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Water injection device of internal combustion engine and method for operating such water injection device

A technology of internal combustion engine and water injection, which is applied in the direction of fuel injection control, charging system, mechanical equipment, etc., can solve the problems of functional damage of internal combustion engine, and achieve the effect of reducing requirements and reducing efficiency

Active Publication Date: 2018-01-23
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is thus possible that there is not enough water for the further injection, which could lead to functional impairment of the internal combustion engine

Method used

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  • Water injection device of internal combustion engine and method for operating such water injection device
  • Water injection device of internal combustion engine and method for operating such water injection device
  • Water injection device of internal combustion engine and method for operating such water injection device

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Embodiment Construction

[0027] Refer to the following figure 1 and 2 The water injection device 1 according to the first embodiment of the present invention of the internal combustion engine 2 will be described in detail. The internal combustion engine 2 is operated in particular according to the Otto principle and with direct gasoline injection.

[0028] exist figure 1 2 schematically shows an internal combustion engine 2 with a plurality of cylinders and a part of the water injection system 1 according to the invention. The internal combustion engine 2 comprises a combustion chamber 20 per cylinder, in which a piston 21 can move back and forth. Furthermore, internal combustion engine 2 preferably has two intake valves 25 per cylinder, each with an intake port 22 , via which air is supplied to combustion chamber 20 . Exhaust gases are conducted away via exhaust duct 23 . To this end, exhaust valves 26 are arranged on the exhaust duct 23 . Furthermore, reference numeral 24 designates a fuel inj...

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Abstract

The invention relates to a water injection device of an internal combustion engine (2), comprising a water tank (5) for storage of water, at least one water injector (6), a conveying element (3) for conveying the water, which element is connected by means of an intake line (7) and a return line (13) to the water tank (3), and a first heating element (19a) which is arranged at least partially on the intake line (7). According to the invention the first heating element (19a) is configured to defrost water which is located in the water tank (5) and / or in the intake line (7) and is frozen. Furthermore the conveying element (3) is configured according to the invention to convey the defrosted water in the intake line (7) back into the water tank (5) via the return line (13). A further feature ofthe invention relates to an internal combustion engine having a water injection device (1) according to the invention and to a method for operating the water injection device (1).

Description

technical field [0001] The invention relates to a water injection system for an internal combustion engine and to an internal combustion engine of this type. A further aspect of the invention relates to a method for operating a water injection device of this type. Background technique [0002] Due to the ever-increasing demands on reducing CO2 emissions, internal combustion engines are increasingly being optimized with regard to fuel consumption. Of course, known internal combustion engines operate suboptimally with regard to consumption at operating points with high loads, since the operation is limited by the tendency to knock and the high exhaust gas temperature. A possible measure for reducing the tendency to knock and for lowering the temperature of the exhaust gases is water injection. Here, there is usually a separate water injection system for water injection. A water injection system for an internal combustion engine with exhaust gas recirculation is known, for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/025F02D41/00F02B47/02
CPCF02B47/02F02D41/0025F02D41/021F02D41/064F02M25/025
Inventor I·布拉克P·申克
Owner ROBERT BOSCH GMBH
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