Fuel injection method and systems for an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsBernd Mahr, Martin Kropp, Hans-Christoph Magel, Wolfgang Otterbach
Life of this patent
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Abstract
A method for injecting fuel at at least two different high fuel pressures via injectors into the combustion chamber of an internal combustion engine. The fuel injection at the higher fuel pressure takes place by pressure-controlled features, during the fuel injection, at least one lower fuel pressure is generated. To that end, a fuel injection system has one local diversion unit for each injector, and the diversion unit can be activated or deactivated via a valve unit.
Claims14
A fuel injection system (1) for an internal combustion engine, in which fuel is injected into the combustion chamber of the engine at at least two different high fuel pressures via injectors (10), wherein fuel is supplied directly from a fuel pump to each injector at the higher of the two pressures, and
- each injector (10) has a fuel line (15) for the fuel to be injected and a local diversion unit (11) located in the fuel line (15), which local diversion unit is activatable via a valve unit (12) to generate the lower of the two high pressures from the higher pressure within the local diversion unit, so that fuel is supplied to each injector at the higher of the two high pressures when the diversion unit is not activated, and at the lower of the two high pressures when the diversion unit is activated.
Dependencies are inferred from the claim text.