Methods and systems are provided for a PM sensor. In one example, a method comprises flowing exhaust gas to a cone-shaped PM sensor having a pair of openings arranged across from one another and a plurality of outlets distal to the pair of openings.

A system and method for particulate matter reduction. A diesel particulate filtration system includes an inlet, an outlet, an exhaust path between the inlet and the outlet, a diesel particulate filter positioned in the exhaust path between the inlet and the outlet, and a bypass valve, wherein the diesel particulate filtration system is configured to have a diesel engine operatively coupled to the inlet. The bypass valve being configured to open when a maximum allowable engine backpressure is exceeded. When the bypass valve is closed, exhaust gas including particulate matter passes through the diesel particulate filter. When the bypass valve is open, a portion of the exhaust gas passes through the diesel particulate filter and the remainder of the exhaust gas passes through the bypass valve and at least 40 percent of said particulate matter is removed from said exhaust gas.

A system and method for particulate matter reduction. A diesel particulate filtration system includes an inlet, an outlet, an exhaust path between the inlet and the outlet, a diesel particulate filter positioned in the exhaust path between the inlet and the outlet, and a bypass valve, wherein the diesel particulate filtration system is configured to have a diesel engine operatively coupled to the inlet. The bypass valve being configured to open when a maximum allowable engine backpressure is exceeded. When the bypass valve is closed, exhaust gas including particulate matter passes through the diesel particulate filter. When the bypass valve is open, a portion of the exhaust gas passes through the diesel particulate filter and the remainder of the exhaust gas passes through the bypass valve and at least 40 percent of said particulate matter is removed from said exhaust gas.

Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include indicating degradation of a hose coupled across a particulate filter responsive to a difference between a first differential pressure and a second differential pressure being greater than a threshold, the first differential pressure measured by a differential pressure sensor positioned in the hose responsive to a downstream exhaust tuning valve being fully open, the second differential pressure measured by the differential pressure sensor responsive to the exhaust tuning valve being fully closed.

Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include indicating degradation of a hose coupled across a particulate filter responsive to a difference between a first differential pressure and a second differential pressure being greater than a threshold, the first differential pressure measured by a differential pressure sensor positioned in the hose responsive to a downstream exhaust tuning valve being fully open, the second differential pressure measured by the differential pressure sensor responsive to the exhaust tuning valve being fully closed.

Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include during conditions where a differential pressure sensor is exposed to changing exhaust pressure, indicating degradation of a hose coupled across a particulate filter in an exhaust system responsive to a change in differential pressure measured by the differential pressure sensor being different than an expected change, the differential pressure sensor positioned in the hose and the particulate filter positioned upstream of an exhaust tuning valve.

Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include during conditions where a differential pressure sensor is exposed to changing exhaust pressure, indicating degradation of a hose coupled across a particulate filter in an exhaust system responsive to a change in differential pressure measured by the differential pressure sensor being different than an expected change, the differential pressure sensor positioned in the hose and the particulate filter positioned upstream of an exhaust tuning valve.

Methods and systems are provided for a PM sensor. In one example, a method comprises flowing exhaust gas to a cone-shaped PM sensor having a pair of openings arranged across from one another and a plurality of outlets distal to the pair of openings.

Methods and systems are provided for a PM sensor. In one example, a method comprises flowing exhaust gas to a cone-shaped PM sensor having a pair of openings arranged across from one another and a plurality of outlets distal to the pair of openings.

An internal combustion engine, ICE, system for a vehicle includes an ICE operable on hydrogen; an exhaust gas aftertreatment system, EATS, arranged in an exhaust gas circuit downstream the ICE, said EATS having at least one NOx reduction device and/or a particulate filter, and an exhaust gas water recovery, EWR, system arranged at least partly downstream the EATS in the exhaust gas circuit, said EWR system having at least a primary exhaust cooler and a water separator; a waste heat recovery, WHR, system for providing a rankine cycle, said WHR system being arranged to transport a working fluid, WF, through the primary exhaust cooler of the EWR system; a low temperature coolant circuit in fluid communication with an exhaust condenser of the EWR system; and a water management system arranged to collect water from the EWR system and transport water to at least one combustion chamber of the ICE.