Heat load estimation device and heat load estimation method for friction engaging element
US11519495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2021 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jun 18, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2082
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A heat load estimation device for a friction engaging element that estimates a heat load when at least one of a temperature, a heat generation amount, and presence or absence of seizure in the friction engaging element at a time of shifting of the transmission is regarded as the heat load, includes a storage device and an execution device. The storage device stores mapping data defining mapping. The mapping includes, as an input variable, a speed variable that is a variable indicating a relative rotation speed of members of the friction engaging element and a hydraulic pressure variable that is a variable indicating hydraulic pressure during the shifting of the transmission, and includes, as an output variable, the heat load. The execution device executes a calculation process for calculating a value of the output variable and a change process for changing an execution mode of the calculation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.