Patent ID: 9194304
Filing Date: 2015-11-24
Classification: F01D,F02B,F02D,F05D,Y02T

Abstract:
1. An engine braking system comprising: an internal combustion engine with an air intake path and an exhaust gas path; a turbocharger comprising a compressor for delivering pressurised air to the air intake path and a turbine for receipt of the exhaust gas from the engine, the turbine comprising a turbine wheel rotatably disposed in a turbine housing, the compressor comprising a compressor impeller rotatably disposed in a compressor housing, the turbine wheel and compressor impeller being connected by a turbocharger shaft, a bearing housing disposed between the compressor and turbine for housing a bearing assembly to support the turbocharger shaft in rotation, at least one first seal between the shaft and a compressor end of the bearing housing; an exhaust gas brake in the exhaust gas path and operable to effect engine braking, an exhaust gas bleed path extending from the exhaust gas path to a jet pump in fluid communication with the bearing housing.