ASYMMETRY CDA ENGINE

• US 20160108826A1
• Filed: 09/18/2015
• Published: 04/21/2016
• Est. Priority Date: 10/21/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: KIM, Back Sik, Ryu, In Sang, SUH, lngee, HA, Kyoung Pyo, KWON, Kiyoung
• Granted Patent: US 9,850,826 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01L 13/0005 Deactivating valves
• CPC Class Codes: F01L 2013/001 Deactivating cylinders
• CPC Class Codes: F02D 13/06 Cutting-out cylinders
• CPC Class Codes: F02D 17/02 Cutting-out cutting-out engines in multiple engine arrangements F02D25/04
• CPC Class Codes: F02D 2041/0012 with selective deactivation of cylinders
• CPC Class Codes: F02D 35/028 by determining the combustion timing or phasing
• CPC Class Codes: F02D 41/0087 Selective cylinder activation, i.e. partial cylinder operation deceleration cut-off F02D41/123
• CPC Class Codes: F02D 41/38 of the high pressure type
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

An asymmetry cylinder de-activation (CDA) engine provided with a first, a second, a third and a fourth cylinder of which CDA apparatuses are mounted thereto respectively may include a crankshaft connected with pistons of each cylinder through a first, a second, a third and a fourth cranking journal respectively, and a controller configured to control operations of the CDA apparatuses, in which phase differences between cranking journals according to firing order may include 90±10 degrees and 270±10 degrees.

Claims

1. An asymmetry cylinder de-activation (CDA) engine provided with a first, a second, a third and a fourth cylinder of which CDA apparatuses are mounted thereto respectively, the asymmetry CDA engine comprising:

a crankshaft connected with pistons of each cylinder through a first, a second, a third and a fourth cranking journal respectively; and

a controller configured to control operations of the CDA apparatuses,

wherein phase differences between cranking journals according to firing order include 90±

10 degrees and 270±

10 degrees.

2. The asymmetry CDA engine of claim 1, wherein the firing order of the engine is the first, the third, the fourth and the second cylinder sequentially, and

phase differences between the first cranking journal and the third cranking journal, between the third cranking journal and the fourth cranking journal, between the fourth cranking journal and the second cranking journal and between the second cranking journal and the first cranking journal are 270±

10 degrees, 180±

10 degrees, 90±

10 degrees and 180±

10 degrees.

3. The asymmetry CDA engine of claim 1, wherein the firing order of the engine is the first, the third, the fourth and the second cylinder sequentially, and

phase differences between the first cranking journal and the third cranking journal, between the third cranking journal and the fourth cranking journal, between the fourth cranking journal and the second cranking journal and between the second cranking journal and the first cranking journal are 180±

10 degrees, 270±

10 degrees, 180±

10 degrees and 90±

10 degrees.

5. The asymmetry CDA engine of claim 1, wherein the controller is configured to operate at least one CDA apparatus and at least one of remaining CDA apparatuses by turns according to a load of the engine.

6. The asymmetry CDA engine of claim 1, wherein the controller is configured to operate two CDA apparatuses by turns according to a load of the engine.

7. The asymmetry CDA engine of claim 1, wherein the controller is configured to operate one CDA apparatus and operates remaining CDA apparatuses additionally according to a load of the engine.

8. The asymmetry CDA engine of claim 1, wherein the controller is configured to control a fuel injection amount into a cylinder of which the CDA apparatus is not operated in accordance with a predetermined map when one or more CDA apparatuses are operated.

9. The asymmetry CDA engine of claim 1, wherein phase differences of each cam are asymmetrical.

10. The asymmetry CDA engine of claim 1, wherein the engine is provided with a turbocharger.

11. The asymmetry CDA engine of claim 1, wherein the engine further comprises an injector which directly injects fuel into each cylinder.

4. The asymmetry CDA engine of claim, wherein the controller is configured to operate at least one CDA apparatus according to a load of the engine.

12. An asymmetry CDA engine provided with a plurality of CDA apparatuses, the asymmetry CDA engine comprising:

a crankshaft connected with pistons of each cylinder through cranking journals respectively; and

a controller configured to control operations of the CDA apparatuses,

wherein a minimum phase difference between cranking journals according to firing order is less than ½

of a maximum phase difference between cranking journals.

13. The asymmetry CDA engine of claim 12, wherein the controller is configured to operate at least one CDA apparatus according to load of the engine, and

the controller is configured to operate remaining CDA apparatuses according to a predetermined operation condition.

14. The asymmetry CDA engine of claim 12, wherein the controller is configured to operate at least one CDA apparatus and at least one of remaining CDA apparatuses by turns according to a load of the engine.

15. The asymmetry CDA engine of claim 12, wherein the controller is configured to control a fuel injection amount into a cylinder of which the CDA apparatus is not operated in accordance with a predetermined map when one or more CDA apparatuses are operated.

16. The asymmetry CDA engine of claim 12, wherein phase differences of each cam are asymmetrical.

17. The asymmetry CDA engine of claim 12, wherein the engine is provided with a turbocharger.

18. The asymmetry CDA engine of claim 12, wherein the engine further comprises an injector which directly injects fuel into each cylinder.