cơ cấu Valvematic của toyota

Wilhelm Hannibal, Fachhochschule Südwestfalen, University of Applied Science, Iserlohn, Germany, hannibal@fh-swf.de Fig... Wilhelm Hannibal, Fachhochschule Südwestfalen, University of Ap

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Variable Valve Timing Systems on Modern Spark Ignition Engines in Series Production and under Development

Lecture at the the

B d t U i it

Budapest University

of Technology and Economics

Part A: September, 18, 2009 Part B: November, 24, 2009

Prof Dr.-Ing Wilhelm Hannibal,

Fachhochschule Südwestfalen, University of Applied Science,

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Presentation Outline

1 I t d ti

1 Introduction

2 Historical Overview of Variable Valve Train Systems

3 Categories of Variable Valve Actuation (VVA) Systems

4 Thermo Dynamical Benefits

5 Cam Phaser Systems

6 Valve Lift and Timing Variation Systems

7 „Palivaventi“ A New Patent and Literature VVA- Data Base

8 Future Systems

9 Conclusion and Outlook

Copyright: Prof Dr.-Ing Wilhelm Hannibal, Fachhochschule Südwestfalen, University of Applied Science, Iserlohn, Germany, hannibal@fh-swf.de Fig 2

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systems are applied

• a fuel consumption benefit of about

Copyright: Prof Dr.-Ing Wilhelm Hannibal, Fachhochschule Südwestfalen, University of Applied Science, Iserlohn, Germany, hannibal@fh-swf.de

and please enjoy the content

Fig 3

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1 I t d ti

1 Introduction

2 Historical Overview of Variable Valve Train Systems

8 Future Systems

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Historical Overview of Variable valve Train Systems

valve deactivation

system,

Gottlieb Daimler Gottlieb Daimler,

patent DE 50839, the first variable valve actuation system on series production cars?

June 9., 1889

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Patent Applications of Variable Valve Actuation Systems

• More than 15,000 patent applications have been submitted

• There are many different classification groups; for research work,

they have to be divided into practicable categories

• Patent searches are very time-consuming

• The level of invention in the applications has fallen

• Patent application strategy has become more important

• Many patent applications are submitted although their ideas are

l d k f ld t t already known from very old patents

• The strategic importance of the patents ensures the companies’ The strategic importance of the patents ensures the companies

ability to compete

• Patent research is one of the research fields of Prof Hannibal

Patent research is one of the research fields of Prof Hannibal

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From the Operational Principle to Series Production,

Cam Phasers from Samuel Haltenberger to Alfa Romeo and BMW

Samuel Haltenberger (Patent DE 368775, 1918)

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Cam Phasers from Samuel Haltenberger to Alfa Romeo and BMW

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Cam Switching Systems from Eaton to Cadillac

E t 1978 Cadillac 1978

Eaton, 1978 Cadillac, 1978

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Cam Switching Systems from Eaton to Honda

Eaton, Patent US 4,203,397,

1978

Honda VTEC, 1989

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Continuously Variable Valve Lift from Renault to BMW

Louis Renault BMW Valvetronic“ 2002

Louis Renault,

Patent DE 145662, 1902

BMW „Valvetronic , 2002

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Non Uniform Camshaft Drive from Mitchell to MG

Stephan W Mitchell, MG-VVC-system

Stephan W Mitchell,

Patent GB 2066361A, 1980

MG VVC system IAA- press release 1995

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1 I t d ti

1 Introduction

3 Categories of Variable Valve Actuation (VVA) Systems

8 Future Systems

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Categories of

VVA Systems

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Number of Patent Applications According to the VVA- Groups for the Years 1980 - 2000

1200

Camphasers

1054

978 1000

Camphasers

795 800

Mechanical Valve Train

A Valve Train Mitsubishi „MIVEC

• Porsche „VarioCAM Plus“

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Total Number of Patent Applications in the Data Base for the Years

1980 - 2000

450

314 343

383 336

361 350

213 183 168

231 200

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Number of Patent Applications According to the VVA- Groups for the Years 1989 to 1993

117

120

94 92

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1 I t d ti

1 Introduction

8 Future Systems

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Possibilities of Valve Varition

Crank angle [°CA]

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Range for Cam Phasing Variation

inlet valve lift

Crank angle [°CA]

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Torque Response with Several Cam Phasing Positions

late variable

Engine revolution [1/min]

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Torque Influence with Different Valve Opening Durations

Engine revolution [1/min]

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Reduction of Fuel Consumption

- Optimization of the Burning Process

- Reduction of the Friction

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Influence of the Reduction of Charge Cycle Work by the Use of

Variable Inlet Valve Duration

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Charge Cycle Work Reduction over Inlet Spread Variation with the Use of Variable Inlet Valve Duration (System UniValve ( y ® ) )

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Fuel Consumption over the Inlet Valve Spread Variation

Naturally Aspirated Engine: 2,0 l Test Engine with UniValve

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Fuel Consumption over the Inlet Valve Spread Variation;

Turbo Charged Engine: 2,0 l Test Engine with UniValve

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Influence of Fuel Consumption Reduction with different Variable

Valve Train Concepts for the Naturally Aspirated Engine

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Influence of Fuel Consumption Reduction with different Variable

Valve Train Concepts for the Turbo Charged Engine

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1 I t d ti

1 Introduction

8 Future Systems

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Categories of the Cam Phaser Systems

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Torque at the Camshaft for Different

Engine Concepts

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First Cam Phaser in Series Production by Alfa Romeo

1: cam shaft 6: solenoid 2: oil nut 7: hub of the gear 3: helical gear 8: gear

3: helical gear 8: gear 4: sprocket 9: hydraulic piston 5: control valve 10: return spring

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First Cam Phaser Solution in Series Production of Mercedes Benz in 1989

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Cam Phaser Solution VANOS of BMW

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Cam Phaser Solution of Porsche by Using the Principle of Chain

Length Variation

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First Porsche Cam Phaser in Series Production

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Hydraulical Circuit of the Porsche Cam Phaser Principle

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Unit of two Cam Phasers using the „Vane Type“ Principle

at the Volkswagen six cylinder engine

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Components of a Cam Phaser using the Vane Type Principle

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Von- Mises Stresses at the Stator and Rotor of a Cam Phaser with the Vane Type Principle

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System‘s Control Circuit of a Vane Type Cam Phaser for Spark

Ignition Engines

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Example of a Vane Type Cam Phaser with the Hydraulic Propotional Valve at the Front of the Cam Phaser

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CTA- Cam Phaser Principle of DELPHI

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Detail development at Cam Phaser- Systems,

the „VaneCam“ –System of the Hydraulik-Ring Company

Hydraulic y Locking pin damping

between rotor and

between rotor and rotor

housing [13]

rotor and rotor

housing

housing, [13]

g

VaneCAM camphaser with stator

in plastic

Electro hydraulic solenoid, [12]

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Price Reduction for Cam Phasers with New Technical Generations

120 100 120

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1 I t d ti

1 Introduction

6 Valve Lift and Timing Variation Systems

8 Future Systems

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Valve Lift and Timing Variations Systems

Valve Lift Variation in Steps

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Honda VTEC- System for Rocker Fingers;

the First Series Production Solution for Two Valve Contours

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Honda VTEC- System for a Rocker Arm Design in Motion

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Honda VTEC for Tappet Solutions

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Mitsubishi MIVEC System for Rocker Arm Solutions

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Mitsubishi MIVEC System

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