Abstract: A gear assembly includes a primary shaft, a driving gear, a driven gear, a secondary shaft, and a key wherein the primary shaft and the driving gear define a keyway for housing the key. The primary shaft defines a lower region of the keyway while the driving gear defines an upper region of the keyway. The driving gear may be mounted on the primary shaft such that the upper region and the lower regions of the keyway are aligned with each other in order for the keyway to house the key. The driven gear may be mounted on the secondary shaft such that the driven gear may be in meshing engagement with the driven gear. The aforementioned keyway defines a peninsula in a center portion of the driving gear. The peninsula is configured to abut a key disposed within the keyway.

Abstract: An internal combustion engine is configured to periodically open and close combustion chamber exhaust valves of the engine such that one exhaust valve is held open longer than another exhaust valve and/or one exhaust valve opens before another exhaust valve relative to top dead center. The resulting differential exhaust valve timing can at least partially compensate for different swallowing capacities of the scrolls of a twin-scroll turbine.

Abstract: A gear pump can be equipped in an engine oil system. The gear pump has a housing, a first gear, and a second gear. The housing has an outlet passage for exiting oil, and has one or more outlet openings for exiting air. The first gear has a set of first teeth with multiple first roots and first tips. The second gear has a set of second teeth with multiple second roots and second tips. The outlet opening(s) is situated in the housing so that it can communicate with a first clearance, with a second clearance, or with both the first and second clearances. The first clearance is established at the confrontation of one of the first roots and one of the second tips. And the second clearance is established at the confrontation of one of the second roots and one of the first tips.

Abstract: A variable displacement pump is provided which better distributes stress across the rotor structure thereby reducing the risk of the rotor cracking and/or failing. The variable displacement pump includes a housing, a vane control ring, a rotor, a plurality of vanes, a slider ring, a biasing means, and a regulator valve. The housing defines an inlet port and a discharge port. The rotor may be rotationally driven by a drive shaft and coaxially aligned with the drive shaft. The rotor may define a plurality of primary ribs and a plurality of corresponding secondary ribs with an aperture defined between each primary rib and secondary rib. Each primary rib defines a primary rib thickness and each secondary rib defines a secondary rib thickness which is less than the primary rib thickness.

Abstract: The present disclosure provides a charge air cooler system having a manifold charge air cooler, a first charge air cooler and a second charge air cooler wherein each charge air cooler are in fluid communication with each other. The manifold charge air cooler is within a plenum and defines a first chamber and a second chamber within the plenum. The manifold charge air cooler is configured to cool of unsteady flow between the first and second chambers. The first charge air cooler may be configured to cool a first ambient air flow and may be in fluid communication with the first chamber. The second charge air cooler may be configured to cool a second ambient air flow wherein the second charge air cooler is in fluid communication with the second chamber.

Abstract: A method and apparatus that detect a leak of vehicle fluid are provided. The method includes determining whether leak detection is active, capturing a first image of an area while parking a vehicle into the area if the leak detection is active, capturing a second image of the area while the vehicle is exiting from the area, comparing the first image and the second image to detect whether the leak is present, and outputting a notification indicating a leak is present if the comparing detects the leak.

Abstract: A gerotor assembly is provided which includes a crankshaft, an inner drive gear, an outer driven gear and a housing defining an oil groove. The inner drive gear defines a plurality of inner gear teeth. The outer driven gear defines a plurality of outer gear teeth operatively configured to engage with the inner gear teeth. The outer drive gear may define a plurality of passageways to form a hydrodynamic film between the outer driven gear and the housing. Alternatively, a high pressure oil pump may feed oil into the oil groove in order to distribute a hydrodynamic film.

Abstract: A vehicle powertrain includes an engine having an air intake system and an exhaust system. A turbocharger includes a turbine section connected to the exhaust system and a compressor section connected to the air intake system. A wastegate is disposed in the exhaust system and movable between an open and a closed position by an actuator system. The actuator system includes a gear mechanism for moving the waste gate from a closed to an open position and including a pair of noncircular gears.

Abstract: An internal combustion engine includes an engine block including a plurality of cylinders. A cylinder head is mounted to the engine block and includes intake and exhaust passages in communication with the plurality of cylinders. A cylinder head cover is mounted to the cylinder head and defines a cavity between the cylinder head and the cylinder head cover. An oil passage is disposed in the cavity and includes at least one oil jet for spraying oil at a surface of the cylinder head that is heated by the exhaust passages.

Abstract: The present disclosure provides a charge air cooler system having a manifold charge air cooler, a first charge air cooler and a second charge air cooler wherein each charge air cooler are in fluid communication with each other. The manifold charge air cooler is within a plenum and defines a first chamber and a second chamber within the plenum. The manifold charge air cooler is configured to cool of unsteady flow between the first and second chambers. The first charge air cooler may be configured to cool a first ambient air flow and may be in fluid communication with the first chamber. The second charge air cooler may be configured to cool a second ambient air flow wherein the second charge air cooler is in fluid communication with the second chamber.

Abstract: A gear pump can be equipped in an engine oil system. The gear pump has a housing, a first gear, and a second gear. The housing has an outlet passage for exiting oil, and has one or more outlet openings for exiting air. The first gear has a set of first teeth with multiple first roots and first tips. The second gear has a set of second teeth with multiple second roots and second tips. The outlet opening(s) is situated in the housing so that it can communicate with a first clearance, with a second clearance, or with both the first and second clearances. The first clearance is established at the confrontation of one of the first roots and one of the second tips. And the second clearance is established at the confrontation of one of the second roots and one of the first tips.

Abstract: A turbocharger control system of a vehicle includes a trigger module that generates a trigger signal when a transmission of the vehicle is in one of (i) park and (ii) neutral. A wastegate target module, in response to the generation of the trigger signal, sets a target opening of a turbocharger wastegate to a predetermined opening and independently of a position of an accelerator pedal. The predetermined opening is greater than zero percent opening of the turbocharger wastegate. A wastegate actuator module actuates the turbocharger wastegate based on the target opening of the turbocharger wastegate.

Abstract: Provided are methods controlling systems including a turbocharger configured to compress air for an engine, a cooler configured to receive turbocharged compressed air, a radiator, a coolant circuit for circulating coolant between the cooler and the radiator and including a bypass to manipulate coolant flow through the cooler. The methods include closing the bypass when engine speed and/or load exceeds a threshold, and otherwise one or more of reducing coolant flow through the cooler when the coolant temperature entering the cooler is higher than the compressed air temperature entering the cooler, manipulating coolant flow through the cooler based on the temperature of the compressed air received by the engine, and reducing coolant flow through the cooler when the temperature of the coolant entering the radiator is less than a temperature of the ambient air. Reducing coolant flow through the cooler reduces the coolant pressure drop within the coolant circuit.

Abstract: An internal combustion engine includes an engine block including a plurality of cylinders. A cylinder head is mounted to the engine block and includes intake and exhaust passages in communication with the plurality of cylinders. A cylinder head cover is mounted to the cylinder head and defines a cavity between the cylinder head and the cylinder head cover. An oil passage is disposed in the cavity and includes at least one oil jet for spraying oil at a surface of the cylinder head that is heated by the exhaust passages.

Abstract: An automotive vehicle includes a body with a central plane extending vertically along a longitudinal center of the body, with first and second sides on opposing sides of the central plane. The vehicle additionally includes a first movable member coupled to the first side. The first movable member has a first stowed position and a first deployed position. In the first deployed position the first movable member induces a first pressure differential between the first side and the second side. The vehicle also includes a first actuator configured to move the first movable member between the first stowed position and the first deployed position. The vehicle further includes a controller configured to, in response to satisfaction of a first operating condition, control the first actuator to move the first movable member from the first stowed position to the first deployed position.

Abstract: A turbocharger includes a compressor wheel configured to pressurize an airflow for delivery to an internal combustion engine. The turbocharger also includes a turbine wheel configured to be driven by the engine's post-combustion gases and drive the compressor wheel. The turbocharger additionally includes a waste-gate assembly. The waste-gate assembly includes a first waste-gate valve and a second waste-gate valve, wherein each of the first and second waste-gate valves is configured to selectively redirect at least a portion of the post-combustion gases away from the turbine wheel into the exhaust passage. A vehicle having an internal combustion engine operatively connected to such a turbocharger and also employing a controller configured to regulate the first and second waste-gate valves is also disclosed.

Abstract: A vehicle powertrain includes an engine having an air intake system and an exhaust system. A turbocharger includes a turbine section connected to the exhaust system and a compressor section connected to the air intake system. A wastegate is disposed in the exhaust system and movable between an open and a closed position by an actuator system. The actuator system includes a gear mechanism for moving the waste gate from a closed to an open position and including a pair of noncircular gears.

Abstract: A vehicle powertrain includes an engine having an air intake system and an exhaust system. A turbocharger includes a turbine section connected to the exhaust system and a compressor section connected to the air intake system. A wastegate is disposed in the exhaust system and movable between an open and a closed position by an actuator system. The actuator system includes an engagement device and detent mechanism for assisting with holding the wastegate in the closed position.

Abstract: A method and system for determining a drive ratio of a supercharger in a vehicle propulsion system includes sensing an engine speed of an engine in the propulsion system, providing an engine speed signal based upon the sensed engine speed, sensing an inlet air pressure of the supercharger, providing a supercharger inlet air pressure signal based upon the sensed supercharger inlet air pressure over a dedicated communication channel to a processor in the vehicle, and determining, in the processor, a drive ratio for the supercharger based upon the engine speed signal, the supercharger inlet air pressure signal, and a lobe count of the supercharger.

Abstract: An audio control system of a vehicle includes a sound control module configured to determine N magnitudes for outputting a predetermined engine sound at N frequencies, respectively, where N is an integer greater than one. A magnitude adjustment module is configured to determine at least one N magnitude adjustment values for the N frequencies, respectively, based on at least one of: an intake air temperature; and an exhaust temperature. The sound control module is further configured to determine N adjusted magnitudes for the predetermined engine sound at the N frequencies based on: the N magnitudes for the N frequencies, respectively; and the N magnitude adjustment values for the N frequencies, respectively. An audio driver module is configured to apply power to at least one speaker of the vehicle and output the predetermined engine sound at the N frequencies and the N adjusted magnitudes for the N frequencies, respectively.