US-12623638-B1 - Vehicle control apparatus

US12623638B1US 12623638 B1US12623638 B1US 12623638B1US-12623638-B1

Abstract

When the switching to the ignition-off state (IG-off state Igoff) is performed, the parking switching position (P switching position Ppos) at a time of switching to the IG-off state Igoff is stored in each of a plurality of non-volatile memories as previous positions Mpp 1 , Mpp 2 , and in a case where the previous positions Mpp 1 , Mpp 2 acquired from each of the non-volatile memories in the IG-off state Igoff match a P lock position Plp or a non-P lock position NPlp, the previous positions Mpp 1 , Mpp 2 that are matched are determined to be the P switching position Ppos in the IG-off state Igoff. As a result, even in the case of the IG-off state Igoff, the P switching position Ppos is determined with high accuracy without performing an initial position determination control.

Inventors

Masataka ISHIZUKA
Takashi Yuma
Yusuke Yamauchi
Masashi Sasaki
Ryosuke Mayumi

Assignees

TOYOTA JIDOSHA KABUSHIKI KAISHA

Dates

Publication Date: 20260512
Application Date: 20250714
Priority Date: 20241112

Claims (2)

1 . A vehicle control apparatus for a vehicle that includes a parking lock device configured to selectively switch, by driving an actuator, a parking switching position between a parking lock position and a non-parking lock position, and in which an electric power source state is switched between an ignition-on state in which vehicle travel is enabled and an ignition-off state in which a power supply related to vehicle travel is turned off and vehicle travel is disabled, the vehicle control apparatus including an electronic control device being configured to perform, in a case where switching to the ignition-on state is performed, initial position determination control of recognizing and determining the parking switching position at a time of switching to the ignition-on state by driving the actuator, wherein: the electronic control device is configured to store, in a case where switching to the ignition-off state is performed, the parking switching position at a time of switching to the ignition-off state in each of a plurality of non-volatile memories as a previous position; and the electronic control device is configured to determine, in a case where the previous position acquired from each of the non-volatile memories matches the parking lock position or the non-parking lock position in the ignition-off state, the previous position that is matched, as the parking switching position in the ignition-off state.
2 . The vehicle control apparatus according to claim 1 , wherein one of the non-volatile memories is provided in the parking lock device.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Japanese Patent Application No. 2024-197771 filed on Nov. 12, 2024. The disclosure of the above-identified application, including the specification, drawings, and claims, is incorporated by reference herein in its entirety. BACKGROUND 1. Technical Field The present disclosure relates to a control apparatus for a vehicle including a parking lock device selectively switching a parking switching position between a parking lock position and a non-parking lock position by driving an actuator. 2. Description of Related Art A vehicle including a parking lock device in which a parking switching position is selectively switched between a parking lock position and a non-parking lock position by driving an actuator is known. In such a vehicle, an electric power source state is switched between an ignition-on state in which vehicle travel is enabled and an ignition-off state in which a power supply related to vehicle travel is turned off and vehicle travel is disabled. In the vehicle, when switching to the ignition-on state is performed, control of recognizing and determining the parking switching position at a time of switching to the ignition-on state by driving the actuator is well known. For example, a shift control device for a vehicle described in Japanese Patent No. 5310871 (JP 5310871 B) performs the control. JP 5310871 B discloses a parking lock device switching a parking switching position by using a motor as a drive source. A rotation of the motor is controlled to a target rotation amount by reading a count value of an encoder, and switching to a target parking switching position is performed. In addition, when the switching to the ignition-on state is performed, so-called wall abutment control is performed in which abutment to a wall position, which is a limit position of a movement range of the parking switching position, is performed and a reference position is learned. With the wall abutment control, control (hereinafter, referred to as initial position determination control) of initializing the parking lock device and determining an initial position of the parking switching position (parking lock position or non-parking lock position) is performed. With the initial position determination control, the subsequent switching is possible. SUMMARY In the vehicle, the parking switching position is not determined unless switching to the ignition-on state is performed, but in recent vehicles, the parking switching position may be requested to be determined even in the ignition-off state. For example, an electrified vehicle is equipped with a function of performing electric power charging from the outside of the vehicle or electric power supply to the outside of the vehicle (hereinafter, referred to as external bidirectional charging). In the implementation of the external bidirectional charging in the ignition-off state in which the vehicle does not travel, the parking switching position needs to be in the parking lock position from the viewpoint of accident prevention due to rolling or cable dragging of the vehicle and safety assurance due to connection with a high-voltage system (battery). However, in the ignition-off state, there is a problem that the parking switching position is not determined. As a measure, when the external bidirectional charging is performed in the ignition-off state, it is considered that the initial position determination control is performed to determine the parking switching position. However, in this method, the number of times of performing the initial position determination control may increase, which may affect durability of the parking lock device. Further, a measure may be considered in which the parking switching position is stored in the non-volatile memory as a previous position when the switching to the ignition-off state is performed, and the parking switching position is determined with reference to the stored previous position. However, in this method, since the parking switching position is stored in a single non-volatile memory, it is possible that an erroneous determination is made even when the current position is in fact not the parking lock position, for example, when the parking lock device is replaced. Therefore, there is a demand for increasing the accuracy of the determination. The present disclosure is made in view of the above circumstances, and is to provide a vehicle control apparatus capable of increasing the accuracy of determination of a parking switching position even when the vehicle is in an ignition-off state in which vehicle travel is disabled. According to a gist of a first disclosure, (a) a vehicle control apparatus for a vehicle that includes a parking lock device configured to selectively switch, by driving an actuator, a parking switching position between a parking lock position and a non-parking lock position, and in which an electric power source state is switched betw