Method of ignition and corresponding ignition unit
AssigneeRobert Bosch GmbH
InventorsManfred Vogel, Werner Herden
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Abstract
The present invention provides an ignition method for an internal combustion engine, an injection being alternatively carried out in at least one first operating mode (H1, H2) or in a second operating mode (S), and the ignition coil being charged as a function of the current operating mode. A control-pulse curve (SI) characteristic of the current operating mode is provided, and the charging of the ignition coil (ZS) is carried out by a control logic element (L) in response to the control-pulse curve (SI), using corresponding, different time characteristics of the primary current. The present invention also provides a corresponding ignition device for an internal combustion engine.
Claims6
An ignition method for an internal combustion engine, an injection being alternatively carried out in at least one first operating mode (H1, H2) or in a second operating mode (S), and the ignition coil being charged as a function of the current operating mode;
- wherein a control-pulse curve (SI) characteristic of the current operating mode is provided;
- and the charging of the ignition coil (ZS) is carried out by a control logic element (L) in response to the control-pulse curve (SI), using corresponding, different time characteristics of the primary current.
The method as recited in one of the preceding claims,
- wherein the iron circuit of the ignition coil is controlled up to the start of saturation, in an operating mode that requires a high initial spark current.
An ignition device for implementing the method as recited in at least one of the preceding claims, having:
- an ignition output stage (ES);
- a control logic element (L) connected in incoming circuit to the ignition output stage (ES);
- and
- an engine control unit (MS) for generating a control-pulse curve (SI) characteristic of the current operating mode;
- in response to the control-pulse curve (SI), the control logic element (L) adjusting the output stage (ES) to a corresponding time characteristic of the primary current.
Dependencies are inferred from the claim text.