Nonadjustable outboard motor throttle linkage
First Claim
Patent Images
1. A throttle linkage for an outboard motor comprising:
- an input end constructed to receive an operator throttle command initiated in a watercraft;
an output end constructed to be directly connected to a throttle assembly of an engine disposed in an outboard motor;
the throttle assembly having a throttle plate and a mechanical deadband between the output end and the throttle plate; and
a lever assembly having a plurality of lever arms disposed between the input end and the output end, each lever arm and the lever assembly being free of any form of adjustment.
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Accused Products
Abstract
A throttle linkage for use with an internal combustion engine is disclosed which connects a throttle actuator to a throttle assembly. The throttle linkage is nonadjustable and interacts with a plurality of throttle stops integrally formed with an engine block. Such an arrangement prevents tampering in advanced two-stroke engines and ensures emission output at a level well below that allowed.
31 Citations
29 Claims
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1. A throttle linkage for an outboard motor comprising:
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an input end constructed to receive an operator throttle command initiated in a watercraft; an output end constructed to be directly connected to a throttle assembly of an engine disposed in an outboard motor; the throttle assembly having a throttle plate and a mechanical deadband between the output end and the throttle plate; and a lever assembly having a plurality of lever arms disposed between the input end and the output end, each lever arm and the lever assembly being free of any form of adjustment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A throttle linkage for an engine comprising:
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a first link rotatably attached to an engine and having a permanently fixed range of rotation; an input arm integrally formed with the first link and connected to a throttle cable; a second link having a permanently fixed range of rotation and engageable by an output arm of the first link; a third link connected to an output arm of the second link and connected to a throttle assembly; and the throttle assembly having an actuator connected between the third link and a throttle plate wherein the actuator disengages the throttle plate from the third link during a portion of the permanently fixed range of rotation of the second link. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An internal combustion engine comprising:
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an engine block having at least one cylinder formed therein; a throttle stop extending from the engine block; a throttle assembly having an opening therethrough in fluid communication with the at least one cylinder; a throttle linkage connected to the throttle assembly and constructed to receive a throttle command, the throttle linkage having at least one link having an index integrally formed therewith and constructed to directly engage the at least one throttle stop; and a throttle plate rotalably positioned in the opening of the throttle assembly, the throttle plate disengaged from the throttle linkage during a portion of a range of movement of the throttle linkage, wherein the throttle linkage is free of any form of adjustment. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A method of manufacturing an engine comprising the steps of:
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forming a throttle link having a tab; forming an engine block with at least two throttle bosses; and attaching the throttle link to the engine with a permanently fixed range of movement and with the tab rotatably positioned between the at least two throttle bosses so that the tab engages one throttle boss when a throttle plate is at an idle position and engages the other throttle boss when the throttle plate is at a wide open throttle position.
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Specification