摘要:
An exhaust passage for connecting to an exhaust port of a cylinder is provided. The exhaust passage includes a first path extending in a direction generally orthogonal to the central axis of the exhaust port. A second path connects the first path and the exhaust poil and a control valve is provided in the first path. The rotational axis of the exhaust control valve is generally parallel to the direction in which the first path extends. The surface area of an opening connecting the first path and the second path is variable as the exhaust control valve rotates, so as to carry out controlled combustion and exhaust timing. This makes it unnecessary to provide a hollow section for housing an exhaust control valve and bearing at a position close to the exhaust. It is also possible to reduce the size of a cylinder block and to realize smooth flow of exhaust gases by making the inner peripheral surface of the exhaust passage smooth.
摘要:
A combustion controller for a two-cycle engine which enables to cause self firing always at the optimum timing is provided. The combustion controller comprises an exhaust control valve 15 provided in the vicinity of an exhaust port 7 of the two-cycle engine 1 and capable of fully closing the exhaust port and driving control means 47, 38, 39, 40 and 37 to drive the exhaust control valve 15 according to a control map giving an exhaust opening ratio .theta..sub.e depending at least on the engine speed and the throttle valve opening ratio .theta..sub.th in order to control the pressure in the cylinder during up-stroke of the piston 8. The exhaust control valve 15 is formed by a thin shell-like member comprising an exhaust control portion 35 substantially along the cylinder curvature in the exhaust port 7 and wider than the whole width of the exhaust port and a swinging arm portion 34 for connecting at least a side of the exhaust control portion and the rotational shaft 33 perpendicular to the cylinder axis and accommodated in a receiving recess formed in the cylinder block. This receiving recess is communicated with the exhaust passage extending from the exhaust port 7 only in the working zone of the exhaust control portion.
摘要:
The described exhaust gas purifier arrangement for an internal combustion engine provides gas purification efficiency while maintaining high output levels by providing an annular thin-walled catalyst element surrounding gas discharge openings in an expansion pipe having a closed downstream end whereby gas flowing in the expansion pipe is caused to flow radially through the thin-walled catalyst element into a chamber from whence it is conducted to a silencer element for further processing prior to discharge from a tail pipe.
摘要:
To provide a two-cycle internal combustion engine capable of preventing the blow-by phenomenon to improve fuel economy and attain a high exhaust gas purifying performance, and increasing the responsiveness of fuel injection volume. In a two-cycle internal combustion engine, a chamber is disposed in scavenging passages for communicating a crank chamber to a combustion chamber, sealable control valves are respectively disposed in an inlet and an outlet of the chamber, and a fuel feeding system for the supply of fuel into the chamber is provided. The chamber is communicated to one scavenging passage out of a plurality of parallel scavenging passages. The combustion chamber side control valve disposed at an outlet of the chamber on the downstream side of the crank case side control valve provided at an inlet of the chamber, is positioned at the bottom portion of a scavenging passage communicated to the chamber.
摘要:
A deceleration control apparatus is provided which can control a two-cycle engine of the spark ignition type for a vehicle, in which fresh air in a combustion chamber can be self-ignited at an ignition timing preferable for operation of the engine at least upon low load operation, so that, when engine sudden deceleration requirements are satisfied, the combustion condition is automatically changed over from an activated heat atmosphere combustion condition to an ordinary combustion condition to allow sudden deceleration of the engine. A sudden deceleration requirement discrimination CPU for discriminating requirements which require sudden deceleration of the vehicle receives, in addition to a detection signal from a throttle valve opening sensor, detection signals from a vehicle speed sensor, a kill switch, a main switch, a brake switch for detecting that the brakes are applied, a clutch switch for detecting that the clutch is disconnected, and a gear position switch for detecting that the shift operation position is operated to the neutral position, and when the requirements which require sudden deceleration are satisfied, the sudden deceleration requirement discrimination CPU sends an exhaust control valve opening correction signal to an exhaust control valve CPU.
摘要:
The present invention is directed to a deinking agent with which a high-quality pulp sheet having a low Eric number can be obtained.The deinking agent for wastepaper reclamation comprises (a) an alkylene oxide adduct of an ester prepared from a dimer acid and/or polymer acid obtained from an unsaturated fatty acid having a specific number of carbon atoms, and an alcohol having a specific number of carbon atoms at a specific molar ratio, and (b) a higher fatty acid and/or higher fatty acid soap having a specific number of carbon atoms, provided that the (a)/(b) weight ratio is 95/5 to 60/40.
摘要:
The present invention aims at developing a deinking method applicable to the deinking of, for example, waste OA (office automation) paper and telephone directories, whereby a deinked pulp having a high whiteness and little contamination with large ink spots and unliberated ink can be obtained. The object of the present invention can be achieved by deinking, for example, waste OA paper or telephone directories by using a deinking composition containing as an effective component a reaction mixture (III) obtained by conducting the addition reaction of ethylene oxide and propylene oxide with a mixture (I) comprising a fat and oil (a) and a mono- to hexahydric alcohol (b) and/or with a transesterification mixture (II) obtained by conducting the transesterification reaction of a fat and oil (a) with a mono- to hexahydric alcohol (b), in such a manner that the molar ratio of ethylene oxide to propylene oxide which are used as starting materials ranges from 0.8 to 1.2 and that the molar number of ethylene oxide which is used for the addition reaction ranges from 50 to 100 mol per mole of the fat and oil (a).
摘要:
Disclosed are a method for producing ethanol and a device for producing ethanol that are suitable to the recycled use of an enzyme.The device is configured from: a vacuum distillation tower (11) into which an ethanol-fermented liquid generated by saccharification fermentation of a biomass starting material is introduced, and with the interior in a state that is at a lower pressure than atmospheric pressure, that subjects the ethanol-fermented liquid to distillation, distilling ethanol vapor that contains water vapor, and removing as a bottom product the enzyme-containing concentrated waste liquid that is roused for saccharification fermentation of the biomass starting material; and a fractionating tower (12) for fractionating the ethanol vapor distilled from the vacuum distillation tower (11). In this case, the energy of the ethanol vapor can be more efficiently taken advantage of if the device is provided with a first compressor (16) that adiabatically compresses the ethanol vapor distilled from the vacuum distillation tower (11), and the ethanol vapor adiabatically compressed by the first compressor (16) is introduced into the fractionating tower (12).
摘要:
An engine 1 provided with a fuel injection mechanism (a fuel injection system 18 and an FI control unit 41) that supplies fuel of arbitrary quantity into a combustion chamber 9 and a variable valve mechanism (an intake valve 14, an exhaust valve 15, hydraulic electromagnetic valve drive units 16, 17 and a valve event control unit 40) that varies the ratio of burned gas and air-fuel mixture in the combustion chamber 9 for combusting fuel by compression self ignition, is controlled so that a deviation ΔT between combustion initiation temperature and peak temperature after combustion in the combustion chamber 9 is converged in a predetermined range.
摘要:
A deinking composition which comprises a specified nonionic surfactant having a specified solubility parameter as an essential component.A deinking method which comprises adding the above-described deinking composition during in the pulping step (the preceding step) and in any of the subsequent steps (the succeeding step).By use of the deinking composition and the deinking method of the present invention, an excellent deinking performance, including an elevated whiteness, a decrease in the number of unliberated large ink spots and an improved defoaming property of the flotation reject, can be achieved in deinking waste papers, in particular, waste OA papers and blends containing thereof.