Asymmetry CDA engine
AssigneeHyundai Motor Company
InventorsIn Sang Ryu, Ingee Suh, Kyoung Pyo Ha, Back Sik Kim, Kiyoung Kwon
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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.
Claims16
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, the first, the second, the third and the fourth cranking journal being positioned in series along the crankshaft;
- 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,
- wherein the firing order of the engine is the first, the third, the fourth and the second cylinder sequentially, and
- wherein the 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.
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,
- wherein a firing order of the engine is the first, the third, the fourth and the second cylinder sequentially,
- wherein the cranking journals include a first cranking journal coupled to the first cylinder, a second cranking journal coupled to the second cylinder, a third cranking journal coupled to the third cylinder, and a fourth cranking journal coupled to the fourth cylinder, the first to fourth cranking journals being positioned in series along the crankshaft, and
- wherein the 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.
Dependencies are inferred from the claim text.