US 2021/0293333 A1Published application

Control method for acceleration of cvt

AssigneesHyundai Motor Company, Kia Motors Corporation

InventorsSungjoon YOON, Ho Young KIM, Kyung Eup KIM, Youngmin KIM

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Abstract

A CVT acceleration control method applied to a CVT-mounted vehicle including an accelerator position sensor, a vehicle speed sensor, a driving pulley rotation sensor and a driven pulley rotation sensor that is configured to detect a rotation speed of a driven pulley and to output a corresponding signal, a CVT operation portion and a controller, the CVT acceleration control method, may include determining, by the controller, whether a current vehicle driving state satisfies a predetermined starting control condition, monitoring, by the controller, a current driving pulley rotation speed change, determining, by the controller, whether the current vehicle driving state satisfies a predetermined trigger condition, setting, by the controller, a target driving pulley rotation speed change, and controlling, by the controller, the operation of the CVT operation portion such that the current driving pulley rotation speed change converges to the target driving pulley rotation speed change.

Claims19

Dependent claims

A continuously variable transmission (CVT) acceleration control method applied to a CVT-mounted vehicle including an accelerator position sensor that is configured to detect an accelerator operation angle and to output a corresponding signal, a vehicle speed sensor that is configured to detect a vehicle speed of the CVT-mounted vehicle and to output a corresponding signal, a driving pulley rotation sensor that is configured to detect a rotation speed of a driving pulley and to output a corresponding signal, a driven pulley rotation sensor that is configured to detect a rotation speed of a driven pulley and to output a corresponding signal, a CVT operation portion that is configured to control a pulley ratio of the driving pulley and the driven pulley, and a controller that is connected to the CVT operation portion and configured to control an operation of the CVT operation portion according to the corresponding signals of the accelerator position sensor, the vehicle speed sensor, the driving pulley rotation sensor and the driven pulley rotation sensor, the CVT acceleration control method comprising:

determining, by the controller, whether a current vehicle driving state satisfies a predetermined starting control condition;
monitoring, by the controller, a current driving pulley rotation speed change, upon concluding that the current vehicle driving state satisfies the predetermined starting control condition;
determining, by the controller, whether the current vehicle driving state satisfies a predetermined trigger condition;
setting, by the controller, a target driving pulley rotation speed change upon concluding that the current vehicle driving state satisfies the predetermined trigger condition;
and
controlling, by the controller, the operation of the CVT operation portion so that the current driving pulley rotation speed change converges to the target driving pulley rotation speed change.

3 more elements

A vehicle comprising:

a continuously variable transmission (CVT) including a driving pulley and a driven pulley engaged to the driving pulley;
an accelerator position sensor that is configured to detect an accelerator operation angle and to output a corresponding signal, a vehicle speed sensor that is configured to detect a vehicle speed of the vehicle and to output a corresponding signal, a driving pulley rotation sensor that is configured to detect a rotation speed of the driving pulley and to output a corresponding signal, and a driven pulley rotation sensor that is configured to detect a rotation speed of the driven pulley and to output a corresponding signal,
a CVT operation portion that is configured to control a pulley ratio of the driving pulley and the driven pulley of the CVT;
and
a controller that is connected to the CVT operation portion and configured to control an operation of the CVT operation portion according to the corresponding signals of the accelerator position sensor, the vehicle speed sensor, the driving pulley rotation sensor and the driven pulley rotation sensor,
wherein the controller includes:
a processor;
and
a non-transitory storage medium containing program instructions,
wherein the processor is configured of, by executing the program instructions:
determining whether a current vehicle driving state satisfies a predetermined starting control condition;
monitoring a current driving pulley rotation speed change, upon concluding that the current vehicle driving state satisfies the predetermined starting control condition;
determining whether the current vehicle driving state satisfies a predetermined trigger condition;
setting a target driving pulley rotation speed change upon concluding that the current vehicle driving state satisfies the predetermined trigger condition;
and
controlling the operation of the CVT operation portion so that the current driving pulley rotation speed change converges to the target driving pulley rotation speed change.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/068,174Filed 12 Oct 2020
Priority: KR 10-2020-003440720 Mar 2020
Published: 23 Sep 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F16H 61/66227
With endless flexible members: controlling shifting exclusively as a function of speed and torque
F16H 61/66236
Controlling shifting exclusively as a function of speed: using electrical or electronic sensing or control means
F16H 9/14
Engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly…:…
F16H 61/66272
With endless flexible members: characterised by means for controlling the torque transmitting capability of the gearing