Control device for variable-compression-ratio internal combustion engine

摘要

A control device for a variable compression ratio internal combustion engine is equipped with a variable compression ratio device capable of changing an engine compression ratio of the internal combustion engine. The control device detects or estimates the temperature of an exhaust component (B11), and sets a target exhaust gas temperature based on the temperature of the exhaust component (B12). A mixing ratio and compression ratio set section (B13) sets a fuel mixing ratio and the engine compression ratio within such a range as not to exceed the target exhaust gas temperature such that energy loss becomes minimum.

主权项

1. A control device for a variable compression ratio internal combustion engine equipped with a variable compression ratio device configured to change an engine compression ratio of the internal combustion engine, the control device comprising:
an exhaust component temperature acquisition section that detects or estimates a temperature of an exhaust component; a target exhaust gas temperature set section that sets a target exhaust gas temperature based on the temperature of the exhaust component; and a mixing ratio and compression ratio set section that sets a fuel mixing ratio of fuel and air and the engine compression ratio within such a range as not to exceed the target exhaust gas temperature such that energy loss is reduced, by referring to a stored basic distribution map based on at least the target exhaust gas temperature, wherein in a case where an operating region is an operating region in which the temperature of the exhaust component is to be restricted to a predetermined limit value or less, and the temperature of the exhaust component is lower than the limit value, the target exhaust gas temperature set section sets the target exhaust gas temperature higher as the temperature of the exhaust component becomes lower.