Abstract: A method to operate an electronically controlled air compressor powered by an internal combustion engine, wherein the air compressor is selectively activated when the air compressor minimum threshold value differs from the air compressor minimum threshold hysteresis by a predetermined value, and is deactivated when the air compressor maximum threshold value and the air compressor maximum threshold value hysteresis value differ by a predetermined value.

Abstract: Method, system, and controller for controlling exhaust gas temperatures by adjusting exhaust valve timing and/or fueling for one or more cylinders wherein normal operating cylinders receive additional fuel to compensate for the adjusted cylinders, thereby increasing exhaust gas temperatures. The method, system, and controller may be applicable in systems having an engine which emits exhaust gases having particulates which are captured by the particulate filter.

Abstract: In an internal combustion engine with a crankshaft and an exhaust gas duct including an exhaust gas power turbine which is coupled to the crankshaft via a variable transmission, a control unit is provided for controlling the transmission ratio of the variable transmission such that the speed of the turbine is adapted to the flow speed of the exhaust gas through the turbine in such a way that the turbine is always operated in an optimal efficiency range.

Abstract: A method for controlling exhaust gas particulate emissions from a compression ignition internal combustion engine having a variable geometry turbocharger (VGT) includes the steps of determining backpressure across the engine and air mass flow into the engine, closing vanes of the VGT to provide air mass flow increase when backpressure is increasing, and stopping the step of closing the vanes of the VGT when a decrease in rate of change of air mass flow is determined.

Abstract: A method for controlling an internal combustion engine is provided. The engine includes a variable geometry turbocharger (VGT) system and an exhaust gas recirculation (EGR) system. In a boost mode, the VGT system is controlled with a closed loop based on boost pressure. In an EGR mode, the VGT system is controlled with a closed loop based on EGR rate. Further, in the EGR mode, the EGR system is controlled with a closed loop based on boost pressure. Preferred control techniques are also provided including non-linear compensation and adaptive feed forward control.

Abstract: Method, system, and controller for controlling exhaust gas temperatures by adjusting exhaust valve timing and/or fueling for one or more cylinders wherein normal operating cylinders receive additional fuel to compensate for the adjusted cylinders, thereby increasing exhaust gas temperatures. The method, system, and controller may be applicable in systems having an engine which emits exhaust gases having particulates which are captured by the particulate filter.

Abstract: Error correction and error detection related to DRAM chip failures, particularly adapted server memory subsystems. It uses ×4 bit DRAM devices organized in a code word of 128 data bit words and 16 check bits (FIG. 5, 54). These 16 check bits (FIG. 5, 54) are generated in such a way as to provide a code capable of 4 bit adjacent error correction within a family (i.e., in a ×4 DRAM) and double bit non-adjacent error detection across the entire 128 bit word, with single bit correction across the word as well. Each device can be thought of as a separate family of bits, errors occurring in more than one family are not correctable, but may be detected if only one bit in each of two families is in error. Syndrome generation and regeneration are used together with a specific large code word. Decoding the syndrome and checking it against the regenerated syndrome yield data sufficient for providing the features described.

Abstract: A method of controlling an internal combustion engine includes determining an exhaust gas recirculation (EGR) command signal based on at least one engine condition, and determining a variable geometry turbocharger (VGT) command signal based on at least one engine condition and at least partially based on the EGR command signal. Advantageously, the EGR system and VGT system may be continuously and simultaneously controlled, taking into account the effects of each system on the other, to provide improved and more precise control over engine air flow. In an alternative embodiment, an engine may be controlled with a feedback control system where engine intake chemical composition is the feedback variable.