Supervisory thermal management system and method for engine system warm up and regeneration

摘要

This disclosure provides a thermal management system and method that can recommend operational behavior to an operator of an engine system to optimize fuel economy over a period of time in which a components of the engine system is in a warm up and/or regeneration state. In one representative embodiment, the expected temperature change of the engine component at a later time is determined based on inefficient operation of the engine, such as a transmission down shift resulting in higher engine speed and lower engine torque, and the expected temperature change of the engine component resulting from operating the engine under current conditions or expected conditions at that later time is determined. A determination is made as to whether the inefficient engine operation is the optimal operation in view of fuel economy and a recommendation is generated for the operator based if optimal operation is determined.

主权项

1. A method of managing vehicle engine/transmission systems to assist in thermal management of an engine aftertreatment DOC warm-up system, the method comprising:
receiving data indicative of at least one current vehicle operating condition, said at least one current vehicle operating condition data including data signifying at least one of transmission out power and speed, current gear number, transmission gearing set, current engine temperature, current engine speed, current engine torque, and fueling; receiving data from engine fueling maps based on warm-up conditions; receiving a target temperature related to DOC light-off; determining a first expected exhaust temperature based on a transmission down shift and higher engine speed in view of said operating condition data and said fueling maps; determining a second expected exhaust temperature based on a transmission down shift and higher engine speed coupled with late post fuel injection; determining a third expected exhaust temperature based on late post fuel injection and non-shifted transmission; comparing said first, second and third expected exhaust temperatures against said target temperature; and providing a transmission gear shift recommendation in view of the compared expected exhaust temperatures based on an improvement of overall fuel economy.