Throttle trigger actuated throttle position sensor and engine control module
AssigneeWalbro Corporation
InventorGeorge M. Pattullo
Life of this patent
Estimating the term…
Abstract
An engine kill switch and a throttle lever position sensor switch both remote from the engine and connected by a pair of wires to a microcontroller for controlling a spark initiated combustion of an air-fuel mixture in a cylinder of the engine. The switches may be received in the same housing and mounted in an operator handle housing of a hand held power tool.
Claims23
A control module for a spark ignited internal combustion engine with a throttle valve movable between idle and wide open throttle positions to control the supply of an air-fuel mixture into a cylinder of the engine by manually moving a trigger of a throttle lever remote from and operably connected to the throttle valve between idle and wide open throttle positions of the trigger lever, comprising:
- a microcontroller for controlling the spark initiating combustion of an air-fuel mixture in a cylinder of the engine;
- an engine kill switch remote from the engine and having a pair of contacts each connected by a separate one of a pair of wires to the microcontroller to signal the microcontroller to stop operation of the engine when the kill switch is manually actuated to a changed open or closed state of its pair of contacts;
- and
- a throttle lever position sensor switch remote from the throttle valve and engine with another pair of contacts each connected to a separate one of the same pair of wires connected to the microcontroller to signal the microcontroller when the trigger of the throttle lever is manually moved so that it is near or at its wide open throttle position.
An electric switch for a control module for a spark ignited internal combustion engine, comprising:
- an electrically insulative housing;
- a pair of spaced-apart electrically conductive connector terminals carried by the housing and configured to be accessible from the exterior of the housing for connecting a separate electric wire to a separate one of the terminals;
- a first pair of spaced-apart electrically conductive contacts carried by the housing and each connected to a separate one of the terminals;
- a second pair of spaced-apart electrically conductive contacts each connected to a separate one of the terminals;
- a first electrically conductive connector carried by the housing and movable between a first position spaced from at least one of the contacts of the first pair of contacts and a second position interconnecting the first pair of contacts;
- a second electrically conductive connector received in the housing and movable between a first position spaced from at least one of the contacts of the second pair of contacts and a second position interconnecting the second pair of contacts;
- and
- an actuator operably connected to the first connector, extending to an exterior portion of the housing and movable relative to the housing to move the first connector from its first position to its second position.
Dependencies are inferred from the claim text.