GB1086662A - Improvements relating to self-propelled traction vehicles, more particularly agricultural tractors - Google Patents
Improvements relating to self-propelled traction vehicles, more particularly agricultural tractorsInfo
- Publication number
- GB1086662A GB1086662A GB4891564A GB4891564A GB1086662A GB 1086662 A GB1086662 A GB 1086662A GB 4891564 A GB4891564 A GB 4891564A GB 4891564 A GB4891564 A GB 4891564A GB 1086662 A GB1086662 A GB 1086662A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- output
- gear
- fluid
- wheel
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B67/00—Devices for controlling the tractor motor by resistance of tools
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Control Of Transmission Device (AREA)
Abstract
1,086,662. Tractor power lift mechanism. LINDE A.G. Dec. 3, 1964 [Dec. 3, 1963; March 4, 1964], No. 48915/64. Heading A1P. [Also in Division B7] A tractor is provided with means whereby the engine output, the ratio of a continuously variable transmission gear or an operational characteristic of a mounted or trailed implement is controlled in response to the magnitude of the tractive load or to the occurrence of wheel spin. In Fig. 1 the resistance of a plough carried by a three-point linkage depresses the upper link 4 against spring loading 14 to actuate a lever 10 linked to a lever 16 which regulates the engine output or adjusts the ratio of a continuously variable transmission gear. If the lever 16 controls the transmission gear ratio, it may also, as at predetermined position during its travel, alter the engine speed from that associated with lowest specific fuel consumption to the maximum speed or to that providing greatest torque. In a tractor provided with a continuously variable hydrostatic transmission (Fig. 2, not shown) comprising a variable output pump (22) driven by the engine and connected by pipes (24, 25) to a hydrostatic motor, one of valves (28, 29) is opened when the adjustable portion (23) of the pump is positioned to provide maximum output, whereupon fluid from one of pipes (24, 25) is supplied to a cylinder (34) containing a piston (35) displaceable against spring loading to regulate the engine output. An exhaust pipe (38) restricted by a capillary bore enables fluid to be exhausted from the cylinder (34) when both valves (28, 29) are closed so that the piston (35) is restored to its initial position by the spring (36). In Fig. 3 the output of a hydrostatic transmission pump 22 is reduced should a traction wheel spin by a hydraulic ram 47 communicating through a valve 43 with a flow circuit 52 between a gear pump 53 coupled to a driven wheel and a gear pump 54 coupled to an undriven reference wheel. When the driven wheel slips the output of fluid from the gear pump 53 exceeds that returned by the gear pump 54 to a reservoir 56 and the excess fluid is supplied to the cylinder 47 to reduce the output of the transmission pump 22. Should the wheel continue to slip when the output from the pump 22 reaches a minimum, a projection 39 on the adjustable portion 23 of the pump depresses a spring-loaded contact plate 40 to displace the valve 43 and divert excess fluid from the gear pump 53 to a power device 50 which reduces the depth of furrow of a plough or adjusts the cutting angle of the ploughshare and/or mould board about a vertical or inclined axis.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG0039297 | 1963-12-03 | ||
DEG0040002 | 1964-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1086662A true GB1086662A (en) | 1967-10-11 |
Family
ID=25978574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4891564A Expired GB1086662A (en) | 1963-12-03 | 1964-12-03 | Improvements relating to self-propelled traction vehicles, more particularly agricultural tractors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1086662A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2907368A1 (en) * | 2014-02-18 | 2015-08-19 | Amazonen-Werke H. Dreyer GmbH & Co. KG | Automatic traction reinforcement |
US9845008B2 (en) | 2015-09-03 | 2017-12-19 | Deere & Company | System and method of detecting load forces on a traction vehicle to predict wheel slip |
US9994104B2 (en) | 2015-09-03 | 2018-06-12 | Deere & Company | System and method of reacting to wheel slip in a traction vehicle |
US10112615B2 (en) | 2015-09-03 | 2018-10-30 | Deere & Company | System and method of reacting to wheel slip in a traction vehicle |
US10407072B2 (en) | 2015-09-03 | 2019-09-10 | Deere & Company | System and method of regulating wheel slip in a traction vehicle |
-
1964
- 1964-12-03 GB GB4891564A patent/GB1086662A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2907368A1 (en) * | 2014-02-18 | 2015-08-19 | Amazonen-Werke H. Dreyer GmbH & Co. KG | Automatic traction reinforcement |
US9845008B2 (en) | 2015-09-03 | 2017-12-19 | Deere & Company | System and method of detecting load forces on a traction vehicle to predict wheel slip |
US9994104B2 (en) | 2015-09-03 | 2018-06-12 | Deere & Company | System and method of reacting to wheel slip in a traction vehicle |
US10112615B2 (en) | 2015-09-03 | 2018-10-30 | Deere & Company | System and method of reacting to wheel slip in a traction vehicle |
US10407072B2 (en) | 2015-09-03 | 2019-09-10 | Deere & Company | System and method of regulating wheel slip in a traction vehicle |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3003309A (en) | Single lever control apparatus for engine and hydraulic transmission | |
GB1155374A (en) | Tractors | |
CA1056262A (en) | Draft load control for tractors | |
US2715863A (en) | Power operating system for tractor hitch linkages | |
US3275084A (en) | Tractor hydraulic control system | |
GB1086662A (en) | Improvements relating to self-propelled traction vehicles, more particularly agricultural tractors | |
US2627796A (en) | Controllable load transfer hitch for tractors | |
US2777375A (en) | Traction boosting power lift system | |
GB909169A (en) | Hydraulic transmission system | |
US2973043A (en) | Control mechanism for tractor hydraulic systems | |
US2914125A (en) | Power lift system | |
US3182729A (en) | Hydraulic implement control for tractors | |
US3235010A (en) | Load depth control valve | |
US3275085A (en) | Power operating and control system for tractors | |
US3183977A (en) | Tractor power lift system | |
US3636705A (en) | Automatic control system for hydrostatic drive | |
US3263767A (en) | Vehicle wheel speed control mechanism | |
US2545573A (en) | Controllable stop for regulating strokes of fluid pressure apparatus | |
GB1297793A (en) | ||
US3714999A (en) | Hydrostatic drive for vehicle | |
US3042119A (en) | Hydraulic power lift and control device | |
US4125166A (en) | Control system and method for loading of engine driven apparatus | |
US3439709A (en) | Hydraulic draft control valve | |
US3095933A (en) | Hydraulic control system | |
FR2399562A1 (en) | HYDRAULIC TOOLS CONTROL DEVICE, ESPECIALLY ON AN AGRICULTURAL VEHICLE |