Claims:1. A system (100) for improving exhaust flow rate to enable soot load
detection in a vehicle, said vehicle comprising a Diesel Particulate Filter
(DPF) (140), a Diesel Oxidation Catalyst (DOC) (130), 5 a controller (110)
and pressure sensor (142, 144),
characterized in that,
said system (100) comprising:
 a compressor (120) configured to supply air mass;
10  a compressor path (122) adapted to deliver the air mass from said
compressor (110) to exhaust passage in said vehicle, said
compressor path (122) connected to exhaust passage upstream of
said DOC (130); and
 a valve (124) in said compressor path (122) adapted to control flow
15 of air mass between said compressor path (122) and exhaust
passage.
2. The system (100) as claimed in claim 1, wherein said controller (110),
calibrated with predetermined threshold exhaust flow rate, capable of
determining an exhaust mass flow in exhaust passage of said vehicle.
3. The system (100) as claimed in claim 1, wherein said controller (110)
adapted to actuate said compressor (120) when the exhaust mass flow
in exhaust passage is lower than predetermined threshold exhaust flow
rate.
4. The system (100) as claimed in claim 1, wherein said controller (110)
25 capable of shutting off said compressor (120) when the exhaust mass
flow in exhaust passage equals or exceeds predetermined threshold
exhaust flow rate.
5. A method for soot load detection in a vehicle, said vehicle comprising
a DPF (140), a DOC (130), a compressor (120), a controller (110), a
valve (124), a compressor path (122) and pressure sensors (142, 144),
said method comprising the steps of:
 determining, by said controller (110), an exhaust 5 mass flow in
exhaust passage of said vehicle;
 activating, by said controller (110), said pressure sensors (142, 144)
to measure pressure of exhaust mass flow at inlet and outlet of said
DPF (140);
detecting, by said controller (110), soot load accumulated in said
DPF (140) based on variation in pressure across said DPF;
characterized in that,
 operating said compressor (120), by said controller (110),
based on the exhaust mass flow in exhaust passage and
15 predetermined threshold exhaust flow rate.
6. The method as claimed in claim 5, wherein said controller (110),
calibrated with predetermined threshold exhaust flow rate, capable of
determining an exhaust mass flow in exhaust passage of said vehicle.
7. The method as claimed in claim 5, wherein said controller (110) adapted
20 to actuate said compressor (120) when the exhaust mass flow in
exhaust passage is lower than predetermined threshold exhaust flow
rate.
8. The method as claimed in claim 5, wherein said controller (110) capable
of shutting off said compressor (120) when the exhaust mass flow in
25 exhaust passage equals or exceeds predetermined threshold exhaust
flow rate.
9. A controller (110) for soot load detection in a vehicle (100), said vehicle
(100) comprising a DPF (140), a DOC (130), a compressor (120), a
valve (124), a compressor path (122) and pressure sensors (142, 144),
said controller (110) configured to:
 determine an exhaust mass flow in exhaust 5 passage of said vehicle;
 activate said pressure sensors (142, 144) to measure pressure of
exhaust mass flow at inlet and outlet of said DPF (140);
 detect soot load accumulated in said DPF (140) based on variation
in pressure across said DPF;
10 characterized in that,
said controller (110) adapted to:
 actuate said compressor (120) when the exhaust mass flow
in exhaust passage is lower than predetermined threshold
exhaust flow rate.
10. The controller (110) as claimed in claim 9, capable of shutting off said
compressor (120) when the exhaust mass flow in exhaust passage
equals or exceeds predetermined threshold exhaust flow rate. , Description:A system (100), method and controller (110) to detect soot load in DPF of a
vehicle. The system (100) for improving exhaust flow rate to enable soot load
detection in the vehicle comprising a compressor (120) configured to supply
air mass, a compressor path (122) adapted to deliver the 5 air mass from the
compressor (110) to exhaust passage in the vehicle, the compressor path
(122) connected to exhaust passage upstream of the DOC (130) and a valve
(124) in the compressor path (122) adapted to control flow of air mass between
the compressor path (122) and exhaust passage.