Clutch connection/disconnection detection system for single-cylinder engine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorHiroshi Tanaka
Life of this patent
Estimating the term…
Abstract
To detect with high accuracy the connection/disconnection of a clutch intermediately provided between a crankshaft of a single-cylinder engine and a power transmission for transmitting the output of the crankshaft. The rotation variation coefficient of a crankshaft is detected by a rotation variation coefficient detection mechanism and a decision mechanism decides the connection/disconnection of a clutch by comparing the rotation variation coefficient detected by the rotation variation detection mechanism with a preliminarily determined threshold.
Claims22
A clutch connection/disconnection detection system for a single-cylinder engine, for detecting the connection/disconnection of a clutch intermediately provided between a crankshaft of said single-cylinder engine and a power transmission mechanism that transmits the output of said crankshaft comprising:
- a rotation variation coefficient detector that detects the rotation variation coefficient of said crankshaft, the rotation variation coefficient being a coefficient that changes with engine speed;
- and
- a decision mechanism that decides the connection/disconnection of said clutch by comparing said rotation variation coefficient detected by said rotation variation coefficient detector with a preliminarily determined threshold,
- wherein the rotation variation coefficient is a ratio of the time of a compression stroke and an exhaust stroke of the engine with respect to the time for two revolutions of the crankshaft.
A method for detecting clutch connection/disconnection for a single-cylinder engine, for detecting the connection/disconnection of a clutch intermediately provided between a crankshaft of said single-cylinder engine and a power transmission mechanism that transmits the output of said crankshaft, said method comprising the following steps:
- detecting a rotation variation coefficient of said crankshaft, the rotation variation coefficient being a coefficient that changes with engine speed;
- and
- deciding the connection/disconnection of said clutch by comparing said rotation variation coefficient of the crankshaft with a preliminarily determined threshold,
- wherein the rotation variation coefficient is a ratio of the time of a compression stroke and an exhaust stroke of the engine with respect to the time for two revolutions of the crankshaft.
A clutch connection/disconnection detection system for a single-cylinder engine for detecting the connection/disconnection of a clutch intermediately provided between a crankshaft of said single-cylinder engine and a power transmission mechanism that transmits the output of said crankshaft comprising:
- a rotation variation coefficient detector that detects the rotation variation coefficient of said crankshaft;
- and
- a decision mechanism that decides the connection/disconnection of said clutch by comparing said rotation variation coefficient detected by said rotation variation coefficient detector with a preliminarily determined threshold,
- wherein said decision mechanism decides that said clutch is connected when said rotation variation coefficient is below the preliminarily determined threshold and that said clutch is disconnected when said rotation variation coefficient is above the preliminarily determined threshold.
A method for detecting clutch connection/disconnection for a single-cylinder engine for detecting the connection/disconnection of a clutch intermediately provided between a crankshaft of said single-cylinder engine and a power transmission mechanism that transmits the output of said crankshaft, said method comprising the following steps:
- detecting a rotation variation coefficient of said crankshaft;
- and
- deciding the connection/disconnection of said clutch by comparing said rotation variation coefficient of the crankshaft with a preliminarily determined threshold,
- wherein the step of deciding decides that said clutch is connected when said rotation variation coefficient is below the preliminarily determined threshold and that said clutch is disconnected when said rotation variation coefficient is above the preliminarily determined threshold.
Dependencies are inferred from the claim text.