LIMITING TRANSMISSION FUNCTION WHILE IN REGENERATION MODE FOR A DIESEL PARTICULATE FILTER

摘要

System and method for regenerating a diesel particulate filter in the exhaust system of an internal combustion engine driven vehicle that is equipped with an automatic mechanical transmission. The particulate load in the diesel particulate filter is determined to exceed a minimum predetermined threshold amount which is sufficiently high to warrant regeneration of the filter. Current vehicle conditions are determined to exist that permit the establishment of appropriate conditions in the exhaust system to affect regeneration of the particulate loaded filter by appropriately configuring the AMT. The immediate future driving conditions are analyzed to assure they permit operation of the combustion engine under sufficient load and at sufficiently low speeds to maintain a sufficiently high regeneration temperature and exhaust flow in the exhaust system under the control of the AMT to affect regeneration of the diesel particulate filter. Finally, successful regeneration of the filter is executed by appropriately configuring the AMT to cause the combustion engine to run in a manner that establishes a sufficiently high regeneration temperature and exhaust flow in the exhaust system and that is maintained for a prescribed period of time.