INCORPORATION BY REFERENCE

The disclosure of Japanese Patent Application No. 2019-103565 filed on Jun. 3, 2019 including the specification, drawings and abstract is incorporated herein by reference in its entirety.

BACKGROUND

1. Technical Field

The disclosure relates to a vehicle system.

2. Description of Related Art

Research on autonomous driving of a vehicle is being actively carried out. For example, described in Japanese Unexamined Patent Application Publication No. 2018-132015 (JP 2018-132015 A) is a vehicle system in which an autonomous driving ECU having a function of sensing the vicinity of a vehicle is provided in the vehicle separately from an engine ECU and the autonomous driving ECU issues a command to the engine ECU via a vehicle-mounted network.

When an ECU that manages traveling of a vehicle and an ECU for autonomous driving are made independent of each other as in JP 2018-132015 A, it is possible to add an autonomous driving function without applying a great change to an existing vehicle platform. In addition, it can be expected that a third party is prompted to develop an autonomous driving function.

SUMMARY

It is not desirable in a viewpoint of security or the like that the ECU for autonomous driving becomes able to directly control traveling of the vehicle not via the ECU (for example, engine ECU) that manages traveling of the vehicle. In other words, it is desirable that traveling of the vehicle during autonomous driving is indirectly controlled via the ECU that manages traveling of the vehicle without being directly controlled by the ECU for autonomous driving. However, in such a control system, there is a possibility that it becomes difficult to appropriately stop the vehicle by means of the ECU for autonomous driving in a case where the ECU that manages traveling of the vehicle becomes not able to be normally operated as in a case where there is an abnormality in an electric power source for the ECU that manages traveling of the vehicle.

The disclosure provides a highly reliable vehicle system.

An aspect of the disclosure relates to a vehicle system including a first vehicle platform, a second vehicle platform, and an autonomous driving platform. The first vehicle platform includes a first computer configured to operate by means of electric power supplied from a first electric power source and perform traveling control of a vehicle. The second vehicle platform includes a second computer configured to operate by means of electric power supplied from a second electric power source different from the first electric power source and perform traveling control of the vehicle. The autonomous driving platform includes a third computer configured to perform autonomous driving control of the vehicle by transmitting a control instruction including data for autonomously driving the vehicle to the first computer when the first vehicle platform is in a normal state and perform autonomous stoppage control of the vehicle by transmitting a control instruction including data for causing the vehicle to autonomously stop to the second computer when the first vehicle platform is in an abnormal state.

According to the aspect of the disclosure, it is possible to provide a highly reliable vehicle system.

