JP2007146677A - Vehicular starting determining device and vehicular starting determining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To highly accurately determine a starting mode of an engine. <P>SOLUTION: This vehicular starting determining device 1 has an opening-closing detecting means detecting opening-closing of a vehicle door for making access to an on-vehicle power source 2, and a charge-discharge detecting means detecting a charge-discharge mode in the on-vehicle power source 2. The vehicular starting determining device 1 detects an opening state by the opening-closing detecting means when starting the engine, and determines that the engine is started by electric power supplied from an external power source 11 when detecting a charge state by the charge-discharge detecting means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle start determination device that determines, for example, whether or not an engine has been jump-started.

2. Description of the Related Art Conventionally, a drive device for an engine starter that determines whether or not an engine has started (jump start) by receiving power supply from an external power source based on the opening and closing of a bonnet switch that is opened and closed in conjunction with the opening and closing of the bonnet is known. (For example, refer to Patent Document 1).
JP 2005-69101 A

  However, in the conventional driving device, since it is determined whether or not the jump start has been made based only on the opening and closing of the Bonnet switch, the engine start mode in the event of an abnormality such as when the switch is stuck May not be able to be judged appropriately.

  The present invention has been made to solve such problems, and has as its main object to determine the engine start mode with high accuracy.

In order to achieve the above object, one embodiment of the present invention provides:
Open / close detection means for detecting opening / closing of the vehicle door for accessing the in-vehicle power supply,
A vehicle start determination device comprising: charge / discharge detection means for detecting a charge / discharge mode in the in-vehicle power supply;
When the engine is started, when the open state is detected by the open / close detection unit and the charge state is detected by the charge / discharge detection unit, it is determined that the engine has been started by electric power supplied from an external power source. This is a vehicle start determination device.

  According to this aspect, when the engine is started, when the open state is detected by the open / close detection means and the charge state is detected by the charge / discharge detection means, the engine is started by the electric power supplied from the external power source. Determine that it was done. As a result, an engine start mode such as a jump start in which power is supplied from an external power source and the engine is started can be determined with high accuracy.

  In this aspect, the opening / closing detection means is, for example, a switch that is disposed on the vehicle door and interlocks with the opening / closing of the vehicle door.

  Furthermore, in this one aspect, the charge / discharge detection means is, for example, a current sensor or a voltage sensor provided in the in-vehicle power supply.

Note that one embodiment of the present invention for achieving the above object is as follows.
An opening / closing detection step for detecting opening / closing of a vehicle door for accessing an in-vehicle power supply;
A charge / discharge detection step for detecting a charge / discharge mode in the in-vehicle power supply;
When the engine is started, an open state is detected by the open / close detection step, and when a charge state is detected by the charge / discharge detection step, it is determined that the engine has been started by electric power supplied from an external power source. A start determination step to perform,
The start determination method of the vehicle characterized by including these may be sufficient.

  According to the present invention, the engine starting mode can be determined with high accuracy.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings. The basic concept, main hardware configuration, operating principle, basic control method, and the like of the starter for a vehicle are known to those skilled in the art, and thus detailed description thereof is omitted.

  FIG. 1 is a block diagram showing an outline of a system configuration of a vehicle start determination device according to an embodiment of the present invention. The vehicle start determination device 1 according to this embodiment includes an in-vehicle power supply 2 that is housed in an engine room 20 of a vehicle and supplies electric power to the vehicle equipment (FIG. 2). As the in-vehicle power source 2, for example, a rechargeable 12V or 24V lead battery is used.

  The engine room 20 is provided with a vehicle door such as a bonnet 21 that covers the upper surface of the engine room 20 and can be opened and closed. Therefore, the user can freely access vehicle equipment such as the in-vehicle power source 2 and the engine housed in the engine room 20 by opening the hood 21.

  In addition, on the contact surface between the engine room 20 and the bonnet 21, an open / close switch 3 that switches to an off state or an off state in conjunction with opening / closing of the bonnet 21 is disposed. For example, the opening / closing switch 3 outputs an off signal to the power supply ECU 7 described later when the bonnet 21 is opened. On the other hand, when the hood 21 is closed, the open / close switch 3 transmits an ON signal to the power supply ECU 7 described later. As the open / close switch 3, a switch that is mechanically or electrically switched to an off state or an on state is used.

  The engine room 20 mainly stores an engine for driving the vehicle. An electric starter motor 4 for starting the engine is connected to the crankshaft of the engine via a transmission mechanism including a belt. The starter motor 4 is connected to the in-vehicle power source 2 through the starter switch 5 and is driven by receiving power supply from the in-vehicle power source 2. The starter switch 5 is constituted by, for example, an electromagnetic relay having a relay coil 5a and a relay contact 5b.

  The relay contact 5b is held in an open state (off state) when the relay coil 5a is in a non-excited state (non-conductive state), and is closed (on state) when the relay coil 5a is in an excited state (energized state). Retained. Therefore, when the relay coil 5a is energized and the relay contact 5b is kept closed, power is supplied from the in-vehicle power source 2 to the starter motor 4, and the starter motor 4 is driven.

  Between the starter motor 4 and the in-vehicle power source 2, a current sensor 6 for detecting a current output from the in-vehicle power source 2 is disposed.

  A power supply ECU (Electronic Control Unit) 7 that controls the vehicle power supply is connected to the current sensor 6, the starter switch 5, and the open / close switch 3.

  The power supply ECU 7 is composed of a microcomputer, executes various processes according to a program, and controls a CPU (Central Processing Unit) 7a for controlling each part of the apparatus, and a ROM (Read Only) for storing an execution program of the CPU 7a. Memory 7b, a readable / writable RAM (Random Access Memory) 7c for storing calculation results, a timer, a counter, an input / output interface (I / O) 7d, and the like. The CPU 7a, ROM 7b, RAM 7c, and input / output interface 7d are connected to each other via a data bus 7e and transmit / receive data to / from each other.

  An engine ECU 8 that comprehensively controls engine start, output, and the like is connected to the power supply ECU 7 via a vehicle LAN (Local Area Network) 9. The vehicle LAN 9 is composed of, for example, a multiplex communication bus or the like, and performs bidirectional data communication based on a CAN (Controller Area Network) protocol.

  For example, when the vehicle key is inserted into the key cylinder and the key cylinder is rotated to the start position, the engine ECU 8 turns on the key cylinder switch 10 incorporated in the key cylinder, and outputs an on signal to the engine ECU. To do. The engine ECU 8 determines that an engine start request has been made based on the ON signal. If the engine ECU 8 determines that the engine start request has been made and satisfies a predetermined start condition, the engine ECU 8 transmits a start request signal to the power supply ECU 7 via the vehicle LAN 9.

  When the power supply ECU 7 receives the start request signal from the engine ECU 8, the power supply ECU 7 energizes the relay coil 5a of the starter switch 5 based on the start request signal. When the relay coil 5a is energized, the relay contact 5b is kept closed, power is supplied from the in-vehicle power source 2 to the starter motor 4, the starter motor 4 is driven, and engine start (cranking) is started. At this time, the in-vehicle power supply 2 is in a discharged state, and current flows in the X1 direction in the current sensor 6.

  On the other hand, when an external power source 11 is connected to the in-vehicle power source 2 and power is supplied from the external power source 11 to the in-vehicle power source 2 (at the time of jump start), power is supplied to the in-vehicle power source 2 by a generator connected to and driven by the engine. When the in-vehicle power supply 2 is in a charged state, such as when the current is supplied, current flows in the X2 direction in the current sensor 6. Here, the external power source 11 refers to any external power source that can access the host vehicle from the outside, such as a battery mounted on another vehicle.

  As described above, the power supply ECU 7 determines whether the in-vehicle power supply 2 is in a charged state or a discharged state based on the polarity (X1 direction or X2 direction) of the current detected by the current sensor 6. . In FIG. 1, when the current flows in the X1 direction, the in-vehicle power supply 2 is in a discharged state. On the other hand, when the current flows in the X2 direction, the in-vehicle power supply 2 is in a charged state.

  By the way, for example, when the charge amount of the in-vehicle power source 2 is insufficient, the external power source 11 is connected in parallel to the in-vehicle power source 2 of the host vehicle, and power is supplied from the external power source 11 to the starter motor 4. Thus, a jump start for starting the engine may be performed. At this time, since the in-vehicle power source 2 and the external power source 11 are connected by the wiring 11a such as a booster cable (FIG. 2), the hood 21 of the vehicle is opened, and the open / close switch 3 outputs an off signal to the power source ECU 7. To do.

  For this reason, conventionally, when the power supply ECU receives a start request signal from the engine ECU and receives an off signal from the open / close switch, it determines that a jump start has been made. When such a determination is made, even when the switch is abnormal, such as when the open / close switch is stuck in an off state, or when the bonnet 21 is a half door, the power supply ECU does not jump even when a normal start is performed. There is a risk of misjudging that the start has been made.

  Therefore, the vehicle start determination device 1 according to the present embodiment determines with high accuracy whether or not the engine has been jump-started based on the output signal from the open / close switch 3 and the current value from the current sensor 6. Yes.

  That is, the power supply ECU 7 determines whether the in-vehicle power supply 2 is in a charged state based on the current value (polarity) of the in-vehicle power supply 2 detected by the current sensor 6 in addition to the determination on the output signal from the open / close switch 3. Judge whether it is in a discharged state.

  When the power supply ECU 7 determines that the power is supplied from the external power supply 11 to the in-vehicle power supply 2 and the in-vehicle power supply 2 is in a charged state, the power supply ECU 7 determines that the jump start is driven by the power supplied from the external power supply 11 to the starter motor 4. To do. As a result, the power supply ECU 7 does not erroneously determine that a jump start has been made even when the switch is abnormal, such as when the opening / closing switch 3 is stuck in the off state, or when the hood 21 is a half door.

  Next, the flow of the above-described jump start determination process performed by the vehicle start determination device 1 according to the present embodiment will be described.

  FIG. 3 is a flowchart illustrating an example of a determination process flow of the vehicle start determination device 1 according to the present embodiment.

  First, when the vehicle key is inserted into the key cylinder, the key cylinder is rotated to the start position, the key cylinder switch 10 is turned on, and an on signal is transmitted to the engine ECU 8.

  Based on the ON signal, the engine ECU 8 transmits a start request signal to the power supply ECU 7 via the vehicle LAN 9. When receiving the start request signal, the power supply ECU 7 closes the relay contact 5b of the starter switch 5. As a result, electric power is supplied to the starter motor 4, the starter motor 4 starts driving, and the engine is started by rotating the crankshaft of the engine (S100).

  At this time, the power supply ECU 7 receives the OFF signal from the open / close switch 3 and determines whether or not the hood 21 is in the open state (S110).

  When the power supply ECU 7 receives the off signal from the open / close switch 3 and determines that the bonnet 21 is in the open state (Yes in S110), the in-vehicle power supply 2 is based on the polarity of the current detected by the current sensor 6. It is determined whether the battery is charged or discharged (S120).

  On the other hand, when the power supply ECU 7 receives the ON signal from the open / close switch 3 and determines that the bonnet 21 is closed (No in S110), the power supply ECU 7 determines that the engine is not started due to a jump start and is a normal start (S130). .

  When the power supply ECU 7 determines that the in-vehicle power supply 2 is in a charged state based on the polarity of the current detected by the current sensor 6 (Yes in S120), the power supply ECU 7 determines that the engine has been started by a jump start (S140).

  On the other hand, when the power supply ECU 7 determines that the in-vehicle power supply 2 is in a discharged state based on the polarity of the current detected by the current sensor 6 (No in S120), the engine is not started due to a jump start. It is determined that the engine has started (S130).

  As described above, in the vehicle start determination device 1 according to the present embodiment, when the power supply ECU 7 determines that the hood 21 is in the open state and determines that the in-vehicle power supply 2 is in the charged state, the engine is jump-started. to decide. As a result, the power supply ECU 7 does not erroneously determine that a jump start has been made even when the switch is abnormal, such as when the opening / closing switch 3 is stuck in an off state, or when the hood 21 is a half door. That is, the power supply ECU 7 can determine the engine start mode such as jump start with higher accuracy.

  The power supply ECU 7 can accurately determine the state (current, voltage, temperature change) of the in-vehicle power source 2 according to the start mode by accurately determining the start mode of the engine such as jump start. It becomes possible to accurately estimate the deterioration state of the power source 2 and the like. Therefore, the power supply ECU 7 performs more accurate notification of the deterioration of the in-vehicle power source 2 to the user based on the estimated deterioration state of the in-vehicle power source 2 and the load suppression control of the vehicle device when the in-vehicle power source 2 is deteriorated with higher accuracy. Can be done.

  As mentioned above, although the best mode for carrying out the present invention has been described using one embodiment, the present invention is not limited to such one embodiment, and within the scope not departing from the gist of the present invention, Various modifications and substitutions can be made to the above-described embodiment.

  For example, in the above-described embodiment, the in-vehicle power source 2 is stored in the engine room 20, but the in-vehicle power source 2 may be stored in the trunk room. In this case, the open / close switch 3 is turned on or off in conjunction with opening / closing of the trunk door covering the trunk room.

  In (S120) of the above embodiment, the power supply ECU 7 determines whether the in-vehicle power supply 2 is in a charged state or a discharged state based on the polarity of the current detected by the current sensor 6. Based on the voltage of the in-vehicle power supply 2 detected by the voltage sensor, it may be determined whether the battery is in a charging state or a discharging state.

  In the above embodiment, the power supply ECU 7 determines the time during which the in-vehicle power source 2 is not used (the time for which the in-vehicle power source 2 is not used), the usage time of the in-vehicle power source 2 and the like based on the output signal (ON signal, etc.) from the IG (ignition) switch. It may be calculated and the deterioration state (deterioration level) of the in-vehicle power supply 2 may be estimated. Further, the power supply ECU 7 may estimate the deterioration level of the in-vehicle power supply 2 based on the current value, voltage value, temperature, etc. of the in-vehicle power supply 2 immediately before the IG switch is turned off. The power supply ECU 7 may determine whether or not the jump start has been made based on the estimated deterioration level of the in-vehicle power supply 2. For example, the power supply ECU 7 may determine that a jump start has been made when the deterioration level of the in-vehicle power supply 2 is greater than or equal to a predetermined value, and combines the output signal from the open / close switch and the current value from the current sensor. You may judge.

  The present invention can be used, for example, in a vehicle start determination device that determines whether or not a vehicle engine has been jump-started. The appearance, weight, size, running performance, etc. of the vehicle to be mounted are not limited.

It is a block diagram which shows the outline of the system configuration | structure of the vehicle starting determination apparatus which concerns on one Example of this invention. It is a figure which shows an example of the state by which the vehicle-mounted power supply in an engine room and the external power supply were connected. It is a flowchart which shows an example of the judgment processing flow of the vehicle starting determination apparatus which concerns on a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Start determination apparatus for vehicles 2 Car power supply 3 Open / close switch 4 Starter motor 5 Starter switch 6 Current sensor 7 Power supply ECU
11 External power supply

Claims (4)

Open / close detection means for detecting opening / closing of the vehicle door for accessing the in-vehicle power supply,
A vehicle start determination device comprising: charge / discharge detection means for detecting a charge / discharge mode in the in-vehicle power supply;
When the engine is started, when the open state is detected by the open / close detection unit and the charge state is detected by the charge / discharge detection unit, it is determined that the engine has been started by electric power supplied from an external power source. A vehicle start determination device. The vehicle start determination device according to claim 1,
The vehicle start determination device, wherein the opening / closing detection means is a switch disposed on the vehicle door and interlocked with the opening / closing of the vehicle door. The vehicle start determination device according to claim 1,
The vehicle start determination device, wherein the charge / discharge detection means is a current sensor or a voltage sensor disposed in the in-vehicle power source. An open / close detection step for detecting opening / closing of a vehicle door for accessing an in-vehicle power supply;
A charge / discharge detection step for detecting a charge / discharge mode in the in-vehicle power supply;
When the engine is started, an open state is detected by the open / close detection step, and when a charge state is detected by the charge / discharge detection step, it is determined that the engine has been started by electric power supplied from an external power source. A start determination step to perform,
A start determination method for a vehicle, comprising:

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