Design consideration and potential of the Milner CVT

Adrian Hunt; Sam Akehurst; Stuart Schaaf

Design consideration and potential of the Milner CVT

Adrian Hunt, Sam Akehurst, Stuart Schaaf

Department of Mechanical Engineering

Research output: Contribution to conference › Paper

1 Citation (Scopus)

Abstract

The Milner continuously variable transmission (MCVT) is a transmission device based on rolling contacts analogous to those found in an angular contact roller bearing. The MCVT is particularly applicable to very high power density applications or those with very demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. Initial testing of a 12kW MCVT prototype was undertaken in 1999 with promising results [1]. This lead to the further development and testing of a 2 nd prototype MCVT rated to 60kW, however the design target of this device was not achieved and performance was hampered by a loss of traction capacity compared to the design specification. The work presented in this paper highlights work undertaken on a full dynamic simulation and analysis of the MCVT and identifies the failure mode of the 2nd MCVT prototype and as a result a redesign of this device has been undertaken such that it can obtain its original design targets.

Original language	English
Pages	51-66
Number of pages	16
Publication status	Published - 2006
Event	IPDS 2006: Integrated Powertrain and Driveline Systems 2006 - Dunton, Essex, UK United Kingdom Duration: 14 Jun 2006 → 15 Jun 2006

Conference

Conference	IPDS 2006: Integrated Powertrain and Driveline Systems 2006
Country	UK United Kingdom
City	Dunton, Essex
Period	14/06/06 → 15/06/06

Keywords

Product design
Computer simulation
Traction (friction)
Rolling
Bearings (machine parts)
Variable speed transmissions

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Projects

1 Finished

LEAN POWERTRAIN DEVELOPMENT TOOL (LPDEV)

Akehurst, S.

Engineering and Physical Sciences Research Council

1/03/06 → 28/02/09

Project: Research council

Cite this

Hunt, A., Akehurst, S., & Schaaf, S. (2006). Design consideration and potential of the Milner CVT. 51-66. Paper presented at IPDS 2006: Integrated Powertrain and Driveline Systems 2006, Dunton, Essex, UK United Kingdom.

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abstract = "The Milner continuously variable transmission (MCVT) is a transmission device based on rolling contacts analogous to those found in an angular contact roller bearing. The MCVT is particularly applicable to very high power density applications or those with very demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. Initial testing of a 12kW MCVT prototype was undertaken in 1999 with promising results [1]. This lead to the further development and testing of a 2 nd prototype MCVT rated to 60kW, however the design target of this device was not achieved and performance was hampered by a loss of traction capacity compared to the design specification. The work presented in this paper highlights work undertaken on a full dynamic simulation and analysis of the MCVT and identifies the failure mode of the 2nd MCVT prototype and as a result a redesign of this device has been undertaken such that it can obtain its original design targets.",

keywords = "Product design, Computer simulation, Traction (friction), Rolling, Bearings (machine parts), Variable speed transmissions",

author = "Adrian Hunt and Sam Akehurst and Stuart Schaaf",

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AU - Hunt, Adrian

AU - Akehurst, Sam

AU - Schaaf, Stuart

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N2 - The Milner continuously variable transmission (MCVT) is a transmission device based on rolling contacts analogous to those found in an angular contact roller bearing. The MCVT is particularly applicable to very high power density applications or those with very demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. Initial testing of a 12kW MCVT prototype was undertaken in 1999 with promising results [1]. This lead to the further development and testing of a 2 nd prototype MCVT rated to 60kW, however the design target of this device was not achieved and performance was hampered by a loss of traction capacity compared to the design specification. The work presented in this paper highlights work undertaken on a full dynamic simulation and analysis of the MCVT and identifies the failure mode of the 2nd MCVT prototype and as a result a redesign of this device has been undertaken such that it can obtain its original design targets.

AB - The Milner continuously variable transmission (MCVT) is a transmission device based on rolling contacts analogous to those found in an angular contact roller bearing. The MCVT is particularly applicable to very high power density applications or those with very demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. Initial testing of a 12kW MCVT prototype was undertaken in 1999 with promising results [1]. This lead to the further development and testing of a 2 nd prototype MCVT rated to 60kW, however the design target of this device was not achieved and performance was hampered by a loss of traction capacity compared to the design specification. The work presented in this paper highlights work undertaken on a full dynamic simulation and analysis of the MCVT and identifies the failure mode of the 2nd MCVT prototype and as a result a redesign of this device has been undertaken such that it can obtain its original design targets.

KW - Product design

KW - Computer simulation

KW - Traction (friction)

KW - Rolling

KW - Bearings (machine parts)

KW - Variable speed transmissions

M3 - Paper

SP - 51

EP - 66

T2 - IPDS 2006: Integrated Powertrain and Driveline Systems 2006

Y2 - 14 June 2006 through 15 June 2006

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