CN-122014849-A - Control device for vehicle

CN122014849ACN 122014849 ACN122014849 ACN 122014849ACN-122014849-A

Abstract

The present invention relates to a vehicle control device. When switching to an IG off-off state, that is, when switching to an IG off-off state, a P-switch position (Ppos) which is a parking switch position at the time of switching to the IG off-off state is stored as a previous position (Mpp, mpp 2) in each of the plurality of nonvolatile memories, and when the IG off-off Igoff state is the case where the previous position (Mpp 1, mpp 2) obtained from each of the nonvolatile memories coincides with the P-lock position (Plp) or coincides with the non-P-lock position (NPlp), the coincident previous position (Mpp ) is determined as the P-switch position (Ppos) under the IG off-Igoff state. Thus, even when the IG is off Igoff, the determination of the P-switch position (Ppos) can be performed with improved accuracy without performing the initial position determination control.

Inventors

Ishihata Masataka
You Molongshi
YAMAUCHI YUSUKE
Assistant assistant wood is excellent
Makiumi Ryo

Assignees

丰田自动车株式会社

Dates

Publication Date: 20260512
Application Date: 20251031
Priority Date: 20241112

Claims (2)

1. In a vehicle provided with a parking lock device for selectively switching a parking switch position to a parking lock position and a non-parking lock position by driving an actuator, wherein a power supply state is switchable between an ignition-on state in which traveling is possible and an ignition-off state in which power supply related to traveling is turned off and no traveling is possible, when switching to the ignition-on state, an initial position determination control is performed for identifying and determining the parking switch position at a switching timing to the ignition-on state by driving the actuator, The control device for a vehicle is characterized in that, When switching to the off-ignition state, the parking switch position at the time of switching to the off-ignition state is stored as a previous position in each of a plurality of nonvolatile memories, In the case of the ignition off state, when the previous position acquired from each of the nonvolatile memories coincides with the parking lock position or coincides with the non-parking lock position, the identical previous position is determined as the parking switch position in the ignition off state.
2. The control device for a vehicle according to claim 1, wherein, One of the nonvolatile memories is provided to the parking lock device.

Description

Control device for vehicle Technical Field The present invention relates to a control device for a vehicle provided with a parking lock device that selectively switches a parking switch position to a parking lock position and a non-parking lock position by driving an actuator. Background A vehicle is known that includes a parking lock device that selectively switches a parking switch position to a parking lock position and a non-parking lock position by driving an actuator. In such a vehicle, the power supply state can be switched between an ignition-on state in which traveling is possible and an ignition-off state in which traveling is not possible by turning off the power supply related to traveling. In this vehicle, there is known a control for identifying and determining a parking switch position at a time of switching to an ignition-on state by driving an actuator when switching to the ignition-on state. For example, the shift control device for a vehicle described in japanese patent No. 5310871 performs the above control. Patent number 5310871 describes a parking lock device that uses a motor as a drive source to switch a parking switch position. The rotation of the motor is read by the count value of the encoder and controlled to the target rotation amount, thereby switching to the target parking switch position is performed. Further, when switching to the ignition-on state, the wall position is abutted against the limit position of the movement range of the parking switch position, so-called wall collision control such as learning the reference position is performed. By this collision control, control (hereinafter referred to as initial position determination control) is performed to initialize the parking lock device to determine the initial position (the parking lock position or the non-parking lock position) of the parking switch position. By this initial position determination control, a subsequent handover can be performed. In the vehicle described above, the parking switch position cannot be determined without switching to the ignition-on state, but in recent vehicles, the determination of the parking switch position is sometimes required even in the ignition-off state. For example, an electric vehicle (ELECTRIFIED VEHICLE) is equipped with a function of charging electric power from outside the vehicle and supplying electric power to outside the vehicle (hereinafter referred to as external charging power). In the implementation of external charging and power supply in the off-ignition state without traveling, the parking switch position is required to be the parking lock position in terms of prevention of accidents caused by rolling of the vehicle and cable dragging, and safety assurance accompanied by connection to a high-voltage system (battery). However, in the ignition off state, there is a problem that the parking switch position cannot be specified. As a countermeasure for this, it is considered that when external charging and power supply is performed in the ignition off state, initial position determination control is performed to determine the parking switch position. However, in this method, the number of times of execution of the initial position determination control may increase, which may affect the durability of the parking lock device. Further, it is also conceivable to store the parking switch position as the previous position in the nonvolatile memory when switching to the ignition off state, and to determine the parking switch position by referring to the stored previous position. However, in this method, since only one nonvolatile memory is used for storage, for example, when the parking lock device is replaced, there is a possibility that erroneous determination is actually made although the parking lock position is not the parking lock position. Therefore, it is required to improve the accuracy of the determination. Disclosure of Invention The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a control device for a vehicle that can determine a parking switch position with improved accuracy even in an ignition off state in which the vehicle is not running. The first aspect of the present invention provides (a) a vehicle control device for a vehicle, which is provided with a parking lock device that selectively switches a parking switch position to a parking lock position and a non-parking lock position by driving an actuator, and in which a power supply state is switchable between an ignition on state in which traveling is possible and an ignition off state in which power supply related to traveling is off and no traveling is possible, wherein when switching to the ignition on state, the vehicle control device performs initial position determination control for identifying and determining the parking switch position at a switching timing to the ignition on state by driving the actuator, (B) When switchi