Method for determining the properties of a fuel

A fuel and performance technology, applied in the direction of fuel injection device, fuel injection control, charging system, etc., can solve the problems of insufficient correction, correction, etc., and achieve the effect of reducing the amount error

Active Publication Date: 2016-09-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As long as there is no possibility in the CRS to determine important fuel properties, for example by means of sensors, the correction of the quantitative influence of these properties is insufficient or not possible at all

Method used

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  • Method for determining the properties of a fuel
  • Method for determining the properties of a fuel
  • Method for determining the properties of a fuel

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Embodiment Construction

[0027] The invention is schematically illustrated in the drawings with the aid of embodiments and is described below with reference to the drawings. It should be noted that the numerical values ​​and numerical ranges mentioned in the drawings and the description are indicated by way of example only.

[0028] exist figure 1 In the graph of , the actuation duration in μs is plotted along the abscissa 20 and the duration in mm is plotted along the ordinate 22 3 The gauge used for fuel injection. exist figure 1 A first curve 24 and a second curve 26 for a so-called winter diesel are shown in the diagram of the injection quantity as a function of the actuation duration for a so-called arctic diesel, which is generally suitable for low temperatures.

[0029] The difference in the actuation duration as a dynamic characteristic of an injection valve, for example a solenoid valve, is shown by the two double arrows 28 , 30 at a constant injection quantity for the two fuel types. T...

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Abstract

The invention relates to a method for determining at least one property of a fuel, in which the closing duration of an armature of a solenoid valve which moves through the fuel is measured during at least one actuation period, and is determined from the measured closing duration. A factor representing at least one property of the fuel is obtained.

Description

technical field [0001] The invention relates to a method for determining at least one property of a fuel, a method for operating an internal combustion engine, and a device for carrying out the method. Background technique [0002] In the case of a common rail system (CRS), the injection quantities depend, inter alia, on various fuel properties, which in turn depend on the type of fuel and the ambient conditions. For example, the viscosity of fuel grades such as winter diesel, arctic diesel, biodiesel, mixtures of different fuel grades also additionally depends on the temperature. As long as there is no possibility in the CRS to determine relevant fuel properties, for example by means of sensors, the correction of the quantitative influence of these properties is insufficient or not possible at all. [0003] It should be noted that a longer start time is generally permitted for a cold start to be performed below freezing than for a start above freezing. The requirements re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/40F02M65/00
CPCF02D19/0636F02D41/401F02D2200/0612F02D2200/063F02M65/005Y02T10/30Y02T10/40F02D41/40F02M65/00G01N33/28
Inventor M.西登托普夫S.施平德勒M.霍恩A.雷蒂希F.霍夫曼
Owner ROBERT BOSCH GMBH
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