JP4625924B2 - Tractor and driving support device - Google Patents

Description

  The present invention relates to a tractor and a driving support apparatus that can be used in the tractor.

Conventionally, when performing various operations with agricultural tractors, the driver operates the accelerator lever or accelerator pedal, travel shift lever, PTO (Power Take Out) shift lever, etc. (driving) so that the target work accuracy can be obtained. The operation conditions such as the engine rotational speed, the traveling speed stage, and the PTO speed stage are freely set by the operation). For this reason, even the agricultural mechanics who have abundant knowledge of agricultural machinery, even in light load work such as fertilization, sowing and control, about half of them are working with the throttle 3/4 or more with low fuel consumption efficiency ( For example, refer nonpatent literature 1). In addition, according to the results of the survey, the ratio of working in an overloaded state with a large amount of black smoke emission reached about 20% in rotary plowing.
Biological Specified Industrial Technology Research Promotion Organization, Summary of Usage Survey Results on Passenger Tractors, pp25, 1992

  FIG. 1 shows the ratio of fuel consumption per tillage volume (a1,...) When rotary tilling is performed with an agricultural tractor while changing the traveling speed stage, the PTO speed stage and the engine speed while keeping the tilling pitch constant at about 6 cm. The condition in b1 is 1.0) (Agricultural Mechanization Research Institute, Biological Specified Industrial Technology Research Support Center, 2003 Business Report, p39, 2004). In FIG. 1, a curve Q1 represents a full load output curve at full throttle, and a curve Q2 represents a partial load output curve at full throttle. In addition, each symbol a1 (●), a2 (▲), a3 (♦), a4 (■), b1 (●), b2 (▲), b3 (◆), b4 (■), PTO speed stage and traveling speed The relationship with the steps is shown in the table below.

図１でのａ1→ａ2→ａ3→ａ4は、ＰＴＯ速度段と走行速度段を１段ずつ上げて行くとともに、ほぼ一定の走行速度になるように機関回転速度を下げていった場合の値である。また、図１でのｂ1→ｂ2→ｂ3→ｂ4は、ＰＴＯ速度段と走行速度段を１段ずつ上げて行くとともに、走行速度が約20％ずつ上昇するように機関回転速度を下げて行った場合の値である。この図から、軽負荷作業時において、点ａ1及びｂ1のように、ＰＴＯ速度段と走行速度段を低く設定し、高い機関回転速度で作業すると、燃料消費量が多くなる問題があることがわかる。

A1 → a2 → a3 → a4 in Fig. 1 is the value when the engine speed is lowered so that the PTO speed stage and the running speed stage are raised one step at a time and the running speed is almost constant. is there. In addition, b1 → b2 → b3 → b4 in FIG. 1 was performed by increasing the PTO speed stage and the traveling speed stage one by one and decreasing the engine speed so that the traveling speed increased by about 20%. Is the case value. From this figure, it can be seen that during light load work, if the PTO speed stage and the traveling speed stage are set low as shown at points a1 and b1 and work is performed at a high engine speed, the fuel consumption will increase. .

  Fig. 2 shows an operating state in which the black smoke concentration of exhaust gas in agricultural tractors is high (Sekiei: Present state of exhaust gas in agricultural tractors, Journal of the Agricultural Machinery Society 64 (1), p14-18, 2002 ). As can be seen from this figure, when the work is performed in an overload state, there is a problem that the black smoke concentration in the exhaust gas increases. In FIG. 2, curves Q1 and Q2 indicate a full load output curve at full throttle and a partial load curve at full throttle, respectively, as in FIG.

  As described above, the driver of the tractor senses the driving conditions such as the driving speed stage, the PTO speed stage, and the engine rotational speed by operating the driving speed change lever, the PTO speed change lever, the accelerator lever or the accelerator pedal (driving operation). Therefore, the selected operating conditions are not always appropriate from the viewpoint of fuel consumption and exhaust gas.

  The present invention has been made in view of such circumstances, and provides a tractor that enables a driver to operate under driving conditions as close as possible to appropriate driving conditions, and a driving support device that can be used in the tractor. It is to provide.

The tractor according to the present invention includes an engine rotational speed detecting means for detecting the rotational speed of the engine, an engine output detecting means for detecting the output of the engine, the engine rotational speed detecting means, and the engine output detecting means. From the engine rotation speed and output, and a judgment map that defines the level of fuel consumption or exhaust gas black smoke concentration, which is determined based on a plurality of engine speed threshold values and a plurality of engine output threshold values. To determine the operating state including the current traveling speed stage and the engine rotational speed, and to change the current traveling speed stage to an appropriate traveling speed stage that improves the fuel consumption or the black smoke concentration. The shift operation information representing the shift operation is generated as driving support information, and the difference between the current travel speed stage and the appropriate travel speed stage where the fuel consumption or the black smoke density is improved, Rotation of the engine for improving the current operating state calculated based on the rate of change of the traveling speed with respect to the unit change of the traveling speed stage and the rotational speed of the engine detected by the engine rotational speed detecting means Driving support information generating means for generating speed as driving support information and driving support information presenting means for presenting the driving support information to the driver are provided.

With this configuration , the rotational speed and output of the engine are detected in the course of various fluctuations in the rotational speed and output of the engine, and the current operating state is improved based on the detected rotational speed and output of the engine. Driving support information is generated and presented to the driver. The driver can perform a driving operation according to the presented driving support information. Further, the driver can obtain, as driving support information, a shift operation for changing the current travel speed stage to an appropriate travel speed stage, for example, shift operation information indicating the number of operation stages of the travel shift lever. An appropriate engine speed for the changed travel speed stage can be obtained as driving support information.

  The driving condition is a driving condition determined by a driving operation. For example, a driving speed stage determined by operating a driving speed change lever of a tractor, and a work machine to which power from an engine is to be supplied via a PTO shaft are connected. If the tractor is operated, the PTO speed stage determined by the operation of the PTO speed change lever, or the rotational speed of the engine determined by the operation of the accelerator lever or the accelerator pedal together with the operation of the travel speed change lever or the PTO speed change lever, etc. The operating condition can be set.

  The appropriate operating condition is an operating condition determined to be appropriate from a predetermined viewpoint, for example, from the viewpoint of fuel consumption, or from the viewpoint of the black smoke concentration of exhaust gas if the engine is a diesel engine. Appropriate operating conditions can be determined.

  In the tractor according to the present invention, the engine output detecting means is detected by an exhaust temperature detecting means for detecting an exhaust temperature of the engine, an exhaust temperature detected by the exhaust temperature detecting means, and the engine rotational speed detecting means. And a calculation means for calculating the output of the engine based on the rotational speed.

  With such a configuration, the output of the engine can be obtained based on the rotational speed of the engine and the exhaust temperature of the engine without directly detecting the output of the engine.

In the tractor according to the present invention, when a work machine to which power from the engine is to be supplied via the PTO shaft is connected , the driving support information generating means sets the current PTO speed stage to an appropriate PTO speed. PTO speed change operation information representing a PTO speed change operation for changing to a stage can be generated as the driving support information.

  With such a configuration, the driver obtains, as driving support information, PTO shift operation information indicating the number of operation steps of the PTO shift lever, for example, PTO shift operation for changing the current PTO speed step to an appropriate PTO speed step. be able to.

Additionally, tractor of the present invention, the the driving support information generation unit, a difference between the current PTO speed stage and the proper PTO speed stage, the PTO rotational speed variation rate with respect to a unit change of the PTO speed stage, the engine rotational The engine may be configured to calculate, as the support information, the rotation speed of the engine that is an appropriate operating condition based on the rotation speed of the engine detected by the speed detection means.

  With such a configuration, the driver can change the current PTO speed stage to the appropriate PTO speed stage, PTO speed change operation information indicating the PTO speed change operation, and the engine suitable for the changed PTO speed stage. Can be obtained as driving support information.

  The tractor according to the present invention may be configured such that the driving support information presenting means includes voice output means for outputting the driving support information by voice.

  With such a configuration, a driver who concentrates on driving operation can obtain driving assistance information as voice.

  Moreover, the tractor of this invention can be set as the structure in which the said driving assistance information presentation means has a display means to display and output the said driving assistance information as an image. With such a configuration, the driver can visually obtain driving support information.

The driving support apparatus according to the present invention includes an engine rotation speed detection unit that detects a rotation speed of the tractor engine, an engine output detection unit that detects an output of the engine of the tractor, the engine rotation speed detection unit, and the engine output detection. The amount of fuel consumption or the concentration of black smoke in the exhaust gas determined based on the rotational speed and output of the engine detected by the means, a plurality of rotational speed threshold values and a plurality of engine output threshold values is The operating state including the current traveling speed stage and the rotational speed of the engine is determined from the prescribed determination map, and the current traveling speed stage is determined to be appropriate for improving the fuel consumption or the black smoke concentration. Shift operation information representing a shift operation for changing to the travel speed stage is generated as driving support information, and the current travel speed stage and the fuel consumption amount or the black smoke density are improved. The current value calculated based on the difference from the positive travel speed stage, the rate of change of the travel speed with respect to the unit change of the travel speed stage, and the engine speed detected by the engine speed detector. The driving support information generating means for generating the rotation speed of the engine for improving the driving state as driving support information and the driving support information presenting means for presenting the driving support information to the driver are provided. Each of these means can be configured similarly to the configuration described above with respect to the tractor.

  According to the present invention, the driver can perform the driving operation according to the driving support information for setting the current driving condition to the appropriate driving condition, so that the driving can be performed under the driving condition closer to the appropriate driving condition. Become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 3, the agricultural tractor 100 is connected to a work machine 200 for performing operations such as tillage, fertilization, sowing, and control. The agricultural tractor 100 has a PTO (Power Take Out) shaft 40 connected to an engine (for example, a diesel engine), and power from the engine is transmitted to the work machine 200 via the PTO shaft 40. Further, a monitor device 20 for presenting various information to the driver is provided at a predetermined front portion of the agricultural tractor 100. In the vicinity of the driver's seat, a traveling speed change lever 31, a PTO speed change lever 32, an accelerator lever are provided. 33 and an accelerator pedal 34 are provided.

  The driving condition indicating device (driving support device) according to the embodiment of the present invention is configured as shown in FIG.

  In FIG. 4, the driving support apparatus includes a control unit 10, a PTO switch 11, a rotation sensor 12, an exhaust temperature sensor 13, a storage unit 15, an audio output circuit 16, and a display output circuit 17. The speaker 21 and the display unit 22 (for example, LCD panel) are included. The PTO switch 11 is attached to the PTO speed change lever 32 of the agricultural tractor 100, and outputs a PTO operation position signal corresponding to the stage (for example, 1st to 4th stages) and whether or not the PTO is used. The rotation sensor 12 detects the rotation speed of the output shaft of the engine and outputs a rotation speed signal according to the rotation speed (hereinafter referred to as the engine rotation speed). The exhaust temperature sensor 13 detects the temperature of exhaust gas passing through the exhaust pipe of the engine and outputs an exhaust temperature detection signal corresponding to the temperature. The control unit 10 generates driving support information as described later based on the PTO operation position signal from the PTO switch 11, the rotation speed signal from the rotation sensor 12, and the exhaust temperature detection signal from the exhaust temperature sensor 13. The driving support information is output as audio from the speaker 22 of the monitor device 20 via the audio output circuit 16. Further, the driving support information can be displayed on the display unit 22 of the monitor device 20 via the display output circuit 17.

  The storage unit 15 stores a determination map (ROM table or the like) of the operating state region determined based on the engine rotation speed and the engine output shown in each of FIGS. In each of FIGS. 5 to 8, the region sandwiched between the full load output curve Q1 at full throttle and the partial load curve Q2 at full throttle is divided into a plurality of operating state regions.

  FIG. 5 shows an operation state region that is applied when the PTO speed stage is “1st speed” in the PTO 4-speed agricultural tractor 100. Specifically, there are five operating state regions (1) to (5) specified by nine engine speed threshold values A to I and thirteen engine output threshold values a to m.

In this case, for example, the operation state region (5) is
“The engine speed is A or more and the engine output is 1 or less” and “The engine speed is B or more and A or less and the engine output is m or less”
It is specified by the condition.

  FIG. 6 shows an operation state region that is applied when the PTO speed stage is “2nd speed” in the PTO 4-speed agricultural tractor 100. Specifically, there are four operating state regions (1) to (4) specified by engine speed thresholds A to I and engine thresholds a to m.

In this case, for example, the operation state region (4) is
“The engine speed is A or more and the engine output is h or less”,
"The engine speed is B or more and A or less, and the engine output is j or less",
“Engine rotation speed is C or more and B or less and engine output is 1 or less” and “Engine rotation speed is D or more and C or less and engine output is m or less”
It is specified by the condition.

  FIG. 7 shows an operation state region that is applied in the case of an operation condition in which the PTO speed stage is “third speed” in the agricultural tractor 100 with four-speed PTO shift. Specifically, there are three operating state regions (1) to (3) specified by engine rotation thresholds A to I and engine thresholds a to m.

In this case, the operation state region (3) is
“The engine speed is A or more and the engine output is e or less”,
"The engine speed is B or more and A or less, and the engine output is g or less",
“The engine speed is C or more and B or less and the engine output is h or less”,
"The engine speed is D or more and C or less and the engine output is j or less",
“The engine speed is F or more and D or less and the engine output is 1 or less” and “The engine speed is G or more and F or less and the engine output is m or less”
It is specified by the condition.

  FIG. 8 shows an operation state region applied to the agricultural tractor 100 that does not use the PTO. Specifically, there are operating state regions (1) to (5) specified by engine speed threshold values A to I and engine output threshold values a to m.

In this case, the operation state region (5) is
“The engine speed is A or more and the engine output is 1 or less” or “The engine speed is B or more and A or less and the engine output is m or less”
It is specified by the condition.

  Each operation state region described above is divided based on the viewpoint of fuel consumption and the black smoke concentration in the exhaust gas. For example, in the example shown in FIG. 5, the driving state region (1) is a region where the fuel consumption is appropriate, and the fuel consumption deteriorates in the order of the driving state regions (3), (4), and (5). The operation state region (2) is an overload region, and is the region where the black smoke concentration in the exhaust gas is the highest. In this case, the operating conditions (running speed stage, PTO speed stage, engine speed) for setting the operating state (engine speed and engine output) in the operating state region (1) are the appropriate operating conditions. In the examples shown in FIGS. 6 to 8, the operation state region (1) corresponds to the proper operation condition.

  The operation state region determination map stored in the storage unit 15 is associated with each operation condition. That is, the determination map of the driving state area shown in FIG. 5 for the driving condition where the PTO speed stage is “1st speed”, and the determination map of the driving state area shown in FIG. The driving condition region determination map shown in FIG. 7 is associated with the driving condition where the PTO speed stage is “3rd speed”, and the driving condition region determination map shown in FIG. 8 is associated with the condition where the PTO is not used. .

  In addition, the storage unit 15 operates corresponding to each operation state region for each operation condition (condition that the PTO speed stage is “1st speed”, “2nd speed”, “3rd speed”, and PTO is not used). Stores support messages (driving support information).

  In the case shown in FIG. 5 (when the PTO speed stage is “1st speed”), the driving assistance message by voice corresponding to each driving state area is as shown in the following table.

図６に示す場合（ＰＴＯ速度段が「２速」の場合）、各運転状態領域に対応する音声による運転支援メッセージは次表の通りである。

In the case shown in FIG. 6 (when the PTO speed stage is “2nd speed”), driving assistance messages by voice corresponding to each driving state area are as shown in the following table.

図７に示す場合（ＰＴＯ速度段が「３速」の場合）、各運転状態領域に対応する音声による運転支援メッセージは次表の通りである。

In the case shown in FIG. 7 (when the PTO speed stage is “3rd speed”), driving assistance messages by voice corresponding to each driving state area are as shown in the following table.

図８に示す場合（ＰＴＯを用いない場合）、各運転状態領域に対応する音声による運転支援メッセージは次表の通りである。

In the case shown in FIG. 8 (when PTO is not used), the driving support message by voice corresponding to each driving state area is as shown in the following table.

  Each driving support message stored in the storage unit 15 corresponding to each driving state area described above is changed from the driving state in the corresponding driving state area to the driving state in the driving state area (1). It includes shift operation information that represents a shift operation for changing the travel speed stage to an appropriate travel speed stage (“lower the travel speed stage”, “increase the travel speed stage”) (Table 2). To Table 5). In addition, when PTO is used, each driving support message changes the current PTO travel stage to an appropriate PTO so that the driving state in the corresponding driving state region is changed to the driving state in the driving state region (1). It includes PTO speed change operation information indicating a PTO speed change operation for changing to a speed stage ("PTO is increased ...") (see Tables 2 to 4).

  It should be noted that the engine rotational speed that is an appropriate operating condition is calculated as described later, and a value expressed by the calculation, for example, in units of 100 rpm is inserted into each driving support message (*** rpm). portion).

  The control unit 10 performs processing according to the procedure shown in FIG.

  In FIG. 9, the control unit 10 inputs the rotational speed signal from the rotational sensor 12 to acquire the engine rotational speed (S1), and inputs the exhaust temperature detection signal from the exhaust temperature sensor 13 to determine the exhaust temperature of the engine. Obtain (S2). The control unit 10 estimates and calculates the engine output based on the engine rotation speed and the exhaust temperature (S3). In an engine (for example, a diesel engine), there is a predetermined relationship among the engine rotation speed, the exhaust temperature, and the engine output, and the engine output can be calculated based on the relationship. Further, it is preferable to measure the engine rotation speed and the exhaust temperature for a certain period (for example, 10 seconds) and calculate the engine output using the average value. When the calculation of the engine output is completed, the control unit 10 inputs the PTO operation position signal from the PTO switch 11 and acquires the operation position of the PTO shift lever 32 (S4).

  Next, the control unit 10 uses the operation state area determination map stored in the storage unit 15 corresponding to the PTO speed stage based on the acquired operation position of the PTO speed change lever 32, and acquires the engine rotation. An operating state region corresponding to the speed and the calculated engine output is determined (S5). For example, when the PTO speed stage is “1st speed”, the determination map shown in FIG. 5 is used, and the acquired engine rotational speed is A or more and the calculated engine output is 1 or less. For example, the operation state region (5) is obtained as the determination result.

The control unit 10 generates driving support information (driving support message) corresponding to the obtained driving state region (S6). Specifically, a driving support message corresponding to the PTO speed stage and the obtained driving state region is selected from the driving support message (see Tables 2 to 5) stored in the storage unit 15 (S6a). . For example, when the PTO speed stage is “1st speed” and the operation state region (5) is obtained,
“In order to improve fuel economy, increase the PTO speed stage and the traveling speed stage by three stages, and set the engine speed to about *** rpm.”
Is selected (see Table 2).

Next, the control unit 10 determines the difference Δ between the current travel speed stage included in the selected driving assistance message and the appropriate travel speed stage (for example, “To improve fuel efficiency, the PTO speed stage and the travel speed stage Is increased by 3 steps and the engine speed is set to about *** rpm "is selected (" 3 "), and when the travel speed step is changed by 1 (unit changed) ) Using the travel speed change rate α (which is preset in accordance with the performance of the agricultural tractor 100) and the acquired engine rotational speed Nn,
Nt = Nn / (1 + α × Δ) (1)
(S6b). The appropriate engine speed Nt is calculated in units of 100 rpm, for example. As a result, an engine speed having a value smaller than the current engine speed Nn (acquired engine speed) is calculated as an appropriate engine speed Nt. That is, it contributes to fuel consumption reduction (see FIG. 1).

When the engine rotational speed Nt is calculated, the control unit 10 inserts the engine rotational speed Nt into the selected driving assistance message to generate a final driving assistance message. For example,
“In order to improve fuel economy, increase the PTO speed stage and the traveling speed stage by three stages, and set the engine speed to about Nt rpm.”
Is generated as the final driving support message.

  When the final driving support message is generated in this way, the control unit 10 supplies the driving support message to the voice output circuit 16 (S7). Then, the voice output circuit 16 supplies a voice signal corresponding to the driving support message to the speaker 21, so that the driving support message is output as voice from the speaker 21.

  The driver who has heard the driving assistance message output by voice operates the traveling speed lever 31 and the PTO speed lever 32 according to the driving speed message, and the traveling speed stage where the current traveling speed stage and the PTO speed stage can be in an appropriate driving state. And can be switched to the PTO speed stage. Further, the driver can operate the accelerator lever 33 or the accelerator pedal 34 so that the engine speed included in the driving support message can be obtained. As a result, the agricultural tractor 100 can travel under more appropriate operating conditions (running speed stage, PTO speed stage, engine speed) from the viewpoints of fuel consumption efficiency (fuel consumption) and black smoke concentration of exhaust gas. become.

The engine speed Nt to be inserted into the driving support message can also be calculated by the following equation (2). That is, the difference Δpto between the current PTO speed stage included in the driving support message and the appropriate PTO speed stage (for example, “In order to improve fuel efficiency, the PTO speed stage and the traveling speed stage are increased by 3 stages, If the driving assistance message “Please set the speed to about *** rpm” is selected, “3”) and the PTO rotational speed change αpto when the PTO speed stage is changed by one (when the unit is changed) Using the acquired engine speed Nn, Nt = Nn / (1 + αpto × Δpto) (2)
Accordingly, an appropriate engine speed Nt can be calculated. Also in this case, an engine rotational speed having a value smaller than the current engine rotational speed Nn (acquired engine rotational speed) is calculated as an appropriate engine rotational speed Nt.

  In the above-described driving support device, driving support information (driving support message) is output as a voice, but can be displayed on the display unit 22. In this case, for example, driving support information as shown in FIG. 10 can be displayed.

  In FIG. 10, the driving support information includes background information indicating a plurality of operating state regions determined based on the engine rotational speed and the engine output in the same manner as described above, and the acquired engine rotational speed. It is composed of marks (●) attached at positions corresponding to the calculated engine output. Each driving state area of the background information indicates a fuel consumption state (“bad fuel consumption”, “slightly bad fuel consumption”, “good fuel consumption”, “good fuel consumption”) and a black smoke state (“black smoke”). Information is added. Further, if the display unit 22 can display in color, each operation state area of the background information is color-coded according to the fuel consumption state and the black smoke state ("red", "yellow", "yellow green"). , “Green”, “grey”).

  The control unit 10 generates the background information and the mark (●) to be superimposed and displayed at a position corresponding to the engine rotation speed and the engine output of the background information as driving support information. Then, the driving support information is provided to the display unit 22 via the display output circuit 17, and the driving support information as shown in FIG.

  The driver who sees such driving support information displayed on the display unit 22 determines the current driving state area (for example, “yellow” driving state with “slightly bad fuel consumption”) depending on the position of the mark (●). In order to realize the driving state within the driving state region of “good fuel consumption” (“green”), for example, the traveling shift lever 31, the PTO shift lever 32 and the accelerator lever 33 or the accelerator pedal are used. 34 can be operated to switch the current traveling speed stage, PTO speed stage and engine rotational speed (current operating conditions) to appropriate traveling speed stage, PTO speed stage and engine rotational speed (appropriate operating conditions). .

It is the figure which showed the ratio of the fuel consumption per tilling volume when rotary plowing was performed with the agricultural tractor, changing a traveling speed stage, a PTO speed stage, and an engine rotational speed. It is the figure which showed the driving | running state in which the black smoke density | concentration of exhaust gas in an agricultural tractor is high. It is a figure which shows the agricultural tractor with which the working machine was connected. It is a block diagram which shows the driving assistance apparatus of the agricultural tractor which concerns on embodiment of this invention. FIG. 6 is a determination map (in the case where the PTO speed stage is “1st speed”) of an operation state region determined based on the engine rotation speed and the engine output. 6 is a determination map of an operating state region determined when the engine rotational speed and the engine output are determined (when the PTO speed stage is “second speed”). 6 is a determination map of an operating state region determined when the engine rotational speed and the engine output are determined (when the PTO speed stage is “3rd speed”). It is a determination map (when not using PTO) of the driving | running state area | region determined based on an engine speed and an engine output. It is a flowchart which shows the process sequence of a control unit. It is a figure which shows an example of the driving assistance information displayed and output.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Control unit 11 PTO switch 12 Rotation sensor 13 Exhaust temperature sensor 15 Memory | storage unit 16 Audio | voice output circuit 17 Display output circuit 20 Monitor apparatus 21 Speaker 22 Display unit 31 Traveling shift lever 32 PTO shift lever 33 Accelerator lever 35 Accelerator pedal 40 PTO shaft 100 Agricultural tractor 200 working machine

Claims (7)

Engine rotation speed detection means for detecting the rotation speed of the engine;
Engine output detecting means for detecting the output of the engine;
Fuel consumption determined based on the rotation speed and output of the engine detected by the engine rotation speed detection means and the engine output detection means, a plurality of rotation speed threshold values, and a plurality of engine output threshold values Or, from the determination map in which the magnitude of the black smoke concentration of the exhaust gas is defined, the current running speed stage and the operating state including the rotation speed of the engine are determined, and the current running speed stage is determined based on the fuel consumption amount, Alternatively, shift operation information representing a shift operation for changing to an appropriate travel speed stage in which the black smoke density is improved is generated as driving support information, and the current travel speed stage and the fuel consumption amount or the black The difference from the appropriate travel speed stage where the smoke density is improved, the rate of change of the travel speed with respect to the unit change of the travel speed stage, and the engine speed detected by the engine speed detection means And driving support information generating means for generating a rotational speed of the engine to improve the current driving state, which is calculated on the basis of a driving support information,
A tractor comprising driving support information presenting means for presenting the driving support information to the driver. The engine output detection means includes exhaust temperature detection means for detecting the exhaust temperature of the engine,
2. An operation means for calculating an output of the engine based on an exhaust temperature detected by the exhaust temperature detection means and a rotation speed detected by the engine rotation speed detection means. Tractor. When a working machine to which power from the engine is to be supplied via a PTO shaft is connected ,
The driving support information generation means includes PTO shift operation information representing a PTO shift operation for changing the current PTO speed stage to an appropriate PTO speed stage that improves the fuel consumption or the black smoke concentration. claim 1 or 2 tractor, wherein the generating a driving support information. Before SL driving support information generating means, and the difference between the correct PTO speed stage by the current PTO speed stage and the fuel consumption, or the black smoke density can be improved, PTO rotational speed for a unit change of the PTO speed stage Based on the rate of change and the rotation speed of the engine detected by the engine rotation speed detection means, there is provided means for calculating the rotation speed of the engine for improving the current operation state as the driving support information. The tractor according to claim 3 . The tractor according to any one of claims 1 to 4 , wherein the driving support information presenting means includes voice output means for outputting the driving support information by voice. Said driving support information presenting means, the tractor according to any one of claims 1 to 5, characterized in that it has a display means for displaying and outputting the driving support information in the image. Engine rotational speed detecting means for detecting the rotational speed of the tractor engine;
Engine output detecting means for detecting the output of the tractor engine;
Fuel consumption determined based on the rotation speed and output of the engine detected by the engine rotation speed detection means and the engine output detection means, a plurality of rotation speed threshold values, and a plurality of engine output threshold values Or, from the determination map in which the magnitude of the black smoke concentration of the exhaust gas is defined, the current running speed stage and the operating state including the rotation speed of the engine are determined, and the current running speed stage is determined based on the fuel consumption amount, Alternatively, shift operation information representing a shift operation for changing to an appropriate travel speed stage in which the black smoke density is improved is generated as driving support information, and the current travel speed stage and the fuel consumption amount or the black The difference from the appropriate travel speed stage where the smoke density is improved, the rate of change of the travel speed with respect to the unit change of the travel speed stage, and the engine speed detected by the engine speed detection means And driving support information generating means for generating a rotational speed of the engine to improve the current driving state, which is calculated on the basis of a driving support information,
A driving support apparatus comprising driving support information presenting means for presenting the driving support information to the driver.

Images