Method for estimating the initial temperature of a mechanical member of a vehicle at the start-up of the vehicle

摘要

A system estimating temperature of a mechanical member of a vehicle once the vehicle has stopped, including: a temperature sensor of a first element of the vehicle, for example a fluid tank; a mechanism estimating air temperature outside the vehicle; a first module estimating temperature of the member when the vehicle is moving; a mechanism storing, while the vehicle is stopped, an outside air temperature, a temperature of the first element, and a temperature of the member; a second module to calculate how long the vehicle has been stopped according to the outside air temperature, the stored temperature of the first element, and the measured temperature of the first element; and a third module to calculate thermal history of temperature variation of the member while the vehicle is stopped, according to the outside air temperature, the stored temperature of the member, and the stoppage time of the vehicle.

主权项

1. A system for estimating temperature of a mechanical member of a vehicle after the vehicle is stopped, comprising:
a temperature sensor of a first element of the vehicle; a means of estimating temperature of air outside the vehicle; a first module estimating temperature of the member while the vehicle is traveling;
a means of storing, while the vehicle is stopped, of an outside air temperature value, a temperature value of the first element, and a temperature value of the member; a second module configured to estimate a stoppage period of the vehicle based on the outside air temperature value, the stored temperature of the first element, and a measured temperature of the first element; and
a third module configured to estimate a continuous thermal history of temperature variation of the member for all points in time while the vehicle is stopped, based on the outside air temperature value, the stored temperature of the member, and the stoppage period of the vehicle estimated by the second module;wherein the third module is configured to calculate a change in temperature of the member during a preset period after the vehicle is stopped, then to switch off until another vehicle start-up.