Visteon Global Technolgoies, Inc.

Ford Global Technolgoies, LLC

Garon Nigel Heslop

Jon Dixon

Mark Paul Guerrier

Darren Montgomery

Phillippe Paul Robert Lutz

Clive Harrison

Richard Stephen Blachford

This invention relates to an apparatus for controlling the air-fuel ratio demanded by a fuel controller in order to maintain optimum performance of a catalytic converter. Provided is an open loop fuel controller comprising a detector arranged down stream of a catalyst for detecting rich breakthrough; a catalyst model having an estimator for estimating a stored oxygen level in the catalyst; a comparator for comparing an estimated stored oxygen level with a plurality of predetermined thresholds; demand adjusting means for adjusting an air fuel ratio demand in dependence upon a received signal from said comparator and upon a received signal from said detector. A method of open loop fuel control is also provided.

Open loop fuel controller

Fuel controller

This invention relates to an engine torque controller for spark ignition internal combustion engines and more specifically for direct injection engines. The invention provides a torque controller and a method of controlling torque for an engine in which torque is controlled in dependence upon a filtered difference signal where the filtered difference signal is the difference between a desired torque signal and a signal representing an estimate of the current torque.

Engine torque controller

The present invention relates to an apparatus (1) and a method for quantifying the net torque (28) produced by an internal combustion engine, for example, in a motor vehicle. Nominal gross engine torque (2) and expected torque losses (17,19,21) associated with the engine (102) are estimated. Estimated net torque (28) from the gross engine torque (2) and expected torque losses (17,19,21) are calculated. If it is determined that no power is drawn through the gearbox, a corrective torque loss value (21) corrects the estimated expected torque losses associated with the engine (102)

Engine torque control

An apparatus and a method for controlling engine speed in a motor vehicle engine (9) by an engine management system (1) with an engine control output (8,46). The engine management system (1) provides the following operations. A driver demand controller (38) responsive to an accelerator pedal (12) provides a first control signal (40) representative of a target engine speed. A cruise speed controller (22) responsive to a cruise control setting and vehicle speed provides a cruise signal (28). An idle speed controller (30) provides an idle signal (32). A combined idle-cruise speed controller (36) provides a second control signal (42) representative of a target engine speed which is responsive to the greater of the cruise signal (28) and idle signal (32). The greater of the first (40) or second (42) signals is selected to control (8,46) engine speed. When there is no cruise control, the apparatus is defaulted to a condition in which the combined idle-cruise speed controller (36) is responsive only to the idle signal (32).

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Billericay, United Kingdom

Garon Nigel Heslop