The reaction force output device includes a drive source configured to output power to an operation portion in a direction opposite to an operating direction thereof; and a clutch mechanism interposed between the operation portion and the drive source and configured to connect and disconnect transmission of the power to the operation portion, wherein the clutch mechanism includes a first rotating body connected to the drive source side and to which the power of the drive source is transmitted, a second rotating body connected to the operation portion side, disposed coaxially with the first rotating body and configured to be relatively rotatable with respect to the first rotating body, a clutch lever rotatably supported by the first rotating body, and a plurality of engagement portions disposed at the second rotating body in a circumferential direction thereof and engaged with the clutch lever.

A shovel enabled to set an engine revolution speed to revolution speeds including a revolution speed for a running operation and a revolution speed for an idling running operation that is lower than the revolution speed for the running operation includes an engine provided as a driving source of the shovel, an operating part configured to be driven by a driving force of the engine, an operation component configured to operate the operating part, a detecting device configured to detect a position of a movable portion of an operator and a position of the operation component, an operation determining part configured to determine a positional relationship between the movable portion and the operation component, and a control part configured to set the engine revolution speed of the engine based on the positional relationship between the movable portion and the operation component that is determined by the operation determining part.

Disclosed is a throttle quadrant arrangement utilizing a throttle lever mechanically connected to three Rotary Variable Differential Transformers (RVDTs). The signals from the RVDTs are monitored by a process where the processing component. More specifically, RVDT outputs are monitored by the engine control system to determine if they are outside a predetermined range of operability. If an RVDT is not operable, the engine control system establishes a thrust output using the signal from one of the functional two. If only one or none are within the range, the system moves on to a default mode.

Disclosed is a throttle quadrant arrangement utilizing a throttle lever mechanically connected to three Rotary Variable Differential Transformers (RVDTs). The signals from the RVDTs are monitored by a process where the processing component. More specifically, RVDT outputs are monitored by the engine control system to determine if they are outside a predetermined range of operability. If an RVDT is not operable, the engine control system establishes a thrust output using the signal from one of the functional two. If only one or none are within the range, the system moves on to a default mode.

A system and method are provided for coordinating the installation and removal a motor control center subunit with the power connection and interruption thereof. A system of interlocks and indicators causes an operator to install a motor control center subunit into a motor control center, and connect supply and control power thereto, in a particular order. Embodiments of the invention may prevent actuation of line contacts of the bucket, and shield the line contacts, until the bucket is fully installed in the motor control center. Other embodiments also prevent circuit breaker closure until the line contacts are engaged with a bus of the motor control center.

A system and method are provided for coordinating the installation and removal a motor control center subunit with the power connection and interruption thereof. A system of interlocks and indicators causes an operator to install a motor control center subunit into a motor control center, and connect supply and control power thereto, in a particular order. Embodiments of the invention may prevent actuation of line contacts of the bucket, and shield the line contacts, until the bucket is fully installed in the motor control center. Other embodiments also prevent circuit breaker closure until the line contacts are engaged with a bus of the motor control center.

A position sensor according to the present invention includes: a magnet configured to move together with a moving body and generate a first magnetic flux along a specific movement direction of the moving body and a second magnetic flux along the opposite direction to the specific movement direction of the moving body; and a sensor configured to detect the direction of the first magnetic flux and the direction of the second magnetic flux. The magnet is configured by at least one magnet having at least two pairs of magnetic poles to be paired formed thereon.

A throttle grip device controls an engine of a vehicle in accordance with a rotation angle of a throttle grip detected by a rotation angle detection unit, a base end portion of the throttle grip has a first flange region portion and a second flange region portion formed over a predetermined range in a circumferential direction, the first flange region portion and the second flange region portion are respectively formed at positions offset by a predetermined dimension with respect to an axial direction of the throttle grip, and the first support portion and the second support portion are formed so as to protrude at positions corresponding to the first flange region portion and the second flange region portion, respectively.

A throttle assembly for an engine includes a remote control throttle lever, a manual throttle control lever, and a throttle return spring. The remote control throttle lever is configured to operate the throttle assembly and the engine based on a force received from an external device. The manual throttle control lever is configured to operate the throttle assembly and the engine based on a force received from a user input at an input portion of the manual throttle control lever. An abutment portion of the manual throttle control lever is spaced from the input portion of the manual throttle control lever and configured to abut the remote control throttle lever. The throttle return spring is configured to bias the remote control throttle lever against the abutment portion of the manual throttle control lever in an opposite direction of the force received from the external device.

A throttle assembly for an engine includes a remote control throttle lever, a manual throttle control lever, and a throttle return spring. The remote control throttle lever is configured to operate the throttle assembly and the engine based on a force received from an external device. The manual throttle control lever is configured to operate the throttle assembly and the engine based on a force received from a user input at an input portion of the manual throttle control lever. An abutment portion of the manual throttle control lever is spaced from the input portion of the manual throttle control lever and configured to abut the remote control throttle lever. The throttle return spring is configured to bias the remote control throttle lever against the abutment portion of the manual throttle control lever in an opposite direction of the force received from the external device.