International Engine Intellectual Property Company, LLC

David M Hsia

Rogelio Rodriguez

Radek Oleksiewicz

Richard Ptak

Ly V Tran

Kenneth E Rhone

Raymond G Darda

Antonio Martinez, Jr

Chethana Bhasham

Joseph A Fanella

An EGR control method to prevent condensation within the EGR system uses a temperature sensor signal from an EGR cooler exhaust gas outlet to model or estimate exhaust manifold gas temperature upstream of the cooler. If the estimated exhaust manifold gas temperature falls below a predetermined level, the engine control system closes or partially closes the EGR control valve to stop EGR flow through the cooler and the EGR valve.

EMG temp signal model based on EGRC out temp for EGR system anti-fouling protection

A motor vehicle engine () has glow plugs () for aiding combustion of fuel in combustion chambers of the engine when the engine is cold and an ignition switch () is operated to crank the engine. An aberration in engine speed () is used to indicate an under- or non-performing glow plug. Data from sources other than the engine speed source (), such as data related to engine fueling, is also processed by a processor () to exclude them as the cause of the aberration.

Engine glow plug diagnosis using crankshaft sensor data

An apparatus for and method of controlling multiple electronically controlled components () utilizes a controller () that controls one of the components (A). A control interface () replicates the control signal () generated by the controller () for each additional component (B throughE), such that the replicated signal bears significant resemblance to the original control signal with respect to current, voltage, and pulse width. The replicated signals are provided to the additional components (B throughE) at substantially the same time as the control signal () is provided to the first component (A).

Control of multiple electronically controlled components

A diagnostic tool ( ) for testing fuel injectors ( ) and their driver circuits (IDM), including associated wiring harnesses, in a fuel injection system of an engine in a motor vehicle. The tool has a driver-connection port ( ) for connection to the driver circuits and an injector-connection port ( ) for connection to the fuel injectors via jumper wiring harnesses. The tool can perform 1) a fuel injector test, by connecting an ohmmeter to the tool to measure injector coil resistance, 2) a driver-injector test, by connecting an oscilloscope to the tool to observe traces of electric current waveforms applied to the fuel injector, 3) a driver circuit test, by connecting the respective driver circuit to a load that simulates the load imposed by the respective fuel injector, and 4) a cylinder contribution test, by selectively disconnecting certain fuel injector actuators from their driver circuits while leaving the remaining fuel injector actuators connected to their driver circuits.

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Bartlett, IL, United States of America

David M Hsia