Patent ID: 8176891
Filing Date: 2012-05-15
Classification: F02D,Y10T

Abstract:
1. A multi-cylinder engine with a plurality of cylinders, comprising: at least one variable cylinder that performs a power stroke or is deactivated; normal cylinders that perform power strokes at equal rotation intervals; and a control portion that activates or deactivates the at least one variable cylinder according to a predetermined load condition; wherein deactivation position of the at least one variable cylinder is selected based on rotation angle of a crankshaft; wherein crankpins of the at least one variable cylinder are symmetrically disposed based on a center axis of the crank shaft; wherein the variable cylinders and the normal cylinders include a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a fifth cylinder, and a sixth cylinder; wherein a first crankpin corresponding to the first cylinder, a second crankpin corresponding to the second cylinder, a third crankpin corresponding to the third cylinder, a fourth crankpin corresponding to the fourth cylinder, a fifth crankpin corresponding to the fifth cylinder, and a sixth crankpin corresponding to the sixth cylinder are disposed; and the first crankpin, the second crankpin, the fourth crankpin, the third crankpin, the sixth crankpin, and the fifth crankpin are disposed sequentially in a rotating direction of the crankshaft with a uniform rotation angle therebetween.