Control apparatus and method for vehicle having internal combustion engine and continuously variable transmission, and control apparatus and method for internal combustion engine

Abstract

A control apparatus is provided for a vehicle including an internal combustion engine and a continuously variable transmission capable of controlling an output speed of the engine. A controller of the control apparatus determines a first operating point at which a total fuel consumption amount is minimized as an optimal operating point, such that the total fuel consumption amount is obtained by adding an amount of a fuel consumed by an exhaust purifying device disposed in an exhaust system to an amount of a fuel consumed by the engine for generating a required output. The controller then controls an engine load and also controls a speed ratio of the transmission so that the engine operates at the optimal operating point.

1 . A control apparatus for an internal combustion engine that causes a first emission and a second emission to be generated upon combustion of a fuel, wherein an amount of the second emission in an exhaust gas increases as an operating state of the engine is changed so as to reduce an amount of the first emission in the exhaust gas, the control apparatus comprising:
 a controller that:
 determines an emission history of one of the first and second emissions during an operation of the internal combustion engine; and 
 changes the operating state of the internal combustion engine, executed at predetermined constant intervals after rich spike or a recovery process of a filter is executed, based on the determined emission history of the one of the first and second emissions, wherein the operating state of the internal combustion engine is set to a point on an equi-output line for the internal combustion engine, wherein the equi-output line is defined by engine speed of the internal combustion engine and torque of the internal combustion engine. 
   
   
   
       2 . A method of controlling an internal combustion engine that causes a first emission and a second emission to be generated upon combustion of a fuel, wherein an amount of the second emission in an exhaust gas increases as an operating state of the engine is changed so as to reduce an amount of the first emission in the exhaust gas, comprising the steps of:
 determining an emission history of one of the first and second emissions during an operation of the internal combustion engine; and   changing the operating state of the internal combustion engine, executed at predetermined constant intervals after rich spike or a recovery process of a filter is executed, based on the determined emission history of the one of the first and second emissions, wherein the operating state of the internal combustion engine is set to a point on an equi-output line for the internal combustion engine, wherein the equi-output line is defined by engine speed of the internal combustion engine and torque of the internal combustion engine.