Power train device of vehicle
AssigneeMazda Motor Corporation
InventorsNarihito Hongawara, Takuya Sugisawa, Keitaro Kageyama, Satoshi Fujikawa, Hiroki Tanabe, Shingo Kodama
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Abstract
A power train device of a vehicle includes an engine and an automatic transmission. The automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming a power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state. The multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among multiple friction fastening elements, and the predetermined brake is fastened before a fuel supply upon an engine start.
Claims6
A power train device of a vehicle, comprising:
- an engine;
- and
- an automatic transmission including multiple planetary gear mechanisms and multiple friction fastening elements and forming a power transmission path for transmitting power from the engine to a drive wheel,
- wherein the automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming the power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state,
- the multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among the multiple friction fastening elements,
- the predetermined brake is fastened before a fuel supply upon an engine start,
- a clutch to be fastened upon a non-supply of hydraulic pressure and released upon a supply of the hydraulic pressure is provided between the engine and the automatic transmission, and
- the clutch is fastened upon the engine start.
A power train device of a vehicle, comprising:
- an engine;
- and
- an automatic transmission including multiple planetary gear mechanisms and multiple friction fastening elements and forming a power transmission path for transmitting power from the engine to a drive wheel,
- wherein the automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming the power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state,
- the multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among the multiple friction fastening elements, and
- the predetermined brake is fastened by an electric oil pump before a fuel supply upon an engine start.
A power train device of a vehicle, comprising:
- an engine;
- an automatic transmission including multiple planetary gear mechanisms and multiple friction fastening elements and forming a power transmission path for transmitting power from the engine to a drive wheel;
- and
- a motor configured to rotate the engine,
- wherein the automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming the power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state,
- the multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among the multiple friction fastening elements,
- the predetermined brake is fastened before a fuel supply upon an engine start, and
- upon the engine start, the engine is started after the motor increases an engine speed to a predetermined cranking rotation speed as higher rotation than a predetermined resonant rotation speed with which a drive system from the engine to the drive wheel resonates and lower rotation than a predetermined idling rotation speed.
Dependencies are inferred from the claim text.