An internal combustion engine with a water injection device and a method for operating the internal combustion engine

A technology of internal combustion engine and water injection system, applied in fuel injection device, internal combustion piston engine, combustion engine, etc., can solve problems such as damaged parts

Pending Publication Date: 2019-12-17
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Here, components of the sprinkler system can be damaged if they are also filled with water

Method used

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  • An internal combustion engine with a water injection device and a method for operating the internal combustion engine
  • An internal combustion engine with a water injection device and a method for operating the internal combustion engine

Examples

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Embodiment Construction

[0022] Below, refer to figure 1 The internal combustion engine 1 according to the first preferred embodiment of the present invention will be described in detail.

[0023] as in figure 1 As shown in , an internal combustion engine 1 includes a fuel injection system 2 and a water injection system 3 . The fuel injection system 2 includes a fuel tank 20 , a fuel line 21 , a low-pressure pump 22 and a high-pressure pump 23 . In this case, a fuel line 21 connects the fuel tank 20 to a rail 24 . A pressure sensor 25 can be arranged on the rail 24 .

[0024] as further by figure 1 It can be seen that a plurality of fuel injectors 4 are arranged on the rail 24 . In this case, each fuel injector 4 injects directly into a combustion chamber 5 of the internal combustion engine. exist figure 1 In , this is only shown schematically for one of the fuel injectors.

[0025] The water spray system 3 includes a water tank 30 , a water pipeline 31 and a water pump 32 . In this case, a w...

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PUM

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Abstract

The invention relates to an internal combustion engine comprising: a fuel injection system (2) having at least one fuel injector (4), a fuel line (21), a fuel tank (20) and a fuel pump (23) arranged in the fuel line (21); a water spray system (3) comprising a water tank (30), a water line (31) and a water pump (32) arranged in the water line, wherein the fuel injector (4) is arranged directly on acombustion chamber (5) of the internal combustion engine, and wherein the water line (31) opens into the fuel pump (23) in such a way that water can be mixed into the fuel in a line section (21a) between the fuel pump (23) and the fuel injector (4); and a ventilation line (11) which is arranged on the water line (31) in order to ventilate the water line (31) in the event of a shutdown of the internal combustion engine. The invention also relates to a method for operating an internal combustion engine.

Description

technical field [0001] The invention relates to an internal combustion engine with a water injection system, in particular for use in a vehicle, and to a method for operating such an internal combustion engine. Background technique [0002] Internal combustion engines with water injection systems are known in various designs from the prior art. In this case, the exhaust gas temperature can be reduced by means of the water injection system and the tendency of the internal combustion engine to knock during operation can be avoided. In this case, a separate water spray system is known, for example as described in DE 10 2015 208 476 A1. Here, however, known sprinkler systems are often very complex and expensive to produce. A further problem in sprinkler systems is that at temperatures below 0 degrees there is a risk of water freezing. Here, components of the sprinkler system can be damaged if they are still filled with water. Contents of the invention [0003] In contrast,...

Claims

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Application Information

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IPC IPC(8): F02M25/03
CPCF02M25/03F02M25/0221F02M25/0228F02M43/00F02M43/02F02B47/02F02M25/025F02M25/0227F02M37/0047F02M37/04Y02T10/12
Inventor P·申克
Owner ROBERT BOSCH GMBH
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