Patent ID: 6244258
Filing Date: 2001-06-12
Classification: F02D,F02M,Y02T

Abstract:
An EGR controller for a cylinder cut-off engine, which controls an EGR action so that exhaust gas from said cylinder cut-off engine is recirculated to an induction side via an EGR path, said cylinder cut-off engine being changeable over a running state between an all-cylinder run where all cylinders are running and a cut-off-cylinder run where a part of the cylinders are cut off, said EGR controller comprising:an open/close unit opening and closing said EGR path;a detecting unit detecting an engine temperature at said cylinder cut-off engine;a comparing unit comparing said engine temperature detected by said detecting unit with a first predetermined temperature and a second predetermined temperature that is lower than said first predetermined temperature;a determining unit determining whether the running state of said cylinder cut-off engine is said all-cylinder run or said cut-off-cylinder run; anda control unit controlling said EGR action so as to be executed when said engine temperature is higher than said first predetermined temperature at said all-cylinder run, and when said engine temperature is higher than said second predetermined temperature at said cut-off-cylinder run, by driving said open/close unit so as to open or close in accordance with a result of comparison by said comparing unit and on a result of determination by said determining unit.