Estimated torque calculation device of internal combustion engine and method thereof
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHideki Takamatsu
Life of this patent
Estimating the term…
Abstract
An ECU executes the step S100 of detecting an intake air amount QA and an ignition timing IT, the step S200 of calculating an estimated engine torque TE from QA and IT, the step S300 of detecting the engine rotation speed NE and the turbine rotation speed NT, the step S400 of calculating the speed ratio E of the torque converter 210, the step S500 of calculating a torque capacity C from the speed ratio, the step S600 of calculating a reference torque TP(0) from the torque capacity C, the step S700 correcting the reference torque TP(0) into TP based on a map, the step S900 setting TE as the estimated engine torque if TP is greater than TE, and the step S1000 setting TP as the estimated engine torque if TP is not greater than TE.
Claims20
An estimated torque calculation device that calculates an estimated torque of an internal combustion engine, comprising:
- a first torque calculation portion that calculates an output torque of the internal combustion engine as a first output torque based on a load of the internal combustion engine;
- a second torque calculation portion that calculates the output torque of the internal combustion engine as a second output torque based on a map in which a rotation speed of the internal combustion engine is a parameter;
- a numerical value calculation portion that calculates a numerical value based on a characteristic of a torque converter connected to the internal combustion engine;
- and
- a setting portion that sets one of the first output torque and the second output torque as the estimated torque based on the numerical value.
The estimated torque calculation device according to claim, 1, wherein the second torque calculation portion calculates the second output torque based on a map in which the rotation speed of the internal combustion engine and a temperature of the internal combustion engine are parameters, and a map in which the rotation speed of the internal combustion engine and a temperature of a working oil of an automatic transmission connected to the internal combustion engine via the torque converter are parameters.
An estimated torque calculation device that calculates an estimated torque of an internal combustion engine, comprising:
- a first torque calculation portion that calculates an output torque of the internal combustion engine as a first output torque based on a load of the internal combustion engine;
- a second torque calculation portion that calculates the output torque of the internal combustion engine as a second output torque based on a map in which a rotation speed of the internal combustion engine is a parameter;
- and
- a setting portion that sets one of the first output torque and the second output torque as the estimated torque based on a state of operation of the internal combustion engine.
A estimated torque calculation method that calculates an estimated torque of an internal combustion engine, comprising:
- calculating an output torque of the internal combustion engine as a first output torque based on a load of the internal combustion engine;
- calculating the output torque of the internal combustion engine as a second output torque based on a map in which a rotation speed of the internal combustion engine is a parameter;
- calculating a numerical value based on a characteristic of a torque converter connected to the internal combustion engine;
- and
- setting one of the first output torque and the second output torque as the estimated torque based on the numerical value.
Dependencies are inferred from the claim text.