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Method and system for improving engine starting

An engine and cylinder technology, applied in the field of improving engine starting, to achieve the effect of stable engine starting and reducing emissions

Inactive Publication Date: 2013-06-19
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be difficult to provide enough heat to the fuel in a timely manner so that the fuel evaporates when injected into the cylinder
Specifically, it can be difficult to heat the fuel to a temperature that allows the fuel to evaporate in the time between combustion events

Method used

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  • Method and system for improving engine starting
  • Method and system for improving engine starting
  • Method and system for improving engine starting

Examples

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Embodiment Construction

[0026] The present invention relates to control figure 1 The engine's cylinder intake port throttles are shown. exist figure 2 An example map of cylinder pressure is shown in and provides insight as to the location of maximum vacuum within the cylinder during lower engine speed conditions. In one example, multiple cylinder port throttles are independently adjusted during engine start to provide improved fuel evaporation. image 3 and Figure 4 The relevant signals during engine start are shown. Figure 5 and Figure 6 Provides a detailed view of different fuel timings during engine start. can be based on Figure 7 method of controlling cylinder port throttles to provide as Figure 3-6 sequence of descriptions. Figure 8 An alternate engine start sequence is shown for a system in which the engine port throttles can operate in unison. Figure 9 is a flowchart of an alternative method for controlling cylinder port throttles.

[0027] now refer to figure 1 , including ...

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Abstract

An engine system and method for improving engine starting are disclosed. In one example, engine port throttles are adjusted to improve fuel vaporization of a fuel that includes alcohol. The system and method may improve engine starting and emissions.

Description

【Technical field】 [0001] The present invention relates to a method and system for improving engine starting. 【Background technique】 [0002] Engines using fuels that include alcohols may be difficult to start at lower temperatures because it may be difficult to vaporize the alcohols and facilitate combustion. One approach to improving the vaporization of fuels including alcohols is to heat the fuel before injecting it into the engine. However, it may be difficult to provide sufficient heat to the fuel in a timely manner such that the fuel evaporates when injected into the cylinder. Specifically, it may be difficult to heat the fuel to a temperature that allows the fuel to vaporize in the time between combustion events. Accordingly, it may be desirable to provide a method of starting an engine using fuel that includes alcohols that does not include heating the fuel. 【Content of invention】 [0003] The inventors herein have recognized the above limitations and have develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F02D41/30
CPCF02D9/02F02D13/0265F02D19/084F02D41/0002F02D41/0025F02D41/008F02D41/062F02D2009/0249F02D2009/0272F02N19/00Y02T10/30Y02T10/40F02D13/0261
Inventor T·G·莱昂内R·D·皮尔西弗J·N·阿勒瑞D·J·刘易斯
Owner FORD GLOBAL TECH LLC
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