Glow plug heater control
First Claim
Patent Images
1. An engine system, comprising:
- an engine having a combustion chamber;
a turbocharger coupled to the engine having a compressor and turbine;
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.
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Accused Products
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.
12 Citations
20 Claims
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1. An engine system, comprising:
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an engine having a combustion chamber; a turbocharger coupled to the engine having a compressor and turbine; 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An engine operating method, comprising:
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performing combustion in a cylinder of a turbocharged engine via compression of fuel until it ignites; 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. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An engine operating method, comprising:
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combusting diesel fuel in an engine cylinder; 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; and increasing a negative torque supplied to the engine via a motor in response to a request to increase glow plug temperature. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification