Supercharging system for engine

• US 9,322,362 B2
• Filed: 11/06/2013
• Issued: 04/26/2016
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Lim, Hyun Jun, Han, Dong Hee, Kim, Yoon Joo, Jeun, Jaeyoung, Han, Seung Kook, Park, Jong Il
• Primary Examiner(s): Trieu, Thai Ba
• Assistant Examiner(s): Nguyen, Ngoc T
• Application Number:
  US14/073,655
• Publication Number:
  US 20140238016A1
• Time in Patent Office: 902 Days
• Field of Search: 606/11, 606/06, 606/02, 606/07, 606/052, 606/12, 602/78, 602/89, 603/04, 123/568.11
• US Class Current: 1/1
• CPC Class Codes: F02B 33/40 of non-positive-displacement type
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: F02M 26/05 High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
• CPC Class Codes: F02M 26/08 for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
• CPC Class Codes: F02M 26/22 with coolers in the recirculation passage
• CPC Class Codes: F02M 26/65 Constructional details of EGR valves
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A supercharging system for an engine includes: a cylinder block forming a combustion chamber; an intake manifold connected to the cylinder block to supply ambient air thereto; an exhaust manifold collecting exhaust gas discharged from the combustion chamber and guiding the same to the environment; a third supercharge path connecting an inlet of the intake manifold to the exhaust manifold; and an electric supercharger supplying compressed air to the exhaust manifold through the third supercharge path. Responsiveness of an engine is enhanced and stabilization of the engine is promoted.

Claims

1. A supercharging system for an engine, comprising:

a cylinder block including a combustion chamber;

an intake manifold connected to the cylinder block to supply ambient air thereto;

an exhaust manifold collecting exhaust gas discharged from the combustion chamber and guiding the exhaust gas to an environment;

a first supercharge path connecting an inlet of the intake manifold to the exhaust manifold;

an electric supercharger supplying compressed air to the exhaust manifold through the first supercharge path; and

a recirculation valve mounted to a second supercharge path and discharging a portion of compressed air within the second supercharge path to the environment, wherein an end of the second supercharge path is connected to the intake manifold,

wherein;

a pressure sensor sensing pressure of the second supercharge path is provided; and

an engine control unit controlling the recirculation valve and the bypass valve by detecting pressure of the second supercharge path is provided.

2. The supercharging system of claim 1, wherein when the pressure of the second supercharge path sensed by the pressure sensor is higher than a pre-set pressure, the engine control unit controls the recirculation valve to be opened to discharge the compressed air within the second supercharge path to the environment.

3. The supercharging system of claim 2, wherein the engine control unit sequentially performs:

controlling the electric supercharger to be operated to compress air flowing therein and controlling the air control valve to be opened and the bypass valve to be closed when the compressed air is supplied by the electric supercharger;

controlling the air control valve to be closed and the bypass valve to be opened after a predetermined time elapses after the compressed air is supplied and controlling the electric supercharger to be turned off when the bypass valve is opened;

sensing pressure of the second supercharge path by the pressure sensor after the electric supercharger is turned off; and

controlling opening and closing of the recirculation valve according to the pressure sensed by the pressure sensor when the sense pressure is higher than a pre-set pressure.

4. A supercharging system for an engine, comprising:

a cylinder block including a combustion chamber;

an intake manifold connected to the cylinder block to supply ambient air thereto;

an exhaust manifold collecting exhaust gas discharged from the combustion chamber and guiding the exhaust gas to an environment;

a first supercharge path connecting an inlet of the intake manifold to the exhaust manifold;

an electric supercharger supplying compressed air to the exhaust manifold through the first supercharge path; and

a recirculation valve mounted to a second supercharge path and discharging a portion of compressed air within the second supercharge path to the environment, wherein an end of the second supercharge path is connected to the intake manifold,

a turbo charger compressing ambient air by using pressure of exhaust gas discharged from the combustion chamber and supplying compressed air to the combustion chamber;

an intercooler cooling the compressed air supplied from the turbo charger to the combustion chamber;

a third supercharge path connecting the turbo charger and the intercooler;

the second supercharge path connecting the intercooler and the intake manifold;

wherein the electric supercharger is connected to the second supercharge path, and

wherein;

an intake path allowing ambient air to flow therein is connected to the turbo charger;

an air cleaner filtering foreign materials included in the ambient air is installed in the intake path;

an opening and closing valve opening and closing the intake path is installed;

a recirculation path allowing a partial amount of exhaust gas discharged through the exhaust manifold to be introduced to the intake path, is connected to the intake path;

an Exhaust Gas Recirculation (EGR) cooler cooling exhaust gas is installed in the recirculation path; and

a control valve controlling exhaust gas introduced to the intake path through the recirculation path is provided.

5. The supercharging system of claim 4, wherein the control valve and the opening and closing valve constitute an integrated valve unit.

6. A supercharging system for an engine, comprising:

a cylinder block including a combustion chamber;

an intake manifold connected to the cylinder block to supply ambient air thereto;

an exhaust manifold collecting exhaust gas discharged from the combustion chamber and guiding the exhaust gas to an environment;

a first supercharge path connecting an inlet of the intake manifold to the exhaust manifold;

an electric supercharger supplying compressed air to the exhaust manifold through the first supercharge path;

a recirculation valve mounted to a second supercharge path and discharging a portion of compressed air within the second supercharge path to the environment, wherein an end of the second supercharge path is connected to the intake manifold;

a turbo charger compressing ambient air by using pressure of exhaust gas discharged from the combustion chamber and supplying compressed air to the combustion chamber;

an intercooler cooling the compressed air supplied from the turbo charger to the combustion chamber;

a third supercharge path connecting the turbo charger and the intercooler;

the second supercharge path connecting the intercooler and the intake manifold;

wherein the electric supercharger is connected to the second supercharge path;

a bypass valve opening and closing the second supercharge path;

wherein;

an inlet of the electric supercharger is connected to the second supercharge path between the bypass valve and the intercooler; and

an outlet of the electric supercharger is connected to the second supercharge path between the bypass valve and the intake manifold.

7. The supercharging system of claim 6, further comprising:

an air control valve installed in the first supercharge path in order to control supply of compressed air supplied to the exhaust manifold through the first supercharge path.

8. The supercharging system of claim 6, wherein

an intake path allowing ambient air to flow therein is connected to the turbo charger;

an air cleaner filtering foreign materials included in the ambient air is installed in the intake path;

an opening and closing valve opening and closing the intake path is installed;

a recirculation path allowing a partial amount of exhaust gas discharged through the exhaust manifold to be introduced to the intake path, is connected to the intake path;

an Exhaust Gas Recirculation (EGR) cooler cooling exhaust gas is installed in the recirculation path; and

a control valve controlling exhaust gas introduced to the intake path through the recirculation path is provided.

9. The supercharging system of claim 8, wherein the control valve and the opening and closing valve constitute an integrated valve unit.

10. The supercharging system of claim 6, wherein

a pressure sensor sensing pressure of the second supercharge path is provided;

and

an engine control unit controlling the recirculation valve and the bypass valve by detecting pressure of the second supercharge path is provided.

11. The supercharging system of claim 10, wherein when the pressure of the second supercharge path sensed by the pressure sensor is higher than a pre-set pressure, the engine control unit controls the recirculation valve to be opened to discharge the compressed air within the second supercharge path to the environment.

12. The supercharging system of claim 11, wherein the engine control unit sequentially performs:

controlling the electric supercharger to be operated to compress air flowing therein and controlling the air control valve to be opened and the bypass valve to be closed when the compressed air is supplied by the electric supercharger;

controlling the air control valve to be closed and the bypass valve to be opened after a predetermined time elapses after the compressed air is supplied and controlling the electric supercharger to be turned off when the bypass valve is opened;

sensing pressure of the second supercharge path by the pressure sensor after the electric supercharger is turned off; and

controlling opening and closing of the recirculation valve according to the pressure sensed by the pressure sensor when the sense pressure is higher than a pre-set pressure.