Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anti-sticking and diagnostic strategy for exhaust system valves

An exhaust system, waste gate valve technology, applied in electrical control, combustion engine, machine/engine, etc., to solve problems such as turbocharger or engine failure

Inactive Publication Date: 2014-07-23
CATERPILLAR INC
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While not necessarily true for all valves, such as those controlling exhaust gas recirculation, a stuck-closed wastegate valve can potentially lead to catastrophic turbocharger or engine failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-sticking and diagnostic strategy for exhaust system valves
  • Anti-sticking and diagnostic strategy for exhaust system valves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] see figure 1 , shows an exemplary engine system 10 according to the present invention. Engine system 10 includes an electronically controlled engine 11 fluidly connected to an exhaust system 12 . In the illustrated embodiment, the engine 11 is a sixteen cylinder large bore compression ignition engine, the operation of which is controlled by an electronic controller 13 . One aspect of engine control is the operation of electronically controlled fuel injectors (not shown) associated with each of the individual large bore cylinders 19, which may have a bore size in excess of 140 millimeters. Also, in the illustrated embodiment, the electronically controlled engine 11 has a V-configuration with two separate banks of eight engine cylinders each. Thus, the engine 11 has a first exhaust manifold 31 and a second exhaust manifold 32, which may be considered part of the exhaust system 12, which exhausts The tailpipe 35 terminates. Although not required, equalization duct 33 m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An engine system (10) includes an exhaust system (12) fluidly connected to an electronically controlled engine (11). Exhaust from the engine may travel a first pathway (20) through a turbine (16) of a turbocharger (15), or a second pathway (22) that bypasses the turbine (16). An electronically controlled wastegate vale is biased to close the second pathway (22). An electronic controller (13) is in communication with the electronically controlled engine (11) and the electronically controlled wastegate valve. The electronic controller (13) is configured to execute a wastegate diagnostic algorithm to detect a stuck closed default condition of the electronically controlled wastegate valve, and derate the engine in response to detection of a stuck closed fault condition.

Description

technical field [0001] The present invention relates generally to engine systems having electronically controlled valves located in exhaust systems, and more particularly to an active diagnostic method for detecting and avoiding a stuck closed valve condition. Background technique [0002] Today's engine systems are typically equipped with one or more turbochargers, an exhaust gas recirculation system, and electronically controlled valves in the exhaust system that control the compressor bypass, turbine bypass , mass flow rate of recirculated exhaust gas, and other known control characteristics. Exhaust passage away from the turbine is typically controlled by a device known in the art as a wastegate valve. For example, when boost pressure approaches some predetermined maximum or there is a risk of turbo overspeed, the wastegate valve can be opened to direct exhaust gas from the exhaust manifold towards the tailpipe without transferring energy to the Turbocharger. Due to v...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02B37/18F02B37/12F02B39/00F02D41/22
CPCF02B37/001F02B37/007F02B37/18F02B39/16Y02T10/12
Inventor A·C·卢福特D·斯特勒特克R·桑卡尔T·E·巴恩斯G·L·阿姆斯特朗
Owner CATERPILLAR INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com