Control apparatus and method for after-treatment system regeneration

A vehicle comprising:

• an internal combustion engine,
• an exhaust system associated with the internal combustion engine,
• an after-treatment device disposed in the exhaust system, and
• a control apparatus comprising:
• a lambda error control configured to provide a lambda error signal based upon a measured lambda value and a predetermined lambda value, the predetermined lambda value being indicative of rich operation;
• an after-injection map configured to provide an after-injection preset based upon a speed of the internal combustion engine and a torque of the internal combustion engine;
• a main injection map configured to provide a torque making main injection preset based upon the speed of the internal combustion engine and the torque of the internal combustion engine;
• a controller configured to provide an after-injection quantity signal based upon the after-injection preset and the lambda error signal and a main injection quantity signal based upon the main injection preset and the lambda error signal;
• and wherein,
• the after-injection quantity signal and the main injection quantity signal are such that the measured lambda value is maintained within a regeneration range.

A method of regenerating an after-treatment device associated with an exhaust system of a vehicle including an internal combustion engine, the method comprising:

• determining a lambda error based upon a measured lambda value and a predetermined lambda value, the predetermined lambda value being indicative of rich operation;
• providing an after-injection quantity signal based upon the after-injection preset value and the lambda error and a main injection quantity signal based upon the main injection preset and the lambda error;
• and wherein,
• the after-injection quantity signal and the main injection quantity signal are such that the measured lambda value is maintained within a regeneration range.