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Hydrocarbon retaining system and method

A hydrocarbon and maintenance system technology, applied in the direction of charging system, adding non-fuel substances to fuel, electrical control, etc., can solve the problem of increasing exhaust emissions

Inactive Publication Date: 2009-12-30
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Again, the inventors herein have recognized that such operation increases exhaust emissions

Method used

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  • Hydrocarbon retaining system and method
  • Hydrocarbon retaining system and method
  • Hydrocarbon retaining system and method

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 A schematic diagram of a vehicle system 6 is shown. Vehicle system 6 includes engine system 8 connected to hydrocarbon (HC) retention system 22 and fuel system 18 .

[0016] Engine system 8 may include engine 10 having a plurality of cylinders 30 . Engine 10 includes an intake system 23 and an exhaust system 25 . Intake system 23 includes throttle 62 fluidly coupled to engine intake manifold 44 via intake passage 42 . Exhaust system 25 includes an exhaust manifold 48 that leads to exhaust passage 35 that delivers exhaust to atmosphere. Exhaust system 25 may include one or more emission control devices 70 that may be mounted in close-coupled locations within the exhaust system. The one or more emission control devices may include a three way catalyst, a lean NOx trap, a diesel particulate filter, an oxidation catalyst, and the like. should be clearly as figure 2 As shown in the example engine of , other components such as various valves and sensors may be...

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PUM

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Abstract

The invention relates to a hydrocarbon retaining system and a hydrocarbon retaining method, specifically describing a system and a method for conveying exhaust gas to a hydrocarbon retaining device and extracting the exhaust gas to an intake manifold of an engine during start-up of the engine. The invention comprises steps as follows: during warm operation, conveying the exhaust gas of the engine to the hydrocarbon retaining system to store the exhaust gas hydrocarbon; after warm operation, extracting the hydrocarbon stored in the hydrocarbon retaining system; after extraction and during operating mode selection, conveying the exhaust gas of the engine to the hydrocarbon retaining system again when the engine continuously rotates. The invention describes a plurality of replaceable methods for controlling operation and diagnosing deterioration. In addition, the invention also describes a plurality of associated configurations. The invention can adopt cylinder deactivation more; meanwhile, the invention also avoids deterioration exhaust controlling effect associated with reduced catalyst temperature.

Description

【Technical field】 [0001] The present invention generally relates to an exhaust gas treatment system for an internal combustion engine. 【Background technique】 [0002] The engine operates in various operating modes in response to environmental conditions, driver requests, and the like. Some engines may operate sub-banks in a stop mode, such as a fuel cut mode or a cylinder deactivation (intake / exhaust valves remain closed) mode. [0003] However, the inventors have recognized some problems with this approach. As an example, the effectively improved and / or reduced airflow during such shutdown mode may lower the catalyst temperature below the light-off temperature. [0004] Additionally, the engine can also be run rich in various modes to protect engine or exhaust components, such as over-catalyst conditions. [0005] Again, the inventors herein have recognized that such operation increases exhaust emissions. 【Content of invention】 [0006] At least some of the above prob...

Claims

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Application Information

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IPC IPC(8): F02M25/00
CPCF02M25/089F01N2370/40F01N2560/08F01N2240/36F02D41/06F01N2570/12Y02T10/47F02M25/0747Y02T10/20F01N9/00F02M25/0836F01N3/0835F01N2560/06F02D41/0235F01N2410/03F02D41/0055F02D41/003F02M26/41Y02T10/12Y02T10/40
Inventor 夏恩·埃尔沃特迈克尔·詹姆士·乌里奇詹姆士·迈克尔·克恩兹詹森·亚伦·卢佩斯库
Owner FORD GLOBAL TECH LLC