Abstract: A fluid system for a continuously variable transmission includes a first pump, a first actuation unit, a first line section, a second actuation unit, and a second line section. The first pump has a first sub-pump and a second sub-pump. The first actuation unit is assigned to a first disc set of the continuously variable transmission and the second actuation unit is assigned to a second disc set of the continuously variable transmission. The first line section fluidically connects the first pump to the first actuation unit and the second line section fluidically connects the first pump to the second actuation unit. The second sub-pump has a first connection that can be selectively fluidically connected to the first actuation unit via the first line section, or the second sub-pump has a second connection that can be selectively fluidically connected to the second actuation unit via the second line section.

Abstract: A fluid system for a continuously variable transmission includes a first pump, a first actuation unit, a first line section, a second actuation unit, and a second line section. The first pump has a first sub-pump and a second sub-pump. The first actuation unit is assigned to a first disc set of the continuously variable transmission and the second actuation unit is assigned to a second disc set of the continuously variable transmission. The first line section fluidically connects the first pump to the first actuation unit and the second line section fluidically connects the first pump to the second actuation unit. The second sub-pump has a first connection that can be selectively fluidically connected to the first actuation unit via the first line section, or the second sub-pump has a second connection that can be selectively fluidically connected to the second actuation unit via the second line section.

Abstract: A friction part includes a friction surface with a first friction zone, a second friction zone, and a first circumferentially extending groove band separating the first friction zone from the second friction zone in a radial direction. At least one dimension of the first friction zone, the second friction zone, or the first circumferentially extending groove band is optimized with respect to a cooling behavior of the frictionally operating device. In an example embodiment, the friction surface has a third friction zone and a second circumferentially extending groove band separating the second friction zone from the third friction zone. The first friction zone is a radially innermost friction zone and a first radial dimension of the first friction zone is approximately 1 to 2 times a sum of a second radial dimension of the second friction zone and a third radial dimension of the third friction zone.