US6553959B2 — Electronic flow control for a stratified EGR syst…

Claim 1

Independent Claim 154 words

An engine control system for a multi-port direct injection engine, comprising: a first camshaft having cam mechanisms that control first and second intake valves and a first exhaust valve for each of a plurality of cylinders; and a second camshaft having cam mechanisms that control a second exhaust valve for each of the plurality of cylinders; wherein the second camshaft is capable of phasing the second exhaust valve between an exhaust stroke and an intake stroke; wherein exhaust gases from the plurality of cylinders enter an exhaust manifold via the second exhaust valves when the second exhaust valves are phased with the exhaust stroke and exhaust gases from the exhaust manifold enters the plurality of cylinders via the second exhaust valves when the second exhaust valves are phased with the intake stroke; and wherein the second exhaust valves control exhaust gas flow to and from the plurality of cylinders via tangential exhaust gas ports.

Claim 2

Dependent Claim 154 words

An engine control system for a multi-port direct injection engine, comprising: a first camshaft having cam mechanisms that control first and second intake valves and a first exhaust valve for each of a plurality of cylinders; and a second camshaft having cam mechanisms that control a second exhaust valve for each of the plurality of cylinders; wherein the second camshaft is capable of phasing the second exhaust valve between an exhaust stroke and an intake stroke; wherein exhaust gases from the plurality of cylinders enter an exhaust manifold via the second exhaust valves when the second exhaust valves are phased with the exhaust stroke and exhaust gases from the exhaust manifold enters the plurality of cylinders via the second exhaust valves when the second exhaust valves are phased with the intake stroke; and wherein the second exhaust valves control exhaust gas flow to and from the plurality of cylinders via tangential exhaust gas ports.

Claim 3

Dependent Claim 53 words

The system of claim 1 , wherein the second intake valves control air intake into the plurality of cylinders via tangential intake ports; wherein the tangential intake ports circulate air in the plurality of cylinders and the tangential exhaust gas ports circulate exhaust gases around the circulating air in the plurality of cylinders.

Claim 4

Dependent Claim 155 words

An engine control system for a multi-port direct injection engine, comprising: a first camshaft having cam mechanisms that control first and second intake valves and a first exhaust valve for each of a plurality of cylinders; and a second camshaft having cam mechanisms that control a second exhaust valve for each of the plurality of cylinders; wherein the second camshaft is capable of phasing the second exhaust valve between an exhaust stroke and an intake stroke; wherein exhaust gases from the plurality of cylinders enter an exhaust manifold via the second exhaust valves when the second exhaust valves are phased with the exhaust stroke and exhaust gases from the exhaust manifold enters the plurality of cylinders via the second exhaust valves when the second exhaust valves are phased with the intake stroke; and wherein the second exhaust valves control exhaust gas glow to and from the plurality of cylinders via helical swirl exhaust gas ports.

Claim 5

Dependent Claim 155 words

An engine control system for a multi-port direct injection engine, comprising: a first camshaft having cam mechanisms that control first and second intake valves and a first exhaust valve for each of a plurality of cylinders; and a second camshaft having cam mechanisms that control a second exhaust valve for each of the plurality of cylinders; wherein the second camshaft is capable of phasing the second exhaust valve between an exhaust stroke and an intake stroke; wherein exhaust gases from the plurality of cylinders enter an exhaust manifold via the second exhaust valves when the second exhaust valves are phased with the exhaust stroke and exhaust gases from the exhaust manifold enters the plurality of cylinders via the second exhaust valves when the second exhaust valves are phased with the intake stroke; and wherein the second exhaust valves control exhaust gas glow to and from the plurality of cylinders via helical swirl exhaust gas ports.

Claim 6

Dependent Claim 56 words

The system of claim 3 , wherein the second intake valves control air intake into the plurality of cylinders via helical swirl intake ports; wherein the helical swirl intake ports circulate air in the plurality of cylinders and the helical swirl exhaust gas ports circulate exhaust gases around the circulating air in the plurality of cylinders.

Claim 7

Dependent Claim 95 words

The system of claim 4 , further comprising: an air intake deflector for each cylinder that guides an air-fuel mixture into a center region of each of the plurality of cylinders via the helical swirl intake ports; and an exhaust gas deflector for each cylinder that guides exhaust gases into an outer region the plurality of cylinders via the helical swirl exhaust gas ports, wherein the outer region encircles the center region, wherein the exhaust gas and the air-fuel mixture rotate in each cylinders in the same direction and at substantially similar rates of rotations.

Claim 8

Dependent Claim 30 words

The system of claim 5 , wherein the first exhaust valve exhausts gas into a first exhaust manifold and the second exhaust valve exhausts gas into a second exhaust manifold.

Claim 9

Dependent Claim 38 words

The system of claim 6 , further comprising an intake manifold that comprises an electronic intake flow valve for each cylinder that controls air flow into each of the plurality of cylinders via the helical swirl intake ports.

Claim 10

Dependent Claim 37 words

The system of claim 7 , wherein the second exhaust manifold comprises an electronic exhaust gas flow valve that controls exhaust gas flow into each of the plurality of cylinders via the helical swirl exhaust gas ports.

Claim 11

Dependent Claim 23 words

The system of claim 8 , wherein the intake manifold further comprises a electronic valve actuator that controls the electronic intake flow valves.

Claim 12

Dependent Claim 35 words

The system of claim 8 , wherein the intake manifold further comprises a port de-activation valve for each cylinder that controls air flow into each of the plurality of cylinders via the first intake ports.

Claim 13

Dependent Claim 16 words

The system of claim 10 , wherein the port de-activation valves each comprise a butterfly valve.

Claim 14

Dependent Claim 16 words

The system of claim 10 , wherein the port de-activation valves each comprise a rotary valve.

Claim 15

Dependent Claim 42 words

The system of claim 10 , further comprising: an electronic intake valve actuator that controls the intake flow valves; and an intake flow valve position sensor that provides indications of positions of the port de-activation valves and the electronic intake flow valves.

Claim 16

Dependent Claim 44 words

The system of claim 13 , further comprising: a first exhaust manifold that receives exhaust gas from the cylinders via the straight exhaust gas ports; and a second exhaust manifold that receives exhaust gas from the cylinders via the helical swirl exhaust gas ports.

Claim 17

Dependent Claim 22 words

The system of claim 14 , further comprising: an exhaust plenum that receives exhaust gas from the first and second exhaust manifolds.

Claim 18

Dependent Claim 31 words

The system of claim 15 , further comprising: an ignition device for each cylinder located between the helical swirl intake port and the helical swirl exhaust gas port on each cylinder.

Claim 19

Dependent Claim 17 words

The system of claim 16 , wherein the ignition device comprises an integrated fuel injector and igniter.

Claim 20

Dependent Claim 175 words

A direct injection spark initiated internal combustion engine having a plurality of cylinders, where each cylinder comprises a first and second intake port and first and second exhaust ports, the engine comprising: a first intake manifold that comprises a first flow valve that controls the air flow into the first intake ports; a second intake manifold that comprises a second flow valve that controls the air flow into the second intake ports; a first exhaust gas manifold that receives exhaust gas from the cylinders via the first exhaust ports; a camshaft that can phase an exhaust valve for each of the second exhaust ports from an intake stoke to an exhaust stroke; and a second exhaust gas manifold that receives exhaust gas from the cylinders via the second exhaust ports when the exhaust valves are phased with the exhaust stroke, wherein the second exhaust gas manifold comprises a third flow valve that controls the exhaust gas flow into the cylinders via the second exhaust ports when the exhaust valves are phased with the intake stroke.

Claim 21

Dependent Claim 175 words

A direct injection spark initiated internal combustion engine having a plurality of cylinders, where each cylinder comprises a first and second intake port and first and second exhaust ports, the engine comprising: a first intake manifold that comprises a first flow valve that controls the air flow into the first intake ports; a second intake manifold that comprises a second flow valve that controls the air flow into the second intake ports; a first exhaust gas manifold that receives exhaust gas from the cylinders via the first exhaust ports; a camshaft that can phase an exhaust valve for each of the second exhaust ports from an intake stoke to an exhaust stroke; and a second exhaust gas manifold that receives exhaust gas from the cylinders via the second exhaust ports when the exhaust valves are phased with the exhaust stroke, wherein the second exhaust gas manifold comprises a third flow valve that controls the exhaust gas flow into the cylinders via the second exhaust ports when the exhaust valves are phased with the intake stroke.

Claim 22

Dependent Claim 26 words

The engine of claim 18 , wherein the second intake ports comprise helical intake ports and the second exhaust ports comprise helical exhaust gas intake ports.

Claim 23

Dependent Claim 17 words

The engine of claim 19 , wherein the engine is a radially stratified exhaust gas re-circulation engine.

Claim 24

Dependent Claim 168 words

A spark initiated internal combustion engine, comprising: a plurality of cylinders that each comprise first and second intake ports and first and second exhaust ports; a camshaft that controls an exhaust gas re-circulation valve for each of the second exhaust ports, wherein the camshaft can phase the exhaust gas re-circulation valves from an intake stroke to an exhaust stroke; and an intake flow valve for each cylinder that controls air flow into the cylinders via the second intake ports and an exhaust gas re-circulation valve that controls exhaust gas flow into the cylinders via the second exhaust ports; wherein the exhaust gas re-circulation valves allow exhaust gas to enter the cylinders via the second exhaust port when the camshaft is phased with the intake stroke and allow exhaust gas to escape from the cylinders when the camshaft is phased with the intake stroke; and wherein the intake flow valves and exhaust gas re-circulation valves are adjusted to fill each cylinder with a combination of air and exhaust gas.

Claim 25

Dependent Claim 168 words

A spark initiated internal combustion engine, comprising: a plurality of cylinders that each comprise first and second intake ports and first and second exhaust ports; a camshaft that controls an exhaust gas re-circulation valve for each of the second exhaust ports, wherein the camshaft can phase the exhaust gas re-circulation valves from an intake stroke to an exhaust stroke; and an intake flow valve for each cylinder that controls air flow into the cylinders via the second intake ports and an exhaust gas re-circulation valve that controls exhaust gas flow into the cylinders via the second exhaust ports; wherein the exhaust gas re-circulation valves allow exhaust gas to enter the cylinders via the second exhaust port when the camshaft is phased with the intake stroke and allow exhaust gas to escape from the cylinders when the camshaft is phased with the intake stroke; and wherein the intake flow valves and exhaust gas re-circulation valves are adjusted to fill each cylinder with a combination of air and exhaust gas.

Claim 26

Dependent Claim 32 words

The engine of claim 21 , wherein the combination of air and exhaust gas in the cylinders comprises more exhaust gas and less air when the engine is operated at lighter loads.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2006-04-28	2006-10-28	2007-04-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2010-04-28	2010-10-28	2011-04-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2014-04-28	2014-10-28	2015-04-29	$7700.00	Window Closed / Lapsed

Electronic flow control for a stratified EGR system

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