초록 ▼

Internal combustion engines are described including a crankshaft and at least one cylinder, an intake line for supplying air to the cylinder, an exhaust line for discharging exhaust gases from the cylinder, a recirculation line for recirculating at least a portion of the exhaust gases from the exhau

Internal combustion engines are described including a crankshaft and at least one cylinder, an intake line for supplying air to the cylinder, an exhaust line for discharging exhaust gases from the cylinder, a recirculation line for recirculating at least a portion of the exhaust gases from the exhaust line to the intake line in order to reduce emissions from the engine, a valve in the recirculation line for controlling the flow of a portion of the exhaust gases therethrough, a turbocharger including a first turbocharging unit for absorbing energy from the exhaust gases and including a compressor to compress air supply to the intake line, and a second turbocharger unit disposed downstream of the first turbocharger unit for absorbing energy from the exhaust gases whereby a pressure is created in the exhaust line which is greater than the pressure in the intake line, and a power transmission line for transmitting power from the second turbocharger unit to the crankshaft. Methods for reducing emissions from internal combustion engines are also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.]1. An internal combustion engine comprising a crankshaft and at least one cylinder, an intake line for supplying air to said at least one cylinder, an exhaust line for discharging exhaust gases from said at least one cylinder, a recirculation line for recirculating at leas

[ What is claimed is:] [1.]1. An internal combustion engine comprising a crankshaft and at least one cylinder, an intake line for supplying air to said at least one cylinder, an exhaust line for discharging exhaust gases from said at least one cylinder, a recirculation line for recirculating at least a portion of said exhaust gases from said exhaust line to said intake line for reducing emissions from said internal combustion engine, a valve disposed in said recirculation line for controlling the flow of said at least a portion of said exhaust gases therethrough, a turbocharger associated with said exhaust line including a first turbocharger unit for absorbing energy from said exhaust gases and including compressing means for compressing air supplied to said intake line, and a second turbocharger unit disposed downstream of said first turbocharger unit for absorbing energy from said exhaust gases, whereby a pressure is created in said exhaust line which is greater than the pressure in said intake line, and power transmission means for transmitting power from said second turbocharger unit to said crankshaft.