Volvo Truck Corporation

Anders Mohlin

Malin Ehleskog

Jens Pedersen

The present disclosure relates to an internal combustion engine system including an internal combustion engine comprising a cylinder; an air guide arranged to guide air to the cylinder; at least one inlet valve adapted to selectively provide a fluid communication between said air guide and said cylinder; and an inlet valve actuation assembly for actuating said at least one inlet valve, said inlet valve actuation assembly being adapted to actuate said at least one inlet valve in accordance with one of at least two lift modes during a combustion cycle of said internal combustion engine. The internal combustion engine system is adapted to be operated in a first operation mode in which said throttle arrangement is arranged in an at least partially closed condition and said inlet valve actuation assembly actuates said at least one inlet valve according to a second of the at least two lift modes.

Internal combustion engine system

The invention relates to a method to control an internal combustion engine. The internal combustion engine comprises a cylinder, an air guide arranged to guide an airflow to the cylinder, an exhaust guide arranged to guide an exhaust flow from the cylinder. The method comprises the step to determine a value of at least one engine operation parameter. Further, the method comprises the step to determine a target value of an exhaust performance parameter depending on the determined engine operation parameter value. Lastly, the air flow through the air guide and the exhaust flow through the exhaust guide is controlled depending on the determined target exhaust performance parameter value.

Method for controlling an internal combustion engine, a computer program, a computer readable medium, a control unit, an internal combustion engine, and a vehicle

The invention relates to a method to control an internal combustion engine. The internal combustion engine comprises a cylinder, an exhaust guide arranged to guide an exhaust flow from the cylinder through a turbine, and a bypass guide arranged to bypass a bypass flow from the cylinder past the turbine. The method comprises the step to determine a value of at least one engine operation parameter. The method is characterized by the step to determine a target value of an exhaust performance parameter depending on the determined engine operation parameter value. Further, the method comprises, depending on the determined target exhaust performance parameter value, the step to control the exhaust flow through the exhaust guide and the step to control the bypass flow through the bypass guide.

A method of controlling an internal combustion engine in a vehicle that includes a cylinder, a fuel system for supplying fuel to the cylinder, an air guide arranged to guide an air flow to the cylinder, and an exhaust guide arranged to guide a gas flow from the cylinder, the method including controlling the engine to provide a braking torque, the control including terminating the supply of fuel to the cylinder, restricting the flow through the exhaust guide, and restricting the flow through the air guide. The control of the engine to provide a braking torque also includes determining a value of a rotational speed of a turbocharger of the engine, and adjusting, in dependence on the determined turbocharger rotational speed value, the restriction of the flow through the air guide, and/or the restriction of the flow through the exhaust guide.

Internal combustion engine and a method for controlling a braking torque of the engine

The invention provides an operation system for a vehicle, comprising an internal combustion engine () comprising a cylinder (), and an exhaust guide () being arranged to guide a gas flow from the cylinder () to the atmosphere, wherein the vehicle operation system further comprises a pneumatic system (), and an air conduit () connecting the pneumatic system () with the exhaust guide () for allowing a flow of compressed air from the pneumatic system into the exhaust guide ().

System for improved engine braking

An internal combustion engine includes a cylinder including a piston connected to a rotatable crankshaft, an air guide arranged to guide an air flow to the cylinder an adjustable air flow restriction element arranged to restrict the How through the air guide, an exhaust guide being arranged to guide a gas flow from the cylinder, an adjustable exhaust flow restriction element arranged to restrict the flow through the exhaust guide, an exhaust valve arranged to control a communication between the cylinder and the exhaust guide, and an exhaust valve actuation assembly for actuating the exhaust valve so as to perform in each of a plurality of cycles of the cylinder an exhaust valve actuation sequence, wherein the exhaust valve actuation assembly is adapted to control the commencement of the exhaust valve actuation sequence to occur selectively at any crankshaft angle within a non-zero crankshaft angle interval.

An internal combustion engine is provided including a cylinder including a piston connected to a rotatable crankshaft, an exhaust guide being arranged to guide a gas flow from the cylinder, an adjustable flow restriction element arranged to restrict the flow through the exhaust guide, an exhaust valve arranged to control a communication between the cylinder and the exhaust guide, and an exhaust valve actuation assembly for actuating the exhaust valve so as to perform in each of a plurality of cycles of the cylinder an exhaust valve actuation sequence, wherein the exhaust valve actuation assembly is adapted to control the commencement of the exhaust valve actuation sequence to occur selectively at any crankshaft angle within a non-zero crankshaft angle interval.

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Kungsbacka, Sweden

Anders Mohlin