CA2314717A1 - Combination motor/pneumatic driven train brake pipe pressure exhaust valve - Google Patents
Combination motor/pneumatic driven train brake pipe pressure exhaust valve Download PDFInfo
- Publication number
- CA2314717A1 CA2314717A1 CA002314717A CA2314717A CA2314717A1 CA 2314717 A1 CA2314717 A1 CA 2314717A1 CA 002314717 A CA002314717 A CA 002314717A CA 2314717 A CA2314717 A CA 2314717A CA 2314717 A1 CA2314717 A1 CA 2314717A1
- Authority
- CA
- Canada
- Prior art keywords
- valve
- brake pipe
- brake
- microprocessor
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003137 locomotive effect Effects 0.000 abstract 2
Landscapes
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
A microprocessor controlled valve system is used with an EOT unit on a railcar remote from the locomotive of the train.
The system includes a pressure transducer, a microprocessor, a valve device, a motor drive and a pneumatic drive. The microprocessor receives from the transducer an electrical signal indicative of actual brake pipe pressure and from the locomotive a brake command signal indicative of desired brake pipe pressure. The microprocessor issues a drive signal when the brake command signal requires a service brake application and an actuating signal when the brake command signal requires an emergency brake application. The valve devices defines an elongated bore, a primary passage, a branch passage, an exhaust passage and an elongated valve body able to move reciprocatingly in the bore according to the operation of the drives. The primary and branch passages communicate with the brake pipe, and all of the passages communicate with the bore.
The valve body feature (A) a first valve that when opened allows at least partial communication between the primary and exhaust passages and (B) a second valve that when opened allows communication between the branch and exhaust passages.
The motor drive opens the first valve in response to and to the extent dictated by the drive signal. In response to the actuating signal, the pneumatic drive fully opens the second valve thereby fully opening the first valve so that pressure in the brake pipe flows through the valves and vents via the exhaust passage.
The system includes a pressure transducer, a microprocessor, a valve device, a motor drive and a pneumatic drive. The microprocessor receives from the transducer an electrical signal indicative of actual brake pipe pressure and from the locomotive a brake command signal indicative of desired brake pipe pressure. The microprocessor issues a drive signal when the brake command signal requires a service brake application and an actuating signal when the brake command signal requires an emergency brake application. The valve devices defines an elongated bore, a primary passage, a branch passage, an exhaust passage and an elongated valve body able to move reciprocatingly in the bore according to the operation of the drives. The primary and branch passages communicate with the brake pipe, and all of the passages communicate with the bore.
The valve body feature (A) a first valve that when opened allows at least partial communication between the primary and exhaust passages and (B) a second valve that when opened allows communication between the branch and exhaust passages.
The motor drive opens the first valve in response to and to the extent dictated by the drive signal. In response to the actuating signal, the pneumatic drive fully opens the second valve thereby fully opening the first valve so that pressure in the brake pipe flows through the valves and vents via the exhaust passage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US831,485 | 1997-03-31 | ||
| US08/831,485 US5881768A (en) | 1997-03-31 | 1997-03-31 | Combination motor/pneumatic driven train brake pipe pressure exhaust valve |
| CA 2213013 CA2213013C (en) | 1997-03-31 | 1997-08-13 | Combination motor/pneumatic driven train brake pipe pressure exhaust valve |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2213013 Division CA2213013C (en) | 1997-03-31 | 1997-08-13 | Combination motor/pneumatic driven train brake pipe pressure exhaust valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2314717A1 true CA2314717A1 (en) | 1998-09-30 |
| CA2314717C CA2314717C (en) | 2001-12-04 |
Family
ID=25679547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002314717A Expired - Lifetime CA2314717C (en) | 1997-03-31 | 1997-08-13 | Combination motor/pneumatic driven train brake pipe pressure exhaust valve |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2314717C (en) |
-
1997
- 1997-08-13 CA CA002314717A patent/CA2314717C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2314717C (en) | 2001-12-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20170814 |