US 11,754,005 B2
Internal combustion engine
Fredrik Rahm, Hörby (SE); Johan Carlén Andersson, Lund (SE); and Ulf Aronsson, Lund (SE)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Appl. No. 17/256,511
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
PCT Filed Jun. 28, 2019, PCT No. PCT/EP2019/067287
§ 371(c)(1), (2) Date Dec. 28, 2020,
PCT Pub. No. WO2020/002571, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. PCT/EP2018/067546 (WO), filed on Jun. 29, 2018.
Prior Publication US 2021/0277849 A1, Sep. 9, 2021
Int. Cl. F02D 41/00 (2006.01); F02D 13/02 (2006.01); F02M 26/05 (2016.01); F02M 26/16 (2016.01); F02M 26/34 (2016.01); F02D 41/14 (2006.01); F02M 26/22 (2016.01); F02B 37/20 (2006.01); F02B 37/24 (2006.01); F02B 39/04 (2006.01); F02B 39/10 (2006.01); F02B 67/06 (2006.01); F02D 41/26 (2006.01); F02M 35/10 (2006.01)
CPC F02D 41/0007 (2013.01) [F02B 37/20 (2013.01); F02B 37/24 (2013.01); F02B 39/04 (2013.01); F02B 39/10 (2013.01); F02B 67/06 (2013.01); F02D 13/0234 (2013.01); F02D 13/0269 (2013.01); F02D 41/0047 (2013.01); F02D 41/0077 (2013.01); F02D 41/1448 (2013.01); F02D 41/26 (2013.01); F02M 26/05 (2016.02); F02M 26/16 (2016.02); F02M 26/22 (2016.02); F02M 26/34 (2016.02); F02M 35/10222 (2013.01); F02B 2275/32 (2013.01); F02D 2200/0406 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An internal combustion engine comprising a crankshaft, a cylinder including a cylinder head, a piston, a combustion chamber, an intake valve, an exhaust valve, an intake system configured for feeding intake air to the internal combustion engine, an exhaust system configured for conveying exhaust gas away from the internal combustion engine, a pressure charging system connected to the intake system and an exhaust gas recirculation (EGR) system arranged to feed branched off exhaust gas from the exhaust system to the intake system via an EGR conduit,
wherein the internal combustion engine includes a valve actuation device configured to allow for late or early closing of the intake valve in accordance with late or early Miller-type valve timing, wherein the EGR system includes a gas feeding device configured to feed exhaust gas through the EGR conduit in modes of operation where a pressure in the intake system exceeds a pressure in the exhaust system, wherein the gas feeding device is a displacement pump and wherein the gas feeding device is arranged so that exhaust gas recirculating in the EGR system during operation of the internal combustion engine passes the gas feeding device before being mixed with intake air in the intake system,
wherein the gas feeding device is connected to an EGR drive unit,
wherein the gas feeding device is connected to the EGR drive unit via a rotatable drive connection, and
wherein the rotatable drive connection comprises a first shaft member connected to the EGR drive unit and a second shaft member connected to the gas feeding device, wherein the first and second shaft members are connected via a freewheel mechanism configured to allow the second shaft member to rotate at a higher speed than the first shaft member in an operation mode, where the pressure in the exhaust system is higher than the pressure in the intake system at least when an exhaust gas pressure pulse is generated, and the first shaft member forms a driving shaft and the second shaft member forms a driven shaft as the exhaust gas pressure pulse reaches the gas feeding device from the exhaust system, thereby the gas feeding device is driven by the exhaust gas flowing from the exhaust system without drive input from the EGR drive unit to reduce power consumption by the gas feeding device.