Controller for cylinder cut-off for multi-cylinder internal combustion engine

摘要

A controller for cylinder cut-off for a multi-cylinder internal combustion engine including a partially operable cylinder that can be cutoff by a cut-off cylinder mechanism provided therewith and a full operating cylinder that is not cut off, the controller for cylinder cut-off including a partially operable cylinder side catalyst temperature estimating section, a full operating cylinder side catalyst temperature estimating section, and a cylinder cut-off authorization determining section for determining whether to authorize or prohibit a cut-off of the partially operable cylinder based on a partially operable cylinder side catalyst temperature estimated by the partially operable cylinder side catalyst temperature estimating section: and a full operating cylinder side catalyst temperature estimated by the full operating cylinder side catalyst temperature estimating section.