Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Hyokyung Lee

Chang Hwan Kim

Jin Ha Lee

Jun Sung Park

Sangmin Lee

Jin Woo Park

Yoon Sang Nam

Sang-Min Lee

Cheol Beom Lim

Sungmu Choi

Jie Won Park

Seunghyo Noh

Disclosed is a catalyst for removing saturated hydrocarbon including an acidic support including porous alumina (AlO) and having higher acidity than alumina, and an active metal including platinum (Pt) and supported on the acidic support.

Catalyst for removing saturated hydrocarbon

A vehicle exhaust gas purification system and a control method thereof that may effectively remove nitrogen oxides in an exhaust gas even in a cold state, which is the initial stage of an engine starting, is disclosed. A control method of an exhaust gas purification system of a vehicle may include: a step of performing a rich control for controlling a concentration of non-combusted fuel contained in the exhaust gas flowing into the housing to be a rich fuel directly after the starting of the engine; a step of performing a lean control for controlling the concentration of the non-combusted fuel contained in the exhaust gas flowing into the housing to be a lean fuel; a step of determining whether a temperature of the exhaust gas flowing into the housing is a predetermined temperature or more; and a step of performing a normal control for controlling the concentration of the non-combusted fuel contained in the exhaust gas flowing into the housing so that a lean fuel and a rich fuel are periodically repeated with a regular interval.

Exhaust gas purification system for vehicle

An exhaust gas purification system for vehicle includes: a housing disposed on an exhaust pipe to receive a exhaust gas discharged from an engine and to exhaust the exhaust gas passed rearward; a front end catalyst disposed in the housing to purify the exhaust gas flowing into the housing through a front end of the housing; a rear end catalyst disposed in the housing to purify the exhaust gas passing through the front end catalyst before the exhaust gas flows out to a rear end of the housing; and a controller connected to the exhaust pipe at a front end of the housing to control a concentration of unburned fuel contained in the exhaust gas flowing into the housing.

Exhaust gas purification system for vehicle and method of controlling the same

An exhaust gas purification system for vehicle provided on an exhaust pipe connected to an exhaust side of an engine for purifying an exhaust gas of the engine includes a housing mounted on the exhaust pipe, a front end catalyst incorporated in the housing to primarily purify the exhaust gas flowing into the housing through the front end portion of the housing, a rear end catalyst incorporated in the housing to secondarily purify the exhaust gas passing through the front end catalyst before the exhaust gas flows out to the rear end portion of the housing, and a controller connected to the exhaust pipe at a front end portion of the housing to control the concentration of unburned fuel contained in the exhaust gas according to temperature of exhaust gas flowing into the housing and speed of the vehicle.

A method of controlling activation of light off time of a catalyst which controls exhaust emission from an engine of a vehicle may include determining whether the vehicle is in a cold start condition; determining a deterioration level of the catalyst by use of a temperature sensor; and retarding a spark timing according to the deterioration level of the catalyst and increasing a temperature of exhaust gas.

Apparatus and method of controlling catalyst activation during cold start of vehicle

A device for purifying exhaust gas may be provided to purify exhaust gas in an engine includes an exhaust line through which exhaust gas discharged from the engine passes, a diesel oxidation catalyst (DOC) that is disposed in the exhaust line to purify hydrocarbon (HC) and carbon monoxide (CO) of the exhaust gas, a urea injector that injects a urea aqueous solution into the exhaust line, and a selective catalyst reduction (SCR) that reduces nitrogen oxide of the exhaust gas passing through the DOC by use of the urea aqueous solution, in which the DOC includes an LTA zeolite catalyst.

Devices for purifying exhaust gas

A device for purifying exhaust gas provided to purify exhaust gas in an engine, may include an exhaust line through which exhaust gas discharged from the engine passes, a NOx storage catalyst that is installed in the exhaust line to absorb a nitrogen oxide discharged from the exhaust gas, and detach an absorbed nitrogen oxide when a temperature of a catalyst is higher than a predetermined value, and a three way catalyst (TWC) arranged in rear of the NOx storage catalyst for reducing the nitrogen oxide detached from the NOx storage catalyst, wherein the NOx storage catalyst includes an LTA zeolite catalyst.

Device for purifying exhaust gas

An exhaust system according to an exemplary embodiment of the present invention includes a nitrogen oxide storing catalytic collector connected to an exhaust line and collecting a nitrogen oxide included an exhaust gas in a first temperature or less; a first selective catalytic reducer disposed at a rear portion of the nitrogen oxide storing catalytic collector and reducing a nitrogen oxide included in the exhaust gas; and a first urea injector disposed at the front side of the nitrogen oxide storing catalytic collector and supplying a urea solution when a temperature of the nitrogen oxide exceeds the first temperature.

Exhaust system and control method of amount of urea supply

An exhaust gas treatment system includes an exhaust line through which exhaust gas flows. A nitrogen oxide purification catalyst is disposed at one side of the exhaust line to reduce the nitrogen oxide. A diesel particulate filter is disposed at a downstream side of the nitrogen oxide purification catalyst, filters a particulate material, and eliminates the material in a set condition, wherein a set amount of oxygen storage material is included in the diesel particulate filter.

Exhaust gas treatment system

An exhaust purification system for an internal combustion engine, and a desulfurization method for the same, recovers purification performance of a denitrification catalyst by removing sulfur poisoned at the denitrification catalyst in an exhaust system. The exhaust purification system may include an exhaust pipe through which an exhaust gas flows, the exhaust gas being generated at the internal combustion engine having a first injector injecting a fuel to a combustion chamber, a second injector mounted at the exhaust pipe and additionally injecting the fuel, a particulate filter mounted at the exhaust pipe downstream of the second injector and filtering particulate matters (PM) in the exhaust gas, a denitrification catalyst mounted at the exhaust pipe downstream of the particulate filter and reducing nitrogen oxide contained in the exhaust gas, and a control portion performing desulfurization of the denitrification catalyst when a desulfurization entering condition and a desulfurization condition are satisfied during regenerating the particulate filter.

Exhaust purification system for internal combustion engine and desulfurization method for the same

An exhaust system may include an exhaust line through which exhaust gas that is formed in an engine is exhausted, a nitrogen oxide purification catalyst that is disposed on the exhaust line to reduce nitrogen oxide that is included in the exhaust gas, an injector to additionally inject fuel into the exhaust line or a cylinder, and a fuel cracking catalyst that is disposed between the injector and the nitrogen oxide purification catalyst to crack the fuel that is injected through the injector, to transform the injected fuel into a high efficiency reducing agent, and to raise the temperature of the latter part thereof through an oxidation reaction.

Exhaust system

An exhaust system may include an exhaust line through which a combusted exhaust gas is exhausted outside, a nitrogen oxide purification catalyst that is mounted on the exhaust line and uses unburned fuel or hydrocarbon to reduce one part of the nitrogen oxide in the exhaust gas and diffuse the other part thereof to store therein, an injector that injects fuel into the exhaust line, a fuel cracking catalyst that is disposed between the injector and the nitrogen oxide purification catalyst to activate the additionally injected fuel from the injector through thermal decomposition so as to generate a reducing agent of high reactivity, and a control portion that controls the injector to additionally inject fuel in a predetermined condition such that the nitrogen oxide purification catalyst uses the activated reducing agent to detach and reduce the nitrogen oxide that is stored therein.

A catalyst for purifying exhaust gas in vehicles may include a precious metal and porous structures that serve as a supporting material for the precious metal. The porous structures are comprised of a plurality of channels which are connected with each other by a plurality of bridges. The channels may have multiple entrances that allow reactants to pass through and react with the precious metal.

Highly efficient catalyst using precious metal

An NOx reduction catalyst and an exhaust system using the same may include an NOx reduction catalyst mounted at an exhaust pipe through which exhaust gas passes, wherein the NOx reduction catalyst includes first and second catalyst layers coated on a carrier, the first catalyst layer being disposed close to the exhaust gas, and the second catalyst layer being disposed close to the carrier, wherein a portion of nitrogen oxide contained in the exhaust gas is oxidized while passing through the first catalyst layer, and the oxidized nitrogen oxide is stored in the second catalyst layer, wherein the nitrogen oxide stored in the second catalyst layer is released through a substitution reaction with an additionally injected fuel, and wherein the released nitrogen oxide is reduced by the additionally injected fuel in the first catalyst layer.

Growing community of inventors

Anyang-si, South Korea

Hyokyung Lee