Volvo Truck Corporation

Amanda Larsson

Karsten Rohrssen

Neelam Bhamra

Rucha Wagh

Håkan Olsson

Katarina Raaholt Larsson

Wagh Rucha

Method for non-intrusive response time evaluation of a component, unit or system of a vehicle

A method of determining an operational status of an exhaust gas recirculation valve of an internal combustion engine arrangement, the EGR valve being configured to control a flow of combusted exhaust gas from an exhaust manifold to an inlet manifold of the ICE arrangement. The method comprising controlling the EGR valve to transition from a closed position; obtaining a signal indicative of a variation of temperature level of the gas present in the inlet manifold at a duration between a first point in time and a second point in time when the EGR valve assumes the open position; determining, based on the signal indicative of the variation of the temperature level, a velocity value indicative of a maximum increase in change of temperature level during the time period between the first point in time and the second point in time; comparing the velocity value with a predetermined threshold; and determining that the EGR valve is operational when the velocity value is higher than the predetermined threshold.

Method of determining an operational status of an EGR valve

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Borås, Sweden

Amanda Larsson