Abstract: A control system for estimating the performance of a compressor is disclosed. The control system has a compressor fluidly connected to an inlet manifold of a power source. The control system also has a power source speed sensor to provide an indication of a rotational speed of the power source, an inlet pressure sensor to provide an indication of a pressure of a fluid within the inlet manifold, an inlet temperature sensor to provide an indication of a temperature of the fluid within the inlet manifold, an atmospheric pressure sensor to provide an indication of an atmospheric pressure, and a control module in communication with each of the sensors. The control module is configured to monitor an engine valve opening duration and an exhaust gas recirculation valve position, and estimate a compressor inlet pressure based on the provided indications, the monitored duration, and the monitored position.

Abstract: A method of operating an engine is provided. The engine may include a combustion chamber and a working member positioned adjacent the combustion chamber. The method may include providing a source of fuel for the engine. The method may also include starting the engine producing power by combusting fuel in the combustion chamber to drive the working member. Additionally, the method may include selectively controlling delivery of the fuel to the combustion chamber at least partially as a function of an air temperature in response to achieving at least one predetermined condition involving the air temperature. The air temperature may be at least one of an ambient air temperature and an intake air temperature.

Abstract: A method for controlling exhaust emissions is disclosed. The method includes producing exhaust having hydrocarbons and directing the exhaust through a converter. The method also includes directing the exhaust from the converter to an environment and determining a first rate indicative of a rate of hydrocarbons directed to the environment. The method further includes comparing the first rate with a predetermined rate and adjusting the production of exhaust, if the first rate is greater than the predetermined rate.

Abstract: A control system for an engine having a combustion chamber is disclosed. The control system has a first sensor, a second sensor, and a third sensor. The first sensor generates a signal indicative of ambient air pressure. The second sensor generates a signal indicative of the pressure of air entering the combustion chamber. The third sensor generates a signal indicative of a speed of the engine. The control system also has a controller configured to reference a first map to determine a first fuel limit value based on the pressure of air entering the combustion chamber and the speed of the engine, reference a second map to determine a second fuel limit value based on the pressure of air entering the combustion chamber and the speed of the engine, and determine a third fuel limit value based on the first and second fuel limit values and the ambient air pressure.

Abstract: A method for altering an operating condition of a filter includes actively increasing the temperature of the filter to a desired temperature below a regeneration temperature and sensing a filter operating condition at about the desired temperature. The method also includes comparing the sensed filter operating condition to an expected filter operating condition range and actively increasing the temperature of the filter to the regeneration temperature in response to the comparison.

Abstract: A particulate trap regeneration system is provided. The system may include a particulate trap configured to remove one or more types of particulate matter from an exhaust flow of an engine. The system may also include a regeneration device configured to reduce an amount of particulate matter in the particulate trap. The system may further include a controller configured to activate the regeneration device in response to the first to occur of at least three trigger conditions.

Abstract: A method to integrate engine and exhaust aftertreatment control may include connecting an engine controller to an aftertreatment controller using a common data link protocol to provide a bidirectional data flow between the engine controller and the aftertreatment controller. The method may also include connecting the engine controller to one or more engine components. The method may also include connecting the aftertreatment controller to one or more aftertreatment components.

Abstract: An engine has a housing and a working member movable within an interior of the housing and separating a combustion chamber from a non-combustion chamber. Additionally, the engine may include a chamber-ventilation system that may include a passageway with a first end of the passageway connected to the non-combustion chamber and a second end of the passageway located downstream of the first end of the passageway. The chamber-ventilation system may further include a filter system disposed within the passageway. The filter system may include a filter housing and a filter disposed in the filter housing. Additionally, the chamber-ventilation system may be configured such that, during operation of the engine, gas travels from the non-combustion chamber, into the first end of the passageway, through the passageway, to the second end of the passageway.