Patents by Inventor Erik Höckerdal
Erik Höckerdal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240011428Abstract: The disclosure concerns a method and a control arrangement for controlling valve actuation of an ICE comprising an exhaust valve, an intake valve, and a turbo compressor. The method comprises and the control arrangement is configured to: limiting/limit valve actuation changes of the exhaust and intake valves based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, to maintain a turbo compressor mass flow above a limit mass flow value.Type: ApplicationFiled: November 5, 2021Publication date: January 11, 2024Applicant: Scania CV ABInventors: Erik HÖCKERDAL, Stefan ORRLING, Oskar LEUFVEN, Erik LIND, John KROON
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Patent number: 11649773Abstract: A control device and method for controlling a compression release brake arrangement is provided. The compression release brake arrangement comprises an exhaust valve actuator assembly, a first actuator valve and a second actuator valve. The method comprises controlling the first and second actuator valves to a first state in which one of the actuator valves is open and the other one is closed. The disclosure further relates to a computer program, a computer readable medium, as well as to a vehicle comprising the control device.Type: GrantFiled: June 10, 2020Date of Patent: May 16, 2023Assignee: Scania CV ABInventors: Hans Göransson, Erik Ersvik, Lars-Göran Kjellström, Mats Ekman, Erik Höckerdal, Joakim Sommansson
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Publication number: 20220307430Abstract: A control device and method for controlling a compression release brake arrangement is provided. The compression release brake arrangement comprises an exhaust valve actuator assembly, a first actuator valve and a second actuator valve. The method comprises controlling the first and second actuator valves to a first state in which one of the actuator valves is open and the other one is closed. The disclosure further relates to a computer program, a computer readable medium, as well as to a vehicle comprising the control device.Type: ApplicationFiled: June 10, 2020Publication date: September 29, 2022Applicant: Scania CV ABInventors: Hans GÖRANSSON, Erik ERSVIK, Lars-Göran KJELLSTRÖM, Mats EKMAN, Erik HÖCKERDAL, Joakim SOMMANSSON
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Publication number: 20220136457Abstract: The present invention relates to a control unit for a waste heat recovery system, wherein the waste heat recovery system is operated in a first mode of operation after a first condition is fulfilled and the system is operated in a second mode of operation after a second condition is fulfilled. The invention also relates to a method for starting an expansion device in a waste heat recovery system.Type: ApplicationFiled: March 17, 2020Publication date: May 5, 2022Applicant: Scania CV ABInventors: Svante JOHANSSON, Erik HÖCKERDAL, Björn JOHANSSON
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Publication number: 20210396186Abstract: The invention relates to a method of controlling a variable valve timing arrangement of an internal combustion engine, the variable valve timing arrangement being arranged to control the timing of an intake valve and an exhaust valve of the internal combustion engine, the method comprising: controlling the variable valve timing arrangement so as to delay the intake valve lifts and to advance the exhaust valve lifts in response to at least one parameter representative of a current load of the internal combustion engine passing a certain threshold value, thereby indicating that the internal combustion engine is operated in a low load state The invention relates also to a computer program product comprising program code for a computer for implementing a method according to the invention. The invention relates also to a control arrangement and a vehicle comprising the control arrangement.Type: ApplicationFiled: June 8, 2021Publication date: December 23, 2021Applicant: Scania CV ABInventors: Erik HÖCKERDAL, Anders LARSSON
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Patent number: 10794238Abstract: Provided is a method for changing gear ratio in a gearbox comprising: receiving a signal to change the gear ratio; calculating braking torque that the engine should provide to reduce the rotational speed of the engine to a target rotational speed; phase-shifting a second camshaft in relation to the crankshaft, to a state where the exhaust valve is controlled to be opened during the expansion stroke and closed during the exhaust stroke; disconnecting the engine from the driving wheel; opening and closing the exhaust valve with a decompression device in a transition area between an exhaust stroke and an inlet stroke and also between a compression stroke and an expansion stroke, when the piston is at a top dead center in the cylinder to achieve engine braking through compression in the cylinders during the exhaust stroke and the compression stroke, and f) shifting a gear in the gearbox.Type: GrantFiled: June 28, 2017Date of Patent: October 6, 2020Assignee: Scania CV ABInventors: Niclas Gunnarsson, Erik Höckerdal
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Patent number: 10669951Abstract: A four-stroke internal combustion engine is disclosed comprising an exhaust valve control arrangement with an exhaust valve phase-shifting device configured to phase-shift control of the at least one exhaust valve to a state where the at least one exhaust valve is controlled in such a way that it is opened during the expansion stroke of the engine and closed during the exhaust stroke of the engine, in order to achieve engine-braking via compression in the cylinders during the exhaust stroke. An inlet valve control arrangement comprises an inlet valve phase-shifting device configured to regulate the amount of air pumped through the engine during the engine braking by regulating the phase-shift of the at least one inlet valve. The present disclosure also relates to a vehicle comprising an engine and method of controlling an engine, a computer program and a computer program for performing a method of controlling an engine.Type: GrantFiled: March 15, 2018Date of Patent: June 2, 2020Assignee: Scania CV ABInventors: Niclas Gunnarsson, Michael Vallinder, Anders Larsson, Erik Höckerdal
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Patent number: 10662894Abstract: The invention relates to a method for controlling the temperature of a waste heat recovery system associated with a combustion engine, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source associated with the combustion engine, wherein the condenser of the waste heat recovery system is connected to a cooling system. The method comprises the steps of: determining if a combustion engine associated with the waste heat recovery system is about to be shut down; and controlling the temperature in the waste heat recovery system based on whether the combustion engine is about to be shut down or not.Type: GrantFiled: January 11, 2017Date of Patent: May 26, 2020Assignee: Scania CV ABInventors: Björn Johansson, Erik Höckerdal, Ola Blom
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Patent number: 10662820Abstract: The invention relates to a method for controlling a waste heat recovery system associated with a combustion engine of a vehicle, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source, and wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser. The method comprises the steps of: predicting a shutdown of a combustion engine associated with the system; determining if a predetermined requirement is fulfilled; and if so reducing the temperature in the waste heat recovery system prior to combustion engine shutdown.Type: GrantFiled: January 11, 2017Date of Patent: May 26, 2020Assignee: Scania CV ABInventors: Björn Johansson, Erik Höckerdal, Ola Blom
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Publication number: 20190309655Abstract: The invention relates to a method, system, and computer program product for controlling a waste heat recovery system associated with a vehicle powertrain, the powertrain comprising a combustion engine and a gearbox connected to the combustion engine, the waste heat recovery system comprising a working fluid circuit; an evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the evaporator is arranged for heat exchange between the working fluid and at least one heat source, wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser, and wherein the expander is mechanically coupled to the powertrain. The method comprises the steps of determining the pressure and temperature of the working fluid upstream of the expander; and controlling the rotational speed of the expander based on the determined pressure and temperature.Type: ApplicationFiled: May 12, 2017Publication date: October 10, 2019Applicant: SCANIA CV ABInventors: Björn JOHANSSON, Erik HÖCKERDAL, Thomas TIMREN
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Publication number: 20190257216Abstract: Provided is a method for controlling a waste heat recovery system associated with a powertrain of a vehicle, the powertrain comprising a combustion engine and a gearbox connected to the combustion engine, the waste heat recovery system comprising a working fluid circuit; an evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the evaporator is arranged for heat exchange between the working fluid and at least one heat source, wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser, and wherein the expander is mechanically connected to the powertrain. The method comprises the steps of: predicting a downhill slope which will require braking of the vehicle; reducing the temperature of the evaporator to a predetermined temperature; and turning off the pump and thus the waste heat recovery system.Type: ApplicationFiled: May 12, 2017Publication date: August 22, 2019Applicant: SCANIA CV ABInventors: Björn JOHANSSON, Erik HÖCKERDAL, Thomas TIMREN
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Publication number: 20190211717Abstract: Provided is a method for changing gear ratio in a gearbox comprising: receiving a signal to change the gear ratio; calculating braking torque that the engine should provide to reduce the rotational speed of the engine to a target rotational speed; phase-shifting a second camshaft in relation to the crankshaft, to a state where the exhaust valve is controlled to be opened during the expansion stroke and closed during the exhaust stroke; disconnecting the engine from the driving wheel; opening and closing the exhaust valve with a decompression device in a transition area between an exhaust stroke and an inlet stroke and also between a compression stroke and an expansion stroke, when the piston is at a top dead center in the cylinder to achieve engine braking through compression in the cylinders during the exhaust stroke and the compression stroke, and f) shifting a gear in the gearbox.Type: ApplicationFiled: June 28, 2017Publication date: July 11, 2019Applicant: SCANIA CV ABInventors: Niclas GUNNARSSON, Erik HÖCKERDAL
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A METHOD FOR CONTROLLING THE TEMPERATURE OF A COOLING FLUID IN A COOLING SYSTEM AND A COOLING SYSTEM
Publication number: 20190204022Abstract: Provided is a method for controlling the temperature of a cooling fluid in a cooling system comprising a cooling circuit connected to a condenser of a waste heat recovery system, a cooling pump arranged to circulate a cooling fluid through the cooling circuit and a radiator arranged for cooling the cooling fluid, a bypass circuit, a first and a second valve unit, wherein the first valve unit is arranged to control the flow of cooling fluid through the radiator and the bypass circuit, and the second valve unit controls the flow of cooling fluid passing through the condenser. A condenser-in temperature of the cooling fluid is determined by a first temperature sensor and an engine-in temperature of the cooling fluid is determined by a second temperature sensor. The flow of the cooling fluid is controlled by the first valve unit and/or the second valve unit based on the determined condenser-in and engine-in fluid temperatures.Type: ApplicationFiled: August 22, 2017Publication date: July 4, 2019Applicant: SCANIA CV ABInventors: Björn JOHANSSON, Erik HÖCKERDAL -
Publication number: 20190040764Abstract: The invention relates to a method for controlling a waste heat recovery system associated with a combustion engine of a vehicle, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source, and wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser. The method comprises the steps of: predicting a shutdown of a combustion engine associated with the system; determining if a predetermined requirement is fulfilled; and if so reducing the temperature in the waste heat recovery system prior to combustion engine shutdown.Type: ApplicationFiled: January 11, 2017Publication date: February 7, 2019Applicant: Scania CV ABInventors: Björn JOHANSSON, Erik HÖCKERDAL, Ola BLOM
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Publication number: 20190032597Abstract: The invention relates to a method for controlling the temperature of a waste heat recovery system associated with a combustion engine, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source associated with the combustion engine, wherein the condenser of the waste heat recovery system is connected to a cooling system . The method comprises the steps of: determining if a combustion engine associated with the waste heat recovery system is about to be shut down; and controlling the temperature in the waste heat recovery system based on whether the combustion engine is about to be shut down or not.Type: ApplicationFiled: January 11, 2017Publication date: January 31, 2019Applicant: Scania CV ABInventors: Björn JOHANSSON, Erik HÖCKERDAL, Ola BLOM
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Publication number: 20180274456Abstract: A four-stroke internal combustion engine is disclosed comprising an exhaust valve control arrangement with an exhaust valve phase-shifting device configured to phase-shift control of the at least one exhaust valve to a state where the at least one exhaust valve is controlled in such a way that it is opened during the expansion stroke of the engine and closed during the exhaust stroke of the engine, in order to achieve engine-braking via compression in the cylinders during the exhaust stroke. An inlet valve control arrangement comprises an inlet valve phase-shifting device configured to regulate the amount of air pumped through the engine during the engine braking by regulating the phase-shift of the at least one inlet valve. The present disclosure also relates to a vehicle comprising an engine and method of controlling an engine, a computer program and a computer program for performing a method of controlling an engine.Type: ApplicationFiled: March 15, 2018Publication date: September 27, 2018Inventors: Niclas Gunnarsson, Michael Vallinder, Anders Larsson, Erik Höckerdal