Method for determining an air mass and direct water injection system

A technology of air quality and injection system, applied in the direction of charging system, fuel injection control, electrical control, etc., can solve the problem of not fully removing the filter, and achieve the effect of simple detection

Pending Publication Date: 2021-12-14
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too little air in the air separator can result in no or insufficient air mass in the air separator when the engine is shut off to remove water from the filter

Method used

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  • Method for determining an air mass and direct water injection system

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Embodiment Construction

[0026] figure 1 A schematic diagram of one embodiment of a direct water injection system 10 according to the invention is shown.

[0027] The water direct injection system 10 includes a water pump 20 for pumping or delivering water, a filter 40 for filtering water, an air separator 50 and a high pressure pump 70 .

[0028] The direct water injection system 10 is designed to inject a fuel-water mixture into a combustion chamber of a motor vehicle. A motor vehicle can be a car, truck, passenger car, motorcycle, plane, train or ship. The temperature in the combustion chamber can be lowered by means of water, thereby increasing the power of the engine 80 . Furthermore, fuel consumption can be reduced in this way.

[0029] Between the water pump 20 and the filter 40 is provided a "tank cut-off valve" 30 for blocking the connection pipeline between the water pump 20 and the filter 40 . The filter 40 is provided between the tank shutoff valve 30 and the air separator 50 . The ai...

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PUM

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Abstract

The invention relates to a method for determining an air mass in an air separator (50) of a direct water injection system (10) for injecting a water-fuel mixture into a combustion chamber of an engine (80) of a motor vehicle, wherein the air separator (50) is arranged between a water pump (20) for conveying the water and a high-pressure pump (70) for supplying the water-fuel mixture to a high-pressure injector for injecting the water-fuel mixture into the combustion chamber, wherein the method comprises the following steps: increasing the pressure of the water from a first pressure value to a second pressure value by means of the water pump (20); determining the water volume conveyed through the water pump (20) during the increasing of the pressure of the water by means of the water pump (20); and determining the air mass present in the air separator (50) on the basis of the determined water volume conveyed through the water pump (20).

Description

technical field [0001] The technology disclosed herein relates to a method for determining air quality and a direct water injection system. Background technique [0002] When injecting water, an air separator is arranged between a water pump for conveying the water and a metering module for metering the water introduced into the engine combustion chamber of the motor vehicle. The air separator serves several functions, for example it should dampen pulsation and push water back through the (inactive) water pump when the engine is stopped. [0003] When the engine is started, the air quality in the air separator is adjusted to a predetermined value by opening the air valve and inhaling and / or blowing air. [0004] In hitherto known methods and systems, air mass may decrease or increase over time, eg based on leaks. Too much air in the air separator can cause air to enter the high pressure pump of the water direct injection system used to introduce water into the engine combu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/022F02D19/12F02D41/22F02B47/02
CPCF02M25/022F02D19/12F02D41/22F02M25/0221F02M25/0224F02B47/02F02D41/0025F02D2200/0602F02M37/20F02D41/045F02D2041/1433Y02T10/12F02D2200/04F02D2200/602F02M25/0227F02M25/03
Inventor M·兰德韦尔S·肖特D·林瑟B·胡斯曼A·布鲁恩
Owner BAYERISCHE MOTOREN WERKE AG
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