Ford Global Technolgoies, LLC

Jens Wojahn

Klemens Grieser

Oliver Berkemeier

Kay Hohenboeken

Marco Marceno

Jan Linsel

Ludwig Stump

Helmut Ruhland

Moritz Klaus Springer

Thomas Lorenz

Georg Louven

Franz J Brinkmann

Harald Stoffels

Bernd Schumacher

Joerg Kemmerling

Vanco Smiljanovski

Themi Philemon Petridis

Martin Wirth

Frank Kraemer

Embodiments for an engine coupled to a first turbocharger and a second turbocharger are provided. One example includes responsive to a first condition, deactivating a first turbine of the first turbocharger and meeting a boost demand via operation of the second turbocharger, and responsive to deactivating the first turbine, increasing a pressure at a compressor-side end of a bearing arrangement of a shaft of the first turbocharger. In this way, oil leakage from the bearing arrangement may be reduced.

Method for operating an internal combustion engine with parallel supercharging and with an activatable turbine, and internal combustion engine for carrying out a method of said type

Embodiments for controlling boost pressure during transient conditions are disclosed. In one example, a method includes, responsive to deactivation of a first turbine of a first turbocharger, deactivating an exhaust valve of a cylinder to flow exhaust gas from the cylinder to a second turbine of a second turbocharger, and adjusting a speed of the second turbocharger via an electric machine coupled to the second turbocharger in a generator mode; and responsive to activation of the first turbine, activating the exhaust valve to flow exhaust gas from the cylinder to the first turbine and the second turbine, and adjusting the speed of the second turbocharger via the electric machine in an auxiliary drive mode.

Method for charge pressure control of an internal combustion engine with turbines arranged in parallel, and internal combustion engine for carrying out such a method

Methods are provided for an engine including modifying fuel injection timing based on engine operating conditions. A delay time period calculation may be based on a comparison of a first engine load with a second engine load. Further, a modified injection start time, based on a delay time period, may include injecting fuel during the compression cycle of an engine.

Internal combustion engine with direct injection and reduced particulate emissions

Methods and systems are provided for reducing coking deposits in a fuel injection system. In one example, a method may comprise humidifying intake air of an intake system of an engine in response to a determination that fuel injector coking is occurring, or after a duration has passed since a most recent humidification event. A humidifying fluid, such as water, may be injected into the intake system to humidify the intake air, and the resulting humidified intake air may reduce and/or remove coking deposits on one or more direct fuel injectors of the fuel injection system.

Systems and methods for removing coking deposits in a fuel injection system

The disclosure relates to a method for operating an internal combustion engine having a plurality of cylinders, the method comprising, during one working cycle, distributing fuel for each cylinder of the plurality of cylinders among a plurality of injection processes according to settable split factors which respectively define a setpoint fuel mass and/or injection duration and time setting of each respective injection process for the plurality of individual injection processes, wherein random variation is carried out for at least one injection process.

Method and device for operating an internal combustion engine

An injection valve for injecting fuel into a combustion chamber of an internal combustion engine comprises a valve seat, a valve element, at least one injection opening formed in the valve seat and leading to the combustion chamber, the at least one injection opening opened or closed by a stroke motion of the valve element, a catalytic coating provided in a region of the injection valve which faces the combustion chamber, and at least one protuberance which is elongated in a direction of the combustion chamber and projects into the combustion chamber.

Injection valve

A turbocharger for an internal combustion engine includes an oil-lubricated bearing, a feed line for the oil and a throughflow limiter for the oil.

Turbocharger for an internal combustion engine and method for operating a turbocharged internal combustion engine

Systems and methods are provided for reducing coking residues on an injection device of an applied-ignition, direct injection engine. An example system comprises an injection device; an electric heating device integrated with the injection device; a catalytic coating on a surface of the injection device; and a controller suitable to initiate a cleaning mode of the injection device wherein the electric heating device raises the temperature of the injection device. Heating the injection device allows coking residues on the injection device to oxidize in the presence of the catalytic coating.

Applied-ignition internal combustion engine with catalytically coated injection device, and method for operating an internal combustion engine of said type

A turbocharger arrangement in an internal combustion engine is provided. The turbocharger arrangement includes a turbocharger housing surrounding a sealed inner space and a shaft extending through the turbocharger housing. The turbocharger arrangement further includes a turbine wheel arranged on the shaft and driving a compressor unit, a bearing arrangement mounting the shaft in the turbocharger housing, an oil supply device lubricating the bearing arrangement, and a pressure changing unit in fluidic communication with the sealed inner space configured to adjust the pressure in the sealed inner space based on engine operating conditions.

Turbocharger arrangement for an internal combustion engine

A method controlling combustion modes of an engine with at least a first and second cylinder, the engine having a first actuator configured to control at least intake valves of the first and second cylinder and a second actuator configured to control at least exhaust valves of the first and second cylinders, the method comprising of sending a first signal to the first actuator which adjusts operation of at least intake valves of the first and second cylinder and a second signal to the second actuator which adjusts operation of at least exhaust valves of the first and second cylinder, said first and second signals sent at different crank angles, and transitioning combustion modes of said first and second cylinders, said combustion modes including spark ignition and homogeneous compression ignition.

Growing community of inventors

Bergisch Gladbach, Germany

Jens Wojahn