IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0392187
(2003-03-20)
|
우선권정보 |
JP-0107070 (2002-04-09) |
발명자
/ 주소 |
- Kawai, Takashi
- Tsujii, Hiroshi
- Kuretake, Ken
- Sugiura, Masanori
- Hanada, Hideto
|
출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
6 |
초록
▼
The braking force control apparatus for a vehicle which has a function of applying a braking force to the vehicle by rotational resistance of the engine, by stopping the fuel supply to the engine during coasting of the vehicle and by controlling a torque capacity of a torque capacity control device
The braking force control apparatus for a vehicle which has a function of applying a braking force to the vehicle by rotational resistance of the engine, by stopping the fuel supply to the engine during coasting of the vehicle and by controlling a torque capacity of a torque capacity control device that is provided between the engine and a wheel so that the torque capacity becomes equal to or higher than a predetermined value, and of decreasing the torque capacity of the torque capacity control device when a predetermined condition is satisfied, and has a function of applying the braking force to the vehicle by a function of an electric power generator which is coupled with the wheel such that power can be transmitted. The braking force control apparatus includes braking force control means which increases a braking force that is generated by the function of the electric power generator when the torque capacity of the torque capacity control device is decreased.
대표청구항
▼
1. A braking force control apparatus for a vehicle, comprising:an engine; a fuel supply control device which controls a fuel supply to the engine during coasting of the vehicle; a torque capacity control device which is provided between the engine and a wheel, and which controls a torque capacity be
1. A braking force control apparatus for a vehicle, comprising:an engine; a fuel supply control device which controls a fuel supply to the engine during coasting of the vehicle; a torque capacity control device which is provided between the engine and a wheel, and which controls a torque capacity between the engine and the wheel; an electric power generator that is coupled with the wheel such that power can be transmitted; and a braking force control device which applies to the vehicle a braking force through rotational resistance of the engine, by stopping the fuel supply to the engine during coasting of the vehicle and by controlling the torque capacity so that the torque capacity becomes equal to or higher than a predetermined value, and which decreases the torque capacity and increases a braking force generated by the electric power generator when a predetermined condition is satisfied, wherein, when the torque capacity is decreased, the braking force control device increases the braking force generated by the electric power generator compared with a braking force generated by the electric power generator which is obtained before or when the torque capacity is decreased. 2. The control apparatus according to claim 1 wherein, the braking force control device decreases the braking force generated by the electric power generator with time.3. The control apparatus according to claim 1, further comprising:an estimation portion which estimates a total braking force when the torque capacity of the torque capacity control device is decreased, and the braking force generated by the electric power generator is increased; and a fuel supply portion which determines time for supplying the fuel to the engine based on a result of estimation obtained by the estimation portion. 4. The control apparatus according to claim 3, further comprising:a comparison portion which compares the total braking force that is estimated by the estimation portion with a total braking force before the torque capacity of the torque capacity control device is decreased, wherein the fuel supply portion starts the fuel supply to the engine based on a result of a comparison between the total braking force that is estimated by the estimation portion and the total braking force before the torque capacity of the torque capacity control device is decreased, before the torque capacity of the torque capacity control device is decreased. 5. The control apparatus according to claim 1, wherein a regenerative braking force is included in the braking force generated by a function of the electric power generator.6. The control apparatus according to claim 1, wherein the torque capacity control device is a torque converter with a lockup clutch which is engaged or disengaged such that torque transmission between the engine and the wheel is mechanically connected or cut off, and the braking force control device stops the fuel supply to the engine during coasting of the vehicle by the fuel supply control device, engages the lockup clutch so as to apply the braking force to the vehicle by the rotational resistance of the engine, and when the predetermined condition is satisfied, the braking force control device disengages the lockup clutch and increases the braking force generated by the electric power generator.7. The control apparatus according to claim 1, wherein the braking force control device suppresses a decrease in the total braking force, which is a sum of the braking force by the rotational resistance of the engine and the braking force generated by the electric power generator, by increasing the braking force generated by the electric power generator when the predetermined condition is satisfied.8. The control apparatus according to claim 1, wherein the predetermined condition includes a case where a vehicle speed becomes equal to or lower than a predetermined value.9. A braking force control apparatus for a vehicle, comprising:an engine; a fuel supply control means for controlling a fuel supply to the engine during coasting of the vehicle; a torque capacity control means which is provided between the engine and a wheel, and for controlling a torque capacity between the engine and the wheel; an electric power generator that is coupled with the wheel such that power can be transmitted; and a braking force control means for applying to the vehicle a braking force through rotational resistance of the engine, by stopping the fuel supply to the engine during coasting of the vehicle and by controlling the torque capacity so that the torque capacity becomes equal to or higher than a predetermined value, and which decreases the torque capacity and increases a braking force generated by the electric power generator when a predetermined condition is satisfied, wherein, when the torque capacity is decreased, the braking force control device increases the braking force generated by the electric power generator compared with a braking force generated by the electric power generator which is obtained before or when the torque capacity is decreased. 10. The control apparatus according to claim 9 wherein, the braking force control means decreases the braking force generated by the electric power generator with time.11. The control apparatus according to claim 9, further comprising:an estimation means for estimating a total braking force when the torque capacity of the torque capacity control means is decreased, and the braking force generated by the electric power generator is increased; and a fuel supply means for determining time for supplying the fuel to the engine based on a result of estimation obtained by the estimation means. 12. The control apparatus according to claim 11, further comprising:a comparison means for comparing the total braking force that is estimated by the estimation means with a total braking force before the torque capacity of the torque capacity control means is decreased, wherein the fuel supply means starts the fuel supply to the engine based on a result of a comparison between the total braking force that is estimated by the estimation means and the total braking force before the torque capacity of the torque capacity control means is decreased, before the torque capacity of the torque capacity control means is decreased. 13. A method of controlling a braking force of a vehicle which includes a torque capacity control device that is provided between an engine and a wheel, and an electric power generator that is coupled with the wheel such that power can be transmitted, comprising:applying to the vehicle a braking force through rotational resistance of the engine, by stopping fuel supply to the engine during coasting of the vehicle and by controlling a torque capacity of the torque capacity control device so that the torque capacity becomes equal to or higher than a predetermined value, and decreasing the torque capacity of the torque capacity control device and increasing a braking force generated by the electric power generator when a predetermined condition is satisfied, wherein, when the torque capacity is decreased, the braking force control device increases the braking force generated by the electric power generator compared with a braking force generated by the electric power generator which is obtained before or when the torque capacity is decreased. 14. The control method according to claim 13, wherein the braking force generated by the electric power generator is decreased with time.15. The control method according to claim 13, further comprising the steps of:decreasing the torque capacity of the torque capacity control device, and estimating a total braking force when the braking force generated by the electric power generator is increased, and determining time for supplying the fuel to the engine based on a result of the estimation. 16. The control method according to claim 15, further comprising the step of:comparing the estimated total braking force with a total braking force before the torque capacity of the torque capacity control device is decreased, wherein the determination portion determines the fuel supply to the engine based on a result of the comparison between the estimated total braking force and the total braking force before the torque capacity of the torque capacity control device is decreased, before the torque capacity of the torque capacity control device is decreased.
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