Abstract: An oil pump for an engine is disclosed. The oil pump may include a first pump mechanism configured to supply oil to a main lubrication gallery of the engine, and a second pump mechanism configured to supply oil to a piston cooling gallery of the engine. The first pump mechanism may be designed for a first type of engine and the second pump mechanism may be designed for a second type of engine. The first type of engine may have a greater quantity of cylinders than the second type of engine.

Abstract: An oil pump for an engine is disclosed. The oil pump may include a first pump mechanism configured to supply oil to a main lubrication gallery of the engine, and a second pump mechanism configured to supply oil to a piston cooling gallery of the engine. The first pump mechanism may be designed for a first type of engine and the second pump mechanism may be designed for a second type of engine. The first type of engine may have a greater quantity of cylinders than the second type of engine.

Abstract: An EGR cooler may include an EGR cooler housing having top, bottom and side walls, inlet and outlet end walls disposed at opposite ends, and a longitudinal axis extending in a direction of exhaust gas flow from the inlet end to the outlet end. A plurality of cooling tubes extend through the EGR cooler between the top and bottom walls, and are arranged in a cooling tube array to form an exhaust gas receiving area at an upstream side of the cooling tube array proximate the inlet end wall so that exhaust gas flowing into the EGR cooler through an exhaust gas inlet opening will flow into the exhaust gas receiving area and then disperse through the cooling tube array. A pitch distance between the cooling tubes may be greater proximate the longitudinal axis than proximate the side walls to promote flow through, instead of around, the cooling tube array.

Abstract: A valvetrain for an engine includes a pair of valves that are disposed in a spaced apart relation to one another, and in which each of the valves has an elongated valve stem. The valvetrain further includes a valve bridge that is coupled to the pair of valves. The valve bridge is configured to define a pair of receptacles to at least partly receive the pair of valve stems therein. The valve bridge further defines a central recess that is located midway between the pair of receptacles and disposed in a co-planar relationship with the pair of receptacles.

Abstract: An EGR cooler may include an EGR cooler housing having top, bottom and side walls, inlet and outlet end walls disposed at opposite ends, and a longitudinal axis extending in a direction of exhaust gas flow from the inlet end to the outlet end. A plurality of cooling tubes extend through the EGR cooler between the top and bottom walls, and are arranged in a cooling tube array to form an exhaust gas receiving area at an upstream side of the cooling tube array proximate the inlet end wall so that exhaust gas flowing into the EGR cooler through an exhaust gas inlet opening will flow into the exhaust gas receiving area and then disperse through the cooling tube array. A pitch distance between the cooling tubes may be greater proximate the longitudinal axis than proximate the side walls to promote flow through, instead of around, the cooling tube array.

Abstract: A valve bridge is disclosed for use with an internal combustion engine. The valve bridge may include a body with a central cavity formed in a center portion of the body for receiving a hydraulic lash adjuster, and opposing first and second lateral extensions on opposite sides of the central cavity. The valve bridge may further include a first bore in the first extension for receiving a first valve stem, and a second bore in the second extension for receiving a second valve stem. The valve bridge may also include a first internal groove in a wall of the central cavity configured to receive fluid, as well as a first internal passage in the body that extends from the first internal groove toward the first bore. In addition, the first internal passage may extend from a higher gravitational point within the body to a lower gravitational point within the body.

Abstract: A method for controlling engine operations, is provided herein. The engine includes at least a first bank having a first cylinder and a second cylinder associated with at least a turbocharger or an exhaust gas recirculation system. Each of the first and the second cylinder has a respective intake valve. The method determines an exhaust back pressure for each one of the first and the second cylinder. Further, the method determines an intake mass flow rate for each one of the first and the second cylinder based at least on the determined exhaust back pressure for the respective first and the second cylinder. The method adjusts a time duration of an open position of the respective intake valve for each one of the first and the second cylinder based on the determined intake mass flow rate for the corresponding first and the second cylinder.

Abstract: A valve bridge for a valve system of an engine includes one or more valves and a valve rotator coupled to the valves. The valve bridge includes one or more end portions, a seat formed at the one or more end portions to receive the one or more valves, and an extension portion that extends outwardly from the one or more end portions. The extension portion defines a cavity configured to accommodate the valve rotator, and guide the valve bridge with the valve rotator during each opening and closing of the one or more valves relative to the engine.

Abstract: A valvetrain for an engine includes a pair of valves that are disposed in a spaced apart relation to one another, and in which each of the valves has an elongated valve stem. The valvetrain further includes a valve bridge that is coupled to the pair of valves. The valve bridge is configured to define a pair of receptacles to at least partly receive the pair of valve stems therein. The valve bridge further defines a central recess that is located midway between the pair of receptacles and disposed in a co-planar relationship with the pair of receptacles.

Abstract: A valve bridge is disclosed for use with an internal combustion engine. The valve bridge may include a body with a central cavity formed in a center portion of the body for receiving a hydraulic lash adjuster, and opposing first and second lateral extensions on opposite sides of the central cavity. The valve bridge may further include a first bore in the first extension for receiving a first valve stem, and a second bore in the second extension for receiving a second valve stem. The valve bridge may also include a first internal groove in a wall of the central cavity configured to receive fluid, as well as a first internal passage in the body that extends from the first internal groove toward the first bore. In addition, the first internal passage may extend from a higher gravitational point within the body to a lower gravitational point within the body.

Abstract: A multi-cylinder engine including a donor cylinder, a non-donor cylinder, at least one intake manifold, and at least one camshaft is provided. An intake valve of the donor cylinder controls a flow of air into the donor cylinder. The donor cylinder fluidly communicates exhaust gases to an exhaust gas recirculation (EGR) system. An intake valve of the non-donor cylinder controls a flow of air into the non-donor cylinder. The at least one camshaft controls an opening and closing of the intake valve of the non-donor cylinder such that the intake valve of the non-donor cylinder is maintained open for a first intake duration. The at least one camshaft controls an opening and closing of the intake valve of the donor cylinder such that the at least one intake valve of the donor cylinder is maintained open for a second intake duration which is greater than the first intake duration.

Abstract: A self-cleaning exhaust gas recirculation (EGR) cooler system of an engine is disclosed. The self-cleaning EGR cooler system includes an exhaust gas recirculation cooler, a controller, a four-way valve, and a three-way valve. The EGR cooler is disposed downstream of an exhaust manifold. The four-way valve is positioned between the exhaust manifold and the EGR cooler. The three-way valve is positioned between the EGR cooler and an intake air conduit. The controller selectively operates the four-way valve, and the three-way valve, which in operates the EGR cooler, to work in a normal flow state and a reverse flow state based on a current throttle position. Particulate matter deposited at the second end of the EGR cooler during the normal flow state, is removed by an exhaust stream entering from the second end during the reverse flow state and vice versa.