JP2006177253A - Gas charging failure diagnosis system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately perform failure diagnosis in gas charging action. <P>SOLUTION: This system is provided with a receptacle 1 having a charging nozzle 8 connected and receiving supply of gas, a valve element 2 provided on the receptacle and arranged in a fuel gas flow passage 7, an attachment and detachment detection switch 5 detecting an attachment and detachment condition of the receptacle 1 and the charging nozzle 8, and an on-vehicle computer diagnosing irregularity of the valve element and the charging nozzle 8 under gas charged condition and gas non-charged condition based on a valve open/valve close condition of the valve element 2 detected by a hall IC 4 and the attachment and detachment condition of the charging nozzle 8 detected by the attachment and detachment detection switch 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas filling fault diagnosis system that performs fault diagnosis in a system that charges high pressure gas.

  Conventionally, as this type of technology, for example, those described in the following documents are known (see Patent Document 1). In this document 1, for example, in a device that monitors the operating state of an electromagnetic valve that is controlled to open and close by the movement of a plunger that accompanies excitation of an electromagnetic valve that is used when filling high-pressure gas, the plunger serves as a stopper from the start of driving of the electromagnetic valve coil. By comparing the time until the valve is fully opened before the collision with the reference time determined according to the voltage applied to the solenoid valve coil, even if the valve is clogged with dust, the valve stroke is shortened and the fully open time is reduced. Since it becomes shorter, an invention that can reliably detect abnormal operation of a solenoid valve is described.

Further, in Patent Document 2 shown below, in a gas filling coupling used when injecting high-pressure gas into a tank to be filled, in the gas filling coupling, when the filling preparation switch is turned on, the control device When the compressed air is supplied to the main valve cylinder of the gas-filled coupling by opening the air on-off valve of the pipeline, and the compressed air is introduced into the cylinder chamber via the air pipeline, the piston portion of the main valve cylinder Is described, and the second passage moves to a valve opening position communicating with the annular groove and the connection port, so that the main valve cylinder is easily and smoothly opened by the pressure of the compressed air. ing.
Japanese Patent Publication No. 60-22229 JP 2004-52996 A

  Since the technique described in the above-mentioned document 1 employs a method of monitoring the open / close state of the solenoid valve using the relationship between the current value flowing through the solenoid valve coil and the time, the detection of the open / close state of the solenoid valve is detected by the solenoid valve. Therefore, in order to determine the failure mode of the solenoid valve, it was necessary to define a normal travel speed profile of the solenoid valve.

  However, when the moving speed of the valve body varies greatly depending on the supply flow rate of the high-pressure gas from the high-pressure gas supply facility, such as a receptacle used for a high-pressure gas filling port in a vehicle using high-pressure gas as a fuel, It was very difficult to define a moving speed profile. For this reason, there has been a problem that failure modes related to the gas filling operation such as a connection failure between the receptacle and the high-pressure gas supply side nozzle and an open fixing of the receptacle cannot be reliably detected.

  Further, even the technique described in the above-mentioned document 2 has not yet solved the above problem.

  Therefore, the present invention has been made in view of the above, and an object of the present invention is to provide a gas filling failure diagnosis system capable of accurately performing a failure diagnosis in a gas filling operation.

  In order to achieve the above object, a means for solving the problems of the present invention includes a receptacle to which a gas supply source filling nozzle is connected at the time of gas filling, and a gas flow path provided in the receptacle. A first valve body provided with a valve opening / closing detection means for controlling the valve opening / closing state to flow / shut off gas and detect the valve opening / closing state; and the receptacle A desorption detecting means for detecting a desorption state between the valve and the filling nozzle; a valve open / closed state of the first valve element detected by the valve opening / closing detection means; and a detection by the desorption detection means And a diagnostic control means for diagnosing an abnormality of the first valve body and the filling nozzle during gas filling and gas non-filling based on the desorption state of the filling nozzle.

  According to the present invention, it is possible to directly detect the connection state between the receptacle and the filling nozzle and the opening / closing state of the first valve body during gas filling and non-filling. Thereby, it becomes possible to carry out the failure diagnosis of the first valve body and the filling nozzle with high accuracy, gas leakage is prevented, and safety can be improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiment for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a gas filling failure diagnosis system according to a first embodiment of the present invention. FIG. 1 (a) illustrates a normal state (not filled) in which gas is not filled, and FIG. (B) is a figure which shows the mode at the time of filling which has filled gas.

  The system of the first embodiment shown in FIG. 1 corresponds to a vehicle fuel supply system using high-pressure gas as fuel, and includes a receptacle 1, a valve body 2, a solenoid 3, a Hall IC (magnetoelectric conversion element) 4, and desorption detection. A switch 5 and an in-vehicle computer 6 are provided.

  The receptacle 1 functions as a gas filling port on the vehicle side that receives supply of fuel gas from a fuel gas supply source. The receptacle 1 is provided with a fuel gas flow path 7 at a substantially central portion thereof, and a filling nozzle 8 at the tip of the fuel gas supply source is connected to the receptacle 1, and the fuel gas is supplied from the fuel gas supply source through the filling nozzle 8. As shown in FIG. 1B, the fuel gas flows through the fuel gas flow path 7 and is supplied to the fuel gas storage section on the vehicle side.

  The valve body 2 includes a magnet 11 inside and is disposed in the fuel gas flow path 7. The valve body 2 is controlled to move in the fuel gas flow direction (left-right direction in FIG. 1) by the supply pressure of the fuel gas and the spring 9 attached to the valve body 2. The valve body 2 is in contact with an O-ring 10 provided in the fuel gas flow path 7 by a spring 9 so as to be closed with respect to the fuel gas flow path 7 and shut off the flow of the fuel gas. By separating from the O-ring 10 due to the supply pressure, the fuel gas passage 7 is opened, and the fuel gas can be circulated.

  The solenoid 3 is energized and controlled by the in-vehicle computer 6, and the valve body 2 is forcibly closed by the electromagnetic force generated during energization. In place of the valve closing operation of the valve body 2 by the solenoid 3, an electromagnetic valve is provided on the downstream side of the fuel gas flow path 7 of the receptacle 1, and fuel is generated by this electromagnetic valve under the control of the in-vehicle computer 6 when an abnormality occurs. You may make it interrupt | block the distribution | circulation of gas.

  The Hall IC 4 is provided in the vicinity of the valve body 2 and detects the change in the magnetic flux generated by the movement of the magnet 11 provided inside the valve body 2 as the valve body 2 moves, thereby opening the valve body 2. Detects valve status and valve closing status. The detection signal is sent to the in-vehicle computer 6.

  The desorption detection switch 5 is provided in the receptacle 1 and detects whether or not the filling nozzle 8 is connected to the receptacle 1. The attachment / detachment detection switch 5 is electrically connected to the in-vehicle computer 6, and when the filling nozzle is connected to the receptacle 1, it is energized (ON state), and the connection of the filling nozzle 8 to the receptacle 1 is detected on the in-vehicle computer 6 side. On the other hand, when the filling nozzle is removed from the receptacle 1, it is in a disconnected state (OFF state), and it is detected that the filling nozzle 8 is detached from the receptacle 1 on the in-vehicle computer 6 side.

  The in-vehicle computer 6 functions as a control center for controlling the system, and includes, for example, a microcomputer provided with resources such as a CPU, a storage device, and an input / output device necessary for a computer that controls various operation processes based on a program. Realized. The in-vehicle computer 6 functions as a diagnostic control means, reads the signal of the Hall IC 4 and the desorption detection switch 5 in this system, and information related to fuel gas filling between the fuel gas supply source and the vehicle side, and reads the read signal and information. In addition, based on the control logic (program) stored in advance, the system sends commands to the components of the system, and manages and manages all operations necessary for the system, including the failure diagnosis operations described below. Control.

  Information related to fuel gas filling between the fuel gas supply source and the vehicle side is shared between the fuel gas supply source, for example, the gas station and the vehicle by communication means such as an interface. These are equivalent to those set in recent fuel cell vehicles, for example.

  In such a configuration, a failure diagnosis and a countermeasure (action) when the interface function is provided between the fuel gas supply source and the vehicle and when the interface function is not provided will be described.

  In the case of a vehicle, since the ignition gas is normally turned off and fuel gas is filled, at the time of failure diagnosis, if the vehicle ignition is on, it is determined that the fuel gas is not filled and the ignition is off. It is judged that the fuel gas is filled. Alternatively, when a sensor for detecting the opening / closing of the fuel lid (open / close lid) provided at the fuel inlet on the vehicle side is attached, the fuel gas is charged based on the opening / closing of the fuel lid detected by the sensor. You may make it judge at the time of non-filling. In the case other than the vehicle, it is possible to discriminate between gas filling (non-driving) and non-filling (driving) based on whether the system to which the present invention is applied is operating. .

  FIG. 2 is a diagram showing a control flow for fault diagnosis and coping with the interface function. Referring to FIG. 2 in order from Diagnosis Example 1 on the leftmost side (Diagnosis Example 2 to Diagnosis Example 6), first, the desorption detection switch is normally operated when fuel gas is not being charged into the vehicle (non-filling time). When the in-vehicle computer 6 detects that 5 is in the ON state (energized state), the filling nozzle 8 is connected to the receptacle 1 even though the fuel gas is not filled. Diagnosis is made (Diagnosis Example 1), the solenoid 3 is energized, and the valve body 2 is forcibly closed. On the vehicle side, the start / stop state is set, and an alarm is issued with a voice or video to that effect, while the fuel gas supply source, for example, the gas station side, shares the diagnosis contents by the previous interface function to share the fuel gas. Take measures to stop supply.

  Next, at the normal time when fuel gas is not charged into the vehicle (non-filling time), the desorption detection switch 5 is in the OFF state (disconnected state), and the valve body 2 of the receptacle 1 is in the open state. If it is detected by the in-vehicle computer 6, it is diagnosed that the valve body 2 has an open fixation failure (Diagnosis Example 2), and is dealt with in the same manner as in the previous Diagnosis Example 1.

  Next, when fuel gas is not charged into the vehicle at normal time (non-filling time), the desorption detection switch 5 is in an OFF state (disconnected state), and the valve body 2 of the receptacle 1 is in a closed state. If it is detected by the in-vehicle computer 6, the fuel gas supply source, the receptacle 1 and the valve body 2 are diagnosed as being in a normal state (diagnosis example 3), and the solenoid 3 is energized to close the valve body 2. While maintaining the valve state, a normal operation mode is set on the vehicle side.

  Next, when the vehicle is filled with fuel gas, the in-vehicle computer 6 detects that the desorption detection switch 5 is in the ON state (energized state) and the valve body 2 of the receptacle 1 is in the open state. In this case, it is diagnosed that the fuel gas filling operation to the vehicle via the receptacle 1 is normally performed (diagnostic example 4), the solenoid 3 is deenergized, the valve body 2 is opened, On the vehicle side, a filling mode for performing a fuel gas filling operation is set.

  Next, when the vehicle is filled with fuel gas, the in-vehicle computer 6 detects that the desorption detection switch 5 is in the ON state (energized state) and the valve body 2 of the receptacle 1 is in the closed state. In this case, the valve body 2 is diagnosed as having a closed adhesion failure (Diagnosis Example 5), and the same measures as in Diagnosis Example 1 are taken.

  Finally, when the vehicle gas is filled in the vehicle, if the in-vehicle computer 6 detects that the desorption detection switch 5 is in the OFF state (disconnected state), the filling nozzle 8 is reliably connected to the receptacle 1. In this case, it is diagnosed that a connection failure of the filling nozzle 8 has not occurred (diagnostic example 6), and is handled in the same manner as in the first diagnostic example.

  FIG. 3 is a diagram showing a flow of fault diagnosis and countermeasure when there is no interface function described above. In FIG. 3, the features of failure diagnosis and countermeasures when there is no interface function are the features of diagnosis example 1, diagnosis example 2, diagnosis example 5 and diagnosis example 6 compared to the control flow shown in FIG. In the countermeasure (action), the fuel gas supply stop measure on the gas station side is deleted, and the rest is the same as the control flow shown in FIG.

  As described above, in the above embodiment, the connection state between the receptacle 1 and the filling nozzle 8 and the opening / closing state of the valve body 2 when the fuel gas is filled and when the fuel gas is not filled can be directly detected. As a result, it is possible to accurately perform failure diagnosis of the filling-related parts of the valve body 2 and the filling nozzle 8, and leakage of fuel gas can be prevented, and safety can be improved.

  Since the position of the valve body 2 can be grasped by the Hall IC 4, the open / close state of the valve body 2 can be grasped regardless of the moving speed of the valve body 2 as in the prior art. Further, since the Hall IC 4 can be structured so as not to contact the fuel gas fluid, it can also be applied to a high-pressure fluid, a corrosive fluid, or the like.

  Since it is possible to directly diagnose an open-fixation failure of the valve body 2 included in the receptacle 1, it is possible to detect a gas leak more quickly than a conventional gas concentration sensor, and safety is improved. . Moreover, a double safety structure can be taken by using together with a gas concentration sensor.

  In addition, although the embodiment in which the present invention is applied to a fuel supply system for a vehicle using high pressure gas as a fuel has been described, any system can be used as long as it is a system that fills a fluid gas from a supply source to a supply destination. It is possible to obtain the same effect by applying the present invention.

It is a figure which shows the structure of the gas filling fault diagnostic system which concerns on Example 1 of this invention. 3 is a control flow showing failure diagnosis and a countermeasure example in the system of the first embodiment. 6 is a control flow showing another example of failure diagnosis and countermeasures in the system of the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Receptacle 2 ... Valve body 3 ... Solenoid 4 ... Hall IC
DESCRIPTION OF SYMBOLS 5 ... Desorption detection switch 6 ... In-vehicle computer 7 ... Fuel gas flow path 8 ... Filling nozzle 9 ... Spring 10 ... O-ring 11 ... Magnet

Claims (3)

A receptacle to which a gas supply source filling nozzle is connected at the time of gas filling to receive gas supply;
It is disposed in a gas flow path provided in the receptacle, and is provided with valve opening / closing detection means for controlling the valve opening / closing state to flow / shut off the gas and detect the valve opening / closing state. A first valve body;
Desorption detection means for detecting a desorption state between the receptacle and the filling nozzle;
Based on the valve open / closed state of the first valve body detected by the valve open / close detection means and the desorption state of the filling nozzle detected by the desorption detection means And a diagnostic control means for diagnosing abnormalities in the first valve body and the filling nozzle when gas is not filled. The valve opening / closing detection means provided in the first valve body is composed of a magnet,
A change in magnetic flux due to the magnet is detected by movement of the first valve body associated with opening / closing, and a magnetoelectric conversion element constituting the valve opening / closing detection means is provided.
2. The gas filling failure diagnosis system according to claim 1, wherein the magnet and the magnetoelectric conversion element constitute a non-contact type valve opening / closing detection means. A gas flow path provided in the receptacle, and a second valve element provided downstream of the first valve element,
When the diagnosis control means detects that the first valve element is not firmly fixed, the diagnosis control means closes the second valve element to shut off the gas flow. The gas filling fault diagnosis system according to claim 1 or 2.

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