Abstract: Disclosed is a new air intake system of an engine including a blow-by gas flow line configured to allow blow-by gas to flow into an intake manifold by recirculating the blow-by gas using a pressure difference according to load of the engine, an intake gas supply line configured to allow intake gas to flow therethrough, the intake gas supply line including a throttle valve configured to control an amount of the intake gas and a turbocharger configured to compress the intake gas, a new air supply line branched from the intake gas supply line and connected to the crankcase, the new air supply line allowing new air to selectively flow into the crankcase, and a new air bypass line configured to allow, when a part of the intake gas is selectively bypassed by the pressure difference, the part of the intake gas to flow into the crankcase.

Abstract: The present invention relates to archery, and more specifically relates to a compound bow of reduced size and weight comprising short limbs (Li), small pulleys and small cams while maintaining the performance of the prior art by linking a differential motion cam and a differential motion pulley of a novel design. The present invention has devised a method for dispensing with large cams and decreasing the scale of compound bows by using three different stratagems. The compound bow is decreased in scale through 1. the use of an idler pulley (IP) and a differential motion cam which rotates by a large extent as shown in FIG. 3, 2. the use of both a Y-cam (YC) which rotates by a large extent and a differential motion cam as shown in FIG. 11, and 3. the use of a combination of Y-cams (YC) which rotate by a large extent as shown in FIG. 16; and this compound bow can be used, by way of example, for hunting and sports and for shooting ropes for life saving purposes.

Abstract: The present invention relates to archery, and more specifically relates to a compound bow of reduced size and weight comprising short limbs (Li), small pulleys and small cams while maintaining the performance of the prior art by linking a differential motion cam and a differential motion pulley of a novel design. The present invention has devised a method for dispensing with large cams and decreasing the scale of compound bows by using three different stratagems. The compound bow is decreased in scale through 1. the use of an idler pulley (IP) and a differential motion cam which rotates by a large extent as shown in FIG. 3, 2. the use of both a Y-cam (YC) which rotates by a large extent and a differential motion cam as shown in FIG. 11, and 3. the use of a combination of Y-cams (YC) which rotate by a large extent as shown in FIG. 16; and this compound bow can be used, by way of example, for hunting and sports and for shooting ropes for life saving purposes.

Abstract: The present invention relates to an arrow shooting device, and more specifically to, a new arrow shooting device and a draw weight adding method, wherein an arrow is shot not by a compound arrow or a compound crossbow, which have been conventionally used, but by a rubber band and a differential motion cam. The arrow shooting device according to the present invention is formed in the straight simple shape, wherein, as shown in FIG. 6, the rubber band having superior elasticity is used rather than a limb in the energy storage method thereof and the retraction speed of the rubber band is converted using a differential motion cam or a differential motion cam so as to be suitable for shooting the arrow. In addition, it is possible to additionally hang the rubber band in the state when drawing is finished, or pull the rubber band by means of a winch, so that even people in general may shoot an arrow with a strong draw weight.