Internal-combustion engines – Charge forming device – Heating of combustible mixture
Reexamination Certificate
2004-07-15
2008-12-16
McMahon, M. (Department: 3747)
Internal-combustion engines
Charge forming device
Heating of combustible mixture
C123S179210, C123S549000
Reexamination Certificate
active
07464699
ABSTRACT:
In a method for heating up the intake air of an internal combustion engine during the preglow phase or start-up phase, the heating power is controlled by a control unit of the engine electronics as a function of the operating data of the internal combustion engine. During the preglow phase, the heating element is initially supplied with full current until the heating element reaches its reference temperature. After the reference temperature has been reached and until the start-up phase, a post-heating phase begins in which the heating element is kept at a constant temperature by way of a relatively low power. During the start-up phase, in a first time period, the heating element is switched off, and in a second time period in which the speed of the internal combustion engine is raised to the starting speed, the heating element is switched on again.
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Joppig Peter
Lantermann Frank
Schmid Friedrich
Vogel Karl-Heinz
Crowell & Moring LLP
Daimler AG
McMahon M.
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