Patent application number | Description | Published |
20080312807 | Process for automatically controlling the rail pressure during a starting operation - A process for automatically controlling the rail pressure (pCR) in an internal combustion engine with a common-rail system during the starting operation, the process including: calculating control deviation from a nominal rail pressure and an actual rail pressure; calculating, in a pressure controller, a correcting variable for actuating a suction throttle on the basis of the control deviation; and the suction throttle determining the required quantity of fuel. After the engine has been started, an adaptation process is activated upon detection of a negative control deviation of the rail pressure (pCR) followed by a positive control deviation, as a result of which the correcting variable is changed temporarily in such way as to increase the amount of fuel being delivered. | 12-18-2008 |
20090114170 | Method for automatically controlling the charge air temperature of an internal combustion engine - A method for automatically controlling the charge air temperature of an internal combustion engine, in which a coolant flow upstream of a recooler is distributed as a function of the position of a characteristic diagram-type thermostat valve between a recooler coolant flow and a bypass coolant flow. The temperature of the charge air cooler coolant flow is determined downstream of the recooler by the reunited coolant flows, i.e., the recooler coolant flow and the bypass coolant flow. The charge air temperature is determined by the temperature of the charge air cooler coolant flow. A control deviation of a nominal charge air temperature from an actual charge air temperature is computed, a nominal bypass coolant flow is computed as a correcting variable from the control deviation by means of a charge air temperature controller, a control signal (PWM) for actuating the characteristic diagram-type thermostat valve is determined from the nominal bypass coolant flow by a computing unit, and the position of the characteristic diagram-type thermostat valve ( | 05-07-2009 |
20090143957 | Method for automatically controlling an internal combustion engine - The invention concerns a method for automatically controlling an internal combustion engine, wherein, in a first controller mode, a charge air temperature controller is set as dominant for a map-controlled thermostatic valve, and, in a second controller mode, a coolant temperature limit controller is set as dominant for the map-controlled thermostatic valve. Upstream of a recooler, a coolant flow is divided into a recooler coolant flow and a bypass coolant flow as a function of the position of the map-controlled thermostatic valve. Downstream of the recooler, the temperature of the charge air cooler coolant flow is determined from the combined fractions of the recooler coolant flow and the bypass coolant flow to control the charge air temperature (TLL) or to control the coolant temperature (TKM). | 06-04-2009 |
20130206109 | METHOD FOR THE OPEN-LOOP CONTROL AND CLOSED-LOOP CONTROL OF AN INTERNAL COMBUSTION ENGINE - A method for closed-loop control and open-loop control of an internal combustion engine having a common rail system is closed. In the proposed method, the rail pressure (pCR) is determined in that an electronic engine control unit specifies the flow rate of a high-pressure pump into the rail via an intake throttle on the low-pressure side. An intake throttle actuation function, by which the intake throttle is temporarily actuated, is set to recur over time in the case of known idle time of the internal combustion engine and an actuated engine control unit. | 08-15-2013 |
20140109876 | METHOD FOR MONITORING A PASSIVE PRESSURE REGULATION VALVE - Proposed is a method for monitoring a passive pressure limiting valve ( | 04-24-2014 |
20140123950 | METHOD FOR CONTROLLING AND REGULATING AN INTERNAL COMBUSTION ENGINE - Proposed is a method for controlling and regulating an internal combustion engine ( | 05-08-2014 |
20140156168 | METHOD FOR CONTROLLING RAIL PRESSURE - Proposed is a method for closed loop rail pressure control of a V-type internal combustion engine with an asymmetrical firing order, wherein an actual rail pressure is computed from the measured rail pressure; a system deviation is determined by means of the actual rail pressure and a set rail pressure; and wherein a correcting variable for actuating a pressure actuating element, in particular a suction throttle, for regulating the rail pressure is computed. The invention is characterized by the fact that the actual rail pressure is computed from the measured rail pressure by means of an averaging filter in that below a limit speed (nLi) the rail pressure is averaged over a constant time and in that above the limit speed (nLi) the rail pressure is averaged over a working cycle of the internal combustion engine. | 06-05-2014 |