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Device for injecting water for internal combustion engines and method for operating such a device

A technology for internal combustion engines and water injection, applied in fuel injection control, charging systems, mechanical equipment, etc., can solve problems such as functional damage, exhaust gas temperature peak combustion knocking events, etc.

Active Publication Date: 2021-01-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to functional impairments when the water injection system is restarted
Due to this delayed operational readiness, rapid load changes can cause temperature peaks in the exhaust gas and knocking events in the combustion

Method used

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  • Device for injecting water for internal combustion engines and method for operating such a device
  • Device for injecting water for internal combustion engines and method for operating such a device
  • Device for injecting water for internal combustion engines and method for operating such a device

Examples

Experimental program
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Embodiment Construction

[0024] Refer to the following Figures 1 to 3 The device 1 for injecting water according to a preferred exemplary embodiment of the 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.

[0025] 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 in the exhaust duct 23 . Furthermore, reference numeral 24 designates a ...

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PUM

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Abstract

The present invention relates to a device for injecting water into an internal combustion engine (2), comprising: a water tank (5) for storing water; a conveying element (3) for conveying the water, wherein the conveying element (3) is connected to the water tank (5); at least one water injector (6) for injecting water, which is connected with the conveying element (5); a drive (4) for driving the conveyor element (3); and a control unit (10) which is configured to detect a power consumption of the drive (4) in order to determine a system pressure in a line region (8) between the conveying element (3) and the water injector (6). A further aspect of the present invention relates to an internal combustion engine (2) comprising a device (1) according to the invention. The invention further relates to a method for operating a device (1) according to the invention.

Description

technical field [0001] The invention relates to a device for injecting water of an internal combustion engine and to an internal combustion engine of this type. Another aspect of the invention relates to a method for operating a 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. For example, WO 2014 / 080266 A1 discloses a water injection system for an internal combustion engine with exhaust gas rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/03F02M25/028F02D41/00F02D41/20
CPCF02D41/0025F02D2041/2058F02M25/0221F02M25/0227F02M25/025F02M25/028F02M25/03
Inventor I·布拉克P·申克
Owner ROBERT BOSCH GMBH
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