VEHICLE CONTROLLER

摘要

A vehicle controller of a working example of the invention conducts fail-safe control to cut power transmission from a drive source to a driven wheel by releasing the clutch of an automatic transmission when gear shift fails. Generally, if the temperature of the hydraulic oil of the automatic transmission is low (for example, below zero), the viscosity of the hydraulic oil is high and the response of power cut is degraded. In consideration of the problem, if the hydraulic oil temperature at the time of requesting gear shift is low (steps ST2, ST3), the clutch of the automatic transmission is released simultaneously with the gear shift request to cut the power transmission (step ST11), and thereby the clutch release lag at the time when gear shift fails at low hydraulic oil temperatures is prevented.