IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0933707
(2007-11-01)
|
등록번호 |
US-8200382
(2012-06-12)
|
우선권정보 |
DE-10 2006 051 832 (2006-11-03) |
발명자
/ 주소 |
|
출원인 / 주소 |
- VOLKSWAGEN Aktiengesellschaft
|
대리인 / 주소 |
Norris, McLaughlin & Marcus, P.A.
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
7 |
초록
▼
The invention is directed to a method and a system for controlling a drive torque of a hybrid drive unit (10) of an automobile after a start. The hybrid drive unit (10) includes a first drive source (12), in particular an internal combustion engine, includes at least one electric machine (14), which
The invention is directed to a method and a system for controlling a drive torque of a hybrid drive unit (10) of an automobile after a start. The hybrid drive unit (10) includes a first drive source (12), in particular an internal combustion engine, includes at least one electric machine (14), which can be operated either in motor-mode or in generator-mode, wherein the electric machine (14) provides in motor operation an electromotive torque (M_EM), which in conjunction with a torque (M_VM) of the first drive source (12) represents a total drive torque of the drive unit (10), and supplies in generator-mode electric power.
대표청구항
▼
1. A method for controlling a drive torque of a hybrid drive unit of an automobile after a start, the hybrid drive unit comprising a first drive source and at least one electric machine, wherein the first drive source is an internal combustion engine, wherein the at least one electric machine is con
1. A method for controlling a drive torque of a hybrid drive unit of an automobile after a start, the hybrid drive unit comprising a first drive source and at least one electric machine, wherein the first drive source is an internal combustion engine, wherein the at least one electric machine is configured to be selectively operated in a motor-mode or in a generator-mode, wherein the at least one electric machine provides an electromotive torque in the motor-mode, which in conjunction with a torque of the first drive source represents a total drive torque of the hybrid drive unit, and supplies electric power in the generator-mode, the method comprising the steps of: determining an actual requested desired torque as a function of at least an actual pedal value;determining a predetermined nominal torque of the first drive source as a function of an actual rotation speed of the first drive source and independently of the actual requested desired torque;operating, if predetermined criteria are met, the first drive source according to the predetermined nominal torque;determining a torque difference between the predetermined nominal torque and the actual requested desired torque; andoperating, when the torque difference is negative, the at least one electric machine in the motor-mode so as to provide an electromotive torque corresponding substantially to the torque difference. 2. The method according to claim 1, wherein, for a positive torque difference, the at least one electric machine is operated in the generator-mode for supplying electric energy essentially corresponding to the positive torque difference. 3. The method according to claim 2, wherein the electric energy is used for charging an energy store and/or for supplying energy directly to an onboard vehicle electric system. 4. The method according to claim 1, wherein the predetermined nominal torque is predefined as a function of an actual rotation speed of the first drive source according to a standardized driving cycle. 5. The method according to claim 1, wherein the method is suspended when the absolute value of the determined torque difference exceeds a maximum pre-determined difference. 6. The method according to claim 1, wherein a tolerance range for the predetermined nominal torque is defined and the torque difference between the tolerance range of the predetermined nominal torque and the actual requested desired torque is determined. 7. The method according to claim 1, wherein the predetermined criteria comprise criteria for determining an inactivity of an exhaust gas emission control system. 8. The method according to claim 7, wherein the predetermined criteria for determining the inactivity of an exhaust gas emission control system comprise at least one of the following criteria: a catalytic converter temperature falls below a predetermined limit temperature;an integrated heat supplied to the exhaust gas system falls below a predetermined limit value;a catalytic converter light-off not yet recognized;a predetermined time interval after ignition of the first drive source has not yet elapsed;a predetermined time interval after start of the first drive source has not yet elapsed; andan operational readiness of exhaust gas sensors of the emission control system has not yet been reached. 9. The method according to claim 1, wherein the predetermined criteria comprise criteria for determining the feasibility of the torque control method. 10. The method according to claim 9, wherein the predetermined criteria for determining the feasibility of the torque control method comprise at least one of the following criteria: a rotation speed requested for the vehicle drive is within a predetermined range;a desired torque requested for the vehicle drive is within a predetermined range;a charge state of an energy store exceeds a predetermined value; andan adapted actual vehicle height above NN is less than a predetermined value. 11. A torque control unit for a hybrid drive unit of an automobile after a start, the hybrid drive unit comprising a first drive source and at least one electric machine, wherein the at least one electric machine is configured to be operated in a motor-mode or in a generator-mode, wherein the at least one electric machine provides, in the motor-mode, an electromotive torque, which in conjunction with a torque of the first drive source represents a total drive torque of the drive unit, and supplies, in the generator-mode, electric power, wherein the torque control unit comprises a program algorithm and engine controller for carrying out the method according to claim 1. 12. The method according to claim 4, wherein the standardized driving cycle is a standardized exhaust gas driving cycle. 13. The method according to claim 8, wherein the exhaust gas sensors are lambda sensors. 14. The method according to claim 1, wherein the actual pedal value is indicative of a position of a gas pedal. 15. The method according to claim 1, wherein the actual pedal value is settable by a driver of the automobile.
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