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US 8,281,772 B2Granted
Glow plug heater control
AssigneeFord Global Technologies, LLC
InventorsEric Kurtz, Paul Joseph Tennison, David A. May
Life of this patent
Estimating the term…
Abstract
Methods and systems for operating a glow plug are disclosed. In one example, current supplied to a glow plug can be controlled to promote combustion stability of a cylinder after an engine start. Engine feedgas hydrocarbons may be reduced during conditions where combustion stability may be otherwise reduced in order to reduce tailpipe emissions.
Claims20
An engine system, comprising:
- an engine having a combustion chamber;
- a glow plug protruding into the combustion chamber;
- and
- a controller including instructions to identify a catalyst light out and retard combustion phasing in the combustion chamber and increasing current supplied to a glow plug in the combustion chamber in response to the catalyst light out after the engine has reached a temperature indicative of warm engine operating conditions.
1 more element
An engine operating method, comprising:
- performing combustion in a cylinder of an engine;
- and
- retarding combustion phasing in the cylinder and increasing current supplied to a glow plug in the cylinder in response to a temperature of a catalyst and a temperature of the engine.
An engine operating method, comprising:
- performing combustion in a cylinder of an engine;
- retarding combustion phasing of the cylinder and increasing current supplied to a glow plug in the cylinder in response to a temperature of a catalyst and a temperature of the engine;
- and
- increasing glow plug current and retarding combustion phasing of the cylinder in response to an operating condition of a degraded condition of an emissions control device.
1 more element
Dependencies are inferred from the claim text.