Methods and systems are provided for a compressor of a turbocharger of an engine. In one example, a compressor may include a flow passage and a resonance chamber surrounding the flow passage, with the flow passage fluidly coupled with the resonance chamber by a recirculation passage, a bleed passage, and a plurality of apertures positioned between the recirculation passage and the bleed passage. Flowing fluid from the resonance chamber, through the apertures, and into the flow passage may reduce a noise level of the compressor.

The present disclosure provides an engine system of a vehicle including an engine having combustion chambers for generating driving torque by burning fuel; an intake line in which fresh air flowing into the combustion chambers flows; an exhaust line in which exhaust gas exhausted from the combustion chambers flows; a recirculation line connecting the exhaust line and the intake line; a turbocharger including a turbine disposed at the exhaust line and rotated by the exhaust gas from the combustion chambers, and a compressor disposed at the intake line and rotated together with the turbine and compressing fresh air; an exhaust gas recirculation valve disposed at the connection of the recirculation line and the intake line to adjust an exhaust gas recirculation gas amount supplied to the intake line through the recirculation line; and a remaining gas elimination apparatus for supplying gas remaining in the intake line to the recirculation line.

The present disclosure provides an engine system of a vehicle including an engine having combustion chambers for generating driving torque by burning fuel; an intake line in which fresh air flowing into the combustion chambers flows; an exhaust line in which exhaust gas exhausted from the combustion chambers flows; a recirculation line connecting the exhaust line and the intake line; a turbocharger including a turbine disposed at the exhaust line and rotated by the exhaust gas from the combustion chambers, and a compressor disposed at the intake line and rotated together with the turbine and compressing fresh air; an exhaust gas recirculation valve disposed at the connection of the recirculation line and the intake line to adjust an exhaust gas recirculation gas amount supplied to the intake line through the recirculation line; and a remaining gas elimination apparatus for supplying gas remaining in the intake line to the recirculation line.

A control device for a compression self-ignition combustion engine is provided, which includes a variable valve operating system configured to introduce internal exhaust gas recirculation (EGR) gas into a combustion chamber, a boosting system configured to boost intake air, a controller configured to control the valve operating system, and a sensor connected to the controller and configured to detect a parameter related to an operating state of the engine. An operation mode of the valve operating system is switchable between first and second modes. The boosting system boosts the intake air when an engine load is higher than a given load, and does not boost when lower than the given load. When the engine load is high, the controller controls the valve operating system to operate in the first mode, and when the load is low, the controller controls the valve operating system to operate in the second mode.

A control device for a compression self-ignition combustion engine is provided, which includes a variable valve operating system configured to introduce internal exhaust gas recirculation (EGR) gas into a combustion chamber, a boosting system configured to boost intake air, a controller configured to control the valve operating system, and a sensor connected to the controller and configured to detect a parameter related to an operating state of the engine. An operation mode of the valve operating system is switchable between first and second modes. The boosting system boosts the intake air when an engine load is higher than a given load, and does not boost when lower than the given load. When the engine load is high, the controller controls the valve operating system to operate in the first mode, and when the load is low, the controller controls the valve operating system to operate in the second mode.

The present invention relates to a hybrid system comprising a supercharging system for an internal combustion engine (1), the hybrid system comprising: a charging device (6) with a turbine (7) connected to a compressor (8) via a compressor shaft (9), the compressor having a high speed shaft (30); a planetary gear (25) coupled between the high speed shaft (30) and an electric motor/generator (20); a clutch (18a); and a power transmission for connecting a crank shaft (4) of the combustion engine (1) to the electric motor/generator (20) via the clutch (18a); wherein the hybrid system further comprises a system control (23) configured to operate the hybrid system in different operating modes according to a control sequence based on one, or a plurality of, input parameters representative of operational properties of the hybrid system.

The present invention relates to a hybrid system comprising a supercharging system for an internal combustion engine (1), the hybrid system comprising: a charging device (6) with a turbine (7) connected to a compressor (8) via a compressor shaft (9), the compressor having a high speed shaft (30); a planetary gear (25) coupled between the high speed shaft (30) and an electric motor/generator (20); a clutch (18a); and a power transmission for connecting a crank shaft (4) of the combustion engine (1) to the electric motor/generator (20) via the clutch (18a); wherein the hybrid system further comprises a system control (23) configured to operate the hybrid system in different operating modes according to a control sequence based on one, or a plurality of, input parameters representative of operational properties of the hybrid system.

A bearing housing for a turbocharger is disclosed. The bearing housing includes a first end proximate to a turbine wheel of the turbocharger and a second end proximate to a compressor wheel of the turbocharger. The bearing housing further includes a central chamber disposed between the first end and the second end and configured to house, at least, the shaft. The bearing housing further includes an oil drain disposed radially outward of the shaft and configured for directing oil out of the bearing housing and an oil core disposed radially outward of the shaft and radially inward of the oil drain, the oil core configured for communicating oil towards the oil drain and having an inner wall. The bearing housing includes one or more strakes protruding radially inward from the inner wall, the one or more strakes configured to direct oil within the oil core towards the oil drain.

A bearing housing for a turbocharger is disclosed. The bearing housing includes a first end proximate to a turbine wheel of the turbocharger and a second end proximate to a compressor wheel of the turbocharger. The bearing housing further includes a central chamber disposed between the first end and the second end and configured to house, at least, the shaft. The bearing housing further includes an oil drain disposed radially outward of the shaft and configured for directing oil out of the bearing housing and an oil core disposed radially outward of the shaft and radially inward of the oil drain, the oil core configured for communicating oil towards the oil drain and having an inner wall. The bearing housing includes one or more strakes protruding radially inward from the inner wall, the one or more strakes configured to direct oil within the oil core towards the oil drain.

An object is to provide a floating bush bearing device including a circumferential groove over the entire circumference of an outer peripheral surface of a floating bush while ensuring that a pressing force is applied by lubricant oil to the floating bush to reduce oscillation, as well as a turbocharger provided with the bearing device. A floating bush bearing device includes: a rotary shaft disposed rotatably inside a bearing hole of a casing; a floating bush surrounding the rotary shaft; an oil-feed hole of lubricant oil having an opening on an inner peripheral surface of the bearing hole; a plurality of communication holes formed on the floating bush, each extending between an inner peripheral surface and an outer peripheral surface of the floating bush, and disposed at intervals in a circumferential direction of the floating bush; and a circumferential groove formed on the outer peripheral surface of the floating bush or the inner peripheral surface of the bearing hole and extending over an entire circumference of the outer peripheral surface of the floating bush or the inner peripheral surface of the bearing hole, the circumferential groove passing through openings of the plurality of communication holes or facing the openings of the plurality of communication holes. The circumferential groove has a cross-sectional area which varies in accordance with a circumferential position.