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公开(公告)号：US10106142B2
公开(公告)日：2018-10-23
申请号：US15041667
申请日：2016-02-11
摘要： A powertrain system including an engine and transmission is described, and includes a temperature sensor disposed to monitor a hydraulic fluid for the transmission. A method for monitoring the temperature sensor includes monitoring engine operation including engine coolant temperature and monitoring a signal output from the temperature sensor. An indicated temperature slope is determined based upon the signal output from the temperature sensor, and a temperature region associated with the engine coolant temperature is determined. Performance of the temperature sensor is evaluated based upon the indicated temperature slope and minimum and maximum temperature slope thresholds that are associated with the temperature region.
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公开(公告)号：US11293546B1
公开(公告)日：2022-04-05
申请号：US17085156
申请日：2020-10-30
IPC分类号： B60W50/06 , F16H61/662 , B60W10/06 , B60W10/101 , B60K17/16 , B60W30/19 , B60K17/06 , B60K17/02 , B60K23/00 , F16H61/66
摘要： A system of selecting a transmission manual mode entry gear during transient driving conditions of an automobile vehicle includes a transmission in an automobile vehicle. An engine is connected to the transmission. A torque converter is connected to the transmission, and a differential provides drive output. A controller is in communication with the engine and the transmission. A shift device is in communication with the controller allowing manual selection by an operator of the automobile vehicle between a Park, a Reverse, a Neutral, a Drive and a Low or Manual (PRNDL) operating modes. A predicted gear is frozen close to a real gear at a time of entrance into the Manual mode.
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3.发明授权公开(公告)号：US10774930B1
公开(公告)日：2020-09-15
申请号：US16418593
申请日：2019-05-21
发明人： Xuefeng T. Tao , Steven P. Moorman , Ronald W. Van Diepen , Jeffrey M. DeSimone , Madhura N. Paranjape
IPC分类号： F16H61/66 , F16H61/662 , F16H59/48 , F16H59/54 , F16H59/36 , F16H59/68 , F16H59/72 , F16H59/70
摘要： A method and system for selecting a speed ratio for a continuously variable transmission (CVT) of a vehicle during braking. The method and system includes determining a Current Actual Speed Ratio of the CVT when the distance of a brake pedal travel exceeds a predetermined distance, determining, by a transmission control module (TCM), an amount of Available Speed Ratio Change (Δr), a Current Ratio Change Capability (Current-{dot over (r)}), and a Predictive Ratio Change Capability (Predictive-{dot over (r)}). The method further includes the TCM calculating a Time to Reach the Minimum Under-drive Ratio (tUD), calculating a Predicted Velocity of the Vehicle (vPr) using (tUD), determining a Desired Speed Ratio of the CVT using the Predicted Velocity of the Vehicle (vPr), and actuating the CVT to the Desired Speed Ratio.
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公开(公告)号：US20180328481A1
公开(公告)日：2018-11-15
申请号：US15594164
申请日：2017-05-12
IPC分类号： F16H61/12 , F16H61/662
CPC分类号： F16H61/12 , F16H61/662 , F16H2061/1212 , F16H2061/1272
摘要： A variator control diagnostic system for an automobile vehicle includes a ratio error calculated by subtracting a transmission actual ratio from a commanded ratio. A first lookup table includes: an adjusted ratio error defined by adjusting the ratio error using a transmission fluid temperature value; and a rate curve compared against the adjusted ratio error to identify a lookup table output. A second lookup table provides a gross slip multiplier value based on a ratio bin torque offset value for a transmission ratio range. An adjusted error count is created by multiplying the gross slip multiplier value by the lookup table output.
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公开(公告)号：US20170232949A1
公开(公告)日：2017-08-17
申请号：US15041667
申请日：2016-02-11
CPC分类号： B60W10/10 , B60W10/06 , B60W50/0205 , B60W2050/0215 , B60W2510/0676 , B60W2510/107 , B60W2710/06 , B60W2710/10 , F16H57/0413 , F16H59/72 , F16H61/688 , F16H2061/0034 , F16H2061/0209
摘要： A powertrain system including an engine and transmission is described, and includes a temperature sensor disposed to monitor a hydraulic fluid for the transmission. A method for monitoring the temperature sensor includes monitoring engine operation including engine coolant temperature and monitoring a signal output from the temperature sensor. An indicated temperature slope is determined based upon the signal output from the temperature sensor, and a temperature region associated with the engine coolant temperature is determined. Performance of the temperature sensor is evaluated based upon the indicated temperature slope and minimum and maximum temperature slope thresholds that are associated with the temperature region.
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