Freescale Semiconductor,inc.

Nxp Usa, Inc.

Michael Robert Garrard

William Ernest Edwards

John Matthew Hall

Alistair Robertson

Ray Charles Marshall

Anoop K Aggarwal

Jenifer M Scott

Ralph C Ferrara

Daniel Ziegler

A controller used to control a flyback switching mode power supply. The flyback switching mode power supply is constructed to charge a capacitor, and includes a rectifying device, a series arrangement of a switch and a primary winding of a transformer for receiving an input voltage, and a secondary winding of the transformer for charging the capacitor via the rectifying device to an output voltage. The controller is configured to sense the output voltage and to turn on the switch when the change of the output voltage over time becomes smaller than a predetermined threshold. By using the controller to sense and use the output voltage across the capacitor to turn on the switch, a controlled flyback switching mode power supply that makes use of voltage control is realized.

Flyback switching mode power supply with voltage control and a method thereof

A control methodology and apparatus for an engine suitable for use in capacitor discharge ignition systems for internal combustion engines or brushless DC motors is provided, which make use of a simple logic block to determine for instance an ignition timing advance angle or duty cycle signal based on actual engine speed versus engine control parameter data stored in a table, which is a read-only memory, preferably configurable. To minimize memory space, a small number of values of engine control parameter versus engine speed are stored in the table and the logic block determines the required engine control signal for a measured value of engine speed by an interpolation process, preferably linear interpolation.

Method and apparatus for determining a value of a variable parameter

A system for determining a temperature of a first portion of an engine, and related circuit, and related method of operation, are disclosed. In one example embodiment, the system includes a wheel having a plurality of magnetic teeth, and an electrical circuit including a variable reluctance sensor (VRS) including at least one winding, the VRS being positioned proximate the wheel, where the VRS is in thermal contact with the first portion, and a comparator having first and second input terminals and an output terminal, where the comparator is configured to output an output signal at the output terminal. Either the output signal or a further signal generated by the electrical circuit is at least indirectly indicative of a resistance of the at least one winding, whereby an indication of the temperature of the first portion can be determined based upon the output signal or further signal.

System and method for temperature sensing in an internal combustion engine

An ignition control device having an Electronic Fuel Injection mode and a Capacitive Discharge ignition mode is described. The ignition control device comprises: an output for providing an output voltage, connected or connectable to a load, the load being a fuel injection actuator of an EFI system or an ignition capacitor of a CDI system; and a driver unit connected to the output, for driving the output voltage from a low level to a high level and from the high level to the low level in dependence on an input signal, each transition of the output voltage from the low level to the high level having a low-to-high transition time which is longer for the CDI mode than for the EFI mode.

Ignition control device having an electronic fuel injection (EFI) mode and a capacitive discharge ignition (CDI) mode

The present application provides a calibration device for calibrating a crank angle of a calibrateable combustion engine, the calibrateable combustion engine and a method for calibrating. The calibration device is provided to determine a trigger wheel angle offset from a combustionless driving of the combustion engine in that an in-cylinder pressure profile is recorded, on the basis of which a trigger wheel angle offset is determined and stored at an offset memory of the combustion engine. The combustion engine is configured to determine a crank angle on the basis of a measured trigger wheel angle and the stored trigger wheel angle offset.

Method of calibrating a crank angle of a combustion engine

An electronic device comprises a voltage regulator supplying a current to a load such as a micro-controller unit. The load controls the current provided to the load from the voltage regulator. Preferably, the load controls the level of current supplied to the load upon start-up, thereby avoiding power surges being drawn by the load.

Electronic device and method for controlling current of a processor load by slewing clock frequency

An integrated circuit comprising an adjustable voltage source to allow a plurality of voltage values to be selected; means for measuring a voltage value derived from the adjustable voltage source; and means for configuring the adjustable voltage source to provide a selected voltage value, wherein the selected voltage value is selected based upon a voltage value measured by the means for measuring and a voltage selected by a controller.

Integrated circuit and a method for selecting a voltage in an integrated circuit

A controller for an ignition coil, the controller comprising means for determining a rate of change of current flow through a primary winding of the ignition coil; and means for switching off current flow through the primary winding of the ignition coil as a function of the rate of change of current.

Growing community of inventors

Jaywick, United Kingdom

Michael Robert Garrard