TH102792A - Methods and systems for warming the catalytic converter for flue gas purification - Google Patents

Abstract

DC60 (29/05/52) The preheating system of the catalytic converter uses an electric motor (1m) to drive the turbocharger (1) to increase the amount of air delivered to the internal combustion engine (2), regardless of the amount of exhaust gas flowing through the turbine (1t) of the turbocharger (1). The variable injector (1n) controls the exhaust gas flow through the turbine (1t), and the ECU (5) controls the operation of the electric motor (1m) and the variable injector (1n) and the amount of fuel delivered to the internal combustion engine (2). After the internal combustion engine (2) starts, the ECU (5) preheats the catalytic converter (4) by driving the electric motor (1m) to rotate the turbine (1t), open the variable injector (1n), and increase the fuel delivery to the internal combustion engine (2).

Claims (11)

OCR 14SR 1. The method of heating the catalytic converter arranged in the exhaust path of an internal combustion engine with a turbocharger to purify exhaust gases consists of: a first-order step of increasing the amount of air delivered to the internal combustion engine regardless of the amount of exhaust gas flowing through the turbocharger turbine; a second-order step of controlling the exhaust gas flow through the turbine by minimizing heat energy loss by the exhaust gases passing through the turbine and subsequently to the catalytic converter; and a third-order step of increasing the fuel delivery to the internal combustion engine or delivering oxygen to the exhaust gases by increasing the heat present in the internal combustion engine exhaust gases or promoting the catalytic reaction of the catalytic converter. 2. Method of preheating the catalytic converter pursuant to claim 1, whereby the second step involves opening the variable nozzle or waste gate valve provided in relation to the variable displacement turbocharger. 3. The method of preheating the catalytic converter under claim 1, whereby the third step increases the heat present in the exhaust gases by increasing the fuel delivery to the internal combustion engine. 4. The method of preheating the catalytic converter according to claim 1, whereby the third step increases the heat present in the exhaust gases or promotes the reaction with a catalytic converter on the catalytic converter by causing a portion of the air delivered to the internal combustion engine to flow into the exhaust path of the internal combustion engine, before the catalytic converter. 5. The method of preheating the catalytic converter according to claim 1, subsequently combined with the fourth sequence of operating the turbocharger and internal combustion engine in controlled normal operation mode, after the catalytic converter is activated. 6. Catalytic Converter Preheating System: This system, arranged in the exhaust path of a turbocharged internal combustion engine for exhaust gas purification, comprises: an intake control device to increase the amount of air supplied to the internal combustion engine regardless of the amount of exhaust gas flowing through the turbocharger turbine; a turbine control device to regulate the exhaust gas flow through the turbine, minimizing heat loss caused by exhaust gas flowing through the turbine and subsequently to the catalytic converter; an exhaust gas control device to increase fuel delivery to the internal combustion engine or oxygen delivery to the exhaust gases, by increasing the heat present in the internal combustion engine exhaust gases or by promoting the catalytic reaction catalytically accelerated on the catalytic converter; and control devices to regulate the operation of the intake control device, turbine control device, and exhaust gas control device. 7. The catalytic converter preheating system under claim number 6, whereby such turbine control device includes a changeable nozzle or waste gate valve, and such control device reduces the heat energy loss that occurs in the exhaust gas flowing into the catalytic converter, by opening the changeable nozzle or waste gate valve. 8. A catalytic converter preheating system pursuant to claim paragraph 6, whereby such exhaust gas control device increases the delivery of fuel to the internal combustion engine. 9. The catalytic converter heating system under claim number 6, whereby such exhaust gas control device includes a bypass path connecting the intake path, by supplying air to the internal combustion engine, and the exhaust path, and a bypass valve for opening and closing the bypass path, and such control device opens the bypass valve, by allowing a portion of the air supplied to the internal combustion engine to flow into the exhaust path to increase the heat present in the exhaust gases of the internal combustion engine or promote the catalytic reaction on the catalytic converter. 10. The catalytic converter preheating system pursuant to claim paragraph 6, subsequently incorporated, includes a monitoring device that checks whether the catalytic converter is activated. Upon detecting that the catalytic converter is activated, from the outlet of the monitoring device, the control device initiates the turbocharger and internal combustion engine into normal operating control mode. 11. Catalytic converter heating system under claim number 6, whereby such intake control device includes an electric motor connected to the turbocharger or an electric expander arranged before the turbocharger in the intake path, where the electric expander is adjusted to increase the amount of air delivered to the internal combustion engine.