Method and system for monitoring of a physical quantity related to a particulate mass in at least one exhaust pipe

A computer program product comprising computer program code stored on a non-transitory computer-readable medium readable by a computer, said computer program product used for monitoring of a quantity of a particulate mass M in at least one exhaust pipe arranged downstream of at least one combustion engine and downstream of at least one or several particulate filters, and which is emitted into the atmosphere, said computer program code comprising computer instructions to cause one or more computer processors to perform the operations of:

• receiving from one or more pressure sensors information regarding sensed pressure in the exhaust system before and after the at least one or several particulate filters arranged downstream of said at least one combustion engine;
• determining, using the sensed pressures, a reduction Δ of a pressure difference dP at least over one or several of the particulate filters, wherein said reduction Δ is related to a pressure difference dPref over the corresponding at least one or several reference particulate filters;
• determining said quantity of said particulate mass M in the at least one exhaust pipe, based on said determined reduction Δ of said pressure difference dP, and on a predetermined correlation between said reduction Δ of said pressure difference dP and said quantity of said particulate mass M;
• comparing said quantity of said particulate mass M with a defined threshold value Mth;
• and
• provisioning at least one indication to a control separate system related to the result of said comparison.

A system arranged for monitoring of a quantity of a particulate mass M in at least one exhaust pipe arranged downstream of at least one combustion engine and downstream of at least one or several particulate filters, and which is emitted into the atmosphere, said system comprising:

• a first determination device configured to:
• receive from one or more pressure sensors information regarding sensed pressure in the exhaust system before and after the at least one or several particulate filters arranged downstream of said at least one combustion engine and determine, using the sensed pressures, a reduction Δ of a pressure difference dP over at least one or several of the particulate filters, wherein said reduction Δ is related to a pressure difference dPref over the corresponding at least one or several reference particulate filters;
• a second determination device configured for the determination of said quantity of said particulate mass M in the at least one exhaust pipe, based on said determined reduction Δ of said pressure difference dP and on a predetermined correlation between said reduction Δ of said pressure difference dP and said quantity of said particulate mass M;
• a comparison device configured to compare said quantity of said particulate mass M with a defined threshold value Mth;
• and
• a provision device configured for provision of at least one indication to a control system related to the result of said comparison.