EGR cooling system with multiple EGR coolers

A technology of EGR cooler and cooling system, which is applied in the direction of charging system, machine/engine, adding non-fuel substances to fuel, etc., and can solve problems such as pollution

Inactive Publication Date: 2009-04-22
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To at least partially address the problem of providing adequate cooling to an engine while avoiding EGR fouling, an EGR cooling system is provided

Method used

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  • EGR cooling system with multiple EGR coolers
  • EGR cooling system with multiple EGR coolers
  • EGR cooling system with multiple EGR coolers

Examples

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Embodiment Construction

[0009] figure 1 An example EGR cooling system 100 configured to meet the EGR cooling requirements of an engine operable over a wide range of engine loads, such as a turbocharged diesel engine, while reducing EGR fouling is shown.

[0010] System 100 may include engine 102 coupled to intake system 104 and exhaust system 106 . Engine 102 may be various types of internal combustion engines, such as diesel engines, gasoline engines, and engines burning alternative fuels, such as biofuels and ethanol, or combinations thereof.

[0011] The intake system 104 may include an intake passage 108 connected to an intake manifold 110 , which in turn is connected to the engine 102 . The exhaust system 106 may include an exhaust passage 112 connected to an exhaust manifold 114 , which in turn is connected to the engine 102 .

[0012] EGR cooling system 100 may include an EGR valve 116 for diverting exhaust gas in exhaust passage 112 as EGR, and an EGR mixer 118 for mixing EGR with intake ai...

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PUM

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Abstract

An EGR cooling system is provided. The EGR cooling system comprising a plurality of EGR coolers configured to cool the EGR to a plurality of successively lower temperatures, where at least one of the plurality of EGR coolers includes a finned EGR cooler that comprises a plurality of channels for dissipating heat in the EGR, the plurality of channels increasing heat transfer surface area while having sufficient fin spacing to avoid clogging. The EGR cooling system may further comprise a catalyst configured to remove particle matters and / or hydrocarbons from the EGR, the catalyst positioned upstream of at least one of the plurality of EGR coolers. The inventive EGR cooling system can satisfy the EGR cooling requirement of high load engine without notably incereasing the size of the EGR cooling system and can reduce the dirty of the EGR.

Description

technical field [0001] The invention relates to an EGR cooling system of an engine, in particular to an EGR cooling system with a plurality of EGR coolers. Background technique [0002] Exhaust gas recirculation (EGR) is commonly used for NOx emission control in internal combustion engines. Without cooling, EGR can raise intake air temperatures above a level that can negatively affect engine operation. As a way of dealing with this problem, an EGR cooler using engine coolant as a low-temperature medium is used to lower the EGR gas temperature. [0003] Some diesel engines have high EGR cooling requirements due to the large amount of EGR required to meet NOx emissions. In such engines, the use of engine coolant alone to cool the EGR is either insufficient or requires the use of a particularly large EGR cooler that exceeds the available fitting space in the engine compartment. As an option, the standard size EGR cooler can be accompanied by an additional EGR cooler that fur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/07
CPCF02M25/0732F02M25/0737F02M25/0754F02M25/074F02M25/0722Y02T10/121F02M25/0728F02M26/19F02M26/25F02M26/24F02M26/32F02M26/35F02M26/47
Inventor 丹尼尔·约瑟夫·斯泰尔斯约翰·威廉·霍德朱莉娅·朱利阿诺罗伯特·霍恩布洛尔·梅尔
Owner FORD GLOBAL TECH LLC
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