VEHICLE CONTROLLER

摘要

A vehicle controller includes an hybrid vehicle (HV) ECU, a motor-generator (MG) ECU, a brake ECU, a first communication line that enables one-to-one connection between the HV ECU and the MG ECU, and a second communication line that enables connection among plural ECUs including the HV ECU and the brake ECU. The MG ECU calculates an operation torque of first and second MGs. The MG ECU is communicable with the brake ECU via the second communication line. In addition, the controller includes a microcomputer that serves as a travel state determiner for determining whether a travel state of a hybrid vehicle is a transition state in which a drive wheel alternatively slips and grips. Based on a determination result of the microcomputer, the controller switches to the first communication line in a normal state and to the second communication line in the transition state.

主权项

1. A vehicle controller for controlling a hybrid vehicle in which an internal-combustion engine, a first motor-generator, and a second motor-generator are connected to a drive axle and a drive wheel via a power splitting mechanism, the vehicle controller comprising:
an HV ECU controlling the hybrid vehicle; an MG ECU controlling a drive of the first motor-generator and the second motor-generator; a brake ECU controlling a friction brake device, the control of the friction brake device provides a desired amount of braking force which is a sum total of a regenerative braking force from each of the first motor-generator and the second motor-generator and a braking force from the friction brake device; a first communication line connecting one-to-one the HV ECU and the MG ECU; and a second communication line connecting the HV ECU and other ECUs including the brake ECU, wherein the MG ECU calculates a demand torque of the first motor-generator and the second motor-generator based on a total drive power of the vehicle calculated by the HV ECU, the MG ECU communicates with the brake ECU via the second communication line, and the MG ECU includes:
a travel state determiner determining whether a travel state of the hybrid vehicle is (i) a transition state in which the drive wheel alternates between slipping and gripping with a road surface or (ii) a normal state that is other than the transition state; anda communication selector selecting either of the first communication line or the second communication line based on a determination result of the travel state determiner.