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Method and system for an engine

An engine, horizontal technology, applied in the direction of engine components, combustion engines, engine control, etc., can solve problems such as combustion degradation

Active Publication Date: 2018-09-04
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pedaling the driver may not occur at the same time that condensate purge is required
During intermissions, condensate may continue to accumulate in the engine, degrading combustion

Method used

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  • Method and system for an engine
  • Method and system for an engine
  • Method and system for an engine

Examples

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Embodiment Construction

[0019] The following description refers to the extraction of condensate from the charge air cooler (CAC) to engine systems such as Figure 1-2 System and method in the system). During purging, engine airflow may be temporarily increased while engine actuators (such as spark timing) are adjusted in response to condensate flow. CAC condensate purging may occur in response to elevated condensate levels. The engine controller can be configured to execute control programs such as image 3 procedure in ) to adjust per-cylinder fueling during purging based on each cylinder's water absorption sensitivity ( Figure 5 ). Alternatively, the controller can execute Figure 4 The example routine in to adjust fuel injection timing to provide a lean stratified mode of cylinder combustion. The controller can operate one or more cylinders rich and run others lean by adjusting the degree of richness and leanness to maintain exhaust emissions ( Figure 6-8 ). In any event, engine airflow i...

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Abstract

A method and system for purging condensate stored in a charge air cooler is disclosed. In response to increased condensate accumulation in the charge air cooler, airflow through the engine is increased to purge the condensate while adjusting engine drive to maintain engine torque. Combustion stability issues in the engine cylinders are solved by individually regulating the fuel addition to each cylinder during condensate intake.

Description

technical field [0001] The present invention relates to a method and system for extracting condensate from a charge air cooler without degrading combustion stability. Background technique [0002] Turbocharged and supercharged engines can be configured to compress ambient air entering the engine to increase power. Compressing air can cause an increase in air temperature, so a charge air cooler (CAC) can be used to cool the hot air, increasing air density and further increasing the potential power of the engine. Ambient air from outside the vehicle flows through the CAC to cool the intake air flowing through the interior of the CAC. Condensate may form in the CAC when the ambient air temperature decreases or during humid or rainy conditions when the intake air is cooled below the dew point of the water. Condensate can collect at the bottom or internal passages of the CAC and at the cooling turbulators. When torque increases (such as during acceleration), the increased mass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D45/00
CPCF02D41/0065F02D41/008F02D41/0295F02D41/04F02D41/3029F02D41/3076F02D41/402F02P5/045F02D37/02F02D41/0007F02D2041/001F02D2200/0414F02B29/0425F02B29/0437F02B29/0468F02D13/0219F02D13/0265F02M26/05F02M26/10F02B29/04F02B37/00Y02T10/12F02D23/00F02D33/006F02D41/0052F02D41/042F02D41/045F02D41/047F02P5/04F02D41/26F02D41/30
Inventor C·P·格鲁格拉K·R·诺曼S·S·山田
Owner FORD GLOBAL TECH LLC