GB2272542A - An electronic control device for controlling the ro tation speed of an agricultural tractor engine - Google Patents

An electronic control device for controlling the ro tation speed of an agricultural tractor engine Download PDF

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Publication number
GB2272542A
GB2272542A GB9306842A GB9306842A GB2272542A GB 2272542 A GB2272542 A GB 2272542A GB 9306842 A GB9306842 A GB 9306842A GB 9306842 A GB9306842 A GB 9306842A GB 2272542 A GB2272542 A GB 2272542A
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GB
United Kingdom
Prior art keywords
engine
rotation speed
setting
electronic unit
power take
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
Application number
GB9306842A
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GB2272542B (en
GB9306842D0 (en
Inventor
Giovanni Esposito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Same SpA
Original Assignee
Same SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Same SpA filed Critical Same SpA
Publication of GB9306842D0 publication Critical patent/GB9306842D0/en
Publication of GB2272542A publication Critical patent/GB2272542A/en
Application granted granted Critical
Publication of GB2272542B publication Critical patent/GB2272542B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B60K31/02—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D28/00—Programme-control of engines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

A device 1 for controlling the engine speed of a tractor equipped with a power take off. The control device 1 comprises at least two control buttons 7, 8 for setting and recalling at least two different engine speeds, a memory button 9 to allow modification of the stored engine speeds and an automatic operation setting button 10 to set the engine to operate at a speed dependent on the operating conditions of the power take off as detected by transducers 5. <IMAGE>

Description

"An electronic control device for controlling the rotation speed of an agricultural tractor engine" The present invention is related to electronic control devices for controlling the engine rotation speed of an agricultural tractor, of the type comprising an electronic regulation system with associated programmable electronic unit, and a check panel provided with manual selection means electrically connected to the said electronic unit for selectively setting the rotation speed of the engine.
The object of the present invention is to provide a control device of the above mentioned type which is adapted to afford increased possibilities of automatism to the operator of the tractor in the adjustment of the engine rotation speed, even in connection with operation of the tractor with the relative power take-off (PTO) engaged.
A further object of the invention is to provide a control device of the aforesaid type which enables improving both ergonomics of the controls, and the working productivity of the agricultural tractor, due to a more convenient and rapid setting of the rotation speed of the tractor engine.
According to the invention, the above objects are achieved by virtue of a device of the above-mentioned type for the electronic control of the rotation speed of an agricultural tractor engine, having at least one power take-off adapted to be rotatably coupled to the engine and to be set in a plurality of operative conditions corresponding to predetermined rotation speeds of the engine, characterized in that it further comprises transducer means for detecting the said operative conditions of the power take-off and providing corresponding electrical signals to the electronic unit of the regulating system, and in that the check panel is provided with at least two control push buttons which can be operated for recalling and setting by means of the said electronic unit at least two corresponding different rotation speeds of the engine, with a storage push button for modifying the values of the rotation speeds of the engine which can be recalled by operating one or the other of the said at least two control push buttons, and with a setting push button for automatically setting the speed of rotation of the engine as a function of the condition of the power take-off detected by the said transducer means According to a preferred embodiment of the invention, the said control push buttons are four, so as to allow storage and immediate selective setting of respective values of the engine rotation speed.
The invention will now be disclosed in detail with reference to the annexed drawing, provided purely by way of non limiting example, which shows a block diagram of the electronic control device according to the invention.
Referring to the drawing, reference numeral 1 designates generically an electronic control device for controlling the rotation speed of an agricultural tractor engine.
The device 1 comprises, in a generally conventional way, an electronic regulator 2 known per se, normally operatively connected with the injection pump of the engine, with associated programmable electronic unit 3, which can be autonomous or integrated with the regulator 2.
Reference numeral 4 designates a display (optional) connected to the electronic unit 3 for indication of the set rotation speed of the engine, and reference 5 indicates transducers adapted to detect the operative conditions of the tractor power take-off and to provide corresponding electrical signals to the electronic unit 3.
Normally three different control members are associated with the power take-off (mechanical levers or push buttons switches): a first control member for engagement and disengagement of the power take-off, i.e. for coupling and uncoupling the corresponding shaft relative to the tractor engine; a second control member for selecting the rotation speed of the power take-off according to one or the other of two different standard speeds (540-1000 RPM); and a third control member for applying a reduction ratio to the said two standard speeds. Consequently, the number of the transducers 5 is variable as a function of the type of the control members used, and representation thereof in the figure is purely indicative.
Reference 6 designates a check panel provided with manual selection means electrically connected to the electronic unit 3 of the control device 1 for selectively setting the rotation speed of the tractor engine by means of the regulator 2.
According to the invention, the check panel 6 comprises a first and a second pair of control push buttons 7, 8, a storage push button 9 and an automatic setting push button 10.
Each of the control push buttons 7, 8 can be operated in order to modify and then to set permanently, using the strorage push button 9, any rotation speed of the engine selected as the operator likes, in the range of the RPM peculiar of the engine. In the figure, these speeds are indicated by "MAX", "MIN","SERV1", "SERV2" respectively.
Once having set the four different selected speeds, which are stored by the electronic unit 3, each of them can be automatically recalled by means of operation of the corresponding control push button 7, 8. The respective set rotation speed is indicated in turn by the display 4, if the latter is employed.
By operating instead the setting push button 10, in the engaged condition of the power take-off the control device leads the tractor engine to rotate at a speed such that the shaft of the said power take-off is driven at the standard speed selected by means of the respective control members. The selection of the speed is automatically accomplished, by means of the signals fed by the transducer 5, as a function of the condition set by the said control members (540 RPM, 1000 RPM, Economical), in the way previously clarified.
It will be apparent from the above that the control device according to the invention allows achievement of a wide range of automatisms for the immediate setting of preselected rotation speeds of the engine, thus appreciably improving the comfort and the convenience of operation of the tractor for the driver.
Naturally the details of construcion and the embodiments of the invention may be widely modified with respect to what has been disclosed and illustrated, without therefor departing from the scope of the invention such as defined in the appended claims.

Claims (3)

1. An electronic control device (1) for controlling the rotation speed of an agricultural tractor engine having at least one power take-off adapted to be coupled for rotation to the engine and to be set in a plurality of operative conditions corresponding to predetermined rotation speeds of the engine, the said device (1) including a regulating electronic system (2) of the engine rotation speed with associated programmable electronic unit (3), and a check panel (6) having manual selection means (7, 8) electrically connected to the said electronic unit (3) for selectively setting the rotation speed of the engine, characterized in that it further comprises transducer means (5) for detecting the said operative conditions of the power take-off and providing corresponding electrical signals to the electronic unit (3) of the regulating system (2), and in that the check panel (6) is provided with at least two control push buttons (7) which can be operated for recalling and setting by means of the said electronic unit (3) at least two different corresponding rotation speeds of the engine, with a storage push button (9) for modifying the values of the rotation speeds of the engine which can be recalled by operating one or the other of the said at least two control push buttons (7), and with a setting push button (10) for automatically setting the rotation speed of the engine as a function of the condition of the power takeoff detected by the said transducer means (5),
2. A device according to claim 1, characterized in that the said control push buttons are four (7, 8).
3. A device substantially as described with reference to the accompanying drawing.
GB9306842A 1992-11-03 1993-04-01 An electronic control device for controlling the rotation speed of an agricultural tractor engine Expired - Fee Related GB2272542B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000259 IT227670Y1 (en) 1992-11-03 1992-11-03 ELECTRONIC CONTROL DEVICE OF THE ROTATION SPEED OF THE ENGINE OF AN AGRICULTURAL TRACTOR.

Publications (3)

Publication Number Publication Date
GB9306842D0 GB9306842D0 (en) 1993-05-26
GB2272542A true GB2272542A (en) 1994-05-18
GB2272542B GB2272542B (en) 1995-11-22

Family

ID=11410291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9306842A Expired - Fee Related GB2272542B (en) 1992-11-03 1993-04-01 An electronic control device for controlling the rotation speed of an agricultural tractor engine

Country Status (4)

Country Link
DE (1) DE9306654U1 (en)
FR (1) FR2697586B3 (en)
GB (1) GB2272542B (en)
IT (1) IT227670Y1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2727467A1 (en) * 1994-11-28 1996-05-31 Belet Jean Yves Manually controlled engine electronic ignition system
WO2005028240A1 (en) * 2003-09-24 2005-03-31 Volvo Lastvagnar Ab Method for regulating the rotational speed of a clutch-independent power take-off

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766895B1 (en) * 1997-08-01 1999-08-27 Renault Agriculture METHOD AND DEVICE FOR CONTROLLING AN AGRICULTURAL TRACTOR ACCORDING TO SEVERAL DRIVING MODE

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045475A (en) * 1979-03-19 1980-10-29 Fidus Controls Ltd Vehicles equipped with power take-off apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045475A (en) * 1979-03-19 1980-10-29 Fidus Controls Ltd Vehicles equipped with power take-off apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2727467A1 (en) * 1994-11-28 1996-05-31 Belet Jean Yves Manually controlled engine electronic ignition system
WO2005028240A1 (en) * 2003-09-24 2005-03-31 Volvo Lastvagnar Ab Method for regulating the rotational speed of a clutch-independent power take-off
US7357753B2 (en) 2003-09-24 2008-04-15 Volvo Lastvagnar Ab Method for regulating the rotational speed of a clutch-independent power take-off

Also Published As

Publication number Publication date
IT227670Y1 (en) 1997-12-15
GB2272542B (en) 1995-11-22
GB9306842D0 (en) 1993-05-26
FR2697586B3 (en) 1994-09-23
DE9306654U1 (en) 1993-07-22
FR2697586A3 (en) 1994-05-06
ITTO920259V0 (en) 1992-11-03
ITTO920259U1 (en) 1994-05-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010401