Exhaust gas purifying device for diesel engine
专利汇可以提供Exhaust gas purifying device for diesel engine专利检索，专利查询，专利分析的服务。并且PURPOSE: To enable efficient purification of NOX in a condition to reduce fuel consumption and prevent decrease of an output, by a method wherein, when an air-fuel ratio is decided to be lean by means of an air-fuel ratio sensor, feedback control is performed so that the air-fuel ratio of exhaust gas forms a reduction air-fuel ratio.
CONSTITUTION: When engine rotation, engine load, and a car speed, detected by an engine rotation sensor 42, an engine load sensor 44, and a car speed sensor 46, exceed their respective set values, a control valve 38 is forced into an opening state through an ECU 48. Fuel, injected from a surplus injection port 30E of a fuel injection pump 28 and stored in a storage tank 36, is injected to an exhaust system 12 through a control valve 38. A current fuel injection quantity controlled by the control valve 38 is decided so that, based on oxygen concentration information obtained by an O
2 sensor 40, a fuel deficient amount causes an equivalent ratio of exhaust gas to be adjusted to about 1, and feedback control is effected. This enables an air-fuel ratio to be controlled to exhaust gas atmosphere under which a three-dimensional catalyst 22 can purity NOX most efficiently.
COPYRIGHT: (C)1986,JPO&Japio，下面是Exhaust gas purifying device for diesel engine专利的具体信息内容。
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