Park brake control assembly
US-9845083-B2 · Dec 19, 2017 · US
Control device for work vehicle
US9409553B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9409553-B2 |
| Application number | US-201314373504-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 18, 2013 |
| Priority date | Jan 19, 2012 |
| Publication date | Aug 9, 2016 |
| Grant date | Aug 9, 2016 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
A control device for work vehicle includes: a hydraulic brake device that generates a braking force according to operation of a brake pedal upon traveling; a brake lock device that hydraulically locks the hydraulic brake device and unlocks hydraulic lock of the hydraulic brake device; a brake pedal operation detection unit that detects the operation of the brake pedal; a hydraulic lock directing switch that is provided on a manual operating lever for operating a work device of the work vehicle; and a control unit that controls the brake lock device such that when the hydraulic lock directing switch is operated, the hydraulic brake device is hydraulically locked and when a predetermined depression operation of the brake pedal is detected by the brake pedal operation detection unit, the hydraulic lock of the hydraulic brake device is unlocked.
First claim
Opening claim text (preview).
The invention claimed is: 1. A control device for a work vehicle, comprising: a hydraulic brake device that generates a braking force according to an operation of a brake pedal upon traveling; a brake lock device that hydraulically locks the hydraulic brake device and unlocks a hydraulic lock of the hydraulic brake device; a brake pedal operation detection unit that detects the operation of the brake pedal; a hydraulic lock directing switch that is provided on a manual operating lever for operating a work device of the work vehicle; and a control unit that controls the brake lock device such that when the hydraulic lock directing switch is operated, the hydraulic brake device is hydraulically locked and when a predetermined depression operation of the brake pedal is detected by the brake pedal operation detection unit, the hydraulic lock of the hydraulic brake device is unlocked, wherein the control unit controls the brake lock unit such that even when the hydraulic lock directing switch is operated after the hydraulic brake device is hydraulically locked, the hydraulic lock of the hydraulic brake device is not unlocked. 2. A control device for a work vehicle, comprising: a hydraulic brake device that generates a braking force according to an operation of a brake pedal upon traveling; a brake lock device that hydraulically locks the hydraulic brake device and unlocks a hydraulic lock of the hydraulic brake device; a brake pedal operation detection unit that detects the operation of the brake pedal; a hydraulic lock directing switch that is provided on a manual operating lever for operating a work device of the work vehicle; a control unit that controls the brake lock device such that when the hydraulic lock directing switch is operated, the hydraulic brake device is hydraulically locked and when a predetermined depression operation of the brake pedal is detected by the brake pedal operation detection unit, the hydraulic lock of the hydraulic brake device is unlocked; and an accelerator pedal operation detection unit that detects operation of an accelerator pedal, wherein the control unit invalidates operation of the hydraulic lock directing switch when the accelerator pedal operation detection unit detects that the accelerator pedal is operated. 3. The control device according to claim 2 , further comprising: a speed detection unit that detects a traveling speed of the work vehicle, wherein when the hydraulic lock directing switch is operated, the control unit controls the brake lock unit such that a braking force generated by the hydraulic brake device becomes greater as the traveling speed detected by the speed detection unit becomes lower.
Assignees
Inventors
Classifications
Hydraulic systems · CPC title
Using electrical or electronic regulation means to control braking {(detecting or indicating faulty operation B60T8/885)} · CPC title
Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission · CPC title
Systems with two or more pumps · CPC title
- B60T7/045Primary
with locking and release means, e.g. providing parking brake application · CPC title
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Frequently asked questions
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- What does patent US9409553B2 cover?
- A control device for work vehicle includes: a hydraulic brake device that generates a braking force according to operation of a brake pedal upon traveling; a brake lock device that hydraulically locks the hydraulic brake device and unlocks hydraulic lock of the hydraulic brake device; a brake pedal operation detection unit that detects the operation of the brake pedal; a hydraulic lock directin…
- Who is the assignee on this patent?
- Hitachi Construction Mach Co
- What technology area does this patent fall under?
- Primary CPC classification B60T7/045. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 09 2016 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).