Unlock instant, AI-driven research and patent intelligence for your innovation.

Systems and methods for split exhaust engine systems

A technology of engine and exhaust valve, which is applied in the direction of engine starting, engine components, combustion engine, etc., and can solve the problems of inaccurate measurement of EGR flow and direct blow volume

Active Publication Date: 2022-05-27
FORD GLOBAL TECH LLC
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current engine sensors may not be able to accurately measure EGR flow and blow-through in the first exhaust manifold

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
  • Systems and methods for split exhaust engine systems
  • Systems and methods for split exhaust engine systems
  • Systems and methods for split exhaust engine systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The following description relates to systems and methods for operating a split-flow exhaust engine with blow-through and exhaust gas recirculation (EGR) via a first exhaust manifold to an intake. like Figure 1A As shown, the split-flow exhaust engine may include a first exhaust manifold (referred to herein as a scavenged exhaust manifold) exclusively coupled to the scavenged exhaust valve of each cylinder. The scavenging manifold is coupled to the intake passage upstream of the turbocharger compressor via a first EGR passage including a first EGR valve (referred to herein as a BTCC valve). The split-flow exhaust engine also includes a second exhaust manifold (referred to herein as a bleed exhaust manifold) exclusively coupled to the bleed exhaust valve of each cylinder. A bleed manifold is coupled to an exhaust passage of the engine, where the exhaust passage includes a turbocharger turbine and one or more emission control devices (which may include one or more catalys...

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

The present application provides methods and systems for operating a split exhaust engine system that provides blow-through air and exhaust gas recirculation to the intake port via a first exhaust manifold, and via a second exhaust manifold. Two exhaust manifolds provide exhaust to the exhaust tracts. In one example, the plurality of intake valves and couplings to the first exhaust gas may be adjusted in response to a transition from an estimated air-fuel content of combustion to a leaner air-fuel content of direct-blown air on a cylinder-by-cylinder basis. The amount of opening overlap between the manifold's first set of exhaust valves. As one example, the transition may be determined from the output of an oxygen sensor positioned within the first exhaust manifold or within the exhaust runner of each of the first set of exhaust valves.

Description

technical field [0001] The present specification generally relates to methods and systems for split-flow exhaust engines including exhaust gas recirculation. Background technique [0002] Engines may use boost devices, such as turbochargers, to increase engine power density. However, due to the increased combustion temperature, engine knock can occur. Knock is especially problematic under boost conditions due to high charge air temperatures. The present inventors have recognized that knocking can be reduced and engine efficiency improved by utilizing an engine system having a split-flow exhaust system in which a first exhaust manifold conveys exhaust gas recirculation (EGR) to the compressor of the turbocharger. upstream of the engine's intake, and wherein the second exhaust manifold conveys exhaust gas to the turbine of the turbocharger in the engine's exhaust. In such an engine system, each cylinder may include two intake valves and two exhaust valves, with a first set ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02F02D41/00
CPCF02D13/0257F02D13/0261F02D41/0007F02D41/0077F02D2041/001F02B25/145F02D13/0203F02D41/005F02D41/0087F02D41/064F02D41/08F02D41/12F02D2200/602F02D41/042F02D41/123F02N19/004F02M26/42F01N9/00F01N2560/025F01N2560/14F02M26/14F02M26/20F02M26/53F01N13/107F02D41/1458F02D41/1498Y02T10/12Y02T10/40B60W20/00
Inventor J·N·尤瑞G·苏尼拉
Owner FORD GLOBAL TECH LLC