Low-pressure egr system with turbo bypass

Abstract

The invention relates to a gasoline engine (2) comprising an exhaust gas line (2.3) which can be connected to an exhaust manifold (2.1) of the gasoline engine (2), an intake line (2.4) which can be connected to an intake manifold (2.2) of the gasoline engine (2), a charge air compressor (4) which is arranged in the intake line (2.4), and a turbine (3) which is arranged in the exhaust gas line (2.3). The exhaust gas line (2.3) has at least one bypass line (1.1) with a bypass throttle valve (1.4), the line branching off from the exhaust gas line (2.3) at a branch (1.1) upstream of the turbine (3) and branching back into the exhaust gas line (2.3) at an opening (1.1b) downstream of the turbine (3). At least one exhaust gas recirculation line (1.5) with an EGR throttle valve (1.3) is provided,said line branching off from the exhaust gas line (2.3) at a branch (1.5a) and opening into the intake line (2.4) at an opening (1.5b), wherein a coupling line (1.7) with a first node point (1.7a) and a second node point (1.7b) is provided, the bypass line (1.1) and the EGR line (1.5) being combined in some sections in said coupling line; at least one particle filter (1.2) is arranged in the coupling line (1.7); and the first node point (1.7a) is arranged downstream of the branch (1.5a) and downstream of the branch (1.1).

Description

technical field [0001] The invention relates to an exhaust gas conduction system for a gasoline engine, comprising: an exhaust pipeline connectable to an exhaust manifold of a gasoline engine, an intake pipeline connectable to an intake manifold of a gasoline engine, A booster air compressor in the air line and a turbine arranged in the exhaust line, wherein the exhaust line includes at least one bypass line with a bypass throttle valve, the bypass line in the A branch upstream of the turbine is branched from the exhaust line and branched back to the exhaust line at an opening downstream of the turbine; the exhaust gas conduction system also includes an EGR throttle valve at least one exhaust gas recirculation line, which branches off from the exhaust line at a branch and leads to the intake line at an opening, wherein the exhaust gas conduction system also includes a first A coupling line of a node and a second node, the bypass line and the exhaust gas recirculation line are...

AI Technical Summary

Problems solved by technology

Since most gasoline engines run stoichiometrically, the oxygen content in the exhaust may be too low to adequately burn the mass of particles contained in the filter

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