Patent application number | Description | Published |
20080256931 | EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device includes a reducing agent adding valve for injecting a reducing agent into an exhaust pipe. The adding valve has a tip end portion having a nozzle and facing an internal space of the exhaust pipe. The tip end portion is disposed outwardly of an inner circumferential surface of the exhaust pipe. The adding valve is kept out of direct striking contact with the exhaust gas and hence is substantially free from thermal degradation and adhesion of deposits. | 10-23-2008 |
20080264043 | EXHAUST EMISSION CONTROL DEVICE - An exhaust emission control device has an additive valve and a control unit to decrease nitrogen oxides contained in an exhaust gas by means of a reducing agent. The control unit sets a valve opening period of time and a valve closing period of time alternately elapsing in a repetition cycle. The control unit controls the valve to discharge the agent into the exhaust gas during each valve opening period and to stop discharging the agent during each valve closing period. The control unit sets the valve opening period to be shortened as a flow rate of the exhaust gas is lowered, so that a penetration force of the reducing agent is appropriately set. The control unit sets the repetition cycle at a value depending on the flow rate of the nitrogen oxides to sufficiently deoxidize the nitrogen oxides by means of the agent. | 10-30-2008 |
20090183496 | EXHAUST GAS PURIFYING APPARATUS - A throttle unit placed in an exhaust gas passage controls an opening-ratio of each of first and second valve members to control a gas-flow sectional area of the exhaust gas passage. When the temperature of a three-way catalyst is low, the throttle unit introduces the exhaust gas flow into a part of an outer-periphery of the three-way catalyst. This control can rapidly increase the temperature of the three-way catalyst from an early period of starting an internal combustion engine within a short period of time. The throttle unit increases the gas-flow sectional area of the exhaust gas passage according to increasing the temperature of the three-way catalyst. When the three-way catalyst reaches its activation temperature, the throttle unit instructs the first and second valve members to fully open. This decreases a pressure loss of the exhaust gas because the exhaust gas is supplied into the entire of the three-way catalyst. | 07-23-2009 |
20090183497 | EXHAUST GAS PURIFYING APPARATUS - In a hybrid vehicle equipped with an exhaust gas purifying apparatus, when a gasoline engine stops, an exhaust gas passage is closed by a pair of upstream-side and downstream-side throttle units to form an accommodation space. A pressure reduction unit reduces a pressure of the closed accommodation space where a three way catalyst is placed. The exhaust gas around the three way catalyst in the closed accommodation space does not leak into either an outside atmosphere side or into the gasoline engine side. Reducing the pressure in the closed accommodation space decreases heat conduction through the exhaust gas toward the outside. It is thereby possible to prevent the temperature drop of the three way catalyst and to keep the three way catalyst at a temperature of not less than its activation temperature for a long period of time even if the gasoline engine stops. | 07-23-2009 |
Patent application number | Description | Published |
20080260597 | Reducing gas generator and solid reductant SCR system having the generator - A reducing gas generator generates reducing gas including ammonia. The generator includes a solid reductant and a heat-generating portion. The solid reductant is formed in a columnar shape. A cross-sectional surface of the solid reductant has a constant shape and is perpendicular to a central axis of the solid reductant. The heat-generating portion includes a heat-generating surface opposed to a lower surface of the solid reductant in a vertical direction thereof and in contact with an entire region of the lower surface, and a heating element that heats the heat-generating surface when energized, so that the solid reductant is heated and decomposed to generate the reducing gas. | 10-23-2008 |
20080283019 | DILUTION LIMITING DEVICE - An anterior chamber receives a mixture fluid, in which a lubricant oil and a fuel are mixed. A semipermeable separation film is permeable to the fuel component in the anterior chamber and is not permeable to the lubricant oil in the anterior chamber due to a molecular size difference between the lubricant oil and the fuel, so that the semipermeable separation film selectively separates the fuel component from the mixture fluid. A posterior chamber is placed on an opposite side of the semipermeable separation film, which is opposite from the anterior chamber. The posterior chamber receives the separated fuel component, which is separated by the semipermeable separation film. | 11-20-2008 |
20120258030 | GAS SEPARATION AND RECOVERY APPARATUS AND GAS SEPARATION AND RECOVERY METHOD - A gas separation and recovery apparatus that separates and recovers nitrogen oxides from a gas mixture includes: a liquid storing portion that stores a liquid, the liquid absorbing the nitrogen oxides; a gas-liquid contacting portion in which the liquid and the gas mixture contact with each other; and a liquid recovering portion that recovers the liquid after the liquid contacts the gas mixture. The liquid is an ionic liquid that chemically absorbs the nitrogen oxides. | 10-11-2012 |
20120298071 | COMBUSTION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A combustion system of an internal combustion engine has a fuel injector injecting a fuel directly into a combustion chamber and a water injector injecting a water (non-combustible fluid) into the combustion chamber. The water collides with a fuel spray which the fuel injector injects. A penetrating force of the fuel spray is decreased and the fuel spray hardly reaches a cylinder wall surface. The injected fuel is combusted at a position away from the cylinder wall surface, so that the combustion heat transferred to the cylinder wall surface is reduced and the heat loss of the combustion can be decreased. | 11-29-2012 |
20130054119 | CONTROL SYSTEM FOR COMBUSTION SYSTEM - A control system for a combustion system is applied to a combustion system which has a fuel injector injecting a fuel directly into a combustion chamber and a water injector injecting water (non-combustible fluid) into the combustion chamber. When a combustion engine operates at high load, the water collides with a fuel spray which the fuel injector injects. When a combustion engine operates at low-load, the water injection starts before the fuel injection and the water injection terminates before the fuel injection starts. Thus, the misfire can be avoided and NOx can be decreased by water injection at low-load operation of a combustion engine. | 02-28-2013 |