Torotrak (development) Limited

Mervyn John Patterson

Christopher John Greenwood

Leslie Kendrick Robinson

Yudai Tatara

Masaki Inui

A variator assembly comprises a variator of the toroidal-race rolling-traction type using double-acting pistons to control the rollers and differential end load pressure to load the variator, and control means operative to vary the differential end load pressure in sympathy with changes in the net pressure exerted by the roller-control pistons so as to maintain the traction coefficient at the roller disc interface consistently below the limit at which traction would be lost.

Variator control system

A roller assembly (10) for use in a toroidal-race rolling-traction variator or like device includes a roller mounted in a carriage (19) which is provided with passageways (33) so that cooling oil from the variator lubrication circuit can be sprayed on to the roller rim via apertures in the carriage and/or in two specially-located spray-bars 38,39 extending from the carriage.

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Chorley, United Kingdom

Mervyn John Patterson