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Water injection device for an internal combustion engine, motor vehicle and method for injecting water

A technology of water injection and internal combustion engine, applied in the direction of internal combustion piston engine, combustion engine, machine/engine, etc., which can solve the problems of inability to optimize operation of consumption

Active Publication Date: 2020-05-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, known internal combustion engines cannot be operated optimally 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

Method used

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  • Water injection device for an internal combustion engine, motor vehicle and method for injecting water
  • Water injection device for an internal combustion engine, motor vehicle and method for injecting water
  • Water injection device for an internal combustion engine, motor vehicle and method for injecting water

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Embodiment Construction

[0021] The water injection device 1 of the internal combustion engine 2 will be described in detail below according to different embodiments with reference to the drawings. In particular, internal combustion engine 2 is operated according to the Otto principle and with direct gasoline injection.

[0022] exist figure 1 The internal combustion engine 2 and the water injection system 1 are schematically shown in . Internal combustion engine 2 has a plurality of cylinders. Each cylinder of the internal combustion engine 2 includes a combustion chamber 20 in which a piston 21 can reciprocate. Furthermore, each cylinder of internal combustion engine 2 has, for example, an intake duct 22 via which air is supplied to combustion chamber 20 . The exhaust gas is discharged through the exhaust passage 23 . For this purpose, an intake valve 25 is arranged on the intake duct 22 and an exhaust valve 26 is situated on the exhaust duct 23 . Furthermore, reference numeral 24 designates a ...

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Abstract

The invention relates to a water injection device for an internal combustion engine (2), comprising at least one water tank (5) for storing water, at least one water injector (6) for injecting the water into the internal combustion engine (2), and at least one delivery element (3) for delivering water from the water tank (5) to the water injector (6). The water tank (5) is connected to the delivery element (3) by means of at least one first conduit (7) and the delivery element (3) is connected to the water injector (6) by means of at least one second conduit (8). According to the invention, the water injection device (1) also comprises at least one heat exchanger (50) for heating the water.

Description

technical field [0001] The invention relates to a water injection system for an internal combustion engine, a motor vehicle comprising such a water injection system and a method for operating such a water injection system. Background technique [0002] Due to the increasing demands on reducing CO2 emissions, internal combustion engines are increasingly optimized with regard to fuel consumption. However, the known internal combustion engines cannot be operated optimally 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. One possible measure for reducing the tendency to knock and for lowering the temperature of the exhaust gas is water injection. Here, a separate water injection system is usually present in order to be able to implement the water injection. Thus, a water injection system for an internal combustion engine is known, for example, from DE 10 2015 208 476 A1...

Claims

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Application Information

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IPC IPC(8): F02M25/028F02M25/022
CPCF02M25/0221F02M25/028Y02T10/12
Inventor S·维尔茨P·申克
Owner ROBERT BOSCH GMBH
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