JP2016061254A - Starter protection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a starter protection device which can prevent a failure of a starter caused by an excess current due to a tire lock state.SOLUTION: A starter protection device 100 includes a starter stop part 103 which stops a starter 102 for activating an engine 101 of an automobile, and a mode switch part 104 which switches between a normal mode which, in the activation of the starter 102, permits the starter stop part 103 to stop the starter 102, and an emergency escape mode which prohibits the starter stop part 103 from stopping the starter 102. The mode switch part 104 switches to the normal mode in a tire lock state. The starter stop part 103 stops the starter 102 when the current mode is not the emergency escape mode, and an integrated value of a cam pulse signal or a crank pulse signal in the engine 101 is equal to or less than a threshold value.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a starter protection device for protecting a starter for starting an automobile engine.

  Conventionally, in the event of an emergency such as when the engine stops at a railroad crossing and cannot be restarted, the driver drives the starter under a predetermined condition to start the vehicle urgently. A technique capable of achieving escape is known (see, for example, Patent Document 1).

JP2013-024216A

  However, if the starter is continuously driven in the gear-in state and the tire locked state, a large current continues to be applied to the starter.

  Therefore, an object of the present invention is to provide a starter protection device capable of preventing a starter failure caused by an overcurrent associated with a tire lock state.

  The present invention devised to achieve this object includes a starter stop unit that stops a starter for starting an automobile engine, and a normal mode that allows the starter stop unit to stop when the starter is driven. And a mode switching unit that switches between an emergency exit mode that prohibits the starter from being stopped by the starter stopping unit, and the mode switching unit switches to a normal mode when the tire is locked, and stops the starter. The starter protection device stops the starter when the current mode is not the emergency escape mode and the integrated value of the cam pulse signal or the crank pulse signal in the engine is equal to or less than a threshold value.

  The starter stop unit stops the starter when the current mode is not the emergency escape mode, the integrated value of the cam pulse signal or the crank pulse signal in the engine is not less than the threshold value, and the cranking is continued for a predetermined time. It is preferable to stop.

  In the starter stop unit, the current mode is not the emergency escape mode, the integrated value of the cam pulse signal or the crank pulse signal in the engine is not less than the threshold value, and the cranking is not continued for a predetermined time. The starter is preferably stopped when it is started.

  Preferably, the mode switching unit determines that the tire is locked when the parking brake or the foot brake is applied.

  Preferably, the mode switching unit switches to the emergency escape mode when the current mode is not the emergency escape mode but the gear-in state, not the tire lock state.

  It is preferable that the mode switching unit suspends the mode switching when the current mode is not the emergency escape mode and the gear-in state is not the tire lock state.

  Preferably, the mode switching unit maintains the emergency escape mode when the current mode is the emergency escape mode instead of the tire lock state.

  ADVANTAGE OF THE INVENTION According to this invention, the starter protection apparatus which can prevent the failure of the starter resulting from the overcurrent accompanying a tire lock state can be provided.

It is the schematic which shows the starter protection apparatus which concerns on embodiment of this invention. It is a flowchart which shows the whole operation | movement of a starter protection device. It is a flowchart which shows operation | movement of a mode switching part.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, a starter protection device 100 according to a preferred embodiment of the present invention includes a starter stop unit 103 that stops a starter 102 for starting an automobile engine 101, and a starter stop when the starter 102 is driven. A mode switching unit 104 that switches between a normal mode that allows the starter 102 to be stopped by the unit 103 and an emergency exit mode that prohibits the starter 102 from being stopped by the starter stopping unit 103.

  The starter stop unit 103 and the mode switching unit 104 are realized by an electronic control unit (ECU) 105, and the electronic control unit 105 acquires various parameters used by the starter protection device 100.

  As shown in FIG. 2, the starter protection device 100 starts operating when the ignition key is turned to the starter driving position by the driver and the starter 102 is driven, and the mode is switched by the mode switching unit 104 in step S101. .

  When the operation of the starter protection device 100 is started for the first time, the current mode is the normal mode, that is, the emergency escape mode is disabled. In step S101, the emergency escape mode is enabled and the current mode is emergency exited. It is determined whether to enter the mode, or keep the emergency escape mode disabled and keep the current mode in the normal mode.

  As shown in FIG. 3, the mode switching unit 104 determines whether or not the tire is locked in steps S201 and S202. If the tire is in the tire locked state, the mode switching unit 104 proceeds to step S203 and changes the current mode to the normal mode. Step S101 is completed and the process proceeds to Step S102. If the tire is not locked, the process proceeds to Step S204. Specifically, it is determined whether or not the parking brake is effective in step S201, and it is determined whether or not the foot brake is effective in step S202. If the parking brake or the foot brake is effective, the tire is locked. Judge that there is.

  The reason why the current mode is switched to the normal mode when the tire is locked is that there is a possibility that the driver does not intend to escape urgently, and there is a concern that the starter 102 may be broken, so the starter 102 needs to be protected. This is because it is assumed. For example, a case where the driver is operating a car with the intention of gear-in parking can be considered.

  In step S204, it is determined whether or not the current mode is the emergency escape mode. If the current mode is not the emergency escape mode (that is, the normal mode), the process proceeds to step S205, and the current mode is emergency. If it is the escape mode, the process proceeds to step S206 to maintain the current mode in the emergency escape mode, and step S101 is terminated and the process proceeds to step S102.

  In step S205, it is determined whether or not the gear is in the gear-in state. If the gear is in the state, the process proceeds to step S206 to switch the current mode to the emergency exit mode. End the operation.

  The reason why the current mode is switched to the emergency escape mode when the current mode is not the emergency escape mode and the gear-in state is not the tire lock state, because the driver has the intention of emergency escape and the starter stop unit 103 This is because it is necessary to prohibit the stop of 102.

  In addition, when the current mode is not the emergency escape mode and the gear-in state is not in the tire lock state, the reason for terminating the operation after holding the mode switching is that the driver has no intention of emergency exit, and the starter 102 This is because the starter 102 needs to be protected.

  Further, when the current mode is the emergency escape mode, not the tire lock state, the reason for maintaining the current mode in the emergency escape mode regardless of the gear-in state is that even if the clutch is disconnected during the emergency exit, This is because it is necessary to prohibit the starter 102 from being stopped by the starter stop unit 103 since the clutch may be intentionally disconnected by the driver.

  Referring to FIG. 2 again, in step S102, the starter stop unit 103 determines whether or not the current mode is the emergency escape mode. If the current mode is the emergency escape mode, the starter 102 is not stopped. When the current mode is not the emergency escape mode (that is, the normal mode), the operation is shifted to the normal control (starter stop control) from step S103 to step S106.

  The reason why the operation is terminated without stopping the starter 102 when the current mode is the emergency escape mode is that the emergency escape of the automobile needs to be prioritized over the protection of the starter 102 in an emergency.

  In step S103, the starter stop unit 103 determines whether the integrated value of the cam pulse signal or crank pulse signal in the engine 101 is equal to or less than a threshold value, and the integrated value of the cam pulse signal or crank pulse signal in the engine 101 is not equal to or less than the threshold value. In step S104, if the integrated value of the cam pulse signal or crank pulse signal in the engine 101 is equal to or less than the threshold value, the process proceeds to step S106 and the starter stop unit 103 stops the starter 102.

  The reason why the starter stop unit 103 stops the starter 102 when the integrated value of the cam pulse signal or crank pulse signal in the engine 101 is equal to or less than the threshold value is that there is no intention of emergency escape by the driver, and there is a concern that the starter 102 may fail. Therefore, it is necessary to protect the starter 102. For example, a case where the driver is operating a car with the intention of gear-in parking can be considered.

  In addition, the reason why the normal control is continued when the integrated value of the cam pulse signal or the crank pulse signal in the engine 101 is not less than the threshold value is intentional by the driver for the operation of the automobile, although the driver intends to escape urgently. Since the parking brake may be pulled weakly or the foot brake may be stepped weakly, it is necessary to prohibit the starter 102 from stopping even in the emergency escape mode when the tire is not completely locked This is because there are cases.

  In step S104, the starter stop unit 103 determines whether or not cranking is continued for a predetermined time. If cranking is not continued for a predetermined time, the process proceeds to step S105, and cranking is performed for a predetermined time. When the ranking is continued, the process proceeds to step S106 and the starter stop unit 103 stops the starter 102.

  The reason why the starter 102 is stopped by the starter stop unit 103 when the cranking is continued for a predetermined time is that the engine 101 is unlikely to be started even if the starter 102 is further driven. This is because the starter 102 needs to be protected. For example, there may be a case where the automobile is unable to travel due to a failure of the engine 101 or the like.

  In step S105, it is determined whether or not the engine 101 is started by the starter stop unit 103. When the engine 101 is started, the process proceeds to step S106 and the starter stop unit 103 stops the starter 102, and the engine 101 If the starter 102 is not started, the operation is terminated without stopping the starter 102.

  The reason for stopping the starter 102 by the starter stop unit 103 when the engine 101 is started is that it is no longer necessary to continue driving the starter 102, and the starter 102 is stopped when the engine 101 is not started. The reason for terminating the operation without causing the engine 101 is that the engine 101 may be started by further continuing the driving of the starter 102.

  As described above, according to the present invention, it is possible to provide a starter protection device capable of preventing a starter failure caused by an overcurrent associated with a tire lock state.

DESCRIPTION OF SYMBOLS 100 Starter protective device 101 Engine 102 Starter 103 Starter stop part 104 Mode switching part 105 Electronic controller

Claims (7)

A starter stop unit for stopping a starter for starting an automobile engine;
A mode switching unit that switches between a normal mode in which the starter stop unit is allowed to stop when the starter is driven and an emergency exit mode in which the starter stop unit is prohibited from stopping the starter;
With
The mode switching unit switches to the normal mode when the tire is locked,
The starter stop unit stops the starter when a current mode is not an emergency escape mode and an integrated value of a cam pulse signal or a crank pulse signal in the engine is equal to or less than a threshold value.   The starter stop unit stops the starter when the current mode is not the emergency escape mode, the integrated value of the cam pulse signal or the crank pulse signal in the engine is not less than the threshold value, and the cranking is continued for a predetermined time. The starter protection device according to claim 1 to be stopped.   In the starter stop unit, the current mode is not the emergency escape mode, the integrated value of the cam pulse signal or the crank pulse signal in the engine is not less than the threshold value, and the cranking is not continued for a predetermined time. The starter protection device according to claim 1, wherein the starter is stopped when the starter is started.   The starter protection device according to any one of claims 1 to 3, wherein the mode switching unit determines that the tire is locked when a parking brake or a foot brake is applied.   The starter protection device according to any one of claims 1 to 4, wherein the mode switching unit switches to an emergency escape mode when the current mode is not an emergency escape mode but a gear-in state, not in a tire lock state.   The starter protection device according to any one of claims 1 to 5, wherein the mode switching unit suspends the mode switching when the current mode is not the emergency escape mode and the gear-in state is not in a tire locked state.   The starter protection device according to any one of claims 1 to 6, wherein the mode switching unit maintains the emergency escape mode when the current mode is the emergency escape mode instead of the tire lock state.

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