Engine system

Patent metadata

Field	Value
Publication number	US-10837412-B2
Application number	US-201816206565-A
Country	US
Kind code	B2
Filing date	Nov 30, 2018
Priority date	Sep 17, 2018
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An engine system may include an engine including a plurality of combustion chambers for generating a driving force by combustion of fuel, an exhaust gas purification device mounted in an exhaust line through which exhaust gas discharged from the combustion chamber flows, an EGR gas collecting device configured for collecting a part of the exhaust gas from an exhaust manifold of the engine and supplying the exhaust gas to an intake manifold of the engine, and an EGR gas supply control valve provided between the EGR gas collecting device and the intake manifold and adapted to regulate a flow rate of EGR gas supplied to the intake manifold.

First claim

What is claimed is:

1. An engine system, comprising:
an engine including a plurality of combustion chambers for generating a driving force by combustion of fuel, and an intake manifold and an exhaust manifold fluidically-connected to the plurality of combustion chambers, wherein an exhaust line is connected to the exhaust manifold;
an exhaust gas purifying device mounted in the exhaust line through which exhaust gas discharged from the plurality of combustion chambers flows;
an exhaust gas recirculation (EGR) collecting device connected to the exhaust manifold and the intake manifold and configured for collecting a portion of the exhaust gas from the exhaust manifold of the engine and supplying the collected exhaust gas to the intake manifold of the engine;
an EGR gas supply control valve mounted between the EGR collecting device and the intake manifold and configured to regulate a flow rate of EGR gas supplied to the intake manifold; and
a plurality of EGR exhaust passages branched from the plurality of combustion chambers adjacent to the exhaust manifold and coupled to an inlet of the EGR collecting device,
wherein an EGR exhaust passage check valve which is opened or closed by a pressure difference between the intake manifold and the exhaust manifold is provided at an inlet of the plurality of EGR exhaust passages, and

wherein the EGR exhaust passage check valve is opened when exhaust pulsation occurs, and the exhaust gas is introduced into the EGR collecting device through the plurality of EGR exhaust passages when the EGR exhaust passage check valve is opened.

2. The engine system of claim 1 , further including: a turbocharger including a turbine mounted in the exhaust line upstream of the exhaust gas purifying device and rotated by the exhaust gas and a compressor mounted in an intake line connected to the intake manifold and rotating in association with the turbine.

3. The engine system of claim 2 , further including:
an intercooler fluidically connected to the compressor and mounted in the intake line upstream of the intake manifold to cool air compressed by the compressor, and
a throttle valve mounted on an inlet of the intake manifold downstream the intercooler and configured to adjust an air amount supplied to the intake manifold.

4. The engine system of claim 1 , wherein an inlet of the EGR collecting device is provided with an EGR gas collecting device check valve which is opened or closed by a pressure difference between the intake manifold and the exhaust manifold.

5. The engine system of claim 4 , wherein the EGR gas collecting device check valve is opened when an exhaust pulsation occurs for the exhaust gas to be introduced into the EGR collecting device.

6. The engine system of claim 1 , wherein a cam drive check valve synchronized with a cycle of the engine is mounted adjacent to the exhaust manifold.

7. The engine system of claim 6 , wherein the cam drive check valve includes a hollow pipe extending in a longitudinal direction of the exhaust manifold.

8. The engine system of claim 7 , wherein at least one through hole penetrating a side wall of the hollow pipe is formed in the cam drive check valve.

9. The engine system of claim 8 , further including: a plurality of EGR exhaust passages branched from the plurality of combustion chambers adjacent to the exhaust manifold and coupled to an inlet of the EGR collecting device, wherein the hollow pipe of the cam drive check valve is mounted in the EGR exhaust passages to selectively open the EGR exhaust passages according to rotation of the hollow pipe.

10. The engine system of claim 9 , wherein the cam drive check valve has a plurality of through holes passing through a side wall of the hollow pipe corresponding to the EGR exhaust passages provided corresponding to the plurality of combustion chambers.

11. The engine system of claim 10 , wherein the plurality of through holes are formed in order at intervals of 45° along a circumferential direction of the cam drive check valve.

12. The engine system of claim 11 , wherein the cam drive check valve rotates to operate to fluidically-communicate with one of the combustion chambers and the plurality of through holes which are exhaust strokes of the plurality of combustion chambers, and through the EGR exhaust passages connected to the combustion chambers which is the exhaust strokes, the exhaust gas flows into the EGR collecting device.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Park Yeongseop
• Park Jong Il
• Hong Seungwoo
• Oh Heechang
• Han Dong Hee
• Lee Hyungbok

Classifications

• F02M26/14 Primary

  in relation to the exhaust system · CPC title

• F02M26/65

  Constructional details of EGR valves · CPC title

• F02M26/02

  EGR systems specially adapted for supercharged engines · CPC title

• F02M26/615 Primary

  the exhaust back pressure · CPC title

• F02B29/04

  Cooling of air intake supply · CPC title