Kubota Corporation

Eiji Nishi

Atsushi Shinkai

Keishiro Nishi

Yasunobu Nakatani

Nobuyuki Okabe

Kenji Yoshikawa

Shinnosuke Ishikawa

Keisuke Miura

Atsushi Matsumoto

Takashi Kobayashi

Yoshihiro Kushita

Susumu Umemoto

Toshiya Fukumoto

Keiji Takahashi

Shigeru Komatsu

Kenichiro Yagi

Yuji Tomiyama

Katsuhiko Honda

Muneji Okamoto

Yoichi Sugihara

A driving support information display device includes a status display area controller, a menu display area controller, and a status information controller. The status display area controller manages a status display area having a plurality of status display sections arranged vertically in one side area of a display screen. The menu display area controller manages an upper menu display area having a plurality of selection button sections arranged side by side in an upper area of the display screen and a lower menu display area having a plurality of selection button sections arranged side by side in a lower area of the display screen. The status information controller displays status information in the status display section by providing to the status display area controller status information relating to a functional module assigned to the selection button section that has been touch input.

Driving support information display configuration and device using the same

A display system for a work vehicle is disclosed including a display device () having an information display area (), a display control unit () for controlling the display device, and a display switching command device (A) which outputs a display switching command for switching a display in the display device. The display control unit () selects and sets, based on an output from the display switching command device (A), one or more of an operating time display mode for displaying an operating time of an engine, an instantaneous fuel consumption display mode for displaying an instantaneous fuel consumption, an average fuel consumption display mode for displaying an average fuel consumption, and an amount of used fuel display mode for displaying an amount of used fuel, as a display mode for the information display area ().

Display system for work vehicle having a display switching command device for switching a display in a display device

Provided is a tractor which allows continuation of a plowing work by appropriately elevating a plow when slip occurs in wheels. The tractor includes draft controlling means () for elevating the plow to a target machine body level value obtained by making reference to control information with a draft load value detected by a draft load sensor (S). The control information is set based on a target plowing depth set when the plow was set to a target plowing depth and a draft load value. When a slip ratio detected by a slip ratio acquiring means () exceeds a threshold value, in place of previously set control information, there is newly set control information which renders higher the target machine body level relative to a same draft load value, thereby to elevate the plow.

Tractor

A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means.

Speed control structure and method for work vehicle

An engine speed control system for a work vehicle is disclosed. Storage means () stores a predetermined engine speed. A manually operated input device () issues an instruction to retrieve the engine speed from the storage means (). Engine speed control means () executes a constant speed control, whereby the engine speed stored in the storage means () is set as a target speed on the basis of a first input operation made using the input device (). The engine speed control means () further executes a stored speed change control for allowing the setting of the engine speed stored in the storage means () to be changed based on a second, different input operation performed using the input device ().

Engine speed control system for work vehicle

A load control structure for a work vehicle comprises: set rotation speed detection device for detecting a set rotation of an engine of the work vehicle; actual rotation speed detection device that senses an actual rotational speed of the engine; continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operation of the operating device; wherein the control device calculates a drop amount of the actual engine rotation speed from the set rotation speed based on the detected information from the set rotation speed detection device and the actual rotation speed detection device, and sets a limit operation position for the continuously variable speed change device based on the calculated drop amount and a correlation data that correlates the actual engine rotation speeds with operating positions of the continuously variable speed change device, and controls the operating device such that the operating position of the continuously variable speed change device moves to the limit operating position based on the set limit operating position and detected information from the speed change position detecting device, and wherein the control device has command device for commanding a change of the correlation data.

An engine speed control system for a work vehicle comprises a pedal sensor () for detecting an operative position of an accelerator pedal (); a foot accelerator controller for carrying out foot accelerator control in which the engine speed that corresponds to an output of the pedal sensor () is used as a target rotational speed; and upper limit setting device () for setting the upper limit of the engine speed. The upper limit rotation control in which the upper limit rotational speed is used as the target rotational speed is carried out when the target engine speed is greater than the upper limit rotational speed set by the upper limit setting device ().

An engine controller () includes a first mode control module () for performing a first mode control in which a fuel injection amount in an engine () is obtained based on a first torque-engine rotational speed characteristic, and a second mode control module () for performing a second mode control in which the fuel injection amount is obtained based on a second torque-engine rotational speed characteristic. The first mode control module () has a first engine load estimation part () for estimating an engine load based on a difference in rotational speed between a non-load engine rotational speed and an actual engine rotational speed, and the second mode control module () has a second engine load estimation part () for estimating an engine load based on the fuel injection amount.

Engine controller for work vehicle

The engine speed control system for a work vehicle has a foot accelerator controller for carrying out foot accelerator control based on a pedal sensor, a hand accelerator controller for carrying out hand accelerator control based on a lever sensor, a manually operated input device, storage means for storing a predetermined engine speed, and a constant rotation controller for carrying out constant rotation control in which the engine speed stored in the storage means is used as the target rotational speed on the basis of an input to the input device. The constant rotation control is carried out when the input device has been operated in the case that the engine speed that corresponds to the output of the lever sensor is greater than an idling speed, and the constant rotation control is terminated when the input device is operated in the case that the engine speed that corresponds to the output of the lever sensor is equal to or less than the idling speed.

A speed control structure for a work vehicle comprises: a speed change operating element for manipulation by an operator; a device for detecting operated position of the speed change operating element; a continuously variable speed change device that receives power from an engine of the work vehicle; speed change position detecting device for detecting a speed change operation position of the continuously variable speed change device; operating device for speed-shifting the continuously variable speed change device; control device for controlling the operating means, wherein the control means: sets a target speed change operating position based on detected information by the operated position detection device and a predetermined correlation data that correlates the operated position of the speed change operating element and the speed change operation position of the continuously variable speed change device, and calculates a deviation between the target speed change operating position and of the continuously variable speed change device and the actual speed change operation position based on the set target speed change operating position and detected information from the speed change position detecting device, and sets a target operating speed for the continuously variable speed change device based on the calculated deviation and a further correlation data that correlates the deviation with an operating speed at which the continuously variable speed change device is operated, and controls the operating means such that the continuously variable speed change device is operated toward the target speed change operating position and at the target operating speed.

A load control structure for a work vehicle comprises: a device for detecting operating position of a manually operated speed change operating element; an engine load detection device for detecting load on an engine of the work vehicle; a swash plate position detecting device for detecting an operating position of a swash plate of a variable displacement pump of a hydrostatic continuously variable speed change device; a pump operating device for steplessly operating the swash plate of the variable displacement pump; a motor operating device for operating a swash plate of a variable displacement motor of the hydrostatic continuously variable speed change device between at least two speed change positions including a higher speed position and a lower speed position; a control device for controlling the operations of the pump operating device and the motor operating device. The control device has a automatic pump swash plate control device for controlling the operation of the pump operating device, based on detected information from the load detection device and detected information from the swash plate position detecting device, such that the greater an engine load is, greater is the extent to which the swash plate of the variable displacement pump is operated to a low speed side; and a motor swash plate control device for controlling the motor operating device so as to change the position of the swash plate of the variable displacement motor between the at least two speed change positions.

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Kawachinagano, Japan

Eiji Nishi