GLOW PLUG HEATER CONTROL
First Claim
Patent Images
1. An engine operating method, comprising:
- performing combustion in a cylinder of an engine; and
increasing a negative torque output of a motor to the engine in response to anticipated increasing current flow to a glow plug.
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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 to reduce tailpipe emissions.
27 Citations
20 Claims
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1. An engine operating method, comprising:
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performing combustion in a cylinder of an engine; and increasing a negative torque output of a motor to the engine in response to anticipated increasing current flow to a glow plug. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An engine operating method, comprising:
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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; increasing a negative torque output of a motor to the engine in response to an anticipated increase in glow plug current, the anticipated increase in glow plug current responsive to a vehicle condition. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An engine system, comprising:
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an engine having a combustion chamber; a glow plug protruding into the combustion chamber; and a controller including instructions to anticipate increasing current supplied to a glow plug in response to vehicle operating conditions after an engine start and after the engine reaches a threshold temperature, and where the controller includes further instructions to increase current to the glow plug in response to vehicle operating conditions. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification