US 12,378,905 B2
Exhaust system, controller and method for an internal combustion engine
Adam Moorcroft, Birmingham (GB); and Mohammad Sadique, Coventry (GB)
Assigned to JAGUAR LAND ROVER LIMITED, Warwickshire (GB)
Appl. No. 18/564,581
Filed by JAGUAR LAND ROVER LIMITED, Coventry (GB)
PCT Filed May 27, 2022, PCT No. PCT/EP2022/064425
§ 371(c)(1), (2) Date Nov. 27, 2023,
PCT Pub. No. WO2022/248672, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2107677 (GB), filed on May 28, 2021.
Prior Publication US 2024/0254905 A1, Aug. 1, 2024
Int. Cl. F01N 3/029 (2006.01); B01D 46/44 (2006.01); B01D 46/84 (2022.01); F01N 3/05 (2006.01); F01N 3/22 (2006.01); F01N 3/30 (2006.01); F01N 3/32 (2006.01); F01N 9/00 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/029 (2013.01) [B01D 46/442 (2013.01); B01D 46/448 (2013.01); B01D 46/84 (2022.01); F01N 9/002 (2013.01); F01N 13/009 (2014.06); B01D 2279/30 (2013.01); F01N 3/05 (2013.01); F01N 3/222 (2013.01); F01N 3/225 (2013.01); F01N 3/303 (2013.01); F01N 3/32 (2013.01); F01N 2250/06 (2013.01); F01N 2270/04 (2013.01); F01N 2550/04 (2013.01); F01N 2550/14 (2013.01); F01N 2900/04 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1606 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An exhaust system for exhausting combustion gases from an internal combustion engine, the exhaust system comprising:
an exhaust conduit for conveying exhaust gases from the internal combustion engine;
a particulate filter for filtering particulates from the exhaust gases conveyed by the exhaust conduit;
a supply inlet arranged to introduce gas into the particulate filter to promote regeneration, the supply inlet being disposed upstream of the particulate filter and downstream of a catalytic convertor;
a control valve for controlling the supply of gas to the particulate filter to control regeneration; and
a controller configured to control the control valve to control regeneration of the particulate filter, the controller being configured to:
determine a particulate loading of the particulate filter; and
output a control signal to control the control valve to control regeneration of the particulate filter in dependence on the determined particulate loading;
wherein the controller is configured to compare the determined particulate loading to a predetermined first loading threshold;
wherein the control signal comprises an open valve request to open the control valve and a fuel cut request to inhibit the supply of fuel to the engine, both in dependence on a determination that the particulate loading is greater than the first loading threshold;
wherein the controller is configured to compare the determined particulate loading to a predetermined second loading threshold, the second loading threshold being greater than zero and less than the first loading threshold;
wherein the control signal comprises a close valve request to close the control valve in dependence on a determination that the particulate loading is less than the second loading threshold; and
wherein the controller is configured to compare the determined particulate loading to a predetermined third loading threshold, and when the determined particulate loading decreases to the third loading threshold or below, to reinstate the supply of fuel to the engine.