JP2023084019A - Starter for vehicle - Google Patents

Abstract

To reduce costs of a vehicle.SOLUTION: A vehicle 500 comprises: an engine control device 100 for controlling an internal combustion engine 10; a starter motor 15 for starting the engine; a shift lever mechanism 20 having a shift lever for selecting a shift range of an automatic transmission; and a shift position sensor 34 for outputting a shift position signal corresponding to a shift position representing an operation position of the shift lever. The control device 100 acquires a start request signal indicating that there is a request for starting the internal combustion engine 10 given by a vehicle driver and the shift position signal. Then, if the acquired shift position signal is a signal indicating a predefined shift position, the control device performs processing to output a permission signal for permitting driving of the starter motor 15.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle starting device.

For example, the vehicle described in Patent Document 1 includes a starter motor for starting the engine, and a shift position sensor that outputs a shift position signal corresponding to the shift position, which is the operation position of the shift lever that selects the shift range of the automatic transmission. It has This vehicle also has an SBW-ECU equipped with a microcomputer, and the SBW-ECU acquires the signal of the shift position sensor. When the shift position signal input to the SBW-ECU indicates that the automatic transmission is in a non-power transmission state, the starting ECU permits the starter motor to be driven.

JP 2017-31926 A

In the vehicle, the SBW-ECU acquires the signal of the shift position sensor when permitting the drive of the starter motor. Here, since the SBW-ECU is a relatively expensive component, it is difficult to reduce the cost of a vehicle that requires such an SBW-ECU.

A vehicle starting device that solves the above problems includes an engine control device for controlling an internal combustion engine, a starter motor for starting the engine that is driven when a permission signal for permitting driving is output, and a shift range for an automatic transmission. and a shift position sensor that outputs a shift position signal corresponding to the shift position, which is the operating position of the shift lever. The engine controller acquires the shift position signal. In this starting device, the shift position signal acquired by the engine control device is a signal indicating a predetermined shift position, and a start request signal indicating that a vehicle driver has requested to start the internal combustion engine is provided. It has a permission signal output section for outputting the permission signal when it occurs.

According to this configuration, the engine control device acquires the shift position signal. Therefore, there is no need to separately provide an SBW-ECU for acquiring the shift position signal, and the cost of the vehicle can be reduced.

Further, in the starting device, the permission signal output unit is the engine control device that executes permission signal output processing, and the permission signal output processing acquires the shift position signal and the start request signal, The process of outputting the permission signal may be performed when the obtained shift position signal indicates a predetermined shift position.

Further, in the starting device, the permission signal output unit is configured using a relay, and the engine control device, when the obtained shift position signal is a signal indicating a predetermined shift position, The shift position permission signal may be output to the relay, and the relay may output the permission signal when the shift position permission signal and the start request signal are input.

1 is a schematic diagram showing a vehicle starting device according to a first embodiment; FIG. It is a schematic diagram showing a vehicle starting device according to a second embodiment. FIG. 5 is a schematic diagram showing a vehicle starting device according to a modification of the first embodiment;

(First embodiment)
A first embodiment of a vehicle starter will be described below with reference to FIG.
<Configuration of vehicle starting device>
As shown in FIG. 1, a vehicle 500 includes an internal combustion engine 10 and a starter motor 15 for starting the engine.

A vehicle 500 includes a shift lever mechanism 20 having a shift lever operated by a vehicle driver to select a shift range of an automatic transmission provided in the vehicle 500 . The shift lever mechanism 20 is provided with shift positions such as "P (parking range)", "R (reverse range)", "N (neutral range)", and "D (drive range)". "P" and "N" are shift positions at which the automatic transmission is in a non-power transmission state, and "D" and "R" are shift positions at which the automatic transmission is in a power transmission state.

The shift lever mechanism 20 includes a shift position sensor 34 that outputs a shift position signal SFT corresponding to the shift position, which is the operating position of the shift lever.
The vehicle 500 includes a smart switch 32 that is pressed and operated by the vehicle driver when there is a request to start the internal combustion engine 10 . A signal line of the smart switch 32 is connected to the SMART-ECU 200 . The SMART-ECU 200 includes a central processing unit (CPU), a memory in which control programs and data are stored, and the like. The SMART-ECU 200 outputs various signals indicating the operation state of the smart switch 32 to the control device 100, which will be described later, by the CPU executing the program stored in the memory. These various signals include a start request signal SD that is output when the vehicle driver requests to start the internal combustion engine 10 .

Vehicle 500 includes a first relay R1. The contact of the first relay R1 is normally open and connected to the drive power source of the starter motor 15 and the motor of the starter motor 15 . One end of both ends of the coil of the first relay R1 is grounded, and the other end is connected to the output port of the control device 100 . When a permission signal SA that permits driving of the starter motor 15 is output from the output port of the control device 100, the coil of the first relay R1 is energized and the contacts of the first relay R1 are closed, thereby causing the starter motor 15 to is driven.

Vehicle 500 includes a control device 100 . The control device 100 is an engine control device that controls control amounts (intake air amount, injected fuel amount, ignition timing, etc.) of the internal combustion engine 10 .
The control device 100 includes a central processing unit (hereinafter referred to as CPU) 110, a memory 120 storing control programs and data, and the like. Then, the control device 100 executes various control-related processes by causing the CPU 110 to execute the programs stored in the memory 120 . This control device 100 acquires various signals relating to the operation of the vehicle 500 and the internal combustion engine 10 . Such various signals include the above-described shift position signal SFT and start request signal SD.

Vehicle 500 includes a permission signal output unit that outputs permission signal SA when shift position signal SFT acquired by control device 100 indicates a predetermined shift position and start request signal SD is output. have.

The permission signal output unit of the present embodiment is composed of a control device 100 that executes the following permission signal output processing. Control device 100 executes the following process as the permission signal output process. That is, control device 100 acquires shift position signal SFT and start request signal SD. Then, when the obtained shift position signal SFT is a signal indicating the predetermined shift position, the process of outputting the permission signal SA is executed. As the predetermined shift position, the shift position at which the automatic transmission is in a non-power transmission state, that is, "P" or "N" is set.

<Action>
The operation of this embodiment will be described.
The control device 100 directly acquires the shift position signal SFT and also acquires a start request signal SD indicating a start request of the internal combustion engine 10 by the vehicle driver. Then, when the shift position signal SFT indicating that the shift position of the shift lever mechanism 20 is "N" or "P" is input and the start request signal SD is input, the first relay R1 is sent from the controller 100. A permission signal SA is output in response. When the permission signal SA is output to the first relay R1, the starter motor 15 starts to be driven by operating the first relay R1 as described above. Thus, in this embodiment, the starter motor 15 starts to be driven when the shift position is "N" or "P".

Note that when the engine speed of the internal combustion engine 10 exceeds a predetermined speed by driving the starter motor 15, the control device 100 starts fuel injection and ignition in the internal combustion engine 10 to ignite the air-fuel mixture.

<effect>
Effects of the present embodiment will be described.
When permitting the driving of the starter motor 15, the control device 100 directly acquires the shift position signal SFT. Therefore, unlike the conventional technology described above, there is no need to separately provide an SBW-ECU for acquiring the shift position signal SFT, and the cost of the vehicle 500 can be reduced.

(Second embodiment)
A second embodiment of the vehicle starter will be described below with reference to FIG.
This embodiment differs from the first embodiment in the configuration of the permission signal output section. Therefore, the starting device of the present embodiment will be described below, focusing on such differences.

As shown in FIG. 2, vehicle 500 includes a second relay R2.
The vehicle 500 includes an ignition switch 31 operated by the vehicle driver when there is a request to start the internal combustion engine 10 instead of the smart switch 32 . A contact of the ignition switch 31 is normally open, and one end thereof is connected to a power supply for supplying power to the coil of the first relay R1. The other end of the contact of the ignition switch 31 is connected to the contact of a second relay R2, which will be described later. When the vehicle driver operates the ignition switch 31 to close the contact of the ignition switch 31, the start request signal SD is input to the second relay R2, which will be described later.

Vehicle 500 includes the second relay R2. The contacts of this second relay R2 are normally open. One end of the contact of the second relay R2 is connected to the ignition switch 31, and the other end is connected to the coil of the first relay R1. One end of both ends of the coil of the second relay R2 is grounded, and the other end is connected to the output port of the control device 100. FIG.

When the obtained shift position signal SFT is a signal indicating the predetermined shift position described above, that is, "P" or "N", control device 100 outputs shift position permission signal SFTA from the output port to second relay R2. Execute the process to output to.

When the shift position permission signal SFTA is output from the output port of the control device 100, the coil of the second relay R2 is energized and the contacts of the second relay R2 are closed. When the contacts of the ignition switch 31 are closed while the contacts of the second relay R2 are closed, the coil of the first relay R1 is energized from the second relay R2. , the permission signal SA is output to the first relay R1. When the coil of the first relay R1 is energized in this way, the contact of the first relay R1 is closed and the starter motor 15 is driven.

As described above, in the present embodiment, the second relay R2 is configured to output the permission signal SA when the shift position permission signal SFTA and the start request signal SD are input. The above-described permission signal output section is constructed by.

<Action>
The operation of this embodiment will be described.
Control device 100 directly acquires shift position signal SFT. Then, when a shift position signal SFT indicating that the shift position of the shift lever mechanism 20 is "N" or "P" is input, the control device 100 sends a shift position permission signal SFTA to the second relay R2. Output. When a start request signal SD indicating a start request of the internal combustion engine 10 by the vehicle driver is generated while the shift position permission signal SFTA is being input to the second relay R2, the second relay R2 switches to the first relay R1. A permission signal SA is output in response. When the permission signal SA is output to the first relay R1, the starter motor 15 starts to be driven by operating the first relay R1 as described above. Thus, in this embodiment as well, the drive of the starter motor 15 is started when the shift position is "N" or "P".

<effect>
Effects of the present embodiment will be described.
Also in this embodiment, when permitting the starter motor 15 to be driven, the control device 100 directly acquires the shift position signal SFT. Therefore, unlike the conventional technology described above, there is no need to separately provide an SBW-ECU for acquiring the shift position signal SFT, and the cost of the vehicle 500 can be reduced.

<Change example>
It should be noted that each of the above-described embodiments can be implemented with the following modifications. Each embodiment and the following modifications can be implemented in combination with each other within a technically consistent range.

- The vehicle 500 of the first embodiment includes the smart switch 32 and the SMART-ECU 200 for inputting the start request signal SD to the control device 100 . Alternatively, instead of the smart switch 32 and SMART-ECU 200, the ignition switch 31 described above may be provided.

As shown in FIG. 3, in this modification, one end of the contact of the ignition switch 31 is connected to the power supply. Also, the other end of the contact of the ignition switch 31 is connected to the input port of the control device 100 . When the vehicle driver operates the ignition switch 31 to close the contact of the ignition switch 31, the input port of the control device 100 receives the start request signal SD indicating that the vehicle driver has requested to start the internal combustion engine 10. A Hi signal is input. One end of the contact of the ignition switch 31 may be grounded instead of being connected to the power supply. In this case, when the ignition switch 31 is closed by the driver's operation of the ignition switch 31, the Lo signal is input to the input port of the controller 100 as the start request signal SD.

Even with such a modified example, it is possible to obtain the action and effect according to the first embodiment.
- The control device 100 is not limited to having the CPU 110 and the memory 120 and executing software processing. For example, a dedicated hardware circuit (such as an ASIC, for example) that processes at least part of the software processing performed in the above embodiments may be provided. That is, the control device 100 may have any one of the following configurations (a) to (c). (a) A processing device that executes all of the above processes according to a program, and a program storage device such as a memory that stores the program. (b) A processing device and a program storage device for executing part of the above processing according to a program, and a dedicated hardware circuit for executing the remaining processing. (c) provide dedicated hardware circuitry to perform all of the above processing; Here, there may be a plurality of software processing circuits including a processing device and a program storage device, or a plurality of dedicated hardware circuits. That is, the processing may be performed by a processing circuit comprising at least one of one or more software processing circuits and one or more dedicated hardware circuits.

DESCRIPTION OF SYMBOLS 10... Internal combustion engine 15... Starter motor 20... Shift lever mechanism 31... Ignition switch 32... Smart switch 34... Shift position sensor 100... Control device 110... Central processing unit 120... Memory 200... SMART-ECU
500... vehicle R1... 1st relay R2... 2nd relay

Claims (3)

An engine control device for controlling an internal combustion engine, a starter motor for starting the engine driven when a permission signal for permitting driving is output, and a shift lever mechanism having a shift lever for selecting a shift range of an automatic transmission. and a shift position sensor that outputs a shift position signal corresponding to the shift position, which is the operating position of the shift lever,
The engine control device acquires the shift position signal,
When the shift position signal acquired by the engine control device is a signal indicating a predetermined shift position and a start request signal indicating that the vehicle driver has requested to start the internal combustion engine is generated, A vehicle starting device having a permission signal output section for outputting a permission signal. The permission signal output unit is the engine control device that executes permission signal output processing,
The permission signal output process is a process of obtaining the shift position signal and the start request signal, and outputting the permission signal when the obtained shift position signal indicates a predetermined shift position. Item 2. A vehicle starting device according to item 1. The permission signal output unit is configured using a relay,
When the obtained shift position signal indicates a predetermined shift position, the engine control device outputs a shift position permission signal to the relay,
The vehicle starter according to claim 1, wherein the relay outputs the permission signal when the shift position permission signal and the start request signal are input.

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