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公开(公告)号：US10513263B2
公开(公告)日：2019-12-24
申请号：US15810716
申请日：2017-11-13
Applicant: Caterpillar Inc.
Inventor： Christopher Lewis Wynkoop , Matthew Michael Tinker , Abhishek Awana
Abstract: A method for controlling an engagement of a lock-up clutch (LUC) of a torque converter of a machine is disclosed. The method includes detecting a pedal tap of a pedal, wherein the pedal tap is detected when the pedal is depressed from a position corresponding to a pedal displacement less than a first threshold displacement to a position corresponding to a pedal displacement greater than a second threshold displacement, and then released to a position corresponding to a pedal displacement less than the first threshold displacement within a threshold time duration. The method further includes causing the LUC to move to the LUC unlocked position if the pedal tap is detected.
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公开(公告)号：US20190143979A1
公开(公告)日：2019-05-16
申请号：US15810716
申请日：2017-11-13
Applicant: Caterpillar Inc.
Inventor： Christopher Lewis Wynkoop , Matthew Michael Tinker , Abhishek Awana
Abstract: A method for controlling an engagement of a lock-up clutch (LUC) of a torque converter of a machine is disclosed. The method includes detecting a pedal tap of a pedal, wherein the pedal tap is detected when the pedal is depressed from a position corresponding to a pedal displacement less than a first threshold displacement to a position corresponding to a pedal displacement greater than a second threshold displacement, and then released to a position corresponding to a pedal displacement less than the first threshold displacement within a threshold time duration. The method further includes causing the LUC to move to the LUC unlocked position if the pedal tap is detected.
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公开(公告)号：US10024423B1
公开(公告)日：2018-07-17
申请号：US15486064
申请日：2017-04-12
Applicant: Caterpillar Inc.
Abstract: A braking reduction and transmission control system is implemented in a vehicle or machine having a power source and an automatic transmission connected by a torque converter providing a fluid coupling between a power source output shaft and a transmission input shaft. A lock-up clutch operatively connect to the torque converter is locked when the shafts are rotating at approximately the same speed. The braking reduction and transmission control system unlocks the lock-up clutch when operating conditions of the machine indicate that a transmission downshift will occur, such as when a combination of a brake input device displacement and a machine ground speed compared to a transmission downshift schedule indicate that the downshift will occur. Prior to downshifting the transmission and unlocking the torque converter, the drivetrain assists the service brakes in slowing the machine.
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