Partition plate

Patent metadata

Field	Value
Publication number	US-10815944-B2
Application number	US-201916371581-A
Country	US
Kind code	B2
Filing date	Apr 1, 2019
Priority date	Mar 28, 2017
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A partition plate is configured to separate an intake passage formed by an intake pipe to be coupled to a combustion chamber into a first intake passage and a second intake passage. The first intake passage is openable and closable by a valve. A shape of a first cross section orthogonal to an extending direction of the intake pipe is set on the basis of a shape of a surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween.

First claim

The invention claimed is:

1. A partition plate configured to separate an intake passage formed by an intake pipe to be coupled to a combustion chamber into a first intake passage and a second intake passage, the first intake passage being openable and closable by a valve,
wherein a shape of a first cross section orthogonal to an extending direction of the intake pipe is calculated based at least in part on a shape of a surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween,
wherein the shape of the first cross section is calculated based at least in part on a shape of the combustion chamber,
wherein the shape of the first cross section satisfies an expression indicated below:
Lb ( Yp,l )= Ip ( Yp,l )+ a·La ( x ,θ)+ b

where Lb(Yp, l) denotes the shape of the first cross section, Ip(Yp, l) denotes the shape of the surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween, La(x, θ) denotes a length in a circumferential direction along a wall surface of the combustion chamber in a second cross section including a first direction corresponding to an axial direction of a cylinder bore of an engine and a second direction extending from an intake side toward an exhaust side of the combustion chamber, a and b denote predetermined coefficients, Yp denotes any position in a longitudinal direction in the first cross section, l denotes any position in the extending direction, and θ denotes a crank angle of the engine.

2. A partition plate configured to separate an intake passage formed by an intake pipe to be coupled to a combustion chamber into a first intake passage and a second intake passage, the first intake passage being openable and closable by a valve,
wherein a shape of a first cross section orthogonal to an extending direction of the intake pipe is calculated based at least in part on a shape of a surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween
wherein the shape of the first cross section is calculated based at least in part on a shape of the combustion chamber,
wherein the shape of the first cross section is calculated based at least in part on a length in a circumferential direction along a wall surface of the combustion chamber in a second cross section including a first direction corresponding to an axial direction of a cylinder bore of an engine and a second direction extending from an intake side toward an exhaust side of the combustion chamber,
wherein the shape of the first cross section satisfies an expression indicated below:
Lb ( Yp,l )= Ip ( Yp,l )+ a·La ( x ,θ)+ b

where Lb(Yp, l) denotes the shape of the first cross section, Ip(Yp, l) denotes the shape of the surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween, La(x, θ) denotes a length in a circumferential direction along a wall surface of the combustion chamber in a second cross section including a first direction corresponding to an axial direction of a cylinder bore of an engine and a second direction extending from an intake side toward an exhaust side of the combustion chamber, a and b denote predetermined coefficients, Yp denotes any position in a longitudinal direction in the first cross section, l denotes any position in the extending direction, and θ denotes a crank angle of the engine.

3. A partition plate configured to separate an intake passage formed by an intake pipe to be coupled to a combustion chamber into a first intake passage and a second intake passage, the first intake passage being openable and closable by a valve,
wherein a shape of a first cross section orthogonal to an extending direction of the intake pipe is calculated based at least in part on a shape of a surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween,
wherein the shape of the first cross section satisfies an expression indicated below:
Lb ( Yp,l )= Ip ( Yp,l )+ b

where Lb(Yp, l) denotes the shape of the first cross section, Ip(Yp, l) denotes the shape of the surface of the intake pipe that faces the partition plate with the second intake passage interposed therebetween, b denotes a predetermined coefficient, Yp denotes any position in a longitudinal direction in the first cross section, and l denotes any position in the extending direction.

4. The partition plate according to claim 3 ,
wherein the shape of the first cross section is calculated based at least in part on a shape of the combustion chamber.

5. The partition plate according to claim 4 ,
wherein the shape of the first cross section is calculated based at least in part on a length in a circumferential direction along a wall surface of the combustion chamber in a second cross section including a first direction corresponding to an axial direction of a cylinder bore of an engine and a second direction extending from an intake side toward an exhaust side of the combustion chamber.

Assignees

• Subaru Corp

Inventors

• Kato Masaaki

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B31/04 Primary

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• F02M35/10262 Primary

  Flow guides, obstructions, deflectors or the like (for generating a charge motion in the cylinder F02B31/00; for re-atomising condensed fuel or homogenising fuel-air mixture F02M29/00) · CPC title

• F02M35/10124

  Ducts with special cross-sections, e.g. non-circular cross-section · CPC title

• F02M35/10255

  Arrangements of valves; Multi-way valves (F02M35/10032 takes precedence; valves in the plenum chamber F02M35/10065; check valves F02M35/10275) · CPC title