| Patent application number | Description | Published |
|---|
| 20080295787 | HYDRAULIC CONTROL SYSTEM FOR A SWITCHING VALVE TRAIN - An engine is provided having an engine block, a cylinder head mounted to the engine block, a valve train mounted to the cylinder head, and a cam cover extending over the valve train and mounted to the cylinder head. A hydraulic system for providing a hydraulic fluid to the valve train is included. The hydraulic system has a first passage extending from the engine block through the cylinder head to the cam cover and connected to a second passage. The second passage extends along a length of the cam cover and is connected to an oil control valve. At least one control passage extends from the oil control valve through the cam cover to the valve train. The oil control valve is mounted to a port in the cam cover and extends into the cam cover in a direction along a width of the cam cover. | 12-04-2008 |
| 20090031970 | SWITCHABLE VALVETRAIN SYSTEM AND METHOD OF OPERATION - A switchable valvetrain system is provided having a control unit and a pressure regulator valve responsive to control signals from the control unit. A pressurized fluid source is provided in communication with the pressure regulator valve. A switchable valvetrain component having a latching mechanism and lubrication circuit in selective communication with the pressurized fluid source through the pressure regulator valve is also provided. The pressure regulator valve is operable to selectively and variably communicate fluid pressure from the pressurized fluid source to the latching mechanism and the lubrication circuit in response to control signals from the control unit. A method of operating the switchable valvetrain system is also provided. | 02-05-2009 |
| 20090031982 | OIL COMMUNICATION MANIFOLD FOR AN INTERNAL COMBUSTION ENGINE - A cylinder head assembly for an internal combustion engine is provided having a cylinder head adapted to contain at least one switchable valvetrain element operable to selectively deactivate at least one intake valve and at least one other switchable valvetrain element operable to selectively deactivate at least one exhaust valve. The cylinder head defines at least one feed passage operable to selectively communicate fluid pressure to the at least one switchable valvetrain element to selectively deactivate the at least one intake valve. The cylinder head defines at least one other feed passage operable to selectively communicate fluid pressure to the at least one other switchable valvetrain element to selectively deactivate the at least one exhaust valve. An oil communication manifold is mounted to the head and defines at least one communication passage operable to enable communication of fluid pressure between the at least one feed passage and the at least one other feed passage. | 02-05-2009 |
| 20100064992 | Eight-Stroke Engine Cycle - An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke may form a first compression stroke and the third stroke may form a first expansion stroke including a first power stroke. The fourth and sixth strokes may form a second and third compression strokes and the fifth and seventh strokes may form a second and third expansion strokes. A second fuel mass may be provided to the combustion chamber during the fourth or sixth stroke. The intake valve may be in a closed position during the second and third expansion strokes and an exhaust valve in communication with the combustion chamber may be in a closed position during the second and third compression strokes. The eighth stroke may form an exhaust stroke including opening the exhaust valve. | 03-18-2010 |
| 20100127718 | ELECTRO-MECHANICAL FLUID SENSOR - A sensor system includes a sensor and a control module. The sensor includes an electrically actuated moving member. The sensor is in fluid communication with a reservoir of a separator that separates a first fluid from a fuel. The control module selectively causes current to be supplied to the sensor to actuate the member. The control module measures the current and determines a parameter of the current. The control module identifies one of presence and absence of the first fluid in the reservoir based on the parameter. | 05-27-2010 |
| 20100224151 | DELAYED EXHAUST ENGINE CYCLE - A method of operating an engine in a delayed exhaust engine cycle may include opening an intake valve of the engine during a first stroke to form an intake stroke. The method may further include closing the intake valve and determining an engine operating temperature. The engine operating temperature may be compared to a predetermined temperature limit. A first fuel mass may be provided to the combustion chamber between an end portion of a second stroke and a beginning portion of a third stroke. The third stroke may form a first power stroke and the intake valve and an exhaust valve in communication with the combustion chamber may be closed during the second and third strokes. The exhaust valve may be maintained in a closed position during a fourth stroke when the engine operating temperature is less than the predetermined temperature limit. | 09-09-2010 |
| 20110220047 | ENGINE WITH DUAL CAM PHASER FOR CONCENTRIC CAMSHAFT - A cam phaser assembly may include a first stator, a first rotor, a second stator and a second rotor. The first stator may be driven by an engine crankshaft. The first rotor may be coupled to a first end of a concentric camshaft and located within the first stator. The first rotor and the first stator may cooperate to define a first set of fluid chambers. The second stator may be fixed for rotation with the first rotor and the first shaft. The second rotor may be coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator. The second rotor and the second stator may cooperate to define a second set of fluid chambers. | 09-15-2011 |
| 20110220049 | ENGINE HAVING CAMSHAFT LUBRICATION RAIL - An engine assembly may include a cylinder head defining a first bearing surface supporting a camshaft, a bearing cap fixed to the cylinder head and a lubrication rail. The first bearing surface may have a first oil inlet extending therethrough. The camshaft may define an axial bore, a first radial passage and a second radial passage. The first radial passage may extend from the axial bore through an outer circumference of the camshaft and may be in communication with the first oil inlet. The second radial passage may extend from the axial bore through an outer circumference of the camshaft. The bearing cap may be fixed to the cylinder head and include a first oil outlet in communication with the second radial passage. The lubrication rail may include a second oil inlet in communication with the first oil outlet and a first lubrication supply passage aligned with a camshaft lobe. | 09-15-2011 |
