64results about How to "Lower hydrocarbon emissions" patented technology

A Fuel Fractionation System (FFS) and associated methods to generate and store a fuel for internal combustion engines is provided. FFS provides a distillation column assembly to distill liquid fuel to form a volatile light fraction secondary fuel. The distillation column assembly includes a vaporization module to vaporize a feed fuel in the distillation column and includes a condensation module to condense heavy fraction components of the vaporized feed fuel. FFS also provides a controller positioned to control the vaporization of feed fuel in the distillation column to thereby control the separation of the feed fuel into light fraction fuel and heavy fraction fuel components, and positioned to control the condensation of the heavy fraction components so that fuel exiting a light fraction output port in the distillation column is substantially light fraction fuel components by volume.

A canister communicates with an intake manifold of an internal combustion engine through a purge pipe. The canister absorbs fuel vapor evaporated in a fuel tank. The absorbed fuel vapor is purged into the intake manifold when the engine is on. A gas leak check module communicates with the canister for drawing air by an air suction pump 43. When the engine is off, the air suction pump is driven and draws hydrocarbon floating at a vicinity of an intake port through the purge pipe. Thus, the hydrocarbon floating at the vicinity of the intake port is absorbed in the canister so that emission of hydrocarbon is reduced.

A system and method to control engine valve timing to during the start of an internal combustion engine. Valves that may be deactivated are controlled in a manner to reduce hydrocarbon emissions during the start of an internal combustion engine.

The invention concerns a flow turning vane assembly for use in a duct bend portion of a clean air duct of an air induction system for a vehicle engine. The flow turning vane assembly may have a vane support housing, and a hydrocarbon adsorbent vane mounted to the vane support housing. The hydrocarbon adsorbent vane has a curved shape complimentary to the duct bend portion and includes a hydrocarbon adsorbent layer.

A close coupled three-way catalyst for purification of exhaust gas of motor vehicle and the preparation thereof. The support is selected from cordierite honeycomb ceramic materials having a pore volume of 0.25-0.35 ml / g. The coating layer is the mixture of hexaaluminate and perovskite-type composite oxide, cerium-zirconium solid solution, rare-earth oxide and alumina, alkali-earth oxide and zeolite having a high Si / Al ratio. The active components are palladium-rhodium, rare-earth oxide and transition metal in the hexaaluminate and perovskite-type composite oxide. The catalyst has not only the function of low-temperature catalytic oxidation of hydrocarbons, but also the function of reduction of nitrogen oxides, and can be used for purifying the exhaust gas of motor vehicles using gasoline, liquid gas, or CNG as fuel.

A nickel-based catalyst is provided for reducing carbon monoxide, hydrocarbon emissions, and nitrogen oxides from vehicle exhausts. The catalyst is impregnated directly onto a carrier which is non-reactive with nickel. The nickel is contained on said carrier at a loading of between about 2 to about 20 wt %. When used in a vehicle exhaust gas treatment system, the catalyst provides improved efficiency in reducing CO, HC, and NOx emissions over the use of conventional three-way-catalysts.

An internal combustion engine and a method of reducing hydrocarbon emissions of an internal combustion engine during cold start conditions in disclosed. The engine has at least one cylinder provided with a piston which reciprocates between a top dead-center and a bottom dead-center, at least one intake valve through which intake air is provided, a fuel injector assembly arranged to inject atomised fuel particles directly into the cylinder and means for controlling the opening and closing of the intake valve. According to the invention, intake valve opening is adjusted to occur after top dead center of the piston. When the intake valve opens, a pressure differential exists across the valve. Fuel is injected directly into the cylinder during the time of the pressure differential.

A three-way catalyst including a mixture of nickel and copper is provided for reducing carbon monoxide, hydrocarbon emissions, and nitrogen oxides from vehicle engine exhausts. The catalyst is impregnated onto a carrier substrate which is non-reactive with nickel and copper. When used in a vehicle exhaust gas treatment system, the nickel-copper catalyst provides improved efficiency in reducing CO, HC, and NOx emissions over the use of conventional three-way-catalysts and provides enhanced oxygen storage capacity (OSC) and water-gas-shift (WGS) functions.