Shift control apparatus of vehicle automatic transmission
US-2017050640-A1 · Feb 23, 2017 · US
Control device of vehicle
US10288131B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10288131-B2 |
| Application number | US-201715644154-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 7, 2017 |
| Priority date | Jul 29, 2016 |
| Publication date | May 14, 2019 |
| Grant date | May 14, 2019 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
A vehicle control device including a multi-speed transmission switching gear shift positions in accordance with a combination of hydraulic friction engagement devices operations and pressure control solenoid valves, the control device shifting gears by providing a shift output signal including a quick-apply signal to the valves after a first time from a shift request, the control device has: a pulsation drive control portion to control selectively pulsating the pressure control solenoid valves in a cycle; and a quick-apply control prohibiting portion to prohibit a provision of a quick-apply control using the quick-apply signal for a second time from a time of termination of the pulsation drive control, and to permit the provision of the quick-apply control after the elapse of the second time, for a valve having undergone the control, the pulsation drive control portion to terminate the control for a valve when the shift request is made.
First claim
Opening claim text (preview).
What is claimed is: 1. A control device of a vehicle including a multi-speed transmission switching gear shift positions in accordance with combination of operations of a plurality of hydraulic friction engagement devices and a plurality of pressure control solenoid valves respectively controlling pressures of hydraulic fluid to the plurality of hydraulic friction engagement devices, the control device of a vehicle shifting gears by providing a shift output signal including a quick-apply signal to the plurality of pressure control solenoid valves after a first predetermined time from a shift request based on an operational state, the control device comprising: a pulsation drive control portion configured to provide a pulsation drive control of selectively pulsating the plurality of pressure control solenoid valves in a predetermined cycle; and a quick-apply control prohibiting portion configured to prohibit a provision of a quick-apply control using the quick-apply signal for a second predetermined time longer than the first predetermined time from a time of termination of the pulsation drive control, and to permit the provision of the quick-apply control after the elapse of the second predetermined time, for a pressure control solenoid valve having undergone the pulsation drive control out of the plurality of pressure control solenoid valves, the pulsation drive control portion being further configured to terminate the pulsation drive control for a pressure control solenoid valve undergoing the pulsation drive control out of the plurality of pressure control solenoid valves when the shift request is made. 2. The control device of a vehicle according to claim 1 , wherein the second predetermined time is set shorter as a temperature of the hydraulic fluid becomes higher. 3. The control device of a vehicle according to claim 1 , wherein the shift of the multi-speed transmission is performed by releasing a release-side hydraulic friction engagement device and engaging an engagement-side hydraulic friction engagement device out of the plurality of hydraulic friction engagement devices, and wherein the pressure control solenoid valve having undergone the pulsation drive control controls a pressure of the hydraulic fluid to the engagement-side hydraulic friction engagement device.
Assignees
Inventors
Classifications
with orbital gears · CPC title
with diagnostic check cycles; Monitoring of failures · CPC title
Hydraulic parts of the controller, e.g. a sticking valve or clogged channel · CPC title
Layout of hydraulic control circuits, e.g. arrangement of valves · CPC title
Cleaning of hydraulic parts, e.g. removal of an orifice clogging · CPC title
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Frequently asked questions
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- What does patent US10288131B2 cover?
- A vehicle control device including a multi-speed transmission switching gear shift positions in accordance with a combination of hydraulic friction engagement devices operations and pressure control solenoid valves, the control device shifting gears by providing a shift output signal including a quick-apply signal to the valves after a first time from a shift request, the control device has: a …
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16D25/14. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 14 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).