Clutch hydraulic system for vehicle
AssigneeNissan Motor Co., Ltd.
InventorsTakashi Kuwahara, Shigeru Ishii
Life of this patent
Estimating the term…
Abstract
A vehicle clutch hydraulic system for a vehicle is provided with a mechanical oil pump, an electric oil pump, a forward clutch and a control valve unit. In the vehicle clutch hydraulic system, a main pump oil passage fluidly connects the mechanical oil pump to the control valve unit. A sub-pump oil passage fluidly connects the electric oil pump to a forward clutch oil passage into which an oil passage outlet opens at an inside location closer to a clutch rotational axis than a clutch oil chamber of the forward clutch.
Claims10
A vehicle clutch hydraulic system for a vehicle, comprising:
- a mechanical oil pump configured to be actuated by a rotary drive shaft of a drive system;
- an electric oil pump configured to be actuated by an electric motor independent of actuation of the mechanical oil pump;
- a clutch configured to be disposed in the drive system, the clutch being operated by hydraulic pressure supplied from the mechanical oil pump and the electric oil pump as a hydraulic power source for the clutch;
- a control valve unit configured to provide engagement oil pressure and lubricating oil pressure to the clutch based on a pump discharge pressure from the hydraulic power source;
- a main pump oil passage fluidly connecting the mechanical oil pump to the control valve unit;
- and
- a sub-pump oil passage fluidly connecting the electric oil pump to a clutch oil passage arranged to supply hydraulic oil to a clutch oil chamber of the clutch,
- the clutch oil passage being formed inside an L-shaped plate member and including a first radial oil passage portion and an axial oil passage portion, the first radial oil passage portion extending in a radial direction of the clutch and being connected to the sub-pump oil passage, the axial oil passage portion extending toward the clutch in an axial direction of the clutch from a radially inward end of the first radial oil passage portion,
- the clutch oil passage further including an oil passage outlet that opens at a radially inward location closer to a clutch rotational axis than the clutch oil chamber.
A vehicle clutch hydraulic system for a vehicle, comprising:
- a mechanical oil pump configured to be actuated by a rotary drive shaft of a drive system;
- an electric oil pump configured to be actuated by an electric motor independent of actuation of the mechanical oil pump;
- a clutch configured to be disposed in the drive system, the clutch being operated by hydraulic pressure supplied from the mechanical oil pump and the electric oil pump as a hydraulic power source for the clutch;
- a control valve unit configured to provide engagement oil pressure and lubricating oil pressure to the clutch based on a pump discharge pressure from the hydraulic power source;
- a main pump oil passage fluidly connecting the mechanical oil pump to the control valve unit;
- and
- a sub-pump oil passage fluidly connecting the electric oil pump to a clutch oil passage having an oil passage outlet that opens at a radially inward location closer to a clutch rotational axis than a clutch oil chamber of the clutch, the clutch oil passage supplying hydraulic oil to the clutch oil chamber;
- a clutch temperature sensor configured to detect a temperature of the clutch;
- and
- a clutch cooling controller programmed to actuate the electric motor of the electric oil pump upon the clutch temperature sensor detecting a temperature of the clutch is at a predetermined temperature or higher.
Dependencies are inferred from the claim text.