Internal combustion engine with electric starting system
An engine including an engine block having a cylinder defining a front of the engine, a blower housing coupled to the engine block and defining a hot half and a cool half opposite the front half, a starter mount assembly coupled to the blower housing and positioned within the cool half, an electric starter motor retained by the starter mount assembly, and a battery mounted to the blower housing and positioned in the cool half. The battery is electrically coupled to the electric starter motor.
1. An engine, comprising:
a controller configured to:
control a current provided by a battery mounted in a blower housing of the engine to an electric starter motor mounted to the blower housing to cause the electric starter motor to rotate at a first speed,
sense a current draw of the electric starter motor,
continue operation of the electric starter motor at the first speed while the current draw is below a threshold value,
determine that the current draw has exceeded the threshold value, and
increase the speed of the electric starter motor to a second speed greater than the first speed in response to determining that the current draw has exceeded the threshold value.
2. The engine of claim 1 , wherein the controller maintains the first speed for at least four-hundred-fifty milliseconds.
3. The engine of claim 1 , wherein the controller is further configured to discontinue current provided from the battery to the electric starter motor in response to determining that a threshold engine speed has been reached.
4. The engine of claim 1 , wherein the controller uses pulse width modulation to power the electric starter motor.
5. The engine of claim 1 , wherein the controller increases the speed of the electric starter motor from the first speed to the second speed using a gradual speed increase.
6. The engine of claim 1 , wherein the controller controls selective charging of the battery.