Claims:
We Claim

1. An exhaust gas circulation system, said exhaust gas circulation system comprising:
a turbocharger, said turbocharger comprising a turbine and a compressor that is driven by the turbine;
a bypass flow path comprising an upstream end and a downstream end, the upstream end positioned at an outlet of said compressor and adapted to receive compressed air that is discharged from said compressor, and a control flow valve in flow communication with the bypass flow path and adapted to regulate a flow of compressed air that is discharged from the outlet of said compressor through the bypass flow path; characterized in that
the downstream end of the bypass flow path secured to a dosing module and in flow communication with said dosing module, said bypass flow path adapted to deliver compressed air that is discharged from said compressor of said turbocharger to the dosing module to facilitate delivering a reducing agent from said dosing module to an exhaust gas flow path of said exhaust gas circulation system.

2. A bypass flow path for an exhaust gas circulation system, said bypass flow path comprising:
an upstream end and a downstream end, the upstream end positioned at an outlet of a compressor of a turbocharger and adapted to receive compressed air that is discharged from said compressor, and a control flow valve in flow communication with the bypass flow path and adapted to regulate a flow of compressed air that is discharged from the outlet of said compressor through the bypass flow path; characterized in that
the downstream end of the bypass flow path secured to a dosing module and in flow communication with said dosing module, the bypass flow path adapted to deliver compressed air that is discharged from said compressor of said turbocharger to the dosing module to facilitate delivering a reducing agent from said dosing module to an exhaust gas flow path of said exhaust gas circulation system.
, Description:Complete Specification:

The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001] This invention relates to a bypass flow path, and more specifically to a bypass flow path that is secured to a dosing module of an exhaust gas circulation system.

Background of the invention
[0002] EP 1550796 A1 describes a method for controlling the temperature of the exhaust gases in a turbocharged engine, in which the air is picked up from the supply line and injected into the exhaust gas line upstream of a catalytic system for reducing the nitrogen oxide content, for example upstream of the turbine in the turbocharger. The air flow rate is controlled according to the temperature that is required by means of a control valve. Engine apparatus comprising a bypass line that connects the intake line to the exhaust line bypassing the engine.

Brief description of the accompanying drawing
[0003] Figure 1 illustrates a schematic diagram of a bypass flow path that is secured to a dosing module of an exhaust gas circulation system.

Detailed description of the embodiments
[0004] Figure 1 illustrates an exhaust gas circulation system. The exhaust gas circulation system comprises a turbocharger, the turbocharger comprising a turbine and a compressor that is driven by the turbine. A bypass flow path comprises an upstream end and a downstream end, the upstream end positioned at an outlet of the compressor and adapted to receive compressed air that is discharged from the compressor. A control flow valve is in flow communication with the bypass flow path and is adapted to regulate a flow of compressed air that is discharged from the outlet of the compressor through the bypass flow path. The downstream end of the bypass flow path is secured to a dosing module and in flow communication with the dosing module. The bypass flow path is adapted to deliver compressed air that is discharged from the compressor of the turbocharger to the dosing module to facilitate delivering a reducing agent from the dosing module to an exhaust gas flow path of the exhaust gas circulation system.

[0005] The exhaust gas circulation system comprises a turbocharger that is in flow communication with a fuel inlet supply path and an exhaust gas supply path respectively. More specifically, the turbocharger comprises a turbine and a compressor that is driven by the turbine. The air entering the compressor from an air inlet supply path is compressed by the compressor and delivered to an engine. A bypass flow path comprises an upstream end and a downstream end. The upstream end of the bypass flow path is positioned at an outlet of the compressor and is adapted to receive compressed air that is discharged from the compressor.

[0006] In an exemplary embodiment, a control flow valve is in flow communication with the bypass flow path and is adapted to regulate a flow of compressed air that is discharged from the outlet of the compressor through the bypass flow path. More specifically, an engine control unit is in electronic communication with the control flow valve and is adapted to regulate a pre-determined quantity of compressed air that is discharged from the outlet of the compressor through the bypass flow path as is required at a downstream end of the bypass flow path. In the exemplary embodiment, depending on a required volume of compressed air at a downstream end of the bypass flow path, the engine control unit is used to vary the opening percentage of the control flow valve to facilitate regulating the pre-determined quantity of compressed air that is discharged from the outlet of the compressor through the bypass flow path.

The downstream end of the bypass flow path is secured to a dosing module and in flow communication with the dosing module. The bypass flow path is adapted to deliver compressed air that is discharged from the compressor of the turbocharger to the dosing module to facilitate delivering a reducing agent from the dosing module to an exhaust gas flow path of the exhaust gas circulation system.

[0008] It must be understood that the embodiments explained above are only illustrative and do not limit the scope of the disclosure. Many modifications in the embodiments with regard to dimensions of various components are envisaged and form a part of this invention. The scope of the invention is only limited by the scope of the claims.