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Injection system for an internal combustion engine

An injection system, internal combustion engine technology, applied in the direction of internal combustion piston engines, charging systems, combustion engines, etc., can solve problems such as damage, pipeline and/or component freezing, and achieve the effect of simple configuration

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

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Problems solved by technology

[0003] In internal combustion engines with water injection, there is a risk that the lines and / or components conducting the water will freeze at low temperatures and possibly cause damage

Method used

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  • Injection system for an internal combustion engine

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Embodiment Construction

[0020] Depend on figure 1 An injection system for an internal combustion engine is obtained for injecting a fuel-water emulsion into a combustion chamber (not shown) of the internal combustion engine. For this purpose, the injection system has a plurality of high-pressure injection valves 1 arranged on the combustion chamber, which are supplied with a fuel-water emulsion via a common rail 13 . The fuel-water emulsion is supplied to the rail 13 by means of a high-pressure pump 10 in which the media "fuel and water" are mixed and subjected to high pressure.

[0021] The high-pressure pump 10 has an inlet 9 which is connected via a fuel line 11 to a fuel tank 12 so that the high-pressure pump 10 can be supplied with fuel from the fuel tank 12 via the fuel line 11 . The inlet 9 of the high pressure pump 10 is also connected to the water tank 2 via the water line 3 so that the high pressure pump 10 can be supplied with water from the water tank 2 via the water line 3 .

[0022] A...

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Abstract

The invention relates to an injection system for an internal combustion engine, comprising at least one injection valve (1) for injecting a fuel-water emulsion into a combustion chamber of the internal combustion engine, and comprising a water tank (2) and a water line (3) for supplying the injection valve (1) with water, wherein a blocking element (4) is arranged in the water line (3). According to the invention, a metering valve (5) is arranged in the water line (3) upstream of the blocking element (4) and a water line (6) branches off between the metering valve (5) and blocking element (4), at the end of which a valve (7) for emptying the metering valve (5) is arranged.

Description

technical field [0001] The invention relates to an injection system for an internal combustion engine having the features of the preamble of claim 1 . The internal combustion engine can especially be a gasoline engine. Background technique [0002] In order to reduce CO2 emissions, it is necessary to optimize the fuel consumption of the internal combustion engine, for example by increasing the compression or by reducing the size of the internal combustion engine in combination with turbocharging. At high engine loads, however, the internal combustion engine cannot usually be operated in an operating point optimized with regard to fuel consumption, since the tendency to knock and the high exhaust gas temperature limit the operation of the internal combustion engine. Measures for reducing the tendency to knock and / or lowering the exhaust gas temperature provide for water injection, wherein the injection can be directly into the combustion chamber of the internal combustion en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/03F02M25/022
CPCF02M25/03F02M25/0228F02M25/0221F02B47/02F02M25/028Y02T10/12
Inventor P·申克
Owner ROBERT BOSCH GMBH
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