Secondary air injection

About: Secondary air injection is a research topic. Over the lifetime, 11452 publications have been published within this topic receiving 112147 citations.

Device for atomizing the fuel for an internal-combustion engine

Abstract: A device for atomizing the fuel for an internal-combustion engine comprising a fuel pump, an electromagnetic fuel-injection valve connected to said fuel pump, an air-injection port adjoining the injection port of said electromagnetic fuel-injection valve, an electromagnetic air flow-controlling valve connected to said air-injection port, and an air pump for feeding air to said air flow-controlling valve, wherein said air flow-controlling valve is controlled in such a manner that the injection of air from said air-injection port takes place simultaneously with the injection of fuel from said fuel-injection valve, whereby the air pump and the driving circuit thereof are of a comparatively small size and the amount of power necessary for driving the air pump is of comparatively small.

Air-fuel ratio control system for internal combustion engine

Abstract: An air-fuel ratio control system for an internal combustion engine provided with a NOx trap catalyst which is disposed in an exhaust gas passageway and arranged to trap NOx when the air-fuel ratio of exhaust gas flowing to the NOx trap catalyst is lean and to release and reduce trapped NOx when the air-fuel ratio is rich. The air-fuel ratio control system comprises a sensor for detecting an air-fuel ratio of exhaust gas in the exhaust gas passageway downstream of the NOx trap catalyst. Additionally, a control circuit is provided and configured to cause the engine to operate at a rich air-fuel ratio to accomplish a rich air-fuel ratio engine operation after an engine operation at a lean air-fuel ratio, and continue the rich air-fuel ratio engine operation for a duration even after the sensor has detected that the air-fuel ratio of exhaust gas is rich.

Exhaust gas recirculation line for an automobile engine

Abstract: An exhaust recirculation of gases in internal combustion engines, notably for automobiles, which has a catalytic converter, recycling apparatus for recycling the exhaust gases and heat recovers apparatus for recovering heat from the exhaust gases. A single heat exchanger is arranged for cooling the recycled exhaust gases and recovering the heat energy from the exhaust gases for heating the passenger compartment of the vehicle and for protecting the catalytic converter from excessively high exhaust temperatures. Valves for diverting exhaust gases, a back-pressure valve and an EGR valve are controlled for this purpose by control electronics. The invention is particularly applicable to direct-injection petrol or diesel engines or to lean-mixture petrol engines.

Method and system for treating exhaust gas, and method and apparatus for separating carbon dioxide

Abstract: A method for treating an exhaust gas, which comprises passing an exhaust gas discharged from a boiler using coal or LNG as a fuel through a cooling medium, to cool the exhaust gas to a first temperature at which carbon dioxide is not solidified and a nitrogen oxide or a sulfur oxide is liquefied or solidified, to thereby liquefy or solidify a nitrogen oxide or a sulfur oxide contained in the above exhaust gas as a harmful gas component and separate it from the exhaust gas and simultaneously remove the moisture contained in the exhaust gas, and then cool the resultant exhaust gas to a second temperature at which carbon dioxide is solidified, to thereby solidify the carbon dioxide contained in the exhaust gas and separate the carbon dioxide from the exhaust gas.

Exhaust emission control system for the exhaust gas of a diesel engine

Abstract: An injection device for a reducing agent, a mixing device and a catalyst device are provided in an exhaust pipe. The mixing device is disposed upstream of the injection device as seen in the direction of flow of the exhaust gas. An exhaust gas inlet pipe is connected to the exhaust pipe along the main axis of the exhaust pipe. A first level of the catalyst device may advantageously be a hydrolysis-catalyst module, while the other levels may be SCR catalyst modules.