Volvo Truck Corporation

Volvo Lastvagnar Ab

Hoganas Ab

Volvo Technology Corporation

Lennart Andersson

Arne Andersson

Staffan Lundgren

Bengt Johansson

Nhut Lam

Ingemar Magnusson

Jonas Edvardsson

Lucas Megas

Andreas Hinz

Jonas Jansson

Carl-Johan Karlsson

Anders Tuomivaara

Bert-Inge Bertilsson

Peter Mårdberg

Fredrik Rahm

Edward Jobson

Marcus Leidefeldt

Lennart Cider

Per-Olof Larsson

Johanna Bergström

Heije Westberg

Malin Ehleskog

Soran Shwan

Martin Lunden

Peter Jozsa

Mathias Magnusson

Owe Mars

Jörgen Knuth-Nielsen

Lucan Megas

Lennart Zander

Kristin Holmqvist

Mathias Magnussson

Martin LUNDÉN

Per Persson

Per Salomonsson

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.

Internal combustion engine system

Provided are a method and an ICE system, including an internal combustion engine including a first and a second set of cylinders. A first and a second EGR valve control flow of exhaust gas from the cylinders to an EGR conduit. A controller controls the closing of the second EGR valve, thereby preventing flow of exhaust gas from the second set of cylinders to the EGR conduit. The second EGR valve is upstream of a turbine. The controller is configured to activate a fuel injector for late post injection of fuel into the second set of cylinders when the second EGR valve is closed, so that at least a part of the fuel that exits the second set of cylinders is uncombusted. An exhaust gas aftertreatment system receives and treats exhaust gas which is not recirculated in the EGR conduit, and includes an oxidation catalyst for combustion.

Internal combustion engine system and a method of operating an internal combustion system

The present disclosure relates to a method for determining urea feeding in an exhaust gas aftertreatment system (), the exhaust gas aftertreatment system () being connectable to an internal combustion engine () operating under an engine operating condition, the system () comprising a first Selective Catalytic Reduction (SCR1) system comprising a first selective reduction catalyst (SCR1c) and a first doser () configured for feeding urea upstream the SCR1 system, at least one Particulate Filter (PF) downstream the SCR1 system or as a substrate for the SCR1c and a second Selective Catalytic Reduction (SCR2) system downstream the PF, the SCR2 system comprising a second selective reduction catalyst (SCR2c) and a second doser () configured for feeding urea upstream the SCR2c, the method comprising the steps of estimating the amount of particles in the PF; and determining the amount of urea to be fed by the respective first and second doser () based on the engine operating condition and such that: a) the amount of particles in the PF is within a predefined particle amount range, and, b) the NOx level of the exhaust gas exiting the SCR2 system is within a predetermined NOx level range. The present disclosure also relates to an exhaust gas aftertreatment system () and a vehicle comprising the exhaust gas aftertreatment system (), a computer program comprising program code means for performing the steps of the method, a computer readable medium carrying a computer program comprising program code means for performing the steps of the method and a control unit for controlling urea feeding in the exhaust gas aftertreatment system ().

Method for determining urea feeding in an exhaust gas aftertreatment system of a vehicle comprising an internal combustion engine

An aftertreatment system () connected downstream an internal combustion engine arrangement () for receiving combustion gas exhausted from the internal combustion engine arrangement () during operation thereof, the aftertreatment system () comprising a primary aftertreatment system () comprising a first catalytic reduction arrangement (); a secondary reduction system () comprising a second catalytic reduction arrangement ().

Aftertreatment system

The present invention relates to a method for controlling an internal combustion engine arrangement, which method comprises the steps of controlling an outlet valve to be arranged in an at least partial open position during a portion of an intake stroke; and providing a reducing agent to at least a portion of the flow of combustion gas exhausted from the combustion cylinder during an exhaust stroke.

Method for controlling an internal combustion engine arrangement

A start-up method for heating a selective catalytic reduction (SCR) module in a hybrid propulsion system of a vehicle. An internal combustion engine is in fluid communication with an exhaust aftertreatment system having an exhaust. An SCR module is disposed in the exhaust passage downstream of the engine and an electric motor. The method includes operating the engine in a start-up mode with a torque restriction on the engine, allowing the SCR module to convert NOx emission; supplying a surplus amount of a reducing agent to the exhaust gas at a position between the engine and the SCR module, the surplus amount of the reducing agent being larger than a required amount of reducing agent for converting NOx emission from the engine; heating said SCR module to a working temperature; and terminating the start-up mode.

Start-up method for a vehicle with a hybrid propulsion system

The invention provides a method for controlling an internal combustion engine () for controlling an internal combustion engine () comprising at least one first cylinder () and at least one second cylinder () with respective reciprocating pistons, an intake guide () arranged to guide air from a fresh air intake arrangement () to the first and second cylinders (), a fuel system () arranged to inject fuel into the first and second cylinders (), a first exhaust guide () and a second exhaust guide () arranged to guide gases from the first and second cylinders (), respectively, towards an exhaust after treatment system (), the method comprising&#x2014;receiving (S) in the first cylinder (), from the intake guide (), air from the fresh air intake arrangement () or gases including air from the fresh air intake arrangement (), &#x2014;expelling from the first cylinder (), to the first exhaust guide (), gases in the form of the air received in the first cylinder, or in the form of exhaust gases from combustions in the first cylinder, including a portion of the air received in the first cylinder (), &#x2014;controlling (S) a first exhaust valve () located in the first exhaust guide () so as to reduce or inhibit the transport of the gases from the first cylinder () to the exhaust after treatment system () and simultaneously recirculating the gases from the first exhaust guide () to the intake guide () by means of an exhaust gas recirculating (EGR) passage (), &#x2014;receiving in the second cylinder (), from the intake guide (), at least a portion of the gases recirculated from the first exhaust guide () to the intake guide (), &#x2014;injecting (S) fuel into the second cylinder () so as to provide repetitive combustions with air in the received gases, &#x2014;expelling from the second cylinder (), to the second exhaust guide (), the exhaust gases produced by the combustions in the second cylinder (), and&#x2014;controlling a second exhaust valve () located in the second exhaust guide () so as to guide the exhaust gases expelled from the second cylinder through the second exhaust guide () towards the exhaust after treatment system ().

Method for controlling an internal combustion engine

The invention provides an internal combustion engine system () comprising&#x2014;at least one combustor (), and&#x2014;a first expander () arranged to receive exhaust gases from at least one of the at least one combustor (), and to expand and extract energy from the exhaust gases &#x2014;characterized in that the system comprises a second expander () arranged to receive exhaust gases from the first expander (), and to expand and extract energy from the exhaust gases.

Internal combustion engine system and a method for an internal combustion engine system

The present invention relates to an internal combustion engine arrangement () comprising a first () and a second () expansion cylinder, and an interconnection conduit () between an outlet () of the first expansion cylinder () and an outlet () of the second expansion cylinder (), wherein the outlet of the first expansion cylinder is further arranged in fluid communication with an exhaust gas recirculation (EGR) conduit () for delivery of a flow of combusted exhaust gas to an intake passage of the internal combustion engine arrangement, and wherein the second expansion cylinder comprises a reducing agent injection device () for controllably delivery of a reducing agent into the second expansion cylinder.

Internal combustion engine arrangement

A method for controlling an internal combustion engine system, the engine system including a combustor arranged to receive air and fuel, and combust the received air and fuel, an expander arranged to expand exhaust gases from the combustion in the combustor and to extract energy from the expanded exhaust gases, and a communication valve arranged to control a communication between the combustor and the expander, including determining during operation of the engine system whether there is a pressure difference across said communication valve.

Method for controlling an internal combustion engine system

The present invention relates to a fuel tank arrangement () for an internal combustion engine () of a vehicle, the fuel tank arrangement () comprising a fuel tank () for containing a combustible gas; wherein the fuel tank arrangement further comprises a combustible gas burning arrangement () for combustion of combustible gas, said combustible gas burning arrangement () being positioned in downstream fluid communication with the fuel tank () via a first conduit.

Fuel tank arrangement with a gas burning arrangement and a pressure controlled valve to heat auxiliary vehicle components

A method of controlling an internal combustion engine with a plurality of cylinders includes injecting a first gaseous fuel, at a first pressure, into at least a first cylinder of the cylinders, in a first combustion mode, and simultaneously providing a second gaseous fuel, at a second pressure which is different than the first pressure, for at least a second cylinder of the cylinders, in a second combustion mode which is dissimilar to the first combustion mode, wherein the second cylinder is not the first cylinder.

An internal combustion engine system includes at least one combustor, and a first expander arranged to receive exhaust gases from at least one of the at least one combustor, and to expand and extract energy from the exhaust gases, wherein the system includes a second expander arranged to receive exhaust gases from the first expander, and to expand and extract energy from the exhaust gases.

Internal combustion engine system and a method for an internal combustion system

An internal combustion engine system includes a compressor arranged to compress air, at least one combustor, at least one of the at least one combustor being arranged to receive the compressed air, and an exhaust treatment device arranged to process exhaust gases produced by at least one of the at least one combustor, a heat exchanger arranged to receive the compressed air from the compressor before it reaches the at least one of the at least one combustor, and wherein the heat exchanger is arranged to transfer heat from the compressed air to the exhaust treatment device.

Internal combustion engine system and an exhaust treatment unit for such a system

A method of controlling a high pressure gas injection internal combustion engine includes injecting, in a first combustion mode, by a first as injection system, a first gaseous fuel into a cylinder of the engine, and accumulating in a container of a second gas injection system excess gaseous fuel from the first fuel system, shifting, in the cylinder, from the first combustion mode to a second combustion mode including determining a value of an air flow related parameter indicative of an air mass flow into the cylinder, determining, based on the determined air flow related parameter value, a value of a fuel flow related parameter indicative of a mass flow of the excess gaseous fuel, and supplying from the container, in accordance with the determined fuel flow related parameter value, the excess gaseous fuel to provide a premix of air and the excess gaseous fuel to the cylinder.

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Varberg, Sweden

Lennart Andersson