| Patent application number | Description | Published |
|---|
| 20090205612 | METHOD FOR CONTROLLING A SPARK-IGNITION DIRECT-INJECTION INTERNAL COMBUSTION ENGINE AT LOW LOADS - A spark-ignition direct-injection internal combustion engine is controlled at low loads through split fuel injections and spark discharges including one injection and spark during a negative valve overlap period and another injection and spark during a compression phase of the engine cycle. | 08-20-2009 |
| 20090272362 | LIGHT LOAD AND IDLE HCCI COMBUSTION CONTROL BY FUEL PRESSURE MODIFICATION - A method for controlling a homogeneous-charge compression-ignition capable engine, operating with spray-guided spark ignition stratified combustion at low load, includes monitoring a speed of the engine, monitoring a load of the engine, determining a desired fuel pressure based upon the speed of the engine and the load of the engine, and utilizing the desired fuel pressure to control fuel injection into the engine, wherein the desired fuel pressure is calibrated to the speed and the load based upon increased stability of the engine at lower fuel pressures and lower soot emissions from the engine at higher fuel pressures. | 11-05-2009 |
| 20090272363 | EXTENSION OF THE APPLICATION OF MULTIPLE INJECTION HCCI COMBUSTION STRATEGY FROM IDLE TO MEDIUM LOAD - A method for controlling an internal combustion engine includes monitoring an engine operating state and selectively operating the engine in a multiple-injection, multiple-ignition combustion mode comprising three injection events based upon the engine operating state. The selective operation includes controlling a first injection during a recompression period of the combustion cycle, controlling a second injection event effective to establish a homogeneous fuel charge prior to a main combustion, and controlling a third injection late in the compression phase of the combustion cycle. | 11-05-2009 |
| 20100037858 | CONTROL STRATEGY FOR A HOMOGENEOUS-CHARGE COMPRESSION-IGNITION ENGINE - A method for operating a multi-cylinder spark-ignition direct-injection internal combustion engine responsive to a low load demand includes monitoring an engine state associated with combustion for each cylinder during each combustion cycle during low load operation, determining a combustion stability index for each cylinder based upon the monitored engine state associated with combustion for the respective cylinder, and individually adjusting an initiation of a spark discharge relative to an end of a fuel injection event for each cylinder based upon the combustion stability index determined for the respective cylinder. | 02-18-2010 |
| 20100145594 | HIGH LOAD SI-HCCI TRANSITIION BY SELECTIVE COMBUSTION MODE SWITCHING - A method for operating a direct-injection internal combustion engine includes unevenly distributing load among a plurality of cylinders by operating a portion of the plurality of cylinders in a spark ignition mode and the remaining portion of the plurality of cylinders in a homogeneous charge compression ignition mode. | 06-10-2010 |
| 20100222985 | METHODOLOGY FOR EXTENDING THE HIGH LOAD LIMIT OF HCCI OPERATION BY ADJUSTING INJECTION TIMING AND SPARK TIMING - A method for operating an internal combustion engine including extended operation in a homogeneous charge compression ignition mode at high loads includes operating the engine in the homogeneous charge compression ignition mode including spark-assisted ignition, monitoring an engine load, monitoring an engine speed, determining the engine to be in a high ringing range based upon the engine load and the engine speed, and when the engine load is in the high ringing range, operating the engine in a reduced ringing mode. The reduced ringing mode includes modulating a fuel injection timing according to a calibrated maximum combustion chamber cooling fuel injection timing, determining a preferred combustion phasing value, and modulating a spark timing based upon the modulated fuel injection timing and the preferred combustion phasing value. | 09-02-2010 |
| 20100241341 | OPERATING STRATEGY FOR HCCI COMBUSTION DURING ENGINE WARM-UP - An engine operating in a spark-assisted homogeneous charge compression ignition mode during warm-up cycle is controlled using settings determined by interpolating between cold engine temperature settings fully warmed-up engine temperature settings. | 09-23-2010 |
| 20100242902 | METHOD AND APPARATUS FOR CONTROLLING COMBUSTION MODE TRANSITIONS IN AN INTERNAL COMBUSTION ENGINE - An internal combustion engine is operative in a spark ignition combustion mode and a controlled auto-ignition combustion mode. Operating the engine includes commanding a transition from a first combustion mode to a second combustion mode. A change in openings and closings of the intake and exhaust valves is commanded to a preferred duration of a negative valve overlap period corresponding to operating in the second combustion mode. Fuel injection parameters and spark ignition events are adjusted to effect operation in the second combustion mode only when a realized duration of the negative valve overlap period exceeds a predetermined threshold. | 09-30-2010 |
| 20100269771 | METHOD AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes intake and exhaust camshafts including high-lift lobes and low-lift lobes separated by a lobe separation angle. The engine transitions between operating in a controlled auto-ignition combustion mode with positive valve overlap and a controlled auto-ignition combustion mode with negative valve overlap solely by selecting the corresponding one of the high-lift lobes and the low-lift lobes. | 10-28-2010 |
| 20100299049 | CONTROL STRATEGY FOR OPERATING A HOMOGENEOUS-CHARGE COMPRESSION-IGNITION ENGINE SUBSEQUENT TO A FUEL CUTOFF EVENT - A multi-cylinder spark-ignition direct-injection internal combustion engine is re-fired subsequent to a fuel cutoff event wherein fuel to all cylinders is cutoff. Re-firing the engine includes selectively firing individual cylinders during re-firing engine cycles exclusively at a predetermined fixed fuel mass until all cylinders have been fired at least once, whereafter subsequent firing of individual cylinders is not limited to the predetermined fixed fuel mass. | 11-25-2010 |
| 20110146637 | EGR CONTROL IN HCCI ENGINES - An internal combustion engine operates in an unthrottled condition during HCCI operation while preferred combustion phasing is determined. An EGR mass flow rate is commanded to correspond with the preferred combustion phasing. The EGR valve is controlled to achieve commanded EGR mass flow rate. Position of the throttle valve is controlled to achieve commanded EGR mass flow rate when the commanded EGR mass flow rate exceeds control authority of the EGR valve. | 06-23-2011 |
