Travel control apparatus of hybrid vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorEiji MAEDA
Life of this patent
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Abstract
A travel control apparatus applied in a hybrid vehicle is provided with: a planetary gear mechanism capable of distributing power of an internal combustion engine to a first MG and an output unit, and a second MG capable of outputting power to the output unit. When a requested output to the internal combustion engine is zero, rotational speed control for controlling the first MG is executed so that the rotational speed of the internal combustion engine is higher than zero when the speed of the vehicle is equal to or greater than a predetermined control determination speed, and the execution of rotational speed control is prohibited when the speed of the vehicle is less than the control determination speed.
Claims6
A travel control apparatus applied to a hybrid vehicle, the hybrid vehicle comprising:
- an internal combustion engine;
- a first motor generator;
- an output unit for transmitting power to a drive wheel;
- a differential mechanism comprising three rotating elements which are mutually differentially rotatable, with, among the three rotating elements, a first rotating element being connected to the internal combustion engine, a second rotating element being connected to the first motor generator, and a third rotating element being connected to the output unit;
- and
- a second motor generator which is capable of outputting power to the output unit, wherein
- the travel control apparatus comprises a computer which is programmed to function as a control device by executing a computer program, the control device being configured to, when a requested output to the internal combustion engine is zero:
- when speed of the vehicle is greater than or equal to a predetermined control determination speed, control the first motor generator by executing rotational speed control so that the rotational speed of the internal combustion engine is higher than zero;
- and, when the speed of the vehicle is less than the predetermined control determination speed, control the first motor generator so that execution of the rotational speed control is prohibited, and
- the control determination speed is set to a speed at which energy loss of the vehicle occurring when the rotational speed control is not executed is greater than energy loss of the vehicle occurring when the rotational speed control is executed.
(canceled)
Dependencies are inferred from the claim text.