US 11,441,520 B2 · Method of determining an operational status of an EGR valve

Abstract

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.

Claims13

Dependent claims

controlling the EGR valve to transition from a closed position, in which combusted exhaust gas is prevented from reaching the inlet manifold, to an open position, in which combusted exhaust gas is allowed to flow from the exhaust manifold to the inlet manifold;
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.

3 more elements

A control unit configured to determine an operational status of an exhaust gas recirculation valve of an internal combustion engine arrangement, the control unit being connected to the EGR valve for controlling operation of the EGR valve, and to a temperature sensor configured to measure temperature of gas present in an inlet manifold of the ICE arrangement, wherein the control unit comprises control circuitry configured to:

control the EGR valve to transition from a closed position, in which combusted exhaust gas is prevented from reaching the inlet manifold, to an open position, in which combusted exhaust gas is allowed to flow from an exhaust manifold of the ICE arrangement to the inlet manifold;
obtain a signal from the temperature sensor, the signal being 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;
determine, based on the signal indicative of the variation of the temperature level, a velocity value indicative of a maximum increase in change of temperature during the time period between the first point in time and the second point in time;
compare the velocity value with a predetermined threshold;
and
determine that the EGR valve is operational when the velocity value is higher than the predetermined threshold.

3 more elements

Dependencies are inferred from the claim text.

Method of determining an operational status of an EGR valve

Life of this patent

Method of determining an operational status of an EGR valve

Life of this patent

Abstract

Claims13