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US 6,938,410 B2Granted
Temperature management of catalyst system for a variable displacement engine
AssigneeFord Global Technologies, LLC
InventorsChristopher P. Glugla, John Ottavio Michelini
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Abstract
A system and method for controlling an internal combustion engine having a plurality of cylinders, at least some of which may be selectively deactivated to provide variable displacement operation, including temperature management of at least one engine/vehicle component by monitoring the temperature of the component and controlling activation of at least one cylinder to control the temperature of the component. In one embodiment, the engine/vehicle component is an emission control device, such as a catalytic converter.
Claims6
A system comprising:
- a variable displacement internal combustion engine, the engine arranged in a V-configuration;
- a first emission control device coupled to a first group of cylinders of said engine;
- a second emission control device coupled to a second group of cylinders of said engine;
- an intake manifold coupled to the engine;
- an electronically controlled throttle coupled in said intake manifold;
- a manifold pressure sensor coupled in said intake manifold downstream of said electronically controlled throttle;
- a first exhaust gas oxygen sensor coupled upstream of said first emission control device;
- a second exhaust gas oxygen sensor coupled downstream of said first emission control device;
- a third heated exhaust gas oxygen sensor coupled upstream of said second emission control device;
- a fourth exhaust gas oxygen sensor coupled downstream of said second emission control device;
- and
- a controller for determining temperature of at least one of the emission control devices;
- controlling activation of at least one cylinder based on said determined temperature;
- and
- operating already operating cylinders at an air-fuel ratio based on information from one of said exhaust gas oxygen sensors.
12 more elements
A system comprising:
- a variable displacement internal combustion engine, the engine arranged in a V-configuration;
- a first emission control device coupled to a first group of cylinders of said engine;
- a second emission control device coupled to a second group of cylinders of said engine;
- an intake manifold coupled to the engine;
- an electronically controlled throttle coupled in said intake manifold;
- a manifold pressure sensor coupled in said intake manifold downstream of said electronically controlled throttle;
- a first heated exhaust gas oxygen sensor coupled upstream of said first emission control device;
- a second exhaust gas oxygen sensor coupled downstream of said first emission control device;
- a third heated exhaust gas oxygen sensor coupled upstream of said second emission control device;
- a fourth exhaust gas oxygen sensor coupled downstream of said second emission control device;
- and
- a controller for determining temperature of at least one of the emission control devices;
- controlling activation of at least one cylinder based on said determined temperature;
- and
- operating said activated cylinder at an air-fuel ratio based on information from one of said exhaust gas oxygen sensors.
12 more elements
Dependencies are inferred from the claim text.