Patent ID: 7398649
Filing Date: 2008-07-15
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method for influencing an induction gas temperature of an internal combustion engine, comprising: compressing induced fresh air having a first temperature (T expanding the compressed induced fresh air such that the compressed and subsequently expanded fresh air has a second temperature (T recording the second temperature (T recirculating exhaust gas with an exhaust gas recirculation device to combine exhaust gas from an earlier combustion cycle with the fresh air to form a mixture featuring exhaust gas and fresh air; cooling exhaust gas with an exhaust gas cooler, the exhaust gas cooler connected to the exhaust gas recirculation device to influence the temperature of the exhaust gas by controlling the heat flow within the gas exhaust gas recirculation device; providing a control/regulation/computation device which includes a first device and a second device; and calculating a required exhaust gas temperature with the first device, the first device connected to the second device for calculating a coolant through-flow of the exhaust gas cooler, the second device is connected via a coolant flow regulation path to a coolant flow controller, wherein the calculating the required exhaust temperature is based on determining/sensing/measuring/computing measured values and set-point values of engine operating variables selected from the group consisting of: exhaust gas temperature, recirculated exhaust gas mass, recirculated exhaust gas quantity, air/fuel temperature, air/fuel mass, air/fuel quantity, induction gas temperature, induction gas mass, induction gas quantity, coolant temperature, oil temperature of the coolant, oil flowing through the exhaust gas cooler, coolant mass, oil mass, coolant quantity, oil quantity of the coolant, and oil flowing through the exhaust gas cooler, and wherein explicitly influencing the combustion chamber temperature by controlling the heat flow to the combustion chamber and thereby the energy level in the combustion chamber is based on/depends upon the determined/sensed/computed measured values, the determined/sensed/computed set-point values, the determined/sensed/computed measured values temperature increase of the fresh air from the first temperature (T