Speed control device for water jet propulsion boat
First Claim
1. A speed control device for a water jet propulsion boat that includes a power output request device and an engine adapted to operate in response to an operation of the power output request device by a rider, the speed control device comprising a speed setting operator configured to be operated by the rider, a speed setting operation detecting device configured to detect an operational condition of said speed setting operator, a speed mode changing device configured to change a speed mode based upon a detection result of said speed setting operation detecting device between a regular mode in which the engine operates in response to an operation of said drive operator by the rider and a speed set mode in which said water jet propulsion boat runs at a preset running speed or at a preset engine rotational speed, an engine rotational speed detecting device configured to detect a rotational speed of the engine, and a speed mode returning device configured to return the speed mode from the speed set mode to the regular mode when a detection value detected by said engine rotational speed detecting device in the speed set mode is zero or less than a predetermined value.
2 Assignments
0 Petitions
Accused Products
Abstract
A watercraft can have a controller that can change a speed mode between a speed set mode and a regular mode in response to an operation of an auto cruise switch. The controller can return the speed mode to a regular mode under various conditions. For example, but without limitation, when an engine rotational speed reaches “zero” or nearly “zero” (i.e., an engine operation stops or nearly stops) while the speed mode is in the speed set mode. The controller can be configured to follow the actuation of the cruise switch only when the switch is operated in the regular mode.
142 Citations
15 Claims
- 1. A speed control device for a water jet propulsion boat that includes a power output request device and an engine adapted to operate in response to an operation of the power output request device by a rider, the speed control device comprising a speed setting operator configured to be operated by the rider, a speed setting operation detecting device configured to detect an operational condition of said speed setting operator, a speed mode changing device configured to change a speed mode based upon a detection result of said speed setting operation detecting device between a regular mode in which the engine operates in response to an operation of said drive operator by the rider and a speed set mode in which said water jet propulsion boat runs at a preset running speed or at a preset engine rotational speed, an engine rotational speed detecting device configured to detect a rotational speed of the engine, and a speed mode returning device configured to return the speed mode from the speed set mode to the regular mode when a detection value detected by said engine rotational speed detecting device in the speed set mode is zero or less than a predetermined value.
- 12. A speed control device for a water jet propulsion boat that includes a power output request device and an engine adapted to operate in response to an operation of the power output request device by a rider, the speed control device comprising a speed setting operator configured to be operated by the rider, a speed setting operation detecting device configured to detect an operational condition of said speed setting operator, a speed mode changing device configured to change a speed mode based upon a detection result of said speed setting operation detecting device between a regular mode in which the engine operates in response to an operation of said drive operator by the rider and a speed set mode in which said water jet propulsion boat runs at a preset running speed or at a preset engine rotational speed, an engine rotational speed detecting device configured to detect a rotational speed of the engine, and a speed mode returning device configured to return the speed mode from the speed set mode to the regular mode when a detection value detected by said engine rotational speed detecting device in the speed set mode is zero or less than a predetermined value, further comprising return means for retuning said speed setting operator to an un-operational condition when said speed setting operator is released from the operation of the rider, and a timer for measuring an operation time of said speed setting operator operated by the rider, wherein the speed mode changing device is configured to change from the regular mode to the speed set mode only when the operation time of said speed setting operator measured by said timer exceeds a first preset time.
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14. A speed control device for a water jet propulsion boat that includes a power output request device and an engine adapted to operate in response to an operation of the power output request device by a rider, the speed control device comprising a speed setting operator configured to be operated by the rider, a speed setting operation detecting device configured to detect an operational condition of said speed setting operator, a speed mode changing device configured to change a speed mode based upon a detection result of said speed setting operation detecting device between a regular mode in which the engine operates in response to an operation of said drive operator by the rider and a speed set mode in which said water jet propulsion boat runs at a preset running speed or at a preset engine rotational speed, an engine rotational speed detecting device configured to detect a rotational speed of the engine, and a speed mode returning device configured to return the speed mode from the speed set mode to the regular mode when a detection value detected by said engine rotational speed detecting device in the speed set mode is zero or less than a predetermined value, wherein the speed control device is configured to prohibit a change to the speed set mode when a detection amount detected by said engine rotational speed detecting device exceeds a preset value.
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15. A speed control device for a water jet propulsion boat that includes a power output request device and an engine adapted to operate in response to an operation of the power output request device by a rider, the speed control device comprising a speed setting operator configured to be operated by the rider, a speed setting operation detecting device configured to detect an operational condition of said speed setting operator, a speed mode changing device configured to change a speed mode based upon a detection result of said speed setting operation detecting device between a regular mode in which the engine operates in response to an operation of said drive operator by the rider and a speed set mode in which said water jet propulsion boat runs at a preset running speed or at a preset engine rotational speed, an engine rotational speed detecting device configured to detect a rotational speed of the engine, and a speed mode returning device configured to return the speed mode from the speed set mode to the regular mode when a detection value detected by said engine rotational speed detecting device in the speed set mode is zero or less than a predetermined value, wherein the speed control device is configured to return the speed mode to the regular mode if a detection amount detected by said engine rotational speed detecting device exceeds a preset value.
Specification