IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0959653
(2007-12-19)
|
등록번호 |
US-8311715
(2012-11-13)
|
우선권정보 |
DE-10 2007 001 496 (2007-01-10) |
발명자
/ 주소 |
- Gierer, Georg
- Popp, Christian
- Schmidt, Thilo
- Steinhauser, Klaus
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
7 |
초록
▼
A method for monitoring frictional engagement in an automatic or automated motor vehicle transmission having a hydrodynamic starter element when the transmission is in a preset neutral or parking position and the automatic or automated motor vehicle transmission controlled by this method. When the m
A method for monitoring frictional engagement in an automatic or automated motor vehicle transmission having a hydrodynamic starter element when the transmission is in a preset neutral or parking position and the automatic or automated motor vehicle transmission controlled by this method. When the motor vehicle is at or close to a standstill in a preset neutral or parking position, the current transmission rotational input speed and a current engine rotational speed of the drive motor are determined and based on the speed ratio between the current transmission rotational input speed and the current engine rotational speed an error is found to be present if the speed ratio is less than a predefined threshold value, which is less than/equal to 1.
대표청구항
▼
1. A method of using an electronic control device for detecting and responding to a transmission error in one of an automatic motor vehicle transmission and an automated motor vehicle transmission, the transmission having a starter element and being in one of a preset neutral position and a parking
1. A method of using an electronic control device for detecting and responding to a transmission error in one of an automatic motor vehicle transmission and an automated motor vehicle transmission, the transmission having a starter element and being in one of a preset neutral position and a parking position, the transmission being connected to a drive motor of the motor vehicle via the starter element, the starter element being either a torque converter or a hydrodynamic clutch, the method comprising the steps of: determining, via the electronic control device, a current transmission rotational input speed when the motor vehicle is at least substantially motionless and the transmission is in one of a preset neutral position and a parking position;determining, via the electronic control device, a current engine rotational speed of the drive motor when the motor vehicle is at least substantially motionless and the transmission is in one of the preset neutral position and the parking position;calculating, via the electronic control device, a speed ratio as the ratio of the current transmission rotational input speed to the current engine rotational speed;providing a preset ratio threshold value of one of equal to 1 and less than 1;comparing the speed ratio with the ratio threshold value; andif the speed ratio is less than the ratio threshold value, then determining, via the electronic control device, that an error is present in the transmission; andinitiating responsive measures in at least one of the transmission and the motor vehicle if the presence of an error in the transmission is determined. 2. The method according to claim 1, further comprising the step of defining the ratio threshold value as a value having a range between 0.7 and 1. 3. The method according to claim 1, further comprising the step of defining the ratio threshold value as a function of a current transmission temperature. 4. The method according to claim 1, further comprising the step of promptly initiating a response to the error when the error is present in the transmission. 5. The method according to claim 1, further comprising the steps of after concluding that the error is present in the transmission, determining a current transmission output torque based on the speed ratio, the starter element, and a gear ratio; andinitiating a response to the error only if the determined current transmission output torque one of exceeds and has exceeded a defined output torque threshold value. 6. The method according to claim 1, further comprising the step of initiating an error response following concluding that the error is present in the transmission only if a sensed transmission output torque one of exceeds and has exceeded a output torque defined threshold value. 7. The method according to claim 1, further comprising the step of performing, after concluding the presence of the error in the transmission, as an error response at least one of: activating an alternative function of the transmission, wherein a previously partially pressurized transmission shifting element, which generated a detected inadvertent frictional engagement, is completely disengaged;interrupting the frictional engagement in the transmission by disengaging at least one transmission shifting element involved in the frictional engagement;automatically actuating a parking mechanism of the transmission to lock an output shaft of the transmission and prevent rotation thereof;automatically actuating one of a braking system and a parking brake of the motor vehicle;triggering a visible warning indicator to alert a driver;triggering an acoustic warning signal to alert the driver;entering the error into a fault memory of the transmission; andone of stopping and shutting down the drive motor driving the transmission. 8. A method of using an electronic control device for detecting and responding to a transmission error in one of an automatic motor vehicle transmission and an automated motor vehicle transmission, the transmission having a starter element and being in one of a preset neutral position and a parking position, the transmission being connected to a drive motor of the motor vehicle via the starter element, the starter element being either a torque converter or a hydrodynamic clutch, the method comprising the steps of: determining, via the electronic control device, a current transmission rotational input speed when the motor vehicle is at least substantially motionless and the transmission is in one of a preset neutral position and a parking position;determining, via the electronic control device, a current engine rotational speed of the drive motor when the motor vehicle is at least substantially motionless and the transmission is in one of the preset neutral position and the parking position;calculating, via the electronic control device, a speed ratio as the ratio of the current transmission rotational input speed to the current engine rotational speed;providing a preset ratio threshold value of one of equal to 1 and less than 1;comparing the speed ratio with the ratio threshold value; andif the speed ratio is less than the ratio threshold value, then determining, via the electronic control device, that an error is present in the transmission;initiating responsive measures in at least one of the transmission and the motor vehicle if the presence of an error in the transmission is determined;following the detection of the error, determining a current transmission input torque based on both the speed ratio and the starter element, andinitiating a response to the error only if the determined current transmission input torque one of exceeds and has exceeded a preset input torque threshold value. 9. A motor vehicle transmission comprising: a starter element being arranged, in a power flow direction, between a drive motor and the motor vehicle transmission, the starter element being engagable to transmit rotation of the drive motor, which rotates at a drive motor rotational speed, into rotation of a transmission input, which rotates at a transmission rotational input speed, andan electronic control device that controls the motor vehicle transmission depending on a speed ratio, which is a ratio of the transmission rotational input speed and the engine rotational speed when the motor vehicle transmission is in one of a preset neutral position and a parking position and the motor vehicle is substantially motionless,wherein the electronic control device registers the transmission as being in an error state if the speed ratio is less than a preset threshold value which is one of less than and equal to 1, and the transmission being controllable in response to the detection of an error. 10. The motor vehicle transmission according to claim 9, wherein the motor vehicle transmission is an automatic multi-ratio transmission. 11. The motor vehicle transmission according to claim 9, wherein the motor vehicle transmission is an automatic transmission having mechanically continuously variable gear ratios and one of with power splitting and without power splitting. 12. The motor vehicle transmission according to claim 9, wherein the motor vehicle transmission is an automatic transmission having hydrostatically continuously variable gear ratios and one of with power splitting and without power splitting. 13. The motor vehicle transmission according to claim 9, wherein the motor vehicle transmission is an automated manual transmission. 14. The motor vehicle transmission according to claim 9, wherein the starter element is a torque converter. 15. The motor vehicle transmission according to claim 9, wherein the starter element is a hydrodynamic clutch.
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