公开(公告)号：US20210079818A1

公开(公告)日：2021-03-18

申请号：US16963688

申请日：2018-02-05

Applicant: VOLVO TRUCK CORPORATION

Inventor： Arne ANDERSSON ,  Bengt LASSESSON

IPC: F01L9/02 ,  F01M1/08 ,  F01M11/02 ,  F02D13/02

Abstract: The present invention relates to a method for controlling lubrication of a connecting rod bearing of an internal combustion engine arrangement. The method comprises the steps of controlling an inlet valve to be maintained in the closed position during a movement of the reciprocating piston from the top dead center during an intake stroke for a predetermined number of crank angle degrees; and positioning the inlet valve in the open position when the reciprocating piston has traveled the predetermined number of crank angle degrees from the top dead center, wherein lubricating medium is provided to the connecting rod bearing within a predetermined time period before the inlet valve is arranged in the open position.

公开(公告)号：US20210164389A1

公开(公告)日：2021-06-03

申请号：US16954078

申请日：2017-12-20

Applicant: VOLVO TRUCK CORPORATION

Inventor： Bengt LASSESSON ,  Fredrik RAHM

IPC: F02B75/02

Abstract: The invention relates to a method (100) for operating an internal combustion engine (2), such as an internal combustion engine of a vehicle (1), the engine (2) comprising an engine cylinder (3) at least partly defining a combustion chamber (4) and a reciprocating piston (5), a number of inlet valves (20) in fluid communication with the combustion chamber and a number of exhaust valves (30) in fluid communication with the combustion chamber, wherein any one of the inlet valves and the outlet valves comprises at least one flow control valve. The method comprises the following steps: opening (105) at least one of the inlet valves and introducing the incoming fluid medium into the cylinder (3) of the engine by performing an intake stroke (S1); compressing (110) the trapped incoming fluid medium in a first compression stroke (CS1) of the cylinder (3), while having the number of the inlet valves and the number of the exhaust valves in a closed state; injecting (115) a quantity of fuel into the cylinder (3) and combusting said injected fuel; performing (120) a first work stroke (WS1) to produce power to a crank shaft of the engine, while controlling said flow control valve to partly exhaust burnt gases at the end of the work stroke; additionally compressing (125) remaining fluid medium in an additional compression stroke (CS2) of the cylinder (3), while having the number of the inlet valves and the number of the exhaust valves in a closed state; additionally injecting (130) an additional quantity of fuel into the cylinder (3); additionally performing (135) an additional work stroke (WS2) to produce power to the crank shaft of the engine, while controlling said flow control valve to partly exhaust burnt gases at the end of the additional work stroke; and opening (180) at least one of the exhaust valves and permitting partly burnt gases to expel from the cylinder via said at least one exhaust valve by performing an exhaust stroke (ES).

公开(公告)号：US20180355786A1

公开(公告)日：2018-12-13

申请号：US15781129

申请日：2015-12-07

Applicant: VOLVO TRUCK CORPORATION

Inventor： Stig Arne SVENSSON ,  Lennart LANGERVIK ,  Björn JACOBSSON ,  Viktor HUGGARE ,  Bengt LASSESSON

IPC: F02B21/00 ,  F02B29/02 ,  F02B37/12 ,  F02D41/00 ,  F02D41/40

CPC classification number: F02B21/00 ,  F02B29/02 ,  F02B37/12 ,  F02B2037/125 ,  F02D41/0002 ,  F02D41/0007 ,  F02D41/008 ,  F02D41/401 ,  F02D2200/0406 ,  Y02T10/144 ,  Y02T10/146 ,  Y02T10/42 ,  Y02T10/44

Abstract: A control system for an internal combustion engine (ICE) is provided including a control unit configured for operating an electrically controlled valve for supplying compressed air to at least one cylinder depending on an operational mode for the ICE. A method for controlling such an ICE (200), and a computer are also provided.