Method of managing the oil temperature of a transmission of a motor vehicle
AssigneeVolvo Truck Corporation
InventorsNicolas Granottier, Baptiste Boutin
Life of this patent
Estimating the term…
Abstract
The invention relates to a method of managing the oil temperature of a transmission of a motor vehicle, the transmission comprising a lubrication circuit and an oil cooling circuit, the oil temperature management circuit comprising a liquid/liquid heat exchanger mounted on the lubrication circuit, the lubrication circuit comprising a pump for circulating the oil in the lubrication circuit, and a temperature sensor wherein, before a starting stage of the vehicle, if the temperature of the oil is lower than a first value, the pump of the lubrication circuit is activated so as to circulate the oil in the liquid/liquid exchanger.
Claims11
A method for managing an oil temperature of a transmission of a motor vehicle, the transmission comprising:
- a lubrication circuit, and
- an oil temperature management circuit comprising:
- a liquid/liquid heat exchanger mounted on the lubrication circuit,
- the lubrication circuit comprising:
- a pump for circulating oil in the lubrication circuit,
- a vehicle start detection module connected to a user device that is actuated just prior to vehicle cold start, and
- a temperature sensor;
- wherein the method comprises, before a starting stage of the motor vehicle, determining an imminence of the vehicle start, determining whether the temperature of the oil is lower than a first value, and activating the pump of the lubrication circuit so as to circulate the oil in the liquid/liquid heat exchanger if the temperature of the oil is lower than the first value.
A lubrication circuit of a motor vehicle transmission comprising:
- a pump to circulate oil in the lubrication circuit,
- an oil temperature sensor,
- an oil temperature management circuit comprising a liquid/liquid heat exchanger, and
- a control unit connected to the pump, the oil temperature sensor and a vehicle start detection module connected to a user device that is actuated just prior to vehicle cold start,
- wherein the control unit is configured to activate the pump when the oil temperature is below a first temperature value before a starting stage of the motor vehicle and when the vehicle start detection module detects an imminent start of the motor vehicle.
Dependencies are inferred from the claim text.