination means determines that the start-up inhibiting means during fuel filling is a failure, the fuel supply to the engine is stopped by the fuel supply stop means. An engine control device equipped with a failure detection device. 11. The engine control device according to claim 10, wherein the fuel supply stopping unit is implemented by operating the fuel injection device. 12. The starting system according to claim 10, wherein said fuel supply stopping means is implemented by operating a fuel supply cutoff device provided between said fuel storage cylinder and a fuel injection device. An engine control device equipped with a failure detection device. 13. The engine equipped with a starting system failure detecting device according to claim 1, wherein when the failure determining unit determines that the fuel-initiating start prohibition unit has failed, a warning device issues a warning. Control device. 14. When the failure judging means judges that the fuel-initiating start prohibition means is a failure, the failure information is stored in a memory, and a failure information output request is sent from an externally connected external diagnostic device. 2. The engine control device according to claim 1, wherein the failure information in the memory is output in some cases.