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Injection valve for water injection system of internal combustion engine and water injection system having such injection valve

An injection valve and water injection technology, applied in fuel injection devices, internal combustion piston engines, charging systems, etc., can solve problems such as icing and damage of pipelines and/or components that guide water

Pending Publication Date: 2021-07-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In internal combustion engines with water injection there is the danger that lines and / or components carrying the water freeze at low temperatures and are damaged due to ice pressure

Method used

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  • Injection valve for water injection system of internal combustion engine and water injection system having such injection valve
  • Injection valve for water injection system of internal combustion engine and water injection system having such injection valve
  • Injection valve for water injection system of internal combustion engine and water injection system having such injection valve

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Experimental program
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Embodiment Construction

[0034] Depend on figure 1An injection valve 1 for a water injection system of an internal combustion engine is shown, which comprises an annular solenoid coil 1 for acting on a reciprocating armature 3 which is connected to a valve element 4 . The valve element 4 is now embodied as a hollow needle and is connected at its end facing away from the armature 3 to a spherical valve closing element 29 for releasing and closing the at least one injection opening 30 . When the solenoid coil 2 is energized, a magnetic field is formed whose magnetic force moves the armature 3 including the valve element 4 and the valve closing element 29 in the direction of the core 5 in order to close the working air gap 31 formed between the core 5 and the armature 3 . In this case, the spherical valve closing element 29 releases the injection opening 30 . If the energization of the solenoid coil 2 is then terminated, the armature 3 , the valve element 4 and the valve closing element 29 return to the...

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Abstract

The invention relates to an injection valve (1) for a water injection system of an internal combustion engine, comprising an annular magnetic coil (2) for acting on an armature (3) which can be moved in a stroke-like manner and is connected to a valve member (4), further comprising a hollow cylindrical core (5) which is enclosed at least in portions by the magnetic coil (2) and forms an inlet nozzle (6) or is connected to an inlet nozzle (6), via which the injection valve (1) can be supplied with water from a distributor line (7). According to the invention, a body (8) is inserted in the inlet nozzle (6), which body is penetrated in the axial direction by a flow channel (9) which defines an inlet opening (10) for supplying the injection valve (1) with water from the distributor line (7). The invention further relates to a water injection system for an internal combustion engine having an injection valve (1) according to the invention.

Description

technical field [0001] The invention relates to an injection valve for a water injection system of an internal combustion engine having the features of the preamble of claim 1 . The internal combustion engine can especially be a gasoline engine. Furthermore, the invention relates to a water injection system for an internal combustion engine having an injection valve according to the invention. Background technique [0002] In order to reduce CO2 emissions, it is necessary to optimize the fuel consumption of internal combustion engines, for example by increasing compression or by downsizing in combination with turbocharging. At high engine loads, however, it is generally not possible to operate the internal combustion engine at an optimum operating point with regard to fuel consumption, since the operation is limited due to the tendency to knock and the high exhaust gas temperature. A measure for reducing the tendency to knock and / or lowering the temperature of the exhaust ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/022F02M25/025F02M25/028F02M25/03F16K31/06F16L41/08F16L55/027F02M37/00F02M55/00
CPCF02M25/0221F02M25/025F02M25/028F02M25/03F02M37/0017F02M55/004F16L41/088F16L55/027F02M55/02Y02T10/12
Inventor P·诺瓦克M·舍费尔M·戴斯勒I·布拉克T·斯塔克尔特R·马莱克
Owner ROBERT BOSCH GMBH
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