Daf Trucks N.v.

Ignace Theodorus Maria Van Den Heuvel

Thijs Adriaan Cornelis Van Keulen

Tim Weidema

A control system is arranged to control the heater system; wherein the control system is programmed to heat the exhaust after treatment system based on a setpoint value. The control system comprises a controller having an error input and an output; that outputs a heating power setpoint value that is adjusted by a feedback signal, said adjusted setpoint value provided in parallel to a branch including the heater system and a branch including a dynamic response system. The dynamic response system comprises a dynamic response part and a delay part. A first subtractor subtracts a measured heat output and an output of the dynamic response system; an adder adds an output of the dynamic response part and an output of the first subtractor. A second subtractor subtracts a heating power setpoint from the output of the adder to provide a control error signal for the error input of the controller.

Heater control for an after treatment system

A monitoring system and method for detecting clogging through fouling of an air filter () of an internal combustion engine () comprising a differential pressure sensor means () for determining a differential pressure between an ambient environment and a position directly downstream of the air inlet filter. The system further comprising at least one exhaust flow sensor means () for determining the exhaust flow, and a controller () which is communicatively connected to each of the sensor means for processing information therefrom. The controller is arranged for determining a first filter resistance coefficient based on, at least, a measurement of the differential pressure, and the exhaust flow. The system is arranged for, using the controller, to calculate a second filter coefficient based on the historic evolution of the first filter coefficient, the controller further arranged for comparing the second filter coefficient to a boundary value, and generating a clogging alarm signal when the second filter coefficient exceeds said boundary value.

Monitoring system, method and vehicle comprising such a system, for detecting clogging through fouling of an air filter of an internal combustion engine

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Eindhoven, Netherlands

Ignace Theodorus Maria Van Den Heuvel