A starter battery system for an air cooled engine rated at less than 50 horsepower. The system includes four lithium iron phosphate cells and a charging circuit configured to be powered by rotation of an air cooled engine. A voltage developed by the charging circuit is applied to the four lithium iron phosphate cells without battery management circuitry provided between the charging circuitry and the four lithium iron phosphate cells.

An engine which includes at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having at least one cell, and a charging system configured to be powered by motion of at least one component of the engine. The charging system is configured to continuously apply a voltage potential to the at least one cell while the engine is in a running condition.

An engine including at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having four lithium iron phosphate cells, and a charging system configured to be powered by the engine. The charging system is electrically coupled to the lithium-ion battery and configured to charge the lithium-ion battery and no battery management circuitry is provided between the charging system and the lithium-ion battery.

A present invention is a charge coil unit, comprising an inductor that generates an induced current based on power of a source of power, a capacitor connected in series to the inductor, and a circuit unit provided to be able to charge the capacitor by the induced current generated in the inductor, thereby, the output voltage of the charge coil unit can be stabilized.

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.

A control panel, a self-propelled switch apparatus, and a power device (13). The control panel comprises a pushing rod (1) connected to a machine body and a panel assembly (2) reciprocatingly sliding on the pushing rod. The control panel further comprises locking assembly (41, 42) connected to the panel assembly. The locking assembly (41, 42) are adapted to lock the panel assembly on the pushing rod and unlock the control panel and the pushing rod. The control panel further comprises a self-propelled switch (134), and when the self-propelled switch (134) is triggered, a device in which the control panel is disposed can be switched from a manual-power driving mode to a self-propelled driving mode. By means of the solution, a garden tool can walk in a self-propelled manner, and can also be pushed to walk.

Mowing systems include a mower and a remote control unit such as a handheld unit, between which is provided 1- or 2-way communications. Components and features are included in the mower, the remote control unit, or both to enhance the safety, functionality, or user experience of the system's user/operator. One aspect relates to an enable switch on the remote control unit that requires activation within a specified time before activating a drive system or PTO unit. Another aspect relates to sharing diagnostic information between the mower and remote control unit and emitting user-detectable warnings in response to the shared information. Another aspect relates to reducing a danger level of the system, e.g. disabling the PTO unit or slowing a drive speed transform function, when a proximity between the mower and the remote control unit is too small. Another aspect relates to controlling operation of the mower based on tilt angles of both the mower and the remote control unit.

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.

An internal combustion engine includes an engine block, a blower housing configured to direct cooling air to the engine block, an electric starting system, and a crankshaft configured to rotate about a crankshaft axis. The electric starting system includes an electric motor and an energy storage device located within the blower housing. The energy storage device is electrically coupled to the electric motor to power the electric motor. When the starter motor is activated, the electric starting system rotates the crankshaft to rotate the engine for starting.

A lawnmower comprising: a body; a cutting element coupled with the body; a motor configured to drive the cutting element; a sensor comprising an accelerometer configured to detect an angular displacement of the lawnmower with respect to a vertical axis and a wobble of the cutting element with respect to a horizontal plane; and a processor configured to: compare the detected angular displacement against a tilt threshold value; compare the detected wobble against a wobble threshold value; and control an operational speed of the cutting element when the angular displacement exceeds the tilt threshold value or when the wobble exceeds the wobble threshold value.

A starter system for a lawn mower includes a handle tube and a rope guide. The rope guide includes a rod member with three bends defining four rod segments. A first rod segment extends linearly through opposite openings in the tube, a second rod segment is curved at a diameter approximating a tube surface diameter, a third rod segment extends longitudinally along the tube, and a fourth segment extends to a distal coil. Two points of direct contact between the rod member and the tube outer surface include a first contact point on the second rod segment adjacent a tube opening indentation and a second contact point on the third rod segment near the third bend. The rod segments are configured such that tightening of a nut member dynamically deflects the second and third rod segments to increase a gap with the tube outer surface.

User interfaces for power tools are provided. A user interface includes a first actuator moveable between a non-actuated position and an actuated position, the first actuator including a first user actuation member and a latch assembly, wherein movement of the user actuation member causes movement of the latch assembly. The user interface further includes a second actuator moveable between a non-actuated position and an actuated position, the second actuator including a second user actuation member and a receiver. Movement of the first actuator and the second actuator to the respective actuated positions causes receipt of the latch assembly by the receiver.