Abstract: A gaseous fuel management system for an automotive vehicle includes at least one gas sensor for detecting the presence of gaseous fuel outside of the confines of the vehicle's fuel storage tank, fuel lines, and prime mover. In the event that fugitive gas is detected and the concentration exceeds a predetermined threshold, the fuel supply to the vehicle's prime mover will be shut off and, if so equipped, the vehicle may then be operated in a battery power mode for the convenience of the driver.

Abstract: A method for improving engine position sensing of an internal combustion engine is described. According to one aspect of the description, the determination of engine position may be improved by correcting rotational position of the internal combustion engine at a number of engine locations.

Abstract: A system and method to control spark in a cylinder of a multi-cylinder engine. Spark can be controlled in a cylinder while reducing the possibility of producing a spark at a spark plug coupled to an ignition coil.

Abstract: A system and method to control spark in a cylinder of a multi-cylinder engine. Spark can be controlled in a cylinder based on operating conditions of a selectively operable valve.

Abstract: Compressing graphic data for a first computer system, e.g. an emulated system, on a second computer system. For each scanline of the graphic data for the first computer system, a number of colors present on the scanline are counted. A new color palette for the scanline is formed at a reduced representation. Then, a representation of each color of each pixel on the scanline is converted to the new palette. The scanline is then run-length encoded. The graphic data is compressed so that it can be, for example, transmitted between a client (e.g. an X client) and a server (e.g. an X server) and conserve network bandwidth.

Abstract: System and method for high-speed, high-accuracy control of a multiphase motor in a vehicle having a DC power supply in response to a motor command signal, the system being a substantially digital implementation. The system includes programmable digital logic for generating a digital desired phase current signal for a particular motor phase. A signal indicative of the actual current in the particular motor phase is generated. The system includes comparators for comparing the desired phase current signal with the actual phase current signal and generating a digital error signal based on the difference between the desired and actual phase current signals. Additionally, the system includes an inverter, including a plurality of switches, for generating the actual current in the particular motor phase from the DC power supply. Based on the digital error signal, the digital logic generates a digital switch state output signal to control the operating state of the inverter.

Abstract: A current mode hysteresis controller for an inverter circuit provides selectable hysteresis bands based on the level of current to be provided. In the preferred embodiment of the controller, selected upper and lower limits are provided with hysteresis band switching being performed by selecting the amplification factor of error signals used to control the current mode hysteresis controller.