32results about How to "Good scavenging effect" patented technology

A two-cycle engine is provided that has a cylinder in which is formed a combustion chamber delimited by a reciprocating piston that via a connecting rod drives a crankshaft rotatably mounted in a crankcase. An inlet is provided for a supply of fuel into the crankcase, and an outlet leads out of the combustion chamber. In predetermined positions of the piston the crankcase communicates with the combustion chamber via at least one transfer channel. The cover is secured to a connecting flange of the cylinder, the cover closes off the transfer channel on an outer side of a cylinder, the connecting flange is inclined relative to the longitudinal axis of the cylinder by an angle that opens in a direction toward the crankcase.

The present invention relates to a mesoporous silica / ceria-silica composite and a method for preparing a mesoporous composite and, more specifically, to a mesoporous silica / ceria-silica composite which is composed of mesoporous silica having a hexagonal or cubic structure and ceria having a hexagonal structure provided on a surface and pores of the mesoporous silica, the oxidation state of the ceria being Ce4+ and Ce3+.

The invention belongs to the field of engines, in particular to a motorcycle or automobile engine supercharger. The invention includes an air intake pipe and an exhaust pipe installed at both ends of the casing, an eccentric cylindrical rotor is installed in the casing, a coupling is installed at one end of the rotor, the blades are loosely installed on the rotor cylinder, and several long blades are opened on the rotor cylinder Slot, the strip-shaped blade is inserted in the blade slot, the inner end of the blade slot is clockwise deflection angle a relative to the rotor axis, wherein the deflection angle a is 30° to 32°. The cross-sectional area of ​​the air inlet of the supercharging device is larger than that of the exhaust port, and the air pressure of the gas at the exhaust port increases to achieve the purpose of blade scavenging and supercharging. The special angle of the blade groove can improve the friction and vibration between the blade and the shell, and enhance the scavenging effect. The above-mentioned device has simple structure, small volume and good supercharging effect, and is suitable for supercharging engines of automobiles and motorcycles.

The invention discloses a scavenging system of a two-stroke engine. The system comprises a cylinder provided with a combustion acting chamber, a crankshaft box provided with a crankshaft chamber, a piston and a crankshaft assembly, wherein a fresh mixed air inlet and an exhausting port are formed in the cylinder; a thick mixed air scavenging channel and a thin mixed air scavenging channel are arranged in the crankshaft chamber; the thick mixed air scavenging channel is provided with a first air inlet and a first air outlet; the thin mixed air scavenging channel is provided with a second air inlet and a second air outlet; the thick mixed air scavenging channel and the thin mixed air scavenging channel are arc-shaped and clung to the inner walls of two sides of the crankshaft chamber; a first scavenging port and a second scavenging port are formed in the combustion acting chamber; the first scavenging port is far away from the exhausting port and communicates with the first air outlet; the second scavenging port is close to the exhausting port and communicates with the second exhausting port; a first oil stopping rib and a second oil stopping rib are correspondingly arranged on the thick mixed air scavenging channel and the thin mixed air scavenging channel. According to the system, a layered scavenging state can be formed, so that the content of harmful components in exhaust gas can be reduced, and as a result, the environment can be protected; the consumption of oil in use can be saved.

The invention discloses a piston for a double-stroke crank round sliding block internal combustion engine, which comprises a crown part and a piston seat, wherein the crown part comprises a piston top, a piston ring band and a baffle plate which is extended downwards from the piston ring band and is used for shading an air port; the outer diameter face of the baffle plate is matched with the inner diameter face of a cylinder and is unfolded at a set angle in the circumference direction, and the angle can meet the requirement of shading the air port; a round sliding block accommodating hole for mounting a round sliding block is formed on the piston seat; two guide side plates which are extended downwards in the axial direction are symmetrically arranged on the piston ring band; and the outer diameter faces of the guide side plates can be matched with the inner wall of the cylinder. Compared with the prior art, the piston provided by the invention is provided with the baffle plate for shading the air port, and the baffle plate is only extended at a certain angle in the circumference direction and can be designed in a thinner mode, so that the quality of the piston cannot be obviously improved by the baffle plate, and the crank round sliding block engine has the advantage of keeping relatively low reciprocation inertia. In a preferable scheme, scavenging efficiency is improved by a specially arranged scavenging piston.

The present invention relates to one kind of cam shaft for motorcycle engine, and the cam shaft includes separately set single cylinder inlet cam and single cylinder exhaust cam. The inlet cam has an ascending section angle of 110+ / -1 deg, the exhaust cam has a descending section angle of 113+ / -1 deg, and the base radius is 10.50 mm. The motorcycle engine with the cam shaft has increased inlet valve opening lead angle and exhaust valve delayed close angle, relatively great overlap angle between the inlet valve and the exhaust valve, improved cooling on cylinder end, piston and other parts, lowered engine heat load and raised engine power.

The present invention discloses a new-type feed and its preparation method. Said new-type feed is made up by using corn protein powder and wheat bran as raw material and using neurospora strain No.17 as fermentation zymophyte seed through a certain preparation process. Said preparation process includes the following steps: making slant cuture and solid fermentation, the ratio of corn protein powder and wheat bran is 3:2, the ratio of dried culture medium and water is 1:1.5 and the ratio of MgSO4 and culture medium is 0.01%, and making culture for 4 days at 25deg.C so as to obtain the inventednew-type feed. The resolubility of protein in said new-type feed can be up to above 20%, and the antioxidant activity of said new-type feed can be up to above 200U / mL. Said new-type feed has high nutritional value.

The invention relates to a piston for a two-stroke crank round sliding block internal-combustion engine, comprising a crown part and a piston seat; wherein the crown part is provided with a baffle which extends downwards from a piston ring belt and is used for shielding an air hole, the external diameter surface of the baffle is matched with the internal diameter surface of a cylinder, and the set angle is unfolded along the circumferential direction; and the piston seat is provided with a round sliding block containing hole for installing a round sliding block. The round sliding block containing hole of the bearing seat is arranged inside a round sliding block containing body, the lower side of which is provided with a scavenging piston crown part that is provided with a ring groove provided with an oil ring. Compared with the prior art, the piston is provided with the baffle for shielding the air hole, extends at a certain angle along the circumferential direction and can be designed to be a thinner form, so that the baffle can not lead the mass of the piston to be obviously increased and ensures the crank round sliding block engine to still maintain the advantage of less reciprocating inertia. In the preferential scheme, the scavenging efficiency can be improved by the specially arranged scavenging piston.

The invention discloses a microminiature thermo-motive power generating set, comprising an engine pack and a generator rotor; the engine pack is an axial piston, and a cam is used for converting the up down reciprocating motion of a piston into the rotation motion of the cam; the generator rotor is directly connected with the cam, and two air cylinder bodies in the engine pack are arranged on two sides of the cam oppositely respectively. The microminiature thermo-motive power generating set has the advantages of simple and compact structure, simpleness in control, high working reliability, high efficiency and the like.

The invention discloses a micro-free piston power unit with a self-pressurized type uniflow scavenging structure. The micro-free piston power unit comprises a gas cylinder, a stator winding and a rectifier, the stator winding is wound around the outer surface of the gas cylinder, and the rectifier is connected with the stator winding; the gas cylinder is internally provided with two cavities and an exhaust chamber, the exhaust chamber is formed between the two cavities, partition plates are arranged between the two ends of the exhaust chamber and the two cavities, and the exhaust chamber is provided with an exhaust opening; the two cavities are symmetrically distributed through the center axis of the exhaust opening, a gas inlet is formed in the upper end of each cavity, and a self-pressurized gas inlet channel is formed in the inner bottom of each cavity; and two magnetic pistons are located in the two cavities correspondingly, thus the cavities are internally divided into scavengingchambers and combustion chambers, a piston connecting rod penetrates through the partition plates to connect the two magnetic pistons, and the piston connecting rod is provided with an axial groove structure. According to the self-pressurized type uniflow scavenging structure, the structure design is simple, the gas inlet pressure is increased through the self operation process, meanwhile, the position of a waste gas outlet is changed to form the uniflow scavenging mode, and the scavenging effect of the micro power unit is improved advantageously.

The invention discloses a single cylinder two-stroke internal-combustion engine with a crank circular slide block. A crank circular slide block mechanism of the internal-combustion engine comprises a crank shaft, a circular slide block and a piston corresponding to the circular slide block; the piston is a double-acting piston of which both ends are provided with a working head respectively, and the piston is arranged in an air cylinder; the first working head at one end of the piston is used as a piston head of the internal-combustion engine, and a top surface of the first working head, an air cylinder inner wall and a cylinder cover arranged at one end of the air cylinder enclose to form a working cylinder; and the second working head is used as a scavenging piston head, and a top surface of the second working head, the air cylinder inner wall and a valve plate arranged at the other end of the air cylinder enclose to form a compressor air cylinder. The crank circular slide block mechanism also comprises a dynamic balance rotary block. Via an eccentric hole arranged on the dynamic balance rotary block, the dynamic balance rotary block sheathed on the same crank shaft together with the circular slide block is not directly connected with any reciprocating element and is fixed to the circular slide block as a mass member. The single cylinder two-stroke internal-combustion engine with a crank circular slide block is compact in structure and good in scavenging effect.