Internal combustion engine and method for operating an internal combustion engine
AssigneeSchaeffler Technologies AG & Co. KG
InventorsChristian Karbacher, Andreas Thoelke, Gerulf Pedersen, Ikechukwu Martins Onwuegbulam
Life of this patent
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Abstract
The disclosure relates to an internal combustion engine having multiple camshaft control units which are connected to one another in a line by a first network topology and via which a crankshaft signal can be transmitted in unprocessed, amplified or conditioned form. The camshaft control units are designed to suppress forwarding of the crankshaft signal in a first state and to forward or to replicate the crankshaft signal and to send an additional signal in a second state. The disclosure also relates to a method for logically assigning the camshaft control units to the camshafts to be adjusted by them.
Claims19
An internal combustion engine, comprising:
- a crankshaft, and a position of the crankshaft defined by a crankshaft angle,
- a crankshaft sensor configured to provide a crankshaft signal for determining the crankshaft angle,
- a plurality of camshafts, each of the plurality of camshafts having a camshaft phaser and a camshaft control unit,
- a first network topology, configured to connect the camshaft control units to one another in a line and, via the first network topology, the crankshaft signal is transmitted in unprocessed, amplified, or processed form, wherein:
- in a first state, the camshaft control units are configured to suppress forwarding of the crankshaft signal, and
- in a second state, the camshaft control units are configured to forward or replicate the crankshaft signal and send an additional signal.
A method for teaching an internal combustion engine, comprising:
- providing an internal combustion engine having:
- a crankshaft, a position of the crankshaft defined by a crankshaft angle,
- a crankshaft sensor configured to provide a crankshaft signal for determining the crankshaft angle,
- a plurality of camshafts, each of the plurality of camshafts having a camshaft phaser and a camshaft control unit,
- a first network topology configured to connect the camshaft control units to one another in line and via which the crankshaft signal is transmitted in unprocessed, amplified, or processed form, and
- the camshaft control units are:
- configured to, in a first state, suppress forwarding of the crankshaft signal, and
- configured to, in a second state, forward or replicate the crankshaft signal and send an additional signal, and
- in a first configuration phase, unaware of a logical assignment to the camshaft phasers,
- supplying, in a second configuration phase, a crankshaft angle signal to a first camshaft control unit in the first network topology via the first network topology, wherein the first camshaft control unit assigns its logical assignment to a first camshaft of the plurality of camshafts via the crankshaft signal with a simultaneous absence of the additional signal, and
- preventing, via the first camshaft control unit, forwarding of the crankshaft angle signal until the logical assignment to the first camshaft has been made,
- forwarding or replicating the crankshaft angle signal via the first network topology after the logical assignment to the first camshaft has been made, and
- sending an additional signal which contains information about their the logical assignment.
A camshaft phaser system configured for an internal combustion engine, the camshaft phaser system comprising:
- a plurality of camshaft phasers configured to adjust a plurality of camshafts via a crankshaft angle signal,
- a first network topology configured to connect the plurality of camshaft phasers to one another in line and, via the first network topology, the crankshaft angle signal is transmitted in unprocessed, amplified, or processed form, wherein:
- in a first state, the plurality of camshaft phasers are configured to suppress forwarding of the crankshaft angle signal, and
- in a second state, the camshaft phasers are configured to forward or replicate the crankshaft angle signal and send an additional signal.
Dependencies are inferred from the claim text.