KR101514884B1 - Driving method of hybrid-tractor engine system and hybrid-tractor engine using it - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine and a motor-generator driving method of a hybrid tractor, a hybrid tractor engine system and a hybrid tractor using the same, and more particularly to improve fuel consumption efficiency of a hybrid tractor. A method for driving an engine and a motor-generator of a hybrid tractor, the method comprising the steps of: i) starting a tractor internal combustion engine (s100); ii) a target speed Sw setting step s200; iii) an engine idling (Re) setting step (s300); iv) a step of setting a speed ratio n (s400); v) setting a reference engine speed Rs (s500); vi) travel and work steps (s600); vii) determining whether the engine is overloaded or underloaded (s700); A motor driving step (s800) of the engine overload section motor-generator 400; ix) charging the battery 600 (s900); And a driving method of the motor-generator.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid tractor engine and a hybrid-tractor engine using the hybrid tractor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine and a motor-generator driving method of a hybrid tractor, a hybrid tractor engine system and a hybrid tractor using the same, and more particularly to improve fuel consumption efficiency of a hybrid tractor.

 Generally, a hybrid vehicle refers to a vehicle driven by using two power sources, and uses the battery 600 as an energy storage device of the hybrid vehicle. The hybrid vehicle as described above includes a generator, a rechargeable battery 600, a motor, and the like in addition to the structure of an existing internal combustion engine in order to achieve a high fuel efficiency. The mechanical energy for driving the vehicle generated from the engine It is used as a power source for a vehicle and as a generator input. The mechanical energy of the engine transmitted to the generator is outputted as electrical energy by rotating the rotor of the generator. The electrical energy output from the generator is stored in the battery 600, and is transmitted to the engine together with the mechanical energy Or as a driving force for independently driving the vehicle.

Hybrid cars and hybrid tractors have big differences in driving methods. FIG. 1 is a graph illustrating a difference in a driving method between a hybrid vehicle and a hybrid tractor.

The main operation region of the hybrid vehicle is shifted from the idling state (Idle) to the maximum torque point, and the shift occurs near or below the maximum torque point. The vehicle starts from the idling state and determines the torque amount of the engine in accordance with the driver's manipulated amount of the accelerator (acceleration will). The vehicle is accelerated or decelerated by the difference between the running load (air resistance, road surface, inclination) do. In other words, the driver's intention is to change the speed of the vehicle.

On the other hand, in the hybrid tractor, the main operation range is from the high idle state to the maximum torque point, and in order to work at a constant speed, the idle speed (high idle) or constant engine speed .

During operation, the engine torque is generated by the work load (resistance), and when the load is greater than the maximum torque that can be generated in the set speed lever state, the engine speed decreases. In other words, the factor that changes the speed of the vehicle is that the speed of the tractor is determined by the workload in contrast to the driver's will.

Publication No. 10-2012-0009954 discloses a hybrid work vehicle and a hybrid work vehicle, characterized in that the load fluctuation is determined by using a displacement of flywheel or fly ball in a governor, and the motor-generator 400 is controlled in accordance with the load fluctuation And a control method thereof. The hybrid working vehicle according to an embodiment of the present invention senses the variation of the load with the variation amount of the flywheel or the fly ball measured by using the displacement measuring device, and when the load increases, the motor- And when the load is reduced, the motor-generator 400 is driven as a generator to recover the energy. In this manner, the rotational speed of the diesel engine can be quickly and accurately detected based on the change in the position of the flywheel or the fly ball, without requiring the installation of a complicated device such as a load torque measuring device, and by controlling the motor- It improves the energy efficiency of the hybrid working vehicle and improves the riding comfort of the driver. However, the above-described invention does not take into account the fuel consumption amount in the high output section, and thus has a problem in that the fuel consumption amount management can not be expected.

2 is a graph showing a working area of a conventional hybrid tractor.

Conventional hybrid tractors prefer the general operators to have high working efficiency (short working time), and because the torque margin in the high output area (the difference between the maximum torque and the torque at the working engine speed) is large, The engine is stalled or the engine can escape without shifting. Therefore, the engine is operated in a high output range rather than a high efficiency range. However, as shown in the graph, the high output region has a problem in that the fuel consumption is high due to the high fuel consumption rate in the high output region.

That is, in the hybrid tractor according to the present invention, the motor-generator 400 is driven by the motor to assist the motor when the motor is overloaded, the motor-generator 400 is driven by the generator when the motor- To work in a high efficiency region in which the fuel consumption rate is low without operating in a large high output region.

Accordingly, the present invention provides a method of driving an engine and a motor-generator of a hybrid tractor,

i) a starting step (s100) of the tractor internal combustion engine;

ii) a target speed Sw setting step s200;

iii) an engine idling (Re) setting step (s300) for setting the engine idling (Re) by adjusting the opening / closing rate of the throttle;

iv) determining, based on the throttle opening / closing rate having the idle revolutions (Re)

(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)

A speed ratio n setting step (s400) for setting a speed ratio n within a range in which (Expression 1) is satisfied;

v) Under the application of the speed ratio n,

(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)

A reference engine speed Rs setting step s500 for setting the high speed minimum fuel consumption speed Rf corresponding to the lowest fuel consumption rate to a value of the reference engine speed Rs within a range in which the expression (1) ;

vi) travel and work steps (s600);

vii) determining whether the engine is overloaded or underloaded (s700);

(viii) An engine overload section motor-generator 400 that receives electricity from the battery 600 during an overload of the engine during operation and drives the motor of the motor-generator 400 to increase the torque of the drive shaft. (s800);

ix) charging the battery 600 by driving the generator of the motor-generator 400 in a low load period of the engine to charge the battery 600 (s900);

The present invention provides a hybrid tractor engine and a motor-generator driving method, which solve the above problems.

According to the present invention, when the motor-generator 400 is overloaded, the motor-generator 400 is driven by the motor to assisting the power. The motor-generator 400 is driven by the generator at the time of low load to recover the energy. It is possible to prevent the stall of the engine due to the overload while improving the fuel efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph illustrating an operation area of an automobile and a tractor.
2 is a graph for explaining an operation region of a conventional hybrid tractor.
3 is a flowchart illustrating an algorithm of an engine and a motor-generator driving method of a hybrid tractor;
4 is a graph illustrating a method of driving an engine and a motor-generator of a hybrid tractor of the present invention.
5 is a graph for explaining the engine idling (Re) setting step (s300) of the present invention.
6 is a graph for explaining a driving process in a high-efficiency region;
7 is a graph for explaining a driving process in a high-efficiency region;
8 is a block diagram of the construction of the machine-hydraulic engine and motor-generator system of the present invention.
9 is a block diagram of the configuration of an electronically controlled engine and motor-generator system of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine and a motor-generator driving method of a hybrid tractor, a hybrid tractor engine system and a hybrid tractor using the same, and more particularly to improve fuel consumption efficiency of a hybrid tractor. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an internal combustion engine (100), an engine control unit (200) for controlling the engine speed (rpm) per minute of the engine, a transmission (300) for shifting the rotational speed of the engine A motor-generator control unit 500 for controlling the motor-generator 400; a battery 600 for supplying and storing power to the motor-generator 400; And a battery controller (700) for controlling the battery (600). In the driving method of the engine and the motor-generator of the hybrid tractor, as shown in the flowchart of FIG. 3,

i) starting step s100 of the tractor internal combustion engine 100;

ii) a target speed Sw setting step s200;

iii) an engine idling (Re) setting step (s300) for setting the engine idling (Re) by adjusting the opening / closing rate of the throttle;

iv) determining, based on the throttle opening / closing rate having the idle revolutions (Re)

(Formula 1) Vehicle Speed (Sv) ≥ Target Speed (Sw)

A speed ratio n setting step (s400) for setting a speed ratio n within a range in which (Expression 1) is satisfied;

v) Under the application of the speed ratio n,

(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)

A reference engine speed Rs setting step s500 for setting the high speed minimum fuel consumption speed Rf corresponding to the lowest fuel consumption rate to a value of the reference engine speed Rs within a range in which the expression (1) ;

vi) travel and work steps (s600);

vii) determining whether the engine is overloaded or underloaded (s700);

(viii) An engine overload section motor-generator 400 that receives electricity from the battery 600 during an overload of the engine during operation and drives the motor of the motor-generator 400 to increase the torque of the drive shaft. (s800);

ix) charging the battery 600 by driving the generator of the motor-generator 400 in a low load period of the engine to charge the battery 600 (s900);

And a driving method of the motor-generator.

The target speed Sw setting step s200 may allow the user to set the target speed Sw through the input means of the engine control unit. The engine idling (Re) setting step (s300) for adjusting the engine idling (Re) by adjusting the opening and closing rate of the throttle adjusts the opening and closing rate of the throttle of the engine through the governor device And the engine idling (Re) can be set. As shown in FIG. 4, when the driver sets the position of the throttle according to the purpose or preference, the performance curve of the engine is determined according to the setting of the idling current (Re) (s300). Since the engine performance curve determined above includes not only the torque curve (a) and the output curve (b) but also the fuel consumption rate curve (c), the maximum efficiency point according to the engine throttle position also varies. The set rotation speed set by adjusting the opening / closing rate of the throttle is the number of rotations in a high idle state, and the number of revolutions is reduced or recovered according to the load of the work.

The engine idling speed Re setting step s300 of setting the engine idling frequency Re by adjusting the opening and closing rate of the throttle is performed in order to obtain the fuel consumption rate curve c by using the fuel consumption rate And a calculating step (s310).

The step of setting the speed ratio n (s400)

When the engine speed Rv according to the vehicle speed Sv is located in the high consumption area HF on the fuel consumption curve on the fuel consumption rate-engine speed graph, the step of presenting the driver with a higher gear ratio n (s410).

As shown in FIG. 5, the maximum number of speeds for each speed change stage is set according to the set engine speed, and a speed at which a speed higher than the target speed set in the target speed Sw setting step s200 is set . In the graph shown in FIG. 5, the fourth and fifth stages have a larger value than the target speed.

The high consumption area (HF) on the fuel consumption curve,

Fuel consumption rate-on the engine speed graph, it is preferable that the engine speed is defined as an area that is larger than the high-rotation minimum fuel consumption rotation speed Rf corresponding to the high-rotation minimum fuel consumption point F. The high-rotation minimum fuel consumption point (F) is defined as the point at which the revolution per minute is the highest among the inflection points in the range of 2500 rpm or less on the fuel consumption rate-engine speed graph.

According to such a condition, the reference engine speed Rs can be set in a high-efficiency region with higher fuel efficiency without the engine 1 working at a high output rated rotational speed with a low fuel efficiency.

In the graph of FIG. 6, when the engine speed is set to four stages, the highest efficiency point between the maximum speed and the target speed is the engine rotation speed (1) in which the lowest engine rotation speed at which the target speed can be achieved is the lowest fuel consumption rate.

That is, according to the example in the graph, the engine system is driven in the rated output range, not in the highest efficiency range in the case of the four stages.

However, in the graph of FIG. 6, since the fuel consumption rate is the lowest in the engine revolution number 2 higher than the engine revolution number 3, which gives the same speed as the target speed, the engine revolution number The engine is set to the reference engine speed, in which case the engine will operate in the highest efficiency zone.

Therefore, by presenting the speed ratio that satisfies the condition that the engine speed Rw corresponding to the target speed Sw of the speed ratio n of the following (formula 3) is higher than the high-speed minimum fuel consumption speed Rf, It is possible to drive the engine system with fuel efficiency.

(Formula 3) Rw > Rf

In addition, prior to the step S410 of presenting the driver with a higher gear ratio n, it is preferable to secure the maximum rotation minimum fuel consumption rotation speed Rf and the minimum torque margin corresponding to the high rotation minimum fuel consumption point F (S401) comparing a minimum limit number of rotations (R1) corresponding to a minimum limit torque point (Tl);

(S410) presenting a higher gear ratio n to the driver only when the comparison result satisfies the condition of Rf >Rl;

. This process ensures that the engine speed does not decrease below the minimum limit torque point (T1) in order to ensure a constant torque or higher even if the fuel consumption rate is advantageous.

The minimum limit torque point Tl is a value of 65 to 75% of the maximum torque Tm in the range of the revolution per minute higher than the engine revolution speed corresponding to the maximum torque Tm on the torque- As shown in Fig.

Further, as another embodiment, in the tractor of the electronic engine, the target speed Sw setting step s200 may be such that, when the user sets the target speed Sw through the input means of the engine control unit,

In the step S400 of setting the speed ratio n, the transmission control unit 310, which controls the transmission, determines the throttle opening and closing rate based on the throttle opening /

(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)

The transmission control unit 310 can automatically calculate and set the transmission ratio n in a range that satisfies the formula (1).

The engine speed Rw corresponding to the target speed Sw at the selected speed ratio n is set to a value corresponding to the high rotation minimum fuel consumption rotation speed Rf corresponding to the high rotation minimum fuel consumption point F,

(Formula 2) Rf + 100? Rw? Rf-100

(Equation 2) can be satisfied. This is to ensure an allowable number of revolutions of ± 100 in accordance with the required torque amount based on the maximum rotation minimum fuel consumption rotation speed (Rf).

As described above, the reference engine speed Rs setting step s500 may include a display step s510 for displaying the set reference engine speed Rs to the driver.

As another example, the speed change ratio setting step s400 may set the speed ratio n manually by the user other than the above-described automatic shift step.

During the manual shifting, in the step of setting the speed ratio n,

When the engine speed Rw corresponding to the target speed Sw of the set speed ratio n is larger than the high rotation minimum fuel consumption speed Rf as shown in the following equation 3,

(Formula 3) Rw > Rf

The transmission control unit 310 provides a step S410 of presenting a higher gear ratio n to the driver, thereby inducing a manual shift of the user. The step S410 of presenting the higher gear ratio n may be displayed by the display unit 1000 to the driver and displayed as a guidance sound.

The reference engine speed Rs setting step s500 preferably includes a display step s510 of displaying the setting value on the display part 1000 and providing the driver with the reference engine speed Rs .

In the case of a tractor of an electronic engine, the traveling and working step (s600)

The number of engine revolutions per minute (Rd)

(Formula 4) Rs-200? Rd? Rs + 200

(S610) of maintaining the engine revolution speed per minute (Rd) to maintain the continuous engine revolution speed (Rd) so as to satisfy the equation (4). As described above, since the engine revolution speed per minute is maintained, continuous operation in the high-efficiency section is facilitated. The engine revolution speed maintenance step (s610) for maintaining the engine revolution speed (Rd) per minute is preferably controlled by the engine controller (200).

In step s700 of determining whether the engine is overloaded or underloaded,

The load reference rotation speed (Rlod), which is a criterion for determining the load,

(Expression 5) Rs-200? Rload? Rs

It is preferable that the reference engine speed Rs is equal to or greater than -200 and the reference engine speed Rs is equal to or less than the reference engine speed Rs,

The overload section of the engine is caused by the load of the work during the operation of the tractor

(Expression 6) Rd? Rlod

It is preferable that the engine revolution speed Rd per minute is lowered to the load reference revolution speed Rlod or less as shown in Equation (6).

Reflectively, the low load section of the engine is due to the workload of the tractor during operation

(Expression 7) Rd? Rlod

It is preferable that the engine revolution speed Rd per minute is increased to be equal to or higher than the load reference revolution speed Rlod as shown in Equation (7).

In order to drive the hybrid tractor as described above,

(100) for controlling the engine revolution speed (rpm) per minute of the internal combustion engine,

A motor-generator 400 connected to the engine 100, and a motor-generator controller 500 for controlling the motor-generator 400. The motor- A battery 600 for supplying and storing power to the motor-generator 400; and a battery controller 700 for controlling the battery 600. In the hybrid tractor,

The engine control unit 200 includes a target speed setting unit 210 and a target speed setting unit 210. [

An engine idling (Re) setting module (220) for setting the engine idling (Re) by adjusting the opening / closing rate of the throttle;

At the set speed ratio n,

(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)

A reference engine speed Rs setting module 230 for setting the high rotation minimum fuel consumption rotation speed Rf corresponding to the lowest fuel consumption rate within the range satisfying the expression (1) to the reference engine speed Rs );

A minute engine speed sensing module 240 for sensing the engine speed Rd per minute of running of the engine and the load on the engine;

And a drive system for driving the hybrid tractor.

The transmission control unit 310, which controls the transmission 300,

On the basis of the throttle opening / closing rate having the idling current (Re)

(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)

(N) can be automatically calculated and set within a range that satisfies (Expression 1).

The transmission control unit 310, which controls the transmission 300,

When the engine speed Rv according to the vehicle speed Sv is located in the high consumption area HF on the fuel consumption curve on the fuel consumption rate-engine speed graph, it gives the driver a higher gear ratio n.

The engine control unit 200 controls the operation of the engine

And a display unit 1000.

The transmission 300 may apply a manual transmission for manually setting the speed ratio n.

The engine control unit 200 includes a determination module 250 for determining the load state of the engine in accordance with the engine revolution speed Rd per minute of the engine sensed from the per minute engine revolution sensing module .

The determination module 250, which determines the load state of the engine,

(Expression 5) Rs-200? Rload? Rs

The load reference rotation speed Rlod, which is a reference for determining whether or not a load has a reference engine speed Rs of -200 or more and a reference engine speed Rs or less, is set, State.

The determination module 250, which determines the load state of the engine,

(Expression 6) Rd? Rlod

An overload section of the engine, which is defined as a case where the engine revolution speed per minute Rd is equal to or less than the load reference revolution speed Rlod, is set as shown in Equation (6)

(Expression 7) Rd? Rlod

The low load section of the engine is defined as the case where the engine revolution speed per minute Rd is equal to or greater than the load reference revolution speed Rlod as shown in equation (7).

In addition, the engine control unit 200 of the present invention may employ an electronic engine including an engine revolution speed regulation module 260 for maintaining the engine revolution speed Rd per minute. The minute engine speed control module 260 controls the number of revolutions per minute (Rd) of the engine

(Formula 4) Rs-200? Rd? Rs + 200

(Rd) per minute is maintained so as to satisfy the expression (4).

In addition, in the motor rated torque (Tmg) of the motor-generator (400)

A rated torque Tr which is an engine torque at a rated rotation speed of the engine 100, a maximum torque Tm at a maximum torque point of the engine,

(Expression 8) with respect to the high-efficiency rotation-speed torque Te, which is the engine torque at the high-rotation minimum fuel consumption rotation speed Rf of the engine,

(Equation 8) ............ Tm - Tr? Tmg? Tr - Te

The rated torque Tmg required for the motor-generator 400 can be calculated.

In other words, according to the present invention, when the motor-generator 400 is overloaded, the motor-generator 400 is driven by a motor to assist the motor-generator 400, It is possible to prevent the stall of the engine due to the overload while improving the fuel efficiency by not operating in the large high output region but working in the high efficiency region where the fuel consumption rate is low.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that various changes and modifications will be apparent to those skilled in the art. Obviously, the invention is not limited to the embodiments described above. Accordingly, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which fall within the scope of equivalence by alteration, substitution, substitution, Range. In addition, it should be clarified that some configurations of the drawings are intended to explain the configuration more clearly and are provided in an exaggerated or reduced size than the actual configuration.

100. Engines
200. An engine control unit
300. Transmission
400. Motor-generator
500. Motor-
600. Battery
700. Battery control unit

Claims (35)

An engine control apparatus for an internal combustion engine, comprising an engine control unit (200) for controlling an engine revolution speed (rpm) per minute of the engine, a transmission for shifting the rotational speed of the engine, and a transmission control unit A motor-generator 400 connected to the engine 100; a motor-generator controller 500 for controlling the motor-generator 400; And a battery control unit (700) for controlling the battery (600), the method comprising the steps of:
i) a starting step (s100) of the tractor internal combustion engine;
ii) step (s200) in which the engine control unit sets a target speed Sw;
iii) an engine idling (Re) setting step (s300) in which the engine control unit receives the opening / closing rate of the throttle and sets the engine idling (Re);
iv) When the transmission control unit 310 determines that the throttle opening /
(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)
A speed ratio n setting step (s400) for setting a speed ratio n within a range in which (Expression 1) is satisfied;
v) the engine control unit, under application of the speed ratio n,
(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)
A reference engine speed Rs setting step s500 for setting the high speed minimum fuel consumption speed Rf corresponding to the lowest fuel consumption rate to a value of the reference engine speed Rs within a range in which the expression (1) ;
vi) travel and work steps (s600);
vii) a step (s700) of the engine control unit judging whether the engine is overloaded or underloaded;
viii) If the engine is overloaded in the step vii), the motor-generator control unit 500 receives the electric power from the battery 600 and drives the motor of the motor-generator 400 to rotate the torque of the drive shaft A motor driving step (s800) of the engine overload section motor-generator 400 for increasing the engine overload period;
ix) When the engine is judged to be under a low load condition in the step vii), the motor-generator control unit 500 drives the generator of the motor-generator 400 to charge the battery 600, Charging step (s900);
And the motor-generator is driven by the motor.
The method according to claim 1,
In the step ii), the engine control unit 200 sets the target speed Sw from the user through the input unit. The driving method of the engine and the motor-generator of the hybrid tractor.
The method according to claim 1,
Wherein the engine controller 200 receives the opening and closing rate of the throttle controlled by the user as a governor device of the engine controller 200 in step iii) A method of driving a generator.
The method according to claim 1,
And the step (iii) includes the step (s310) of calculating the fuel consumption rate according to the opening / closing rate of the throttle inputted in the step (ii) of the engine control unit (200) A method of driving a generator.
The method according to claim 1,
If the transmission control unit 310 determines that the engine speed Rv according to the vehicle speed Sv is located in the high consumption area HF on the fuel consumption curve on the fuel consumption rate-engine speed graph, And a step (S410) of presenting a higher speed ratio (n) to the driver (S410).
6. The method of claim 5,
The high consumption area (HF) on the fuel consumption curve,
The engine rotation speed is an area larger than the high rotation minimum fuel consumption rotation speed (Rf) corresponding to the high rotation minimum fuel consumption point (F) on the fuel consumption rate-engine rotation speed graph. .
The method according to claim 6,
Wherein the high-rotation minimum fuel consumption point (F) has the highest revolutions per minute among the inflection points in the range of 2500 rpm or less on the fuel consumption rate-engine rotation speed graph.
6. The method of claim 5,
Prior to step S410 of presenting the driver with a higher gear ratio n,
The engine control unit 200 determines whether or not the engine is in a state where the engine speed is lower than the minimum engine speed Rf corresponding to the high speed minimum fuel consumption point F and the minimum engine speed limit (S40); Further comprising:
And the step (s410) of presenting a higher gear ratio (n) to the driver only when the result of the comparison satisfies the condition of Rf > Rl.
9. The method of claim 8,
The minimum limit torque point Tl is a point having a value of 65-75% of the maximum torque Tm in the range of the revolution per minute higher than the maximum torque Tm on the torque-per-minute engine speed graph. And a drive method of the motor-generator.
delete The method according to claim 1,
The engine speed Rw corresponding to the target speed Sw at the selected speed ratio n is set to a value corresponding to the high rotation minimum fuel consumption rotation speed Rf corresponding to the high rotation minimum fuel consumption point F,
(Formula 2) Rf + 100? Rw? Rf-100
(Formula 2). ≪ / RTI >
The method according to claim 1,
The reference engine speed Rs setting step s500 includes a display step s510 for displaying the set reference engine speed Rs to the driver.
delete 6. The method of claim 5,
Prior to step S410 of presenting the driver with a higher gear ratio n,
The engine control unit 200 compares the engine rotation speed Rw corresponding to the target speed Sw with the high rotation minimum fuel consumption rotation speed Rf (s401); Further comprising:
Only when the result of the comparison satisfies the condition of (Expression 3)
(Formula 3) Rw > Rf
The step (s410) of presenting the driver with a higher number of gear ratios (n) is performed.
6. The method of claim 5,
The step (S410) of presenting the higher gear ratio (n)
The display unit (1000) displays and presents the transmission ratio (n) to the driver. The driving method of the engine and the motor-generator of the hybrid tractor.
The method according to claim 1,
The reference engine speed Rs setting step s500 includes a display step s510 of displaying the setting value on the display unit 1000 and providing the reference engine speed Rs to the driver And a drive method of the motor-generator.
The method according to claim 1,
In the driving and operation step (s600)
If the engine control unit 200 determines that the engine rotation speed Rd per minute
(Formula 4) Rs-200? Rd? Rs + 200
(S610) of maintaining the engine revolution speed per minute (Rd) so as to maintain the continuous engine revolution speed per minute (Rd) so as to satisfy the expression (4);
And the motor-generator is driven by the motor.


delete The method according to claim 1,
In step s700 of determining whether the engine is overloaded or underloaded,
The load reference rotation speed (Rlod), which is a criterion for determining the load,
(Expression 5) Rs-200? Rload? Rs
(Rs) -200 or more and the reference engine speed (Rs) or less, as in the expression (5).
20. The method of claim 19,
The overload section of the engine is caused by the load of the work during the operation of the tractor
(Expression 6) Rd? Rload
Is defined as a case where the engine revolution speed per minute (Rd) falls below the load reference revolution speed (Rload) as in Equation (6).
20. The method of claim 19,
The low load period of the engine is caused by the load of the work during the operation of the tractor
(Expression 7) Rd? Rload
Is defined as a case where the engine revolution speed per minute (Rd) rises above the load reference revolution speed (Rload) as in Equation (7).
An engine control system for an internal combustion engine, comprising an engine control unit (200) for controlling an engine revolution speed (rpm) per minute of the engine, a transmission for shifting the rotation speed of the engine, A battery 600 for supplying and storing electric power to the motor-generator 400, a battery 600 for supplying and storing electric power to the motor-generator 400, And a battery controller (700) for controlling the hybrid vehicle,
The engine control unit (200)
A target speed (Sw) setting module;
An engine idling (Re) setting module for setting the engine idling (Re) by adjusting an opening / closing rate of the throttle;
At the set speed ratio n,
(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)
A reference engine speed Rs setting module for setting the high rotation minimum fuel consumption rotation speed Rf corresponding to the lowest fuel consumption rate within the range satisfying the expression (1) as the value of the reference engine speed Rs;
A rpm sensing module per minute for sensing the number of engine revolutions per minute Rd of the engine and the load on the engine;
And a drive system for driving the hybrid tractor.
23. The method of claim 22,
The transmission control unit 310, which controls the transmission,
On the basis of the throttle opening / closing rate having the idling current (Re)
(Formula 1) ...... Vehicle Speed (Sv)? Target Speed (Sw)
(N) is automatically calculated and set within a range that satisfies the following formula (1): " (1) "
24. The method of claim 23,
The transmission control unit 310, which controls the transmission,
When the engine speed Rv according to the vehicle speed Sv is located in the high consumption area HF on the fuel consumption curve on the fuel consumption rate-engine speed graph, it is possible to give the driver a higher gear ratio n The drive system of the hybrid tractor is characterized by.
23. The method of claim 22,
Wherein the engine control unit (200) includes a display unit (1000) for displaying status information of the engine to a driver.
23. The method of claim 22,
Wherein the transmission is a manual transmission for manually setting a speed ratio n by a user.
23. The method of claim 22,
The engine control unit 200 includes a determination module that determines the load state of the engine according to the engine rotation speed Rd per minute of operation of the engine sensed by the minute rpm sensing module The drive system of the hybrid tractor.
28. The method of claim 27,
A determination module for determining a load state of the engine,
(Expression 5) Rs-200? Rload? Rs
The load reference rotation speed Rload which is a criterion for determining whether or not the load has a reference engine speed Rs of -200 or more and a reference engine speed Rs or less is set
And a drive system for driving the hybrid tractor.
29. The method of claim 28, wherein
A determination module for determining a load state of the engine,
(Expression 6) Rd? Rload
Wherein the overload section of the engine is defined as a case where the engine revolution speed per minute (Rd) is equal to or less than the load reference revolution speed (Rload) as in Equation (6).
29. The method of claim 28, wherein
A determination module for determining a load state of the engine,
(Expression 7) Rd? Rload
Wherein the low load section of the engine is defined as a case where the engine revolution speed per minute (Rd) is equal to or greater than the load reference revolution speed (Rload) as in Equation (7).
23. The method of claim 22,
Wherein the engine control unit (200) includes an engine revolution speed regulation module (C) for maintaining the engine revolution speed (Rd) per minute.
32. The method of claim 31,
The engine revolution speed control module for minute (s) controls the engine revolution speed Rd per minute
(Formula 4) Rs-200? Rd? Rs + 200
(Rd) per minute is maintained so as to satisfy the following expression (4): " (4) "
23. The method of claim 22,
The motor rated torque (Tmg) of the motor-generator (400)
A rated torque Tr which is an engine torque at a rated rotational speed of the engine 100, a maximum torque Tm at a maximum torque point of the engine,
(8) with respect to the high-efficiency rotation-speed torque Te which is the engine torque at the high-rotation minimum fuel consumption rotation speed Rf of the engine,
(Equation 8) ............ Tm - Tr? Tmg? Tr - Te
Of the hybrid tractor
An engine control system for an internal combustion engine, comprising an engine control unit (200) for controlling an engine revolution speed (rpm) per minute of the engine, a transmission for shifting the rotation speed of the engine, A battery 600 for supplying and storing electric power to the motor-generator 400, a battery 600 for supplying and storing electric power to the motor-generator 400, And a battery controller (700) for controlling the hybrid vehicle,
An engine and a method for driving a motor-generator of a hybrid tractor according to any one of claims 1 to 9, 11, 12, 14 to 17 or 19 to 21, And a hybrid tractor of a motor-generator.
An engine control system for an internal combustion engine, comprising an engine control unit (200) for controlling an engine revolution speed (rpm) per minute of the engine, a transmission for shifting the rotation speed of the engine, A battery 600 for supplying and storing electric power to the motor-generator 400, a battery 600 for supplying and storing electric power to the motor-generator 400, And a battery controller (700) for controlling the hybrid vehicle,
An engine and a method for driving a motor-generator of a hybrid tractor according to any one of claims 1 to 9, 11, 12, 14 to 17 or 19 to 21, And the motor-generator hybrid tractor.

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