Secondary air injection system

• US 10,655,576 B2
• Filed: 10/04/2018
• Issued: 05/19/2020
• Est. Priority Date: 04/17/2018
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Oh, Heechang, Park, Jong Il, Hong, Seungwoo, Park, Yeongseop, Han, Dong Hee, Lee, Hyungbok
• Primary Examiner(s): Trieu, Thai Ba
• Assistant Examiner(s): Singh, Dapinder
• Application Number:
  US16/151,676
• Publication Number:
  US 20190316551A1
• Time in Patent Office: 593 Days
• Field of Search: 60602, 606052, 60280, 60287, 60288, 60289, 60290, 60299-301
• CPC Class Codes: F01N 13/10 of exhaust manifolds with cooling jacket F01N3/046
• CPC Class Codes: F01N 3/30 Arrangements for supply of additional air control, e.g. using by-passes or variable air pump drives, F01N3/22
• CPC Class Codes: F02B 29/04 Cooling of air intake supply
• 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: F02D 2200/08 Exhaust gas treatment apparatus parameters
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: F02D 41/005 according to engine operating conditions
• CPC Class Codes: F02D 41/0055 Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
• CPC Class Codes: F02D 41/025 by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus
• CPC Class Codes: F02M 26/03 with a single mechanically or electrically driven intake charge 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 26/14 in relation to the exhaust system
• CPC Class Codes: F02M 26/21 with EGR valves located at or near the connection to the intake system
• CPC Class Codes: F02M 26/65 Constructional details of EGR valves
• CPC Class Codes: F02M 35/10006 characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
• CPC Class Codes: F02M 35/10157 Supercharged engines
• CPC Class Codes: F02M 35/10222 Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
• CPC Class Codes: F02M 35/10229 the intake system acting as a vacuum or overpressure source for auxiliary devices, e.g. brake systems; Vacuum chambers air storage chamber F02B21/00
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 : Improving ICE efficiencies
• CPC Class Codes: Y02T 10/40 : Engine management systems

Abstract

A secondary air injection system may include an engine that includes a plurality of cylinders that generate a driving torque of a vehicle by combustion of a fuel; a main line connected to an exhaust manifold or an exhaust line which is connected to the plurality of cylinders; a recirculation line which is branched from the main line and then connected to an intake manifold; an air injection line which is branched from the main line and then connected to an intake line; and an electric supercharger which is provided in the intake line.

Claims

1. A secondary air injection system comprising:

an engine including at least a cylinder that generates a driving torque of a vehicle by combustion of a fuel;

a main line which is connected to at least one of an exhaust manifold and an exhaust line which is connected to the at least a cylinder;

a recirculation line which is branched from the main line and connected to an intake manifold;

an air injection line which is branched from the main line and connected to an intake line connected to the intake manifold;

a bypass line which is branched from a first side of the intake line and connected to a second side of the intake line;

an electric supercharger provided in the intake line;

a recirculation valve which is provided in the recirculation line and controls an amount of recirculation gas recirculated through the main line and the recirculation line;

a three-way air amount control valve which is provided at a location where the air injection line and the intake line are connected and controls an air amount injected to the at least one of the exhaust manifold and the exhaust line through the air injection line and the main line; and

a bypass valve provided in the bypass line.

2. The secondary air injection system of claim 1, Wherein the air injection line is connected to the intake line at a downstream side of the electric supercharger.

3. The secondary air injection system of claim 1, wherein, when exhaust gas recirculation is required, the three-way air amount control valve is opened such that the intake line and the air injection line are blocked, and the recirculation valve is opened such that an exhaust gas is supplied to the intake manifold from the at least one of the exhaust manifold and the exhaust line, according a signal of a controller.

4. The secondary air injection system of claim 1, wherein, when secondary air injection is required,

the recirculation valve is closed, and the three-way air amount control valve is opened such that the intake line and the air injection line fluidically-communicate with each other and the intake line is blocked by the three-way air amount control valve, and the electric supercharger operates to inject air to the at least one of the exhaust manifold and the exhaust line, from the intake line, according a signal of a controller.

5. The secondary air injection system of claim 4, wherein the bypass valve is opened, according the signal of the controller, when secondary air injection is required.

6. The secondary air injection system of claim 1, further including an exhaust gas purification device which is provided in the exhaust line to purify the exhaust gas.

7. The secondary air injection system of claim 6, further including an exhaust gas purification. device which is provided in the exhaust line to purify the exhaust gas.

8. A secondary air injection system comprising:

an engine including at least a cylinder that generates a driving torque of a vehicle by combustion of a fuel;

a main line which is connected to at least one of an exhaust manifold and an exhaust line which is connected to the at least a cylinder;

a turbocharger including a turbine which is provided in the exhaust line and rotates by an exhaust gas flowing through the exhaust line and a compressor which is provided in an intake line and rotates by a torque of the turbine to compress intake air flowing through the intake line connected to an intake manifold;

a recirculation line which is branched from the main line and connected to the intake line at an upstream side of the compressor;

an air injection line which is branched from the main line and connected to the intake line at a downstream side of the compressor;

a bypass line which is branched from a first side of the intake line and connected to a second side of the intake line;

an electric supercharger which is provided in the intake line;

a. recirculation valve which is provided in the recirculation line to control an amount of a recirculation has recirculated through the main line and the recirculation line;

a three-way air amount control valve which is provided at location where the air injection line and the intake fine are connected and controls an air amount injected to the at least one of the exhaust manifold and the exhaust line through the air injection line and the main line; and

a bypass valve provided in the bypass line.

9. The secondary air injection system of claim 8, wherein, when exhaust gas recirculation is required,

the three-way air amount control valve is opened such that the intake line and the air injection line are blocked, and the recirculation valve is opened such that an exhaust gas is supplied to the intake manifold from the at least one of the exhaust manifold and the exhaust line, according a signal of a controller.

10. The secondary air injection system of claim 8, wherein, when secondary air injection is required,

the recirculation valve is closed, and the three-way air amount control valve is opened such that the intake line and the air injection line fluidically-communicate with each other and the intake line is blocked by the three-way air amount control valve, and the electric supercharger operates to inject air to the at least one of the exhaust manifold and the exhaust line from the intake line, according a signal of a controller.

11. The secondary air injection system of claim 10, wherein the bypass valve is opened, according the signal of the controller, when secondary air injection is required.