JP2018123723A - Device for starting vehicle - Google Patents

Abstract

An object of the present invention is to prevent a startability of an engine from deteriorating in a vehicle starter and to protect a starter for starting the engine. The starting means 14 has a failure of the starting section 13 based on the integrated value of the current detected by the current detecting means 15 until the start of the engine 3 is completed after a predetermined starting condition is established. When it is determined that the engine 3 is started, the engine 3 is stopped. [Selection] Figure 1

Description

  The present invention relates to a vehicle starter, and more particularly to a vehicle starter that automatically starts (restarts) an engine when a predetermined start condition is satisfied.

Conventionally, in a vehicle equipped with a so-called idle stop system that automatically stops the engine when a predetermined stop condition is satisfied, the engine is automatically started when the predetermined start condition is satisfied after the idle stop. (Restart).
In a manual transmission vehicle (MT vehicle), the engine is automatically started by restarting the engine depending on whether the driver depresses the clutch pedal and whether the transmission is in the neutral position. The fuel consumption is reduced by increasing the stop frequency. In this case, since the clutch pedal is depressed by the driver, when the depression of the clutch pedal is interrupted during the restart of the engine, the load on the starter (starting unit) increases.
In order to solve such a problem, Patent Document 1 has a configuration in which restart of the engine is interrupted when the driving force of the starter is transmitted to the driving system of the vehicle as a vehicle control device. It is disclosed.

JP 2004-92453 A

  However, in Patent Document 1 described above, when the engine speed becomes close to a predetermined speed that can be determined as a complete explosion state of the engine by restarting the engine, the starter continues to be driven, and the burden on the starter is not so great. Even in the state, the restart of the engine is interrupted, so that the restartability of the engine is deteriorated.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle starting device that can prevent deterioration of restartability when the engine is restarted and that can protect a starting portion that starts the engine.

  The present invention provides a vehicle starter comprising: a starter that starts the engine; a starter that drives the starter when a predetermined start condition is satisfied; and a battery that supplies power to the starter. Current detecting means for detecting a current flowing from the battery to the starting portion; and the starting means is the current detecting means until the start of the engine is completed after the predetermined starting condition is satisfied. The engine start is stopped when it is determined that the starting unit is out of order based on the detected integrated current value.

  In the present invention, the engine start is stopped when it is determined that the start unit has failed based on the integrated value of the current from when the predetermined start condition is satisfied until the start of the engine is completed. In addition, it is possible to prevent the restartability from being deteriorated when the engine is restarted, and to protect the starting unit that starts the engine.

FIG. 1 is a schematic plan view of a vehicle. (Example) FIG. 2 is a flowchart of start control. (Example)

  The purpose of this invention is to prevent the deterioration of restartability at the time of engine restart and to protect the starter for starting the engine, until the start of the engine is completed after a predetermined start condition is satisfied. When it is determined that the starting unit is out of order based on the integrated value of the current, the engine is stopped and realized.

1 and 2 show an embodiment of the present invention.
As shown in FIG. 1, an engine 3 and a transmission 4 as a power torrent 2 for traveling the vehicle 1 are mounted on the vehicle 1, and driving wheels 6 are connected to the transmission 4 via a power transmission mechanism 5.・ 6 is provided.
The transmission 4 includes a manual transmission (MT) and the like, and includes a clutch 7 with the engine 3. The clutch 7 is operated by a depression operation of the clutch pedal 8 by the driver.
The power transmission mechanism 5 is a mechanical transmission structure, and includes a propeller shaft 9 and a wheel shaft 10.

The vehicle 1 is equipped with a starter 11.
The starter 11 includes a battery 12, a starter 13, a starter 14, and a current detector 15.
The battery 12 is made of, for example, a lead battery and can be not only one but also two such as a main battery and a sub battery.
The starter 13 is made of a generator with a motor function, for example, and is disposed adjacent to the engine 3. The generator with a motor function as the starting unit 13 performs power assist of the engine 3 when the vehicle 1 starts or accelerates, and when the vehicle 1 decelerates, changes the deceleration energy into electricity and stores it in the battery 12 to store the fuel. It is intended to reduce consumption.
The starting unit 14 includes, for example, an engine electronic control unit (ECU), and is connected to the starting unit 13 via the first signal line 16 and outputs a command signal to the starting unit 13.
The starter 14 includes an idle stop system function unit 14A, and inputs a start request signal, an engine speed signal, etc., and automatically drives the engine 3 by driving the starter 13 when a predetermined start condition is satisfied. Start.
Further, the battery 12 is connected to the starting means 14 via the first power line 17. The battery 12 supplies power from the first power line 17 to the starting means 14. In the middle of the first power line 17, a second power line 18 connected to the current detection means 15 is connected.
The current detection unit 15 includes a current sensor and the like, and detects a current flowing from the battery 12 to the starting unit 13. The current detection means 15 is connected to the start means 14 by the second signal line 19 and outputs the detected current signal to the start means 14.

In this embodiment, the starter 14 is configured so that the starter 13 is based on the integrated value of the current detected by the current detector 15 until the start of the engine 3 is completed after a predetermined start condition is established. When it is determined that a failure has occurred, the engine 3 is stopped.
Further, the starting means 14 determines that the integrated value of the current detected by the current detecting means 15 from when a predetermined starting condition is satisfied until the start of the engine 3 is completed, is that the starting portion 13 fails. When the specified value is exceeded (when overcurrent is detected), the engine 3 is stopped. Here, the integrated value of the current is performed after the restart request of the starter 13 is established and the starter 13 can be restarted until the restart is completed or interrupted. The specified value is a parameter set in advance for each vehicle.

Next, the start control of this embodiment will be described along the flowchart of FIG.
As shown in FIG. 2, when the program is started in the starter 14 (step A01), it is first determined whether or not a predetermined start condition is satisfied (step A02).
If step A02 is YES and a predetermined start condition is satisfied, the engine 3 is started (restarted) (step A03).
Then, the integrated value of the current detected by the current detection means 15 is calculated (step A04).
Thereafter, it is determined whether or not the integrated value of the current exceeds a specified value (current integrated value> specified value) (step A05). That is, in step A05, it is determined whether or not the starting unit 13 is out of order.
If step A05 is YES and the integrated value of the current exceeds the specified value and it is determined that the starter 13 is out of order, the start of the engine 3 is stopped (step A06).
On the other hand, if step A05 is NO and the integrated current value is less than the specified value and it is not determined that the starter 13 has failed, it is determined whether or not the start of the engine 3 has been completed (engine complete explosion state). Is determined (step A07).
If step A07 is NO and the engine 3 has not been started, the process returns to step A04.
If step A07 is YES and the engine 3 has been started, the program is returned (step A08).
If step A02 is NO and a predetermined start condition is not satisfied, or if start of the engine 3 is stopped in step A06, the program is returned (step A08).
After returning the program in step A08, the routine shifts to normal control.

As a result, in this embodiment, the starting unit 14 starts based on the integrated value of the current detected by the current detecting unit 15 until the start of the engine 3 is completed after a predetermined starting condition is satisfied. When it is determined that the unit 13 is out of order, the engine 3 is stopped. As a result, it is possible to prevent the restartability from deteriorating when the engine 3 is restarted and to protect the starter 13. In addition, the wiring between the battery 12 and the starter 13 can be protected.
Further, the starting means 14 determines that the integrated value of the current detected by the current detecting means 15 from when a predetermined starting condition is satisfied until the start of the engine 3 is completed, is that the starting portion 13 fails. When the specified value is exceeded, the engine 3 is stopped. Thereby, the starting part 13 can be protected. In addition, the wiring between the battery 12 and the starter 13 can be protected.

The start control according to this embodiment will be specifically described as follows.
The starter 14 stops the engine 3 when a predetermined stop condition is satisfied when the vehicle 1 is stopped, and is determined by a start request, an engine speed, and the like when a predetermined start condition is satisfied while the engine 3 is stopped. A restart torque is commanded to the starter 13.
The starter 13 restarts the engine 3 by generating torque based on the restart torque commanded from the starter 14. At this time, power from the battery 12 is supplied to the starter 13.
With respect to the setting of the restart torque in the starter 14, the setting is made smaller as the current engine speed approaches the target engine speed when the engine 3 is started (during restart), and control is performed so that overshoot does not occur. Is done.
Then, the starter 14 stops the restart of the starter 13 when the restart of the engine 3 is completed based on the engine speed or the like (when the complete explosion of the engine is established).
However, in the vehicle 1 equipped with the manual transmission (MT), the clutch 7 is operated by the driver's depressing operation of the clutch pedal 8, so that the clutch meet is performed during the restart of the starter 13. There is.
If the clutch meet is performed while the starter 13 is restarted, the engine 3 is restarted in a state where the engine 3 and the drive wheel 6 are connected (in a state where the clutch is not engaged and the clutch pedal 8 is not depressed). For this reason, the load from the engine 3 to the drive wheel 6 cannot be lifted by the drive of the starting part 13, and there exists a possibility that engine stall may arise.
When the half clutch state is maintained while the starter 13 is being driven, the starter 13 increases the engine speed to the target engine speed. For this reason, since the starting part 13 continues to give a high starting torque, an overcurrent flows from the battery 12 which supplies electric power. In addition, the starter 13 may be in a locked state (a state where the engine 3 is not driven despite the engine 3 being restarted). In this case, if the brake pedal is depressed, the engine 3 cannot be driven by the starter 13 and a lock current is generated. Accordingly, a current larger than the current at the time of normal starting flows to the starting unit 13 for a long time, and the starting unit 13 may be damaged.
In order to solve this problem, in this embodiment, even if clutch meet is performed during restart of the starter 13, the current flowing from the battery 12 to the starter 13 is an allowable specified value of the starter 13. As long as there is, restart of the starter 13 is continued. On the other hand, when the current flowing from the battery 12 to the starter 13 exceeds a specified value, the restart of the starter 13 is stopped and the engine 3 is stopped. As a result, the restartability of the engine 3 can be prevented from deteriorating and the starter 13 can be protected. In addition, the wiring between the battery 12 and the starter 13 can be protected.

  The starting device of the present invention can be applied to various vehicles.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Powertrain 3 Engine 4 Transmission 5 Power transmission mechanism 6 Drive wheel 7 Clutch 8 Clutch pedal 9 Propeller shaft 10 Wheel shaft 11 Starter 12 Battery 13 Starter (generator with motor function)
Reference Signs List 14 start means 15 current detection means 16 first signal line 17 first power line 18 second power line 19 second signal line

Claims (2)

  In a vehicle starter comprising: a start unit that starts an engine; a start unit that drives the start unit when a predetermined start condition is satisfied; and a battery that supplies power to the start unit. Current detecting means for detecting a current flowing to the starting portion; and the starting means detects the current detected by the current detecting means during the period from when the predetermined starting condition is satisfied until the start of the engine is completed. A starter for a vehicle, wherein when the starter is determined to be out of order based on the integrated value, the start of the engine is stopped.   The starting means is defined such that an integrated value of the current detected by the current detecting means from when the predetermined starting condition is satisfied to when the starting of the engine is completed is determined that the starting unit is out of order. A starter for a vehicle, wherein when the value is exceeded, the start of the engine is stopped.

Images