Kawasaki Jukogyo Kabushiki Kaisha

Seiji Azuma

Shohei Terai

Tatsuya Hirokami

Kengo Ueda

Yoshimoto Matsuda

Daisuke Kawai

Takashi Okashiro

Atsuya Yoshida

Koji Nishida

A ground speed detection device for a vehicle includes a wheel speed sensor configured to detect a rotational speed of a wheel, a second storage section having stored a radius of the wheel corresponding to a bank angle, and a ground speed calculator configured to calculate a ground speed during cornering. The ground speed calculator extracts the radius of the wheel corresponding to a bank angle detected by a bank angle detection device, from the second storage section, and calculates the ground speed during cornering from the extracted radius of the wheel and the rotational speed of the wheel detected by the wheel speed sensor.

Ground speed detection device for vehicle

A wheelie determining device comprises a lift-off start determiner section which determines whether or not a lift-off of a front wheel from a ground surface has started, based on a traveling state value indicating a traveling state of a vehicle and an operation value indicating a rider's driving operation.

Wheelie determining device and wheelie determining method

An engine power suppressing device includes a controller which controls an operation of a power changing element which changes engine power for driving a vehicle; and an environment sensor which detects an environment parameter indicating an environment in which the vehicle is used, wherein the controller determines whether or not a power suppressing condition in which a vehicle state is a state in which the engine power is to be suppressed, is met, wherein in a case where the controller determines that the power suppressing condition is met, the controller sets a suppressing value for the power changing element to suppress the engine power, and compensates the suppressing value based on the environment parameter detected by the environment sensor.

Engine power suppressing device

A bank angle detection device for a motorcycle includes a bank angle estimator configured to estimate a moving body bank angle &#x3b8;b and a correcting section configured to estimate a vehicle body bank angle &#x3b8;f. The bank angle estimator estimates the moving body bank angle &#x3b8;b that is a gradient of a moving body axial line A, on the basis of a balance state where a centrifugal force CF acting on a moving body and a gravitational force GF acting on the moving body during cornering are in balance with each other. The correcting section corrects the moving body bank angle &#x3b8;b on the basis of an inertia force about a longitudinal axis acting on a vehicle body, so as to estimate the vehicle body bank angle &#x3b8;f that is a gradient of a center of gravity G of the vehicle body with respect to a vertical line.

Bank angle detection device for vehicle

An output control system incorporated in a vehicle including a clutch device which shifts a drive system from a no-load state to a connected state, comprises an upper limit setting section which sets an upper limit value of an output of the drive source while the output control system is performing a starting control; and a state determiner section which determines a state of the drive system while the output control system is performing a starting control, the upper limit setting section sets the upper limit value to a first upper limit value, while the state determiner section is determining that the drive system is in the no-load state, and the upper limit setting section sets the upper limit value to a second upper limit value larger than the first upper limit value, when the state determiner section determines that the connected state of the drive system is initiated.

Output control system

A straddle-type vehicle comprises a front wheel and a rear wheel, an engine disposed between the front wheel and the rear wheel, an air cleaner box disposed above the engine, and a vehicle body behavior sensor provided on a periphery of the air cleaner box and located above a bottom wall surface of the air cleaner box.

Straddle-type vehicle

An output control system incorporated in a vehicle including a clutch device comprises an upper limit setting section which sets an upper limit value of an output of the drive source to a starting control upper limit value when the output control system is performing a starting control; and a wheelie determiner section which determines whether or not a wheelie is occurring in the vehicle when the output control system is performing the starting control, wherein when the wheelie determiner section determines that the wheelie is occurring, the output control system performs a wheelie suppressing control for suppressing the output of the drive source while maintaining the starting control in such a manner that the output becomes less when the wheelie determiner section determines that the wheelie is occurring than before the wheelie determiner section determines that the wheelie is occurring.

A vehicle comprises: a control device mounted to a vehicle body; an additional device removably mountable to the vehicle body; and an existing device mounted to the vehicle body and electrically connected to the control device, the existing device being different from the additional device, wherein the control device includes: an additional control section which performs a control to realize an additional function obtained by use of the additional device, when the control device determines that the additional device is connected to the control device; and a change control section which performs a control in such a manner that an existing function obtained by use of the existing device is changeable from the existing function in a state in which the additional device is not connected to the control device, when the control device determines that the additional device is connected to the control device.

Vehicle and control method of vehicle

A wheelie suppressing device comprises a wheelie determiner section which detects a wheelie state; and a wheelie suppressing section which performs a wheelie suppressing control for suppressing an engine output when the wheelie determiner section has detected the wheelie state, wherein the wheelie suppressing control includes a first suppressing control for suppressing the engine output while performing fuel feeding and an ignition operation, and a second suppressing control for suppressing the engine output by performing the fuel feeding or the ignition operation at a reduced rate.

Wheelie suppressing device

A four-cycle engine of the present invention comprises a gas exhaust outlet that is formed on an upper region of a crankcase to exhaust a gas from the interior of the crankcase to outside; and a rotatable shaft disposed in close proximity to the gas exhaust outlet in the interior of the crankcase. The gas exhaust outlet is configured to open toward a region in the interior of the crankcase, the region extending from a line segment connecting the gas exhaust outlet to a rotational center axis of the shaft, in a rotational direction of the shaft at a cross point where the line segment crosses an outer peripheral surface of the shaft.

Growing community of inventors

Hyogo, Japan

Seiji Azuma