Control device of a powertrain with a centrifugal pendulum damper

Patent metadata

Field	Value
Publication number	US-9791043-B2
Application number	US-201615368267-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Dec 7, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A control device of a powertrain with a centrifugal pendulum damper is provided comprising a power transmission shaft which transmits power between a drive source and an automatic transmission, and a centrifugal pendulum damper which is coupled to the power transmission shaft and a connection/disconnection mechanism. The automatic transmission has a transmission mechanism of a hydraulic pressure control type, which includes a transmission control module which performs a control to supply transmission hydraulic pressure to the transmission mechanism. The transmission control module includes a transmission characteristic changing module which changes a control characteristic of transmission hydraulic pressure according to an engagement degree of the connection/disconnection mechanism.

First claim

The invention claimed is:

1. A control device for a powertrain, the powertrain comprising a power transmission shaft configured to transmit power between a drive source and an automatic transmission, and a centrifugal pendulum damper configured to be operatively coupled to the power transmission shaft and a connection/disconnection mechanism, the control device comprising:
a transmission control module, wherein
the automatic transmission is configured with a transmission mechanism of a hydraulic pressure control type;
the transmission control module is operatively coupled to the transmission mechanism and configured to perform a control to supply transmission hydraulic pressure to the transmission mechanism; and
the transmission control module includes a transmission characteristic changing module which changes a control characteristic of the transmission hydraulic pressure according to an engagement degree of the connection/disconnection mechanism.

2. The control device of claim 1 , wherein the transmission characteristic changing module increases the transmission hydraulic pressure with an increase in the engagement degree of the connection/disconnection mechanism.

3. The control device of claim 2 , wherein the transmission characteristic changing module changes the control characteristic of the transmission hydraulic pressure according to a moment of inertia of the power transmission shaft, the moment of inertia being based on the engagement degree of the connection/disconnection mechanism.

4. The control device of claim 3 , wherein when the engagement degree is changed during a gear shift control, the transmission characteristic changing module changes the control characteristic of the transmission hydraulic pressure according to the engagement degree after the gear shift control.

5. The control device of claim 4 , wherein the transmission characteristic changing module changes the transmission hydraulic pressure in a step-up process during the gear shift control according to the engagement degree of the connection/disconnection mechanism.

6. The control device of claim 5 , wherein the transmission characteristic changing module determines the engagement degree of the connection/disconnection mechanism based on one of a rotational differential of the connection/disconnection mechanism and a control hydraulic pressure of the connection/disconnection mechanism.

7. The control device of claim 2 , wherein when the engagement degree is changed during a gear shift control, the transmission characteristic changing module changes the control characteristic of the transmission hydraulic pressure according to the engagement degree after the gear shift control.

8. The control device of claim 2 , wherein the transmission characteristic changing module changes the transmission hydraulic pressure in a step-up process during the gear shift control according to the engagement degree of the connection/disconnection mechanism.

9. The control device of claim 2 , wherein the transmission characteristic changing module determines the engagement degree of the connection/disconnection mechanism based on one of a rotational differential of the connection/disconnection mechanism and a control hydraulic pressure of the connection/disconnection mechanism.

10. The control device of claim 3 , wherein the transmission characteristic changing module changes the transmission hydraulic pressure in a step-up process during the gear shift control according to the engagement degree of the connection/disconnection mechanism.

11. The control device of claim 1 , wherein the transmission characteristic changing module changes the control characteristic of the transmission hydraulic pressure according to a moment of inertia of the power transmission shaft, the moment of inertia being based on the engagement degree of the connection/disconnection mechanism.

12. The control device of claim 11 , wherein when the engagement degree is changed during a gear shift control, the transmission characteristic changing module changes the control characteristic of the transmission hydraulic pressure according to the engagement degree after the gear shift control.

13. The control device of claim 12 , wherein the transmission characteristic changing module changes the transmission hydraulic pressure in a step-up process during the gear shift control according to the engagement degree of the connection/disconnection mechanism.

14. The control device of claim 13 , wherein the transmission characteristic changing module determines the engagement degree of the connection/disconnection mechanism based on one of a rotational differential of the connection/disconnection mechanism and a control hydraulic pressure of the connection/disconnection mechanism.

15. The control device of claim 1 , wherein when the engagement degree is changed during a gear shift control, the transmission characteristic changing module changes the control characteristic of the transmission hydraulic pressure according to the engagement degree after the gear shift control.

16. The control device of claim 15 , wherein the transmission characteristic changing module changes the transmission hydraulic pressure in a step-up process during the gear shift control according to the engagement degree of the connection/disconnection mechanism.

17. The control device of claim 16 , wherein the transmission characteristic changing module determines the engagement degree of the connection/disconnection mechanism based on one of a rotational differential of the connection/disconnection mechanism and a control hydraulic pressure of the connection/disconnection mechanism.

18. The control device of claim 1 , wherein the transmission characteristic changing module changes the transmission hydraulic pressure in a step-up process during the gear shift control according to the engagement degree of the connection/disconnection mechanism.

19. The control device of claim 18 , wherein the transmission characteristic changing module determines the engagement degree of the connection/disconnection mechanism based on one of a rotational differential of the connection/disconnection mechanism and a control hydraulic pressure of the connection/disconnection mechanism.

20. The control device of claim 1 , wherein the transmission characteristic changing module determines the engagement degree of the connection/disconnection mechanism based on one of a rotational differential of the connection/disconnection mechanism and a control hydraulic pressure of the connection/disconnection mechanism.

Assignees

• Mazda Motor

Inventors

• Nakashima Kyosei
• Nakayama Yasunari
• Saito Tadashi
• Nakagishi Masaru
• Domen Narifumi
• Hongawara Narihito

Classifications

• F16H2059/465

  Detecting slip, e.g. clutch slip ratio · CPC title

• F16F15/1478

  with a planetary gear system · CPC title

• F16H61/2807 Primary

  using electric control signals for shift actuators, e.g. electro-hydraulic control therefor  (F16H61/30, F16H61/32 take precedence) · CPC title

• F16H59/46

  dependent on a comparison between speeds · CPC title

• F16H61/0021

  Generation or control of line pressure · CPC title