US5514050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for operating a motor vehicle having a continuously variable transmission by continuously changing the transmission ratio or detecting if a braking operation is present and continuously adjusting the transmission
Assignee: Robert Bosch GmbH
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Filing: 1994-03-31
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Granted: 1996-05-07
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Expires: 2014-03-31
Abstract
Abstract A method for operating a motor vehicle such as a passenger car, which is equipped with a motor and an electronically controlled, continuously variable transmission includes the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that the vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; and/or, detecting possible slip at the wheels of the motor vehicle and adjusting a corresponding other, lower gear ratio continuously on the transmission so that the slip is reduced or is entirely eliminated thereby defining a slip-adjustment mode of operation; and/or, detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; and/or, continuously changing the gear ratio of the transmission by means of a manually operated actuating device with the change being carried out within the limits of the highest and lowest gear ratio as long as the manual actuation takes place thereby defining a manual mode of operation.
Inventors
- 👤 Peter Bauerle
- 👤 Gerhard Keuper
- 👤 Joachim Luh
- 👤 Karl-Heinz Senger
- 👤 Peter Weiberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:37
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/101; B60W30/00; B60W30/18; B60W30/18009; B60W30/18063; B60W30/18109; B60W30/18136; B60W30/18172; B60W30/1819; F; F16; F16H; F16H61/00; F16H61/21; F16H61/66; F16H61/662; F16H61/66254; F16H61/66259; B60K; B60K28/00; B60K28/10; B60K28/16; B60K28/165; B60W50/00; B60W2050/0001; B60W2050/0019; B60W2050/0028; B60W2050/0031; B60W2552/00; B60W2552/15; B60W2720/00; B60W2720/10; F16H59/00; F16H59/14; F16H2059/142; F16H59/50; F16H2059/506; F16H59/60; F16H59/66; F16H2059/663; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0213; F16H2061/0234; F16H2061/0239; F16H2061/6604; F16H2061/6611; F16H2061/6612; F16H2061/6617; F16H59/24; F16H59/36; F16H59/44; F16H59/48; F16H59/54; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
133 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel during which the motor vehicle has a longitudinal acceleration; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; and, during said downhill travel motor braking mode of operation, detecting the downhill travel by satisfying the conditions: minimal throttle flap angle and said longitudinal acceleration of the motor vehicle being positive.
Claim 2
Independent Claim
133 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel during which the motor vehicle has a longitudinal acceleration; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; and, during said downhill travel motor braking mode of operation, detecting the downhill travel by satisfying the conditions: minimal throttle flap angle and said longitudinal acceleration of the motor vehicle being positive.
Claim 3
Independent Claim
172 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation; detecting the instantaneous motor rpm (NE act ) or the transmission input rpm; comparing the instantaneous motor rpm (NE act ) or the transmission input rpm as a control variable to a corresponding guide variable (NE des ); and, in dependence upon this comparison result, changing the gear ratio (i) of the transmission in the sense of an approximation to the guide variable.
Claim 4
Independent Claim
172 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation; detecting the instantaneous motor rpm (NE act ) or the transmission input rpm; comparing the instantaneous motor rpm (NE act ) or the transmission input rpm as a control variable to a corresponding guide variable (NE des ); and, in dependence upon this comparison result, changing the gear ratio (i) of the transmission in the sense of an approximation to the guide variable.
Claim 5
Independent Claim
125 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; using a controller having a proportional component and a differential component for controlling said transmission; and, making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation.
Claim 6
Independent Claim
125 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; using a controller having a proportional component and a differential component for controlling said transmission; and, making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation.
Claim 7
Independent Claim
146 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; detecting the instantaneous vehicle speed V act ; low-pass filtering said instantaneous vehicle speed V act and applying the low-pass filtered instantaneous vehicle speed V actF as an actual variable to a controller for said transmission; and, making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation.
Claim 8
Independent Claim
146 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; detecting the instantaneous vehicle speed V act ; low-pass filtering said instantaneous vehicle speed V act and applying the low-pass filtered instantaneous vehicle speed V actF as an actual variable to a controller for said transmission; and, making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation.
Claim 9
Independent Claim
200 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; storing the detected motor vehicle speed as a desired speed V des at the start of downhill travel; detecting the instantaneous motor vehicle speed V act during said downhill travel; comparing said desired speed V des to the instantaneous motor vehicle speed V act during downhill travel; forming a new desired speed in the case where the deviation between the desired speed V des and the instantaneous vehicle speed V act exceeds a pregiven threshold T; low-pass filtering the instantaneous vehicle speed V act to obtain a low-pass filtered instantaneous V actF ; and, making the comparison by applying the low-pass filtered instantaneous vehicle speed V actF .
Claim 10
Independent Claim
200 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; storing the detected motor vehicle speed as a desired speed V des at the start of downhill travel; detecting the instantaneous motor vehicle speed V act during said downhill travel; comparing said desired speed V des to the instantaneous motor vehicle speed V act during downhill travel; forming a new desired speed in the case where the deviation between the desired speed V des and the instantaneous vehicle speed V act exceeds a pregiven threshold T; low-pass filtering the instantaneous vehicle speed V act to obtain a low-pass filtered instantaneous V actF ; and, making the comparison by applying the low-pass filtered instantaneous vehicle speed V actF .
Claim 11
Independent Claim
203 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation; storing the detected motor vehicle speed as a desired speed V des at the start of downhill travel; detecting the instantaneous motor vehicle speed V act during said downhill travel; comparing said desired speed V des to the instantaneous motor vehicle speed V act during downhill travel; forming a new desired speed in the case where the deviation between the desired speed V des and the instantaneous vehicle speed V act exceeds a pregiven threshold T; and, increasing the instantaneous vehicle speed V act by the threshold T to form the new desired speed.
Claim 12
Independent Claim
203 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation; storing the detected motor vehicle speed as a desired speed V des at the start of downhill travel; detecting the instantaneous motor vehicle speed V act during said downhill travel; comparing said desired speed V des to the instantaneous motor vehicle speed V act during downhill travel; forming a new desired speed in the case where the deviation between the desired speed V des and the instantaneous vehicle speed V act exceeds a pregiven threshold T; and, increasing the instantaneous vehicle speed V act by the threshold T to form the new desired speed.
Claim 13
Independent Claim
84 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor end an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; generating a constant motor brake torque by adjusting the transmission in said brake-supporting mode of operation.
Claim 14
Independent Claim
84 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor end an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; generating a constant motor brake torque by adjusting the transmission in said brake-supporting mode of operation.
Claim 15
Independent Claim
97 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: continuously changing the gear ratio of the transmission by means of a manually operated actuating device with the change being carried out within the limits of the highest and lowest gear ratio as long as the manual actuation takes place thereby defining a manual mode of operation; and, adjusting the gear ratio at a constant speed of change in the manual mode of operation.
Claim 16
Independent Claim
97 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: continuously changing the gear ratio of the transmission by means of a manually operated actuating device with the change being carried out within the limits of the highest and lowest gear ratio as long as the manual actuation takes place thereby defining a manual mode of operation; and, adjusting the gear ratio at a constant speed of change in the manual mode of operation.
Claim 17
Independent Claim
88 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; adjusting the motor braking torque in such a manner that its proportion of the entire braking torque is always constant.
Claim 18
Independent Claim
88 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; adjusting the motor braking torque in such a manner that its proportion of the entire braking torque is always constant.
Claim 19
Independent Claim
103 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; adjusting the motor braking torque in such a manner that its proportion of the entire braking torque is variably dimensioned in accordance with a fixed characteristic such as with the aid of a characteristic line.
Claim 20
Independent Claim
103 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the gear ratio to support the brakes of the motor vehicle to define a brake-supporting mode of operation; adjusting the motor braking torque in such a manner that its proportion of the entire braking torque is variably dimensioned in accordance with a fixed characteristic such as with the aid of a characteristic line.
Claim 21
Independent Claim
204 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; storing the detected vehicle speed as desired speed V des at the start of the downhill travel; detecting the instantaneous vehicle speed V act and, by means of a controlled change of the gear ratio, causing the instantaneous vehicle speed V act to approximate the desired speed V des ; with a desired overrun force F des being determined from the deviation between the desired speed V des and the instantaneous speed V act ; and, with a desired motor rpm NE des being determined in dependence upon this desired overrun force F des ; making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation.
Claim 22
Independent Claim
204 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting a driving state defined by downhill travel; detecting the speed of the vehicle at the start of the downhill travel and storing the vehicle speed; continuously changing the transmission in such a manner that said vehicle speed is substantially maintained while utilizing the braking action of the motor thereby defining a downhill travel motor braking mode of operation; storing the detected vehicle speed as desired speed V des at the start of the downhill travel; detecting the instantaneous vehicle speed V act and, by means of a controlled change of the gear ratio, causing the instantaneous vehicle speed V act to approximate the desired speed V des ; with a desired overrun force F des being determined from the deviation between the desired speed V des and the instantaneous speed V act ; and, with a desired motor rpm NE des being determined in dependence upon this desired overrun force F des ; making a controlled adjustment of the gear ratio in the downhill travel motor braking mode of operation.
Claim 23
Independent Claim
108 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the reduction gear ratio thereof to support the brakes of the motor vehicle to define a brake-supporting mode of operation; and, in said brake-supporting mode of operation, generating a correspondingly dimensioned motor braking torque by correspondingly adjusting said reduction gear ratio in dependence upon the magnitude of the longitudinal deceleration resulting from the braking action of the brakes.
Claim 24
Independent Claim
108 words
A method of operating a motor vehicle such as a passenger car, the motor vehicle being equipped with a motor and an electronically controlled, continuously variable transmission, the method comprising the steps of: detecting if a braking operation is present and, during braking operation, continuously adjusting the transmission by changing the reduction gear ratio thereof to support the brakes of the motor vehicle to define a brake-supporting mode of operation; and, in said brake-supporting mode of operation, generating a correspondingly dimensioned motor braking torque by correspondingly adjusting said reduction gear ratio in dependence upon the magnitude of the longitudinal deceleration resulting from the braking action of the brakes.
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