Zeroshift Information & Zeroshift Links at HealthHaven.com

Transmission types
Manual Sequential manual Non-synchronous
Automatic Manumatic
Semi-automatic Electrohydraulic Dual clutch Saxomat Zeroshift
Continuously variable
Bicycle gearing Derailleur gears Hub gears
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Zeroshift or seamless-shift gearbox is a type of automotive transmission which allows for changing gear without interruption of torque to the driving roadwheels. The Zeroshift principle was invented by Bill Martin, the company Zeroshift Ltd is based in Milton Keynes, England.

The Zeroshift gear system has demonstrated superior performance over a manual transmission,^{[citation needed]} which must disengage the engine from the driving wheels to prevent drivetrain wear. An automatic transmission can waste power due to its torque converter if unlocked,^{[citation needed]} and usually provides inferior performance compared to a manual.^{[citation needed]}

Currently the Zeroshift transmission is under development,^{[citation needed]} and a volume production non-exclusive licence has been sold to an undisclosed global transmission manufacturer.^{[citation needed]} The Zeroshift principle has been demonstrated on a number of the company’s development vehicles.^{[citation needed]} It is expected that the Zeroshift transmission may be a replacement for current semi-automatic transmission.^{[citation needed]}

[edit] Method of operation

The Zeroshift transmission is mechanically similar to a manual transmission with all parts other than the synchro's being the same.^{[citation needed]} The Zeroshift gearbox is operated by "bullets" which engage and disengage the gears.^{[citation needed]} Each set of gears has two bullets: a drive bullet and an overdrive bullet.

Change Sequence^{[citation needed]}

Bullets engage 1st gear
Bullets requested to engage 2nd gear, only the overdrive bullet is free to move to engage 2nd gear
2nd bullet engages dog on 2nd gear cog in position, 1st gear bullet is held engaging drive in 1st gear under load due to retention angle on the 1st gear dog
2nd gear picks up drive
2nd gear overdrives first gear
1st gear bullet disengages dog and moves to 2nd gear.

[edit] See also

powershifting

[edit] References

[edit] External links

Zeroshift.com official website
Zeroshift Sport Compact Car article Jan 2006PDF (249 KB)

Contents

[edit] Method of operation

[edit] See also

[edit] References

[edit] External links