Disclosed is a solution to the use of a speed limiter in a motorcycle that has a high capacity for acceleration, including a method for limiting the speed of a motorcycle using precise parameters of speed, acceleration and required engine torque and a single control button to manage the smart activation and deactivation of the limiter and to input new speed limits V.sub.lim in a simple way. It thus allows the use of a speed-limiting system in a motorcycle that has a high power/weight ratio by avoiding the sources of interference with the riding and the effects liable to jeopardize its stability.

In a vehicle speed limiter in which an electronic control unit that controls a drive force of an engine based on at least an accelerator opening controls a drive force of a vehicle so that a vehicle speed does not exceed a speed limit, the electronic control unit is configured to allow the vehicle speed to be equal to or higher than the limit vehicle speed and control the drive force generated by the engine based on the accelerator opening when the accelerator opening becomes a value equal to or larger than a increase reference value larger than a decrease reference value after the accelerator opening has decreased to a value equal to or smaller than the decrease reference value within a predetermined time from a time point when the vehicle speed limitation is released during the vehicle speed limitation being executed by the speed limiting control.

In a vehicle speed limiter in which an electronic control unit that controls a drive force of an engine based on at least an accelerator opening controls a drive force of a vehicle so that a vehicle speed does not exceed a speed limit, the electronic control unit is configured to allow the vehicle speed to be equal to or higher than the limit vehicle speed and control the drive force generated by the engine based on the accelerator opening when the accelerator opening becomes a value equal to or larger than a increase reference value larger than a decrease reference value after the accelerator opening has decreased to a value equal to or smaller than the decrease reference value within a predetermined time from a time point when the vehicle speed limitation is released during the vehicle speed limitation being executed by the speed limiting control.

A control device for an automatic transmission in a vehicle with a constant speed travel mode includes: a determination section that determines whether the vehicle is traveling on a slope road; a slope adaptation control section that implements a first transmission shift control if not traveling on a slope road and, if traveling on a slope road, implements a second transmission shift control for selecting a transmission shift position of a lower speed than case of not traveling on a slope road; a delaying section that, upon switching from the second transmission shift control to the first transmission shift control, implements an upshift delay control for performing upshift one by one at a predetermined time interval; and a setting section that, in case of traveling at the constant speed travel mode, sets the time interval shorter in comparison with case of traveling not at the constant speed travel mode.

A work vehicle includes a first actuator driving a differential lock device, a second actuator driving the drive-wheel switchover device, a first operational tool for operating driving of the first actuator, a second operational tool for operating driving of the second actuator and a control device. The control device includes a first driving section configured to drive the first actuator in response to a manual operation on the first operational tool and a second driving section configured to drive the second actuator in response to a manual operation on the second operational tool.

A work vehicle includes a first actuator driving a differential lock device, a second actuator driving the drive-wheel switchover device, a first operational tool for operating driving of the first actuator, a second operational tool for operating driving of the second actuator and a control device. The control device includes a first driving section configured to drive the first actuator in response to a manual operation on the first operational tool and a second driving section configured to drive the second actuator in response to a manual operation on the second operational tool.

Provided are a device for warning of the distance between vehicles and a control method for warning of the distance between vehicles which can further give a sense of security to an occupant. The device for warning of the distance between vehicles comprises: a preceding vehicle specifying unit which specifies a preceding vehicle that travels in front of a vehicle; and a warning output control unit which, when the preceding vehicle is in a stationary state, outputs a warning of the distance between the vehicles from a warning output unit on the condition that the vehicle is executing adaptive cruise control (ACC).

A vehicle control device includes: a three-dimensional object detecting unit, an oncoming vehicle detecting unit, and an erroneous detection determination unit. The three-dimensional object detecting unit detects a three-dimensional object provided between a travel lane in which a host vehicle travels and an opposite lane in which an oncoming vehicle travels. The oncoming vehicle detecting unit detects the oncoming vehicle traveling in the opposite lane. The erroneous detection determination unit determine that the oncoming vehicle detected by the oncoming vehicle detecting unit has been erroneously detected when the oncoming vehicle detected by the oncoming vehicle detecting unit is present within a threshold range from the three-dimensional object detected by the three-dimensional object detecting unit.

A vehicle control device includes a memory configured to store a first target speed applied under a specific traveling situation and a second target speed that is equal to or less than the first target speed and applied to a traveling situation other than the specific traveling situation, and a processor configured to determine whether or not a traveling situation of the vehicle corresponds to the specific traveling situation, control a traveling speed of the vehicle in accordance with the first target speed when a traveling situation of the vehicle corresponds to the specific traveling situation, and control a traveling speed of the vehicle in accordance with the second target speed when a traveling situation of the vehicle differs from the specific traveling situation.

A tractor has a base for supporting a motive power source, left and right driven wheels, and left and right transmissions for the respective left and right wheels; a handle structure coupled to the base for grasping by an operator from behind the tractor; a drive system for driving each of the left and right transmissions with motive power from the motive power source; wherein the left and right transmissions are hydrostatic transmissions, further having a speed regulator control lever on each transmission that allows seamless control of the transmission from reverse speed through neutral into forward speed; and a transmission control coupled to each speed regulator control lever; further wherein there is a longitudinally disposed space between the left and right transmissions, and a power take off shaft is disposed in the space extending anteriorly and driven by the motive power source for powering a powered attachment arranged to be attached at the anterior of the tractor, further including a shaft extension of said power take off shaft extending posteriorly for driving a rear power take off for powering a rear mounted powered attachment.