Abstract: A method for controlling torque in an internal combustion engine to cause an increase in temperature in an exhaust aftertreatment device is disclosed. One group cylinders feed exhaust gases to one exhaust aftertreatment device and another group of cylinders feed exhaust gases to another exhaust aftertreatment device. By operating the groups of cylinders at different operating conditions, the desired temperature in one of the exhaust aftertreatment devices can be achieved while also providing driver demanded torque.

Abstract: The present invention is a dual-stage fuel injection strategy for compression ignition engines in which 15-40% of the fuel is injected into the combustion chamber no later than about ?20 to ?30 CA ATDC and as early as IVC. The rest of the fuel is then injected in one or more fuel pulses, none of which start before about ?20 to ?30 CA ATDC. The fuel injected early in the compression stroke forms a lean mixture that burns with low soot and low NOx emissions. The combustion of that fuel serves to increase in-cylinder temperature such that the ignition delay of subsequent fuel injection pulses is short. This mode is utilized when it is predicted that a NOx spike is imminent. Various other alternative methods for reducing NOx spikes are also disclosed such as specialized EGR systems that can provide EGR with low manifold vacuum.

Abstract: The present invention is a dual-stage fuel injection strategy for compression ignition engines in which 15-40% of the fuel is injected into the combustion chamber no later than about −20 to −30 CA ATDC and as early as IVC. The rest of the fuel is then injected in one or more fuel pulses, none of which start before about −20 to −30 CA ATDC. The fuel injected early in the compression stroke forms a lean mixture that burns with low soot and low NOx emissions. The combustion of that fuel serves to increase in-cylinder temperature such that the ignition delay of subsequent fuel injection pulses is short. This mode is utilized when it is predicted that a NOx spike is imminent. Various other alternative methods for reducing NOx spikes are also disclosed such as specialized EGR systems that can provide EGR with low manifold vacuum.

Abstract: A method and system for controlling combustion mode in an internal combustion engine is disclosed. A method for controlling a multi-cylinder internal combustion engine includes operating a portion of the cylinders according to a first combustion mode and operating a second portion of the cylinders according to a second, different combustion mode. The net torque produced by the cylinders equals driver demanded torque. By this invention, a first combustion mode, which has a desirable combustion characteristic such as high fuel economy or low emissions, but which cannot provide driver demanded torque if used in all cylinders, can be used in combination with a second combustion mode, thereby meeting driver demand for torque and gleaning the benefits of the first combustion mode.

Abstract: A method for controlling torque in an internal combustion engine to cause an increase in temperature in an exhaust aftertreatment device is disclosed. One group cylinders feed exhaust gases to one exhaust aftertreatment device and another group of cylinders feed exhaust gases to another exhaust aftertreatment device. By operating the groups of cylinders at different operating conditions, the desired temperature in one of the exhaust aftertreatment devices can be achieved while also providing driver demanded torque.

Abstract: A method and system for controlling combustion mode in an internal combustion engine is disclosed. A method for controlling a multi-cylinder internal combustion engine includes operating a portion of the cylinders according to a first combustion mode and operating a second portion of the cylinders according to a second, different combustion mode. The net torque produced by the cylinders equals driver demanded torque. By this invention, a first combustion mode, which has a desirable combustion characteristic such as high fuel economy or low emissions, but which cannot provide driver demanded torque if used in all cylinders, can be used in combination with a second combustion mode, thereby meeting driver demand for torque and gleaning the benefits of the first combustion mode.

Abstract: A system for fueling an automotive vehicle includes a transmitter mounted on the vehicle for identifying the type of fuel required by the vehicle and a fuel control and communication subsystem providing fuel which is blended to achieve the characteristics called for by the vehicle mounted transmitter.

Abstract: A direct injection spark ignition engine is disclosed in which fuel is injected during a compression stroke of each combustion chamber for stratified mode operation. Additional fuel is injected into each combustion chamber during its exhaust stroke while operating in the stratified mode to provide an exotherm for heating the NOx trap in response to a low temperature indication. When total fuel injected into the combustion chamber exceeds a predetermined value, engine operation is switched from the stratified to the homogeneous mode.

Abstract: This electronic perimeter intruder detecting security system is arranged for measuring the differences of propagation times and/or velocities of a plurality of different seismic-like waves simultaneously set up by an intruder at a plurality of sensor stations and for calculating the location, velocity, and frequently for identifying the type of intruder. Provisions are disclosed for screening false alarms or waves emanating from without a guarded zone and for ignoring waves from sources not of interest in guarding that zone.