Process for the detoxification of exhaust gases
AssigneeRobert Bosch GmbH
InventorHeinrich Knapp
Life of this patent
Estimating the term…
Abstract
A process for reducing the concentration of undesirable components in the exhaust gases of an internal combustion machine. The process provides injecting fuel into the hot exhaust gases within the exhaust system and controlling the quantity of this additional fuel by means of an oxygen sensor located within the exhaust system and by appropriate settings of the primary fuel metering system of the engine. A catalyzer unit for chemical interaction with the exhaust gases may also be provided.
Claims3
A process for the detoxification of the exhaust gases of an internal combustion engine which includes a fuel metering system controlled by a first oxygen measuring sensor disposed in the exhaust system of the engine, comprising the steps of:
- a. controlling the fuel metering system so that the ratio of the mass of the air to the mass of the fuel tends to a nominal value for which .lambda. equal 1.02;
- b. providing exhaust injection means for injecting supplementary fuel into the exhaust system of the engine;
- c. providing a second oxygen measuring sensor in the exhaust system of the engine for the purpose of controlling the quantity of fuel injected by said exhaust injection means;
- and
- d. adjusting the fuel metering system to precontrol the delivery of fuel to said exhaust injection means in dependence on the fuel-throughput.
Dependencies are inferred from the claim text.