1. A starter for a small engine, comprising:
a torque apply unit that applies a torque to a torque-accumulation spring arranged in a starter case;
a rotating member provided in the starter case to transmit the torque accumulated in the torque-accumulation spring to a crankshaft of the engine;
a driving pulley provided integrally with the crankshaft to be engaged with and disengaged from the rotating member; and
a rotation regulation unit that restrains the torque accumulated in the torque-accumulation spring from being transmitted to the crankshaft,
wherein the rotation regulation unit includes:
a regulation ratchet provided on a rotating body at an eccentric position thereof, the rotating body being linked with the crank shaft to rotate therewith; and
a pressing unit provided on an engine case to be engaged with the regulation ratchet and to regulate an operation of the regulation ratchet by a predetermined resilient force, and
wherein the regulation ratchet is disengaged from the pressing unit by the torque accumulated in the torque-accumulation spring when the accumulated torque exceeds the resilient force, so that the rotating body and the crankshaft are rotated to thereby start the engine.
2. The starter of claim 1,
wherein the rotating body is a fly-wheel of the engine.
3. The starter of claim 1,
wherein the rotating body is a cam gear provided in the engine between the crank shaft and an intake or exhaust valve.
4. A starter for a small engine, comprising:
a motor that applies a torque to a torque-accumulation spring arranged in an engine case;
a gear member that transmits the torque accumulated in the torque-accumulation spring to a crank shaft of the engine; and
a rotation regulation unit that restrains the torque accumulated in the torque-accumulation spring from being transmitted to the crankshaft,
wherein the rotation regulation unit includes:
a regulation ratchet provided on a rotating body at an eccentric position thereof, the rotating body being linked with the crank shaft to rotate therewith; and
a pressing unit provided on an engine case to be engaged with the regulation ratchet and to regulate an operation of the regulation ratchet by a predetermined resilient force, and
wherein the regulation ratchet is disengaged from the pressing unit by the torque-accumulated in the torque-accumulation spring when the accumulated torque exceeds the resilient force, so that the rotating body and the crankshaft are rotated to thereby start the engine.
5. The starter of claim 4,
wherein the rotating body is the gear member.
6. The starter of claim 4,
wherein the rotating body is a fly-wheel of the engine.
7. The starter of claim 4,
wherein the rotating body is a cam gear provided in the engine between the crank shaft and an intake or exhaust valve.
8. A starter for a small engine, comprising:
a lever unit that applies a torque to a torque-accumulation spring arranged in an engine case;
a rotating member that transmits the torque accumulated in the torque-accumulation spring to a crank shaft of the engine; and
a rotation regulation unit that restrains the torque accumulated in the torque-accumulation spring from being transmitted to the crankshaft,
wherein the rotation regulation unit includes:
a regulation ratchet provided on a rotating body at an eccentric position thereof, the rotating body being linked with the crank shaft to rotate therewith; and
a pressing unit provided on an engine case to be engaged with the regulation ratchet and to regulate an operation of the regulation ratchet by a predetermined resilient force, and
wherein the regulation ratchet is disengaged from the pressing unit by the torque accumulated in the torque-accumulation spring when the accumulated torque exceeds the resilient force, so that the rotating body and the crankshaft are rotated to thereby start the engine.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for operating a non-condensing boiler at maximum non-condensation efficiency, the method comprising the steps of:
sensing a temperature of exchange water introduced into a heat exchanger of the non-condensing boiler and a temperature of supply water discharged from the heat exchanger by means of sensors, transmitting the sensed temperatures to a controller, and calculating an average temperature from the temperature of exchange water and the temperature of supply water at the controller;
calculating a maximum concentration of CO2 from the calculated average temperature based on information indicating a relationship of a dew point temperature with a concentration of CO2 that is previously input into the controller;
calculating a ratio of excess air (\u03bb) from the maximum concentration of CO2 using a combustion equation chosen depending on a fuel used;
when the excess air ratio (\u03bb) is calculated, setting a control target value for the excess air ratio (\u03bb) from the calculated excess air ratio;
when the control target value for the excess air ratio (\u03bb) is set, calculating a target value of air flow suitable for a current consumption amount of the fuel from the set control target value; and
performing feedback control with respect to the air flow target value and a value input from an air flow sensor, and supplying a greater amount of air than the air flow target value.
2. The method according to claim 1, wherein the step of setting the control target value for the excess air ratio (\u03bb) comprises a step of determining whether or not the excess air ratio (\u03bb) calculated from the maximum concentration of CO2 is within a stable combustion region based on information about a relationship between the excess air ratio (\u03bb) that is previously input into the controller and carbon monoxide (CO).
3. The method according to claim 2, wherein, after it is determined whether or not the excess air ratio (\u03bb) calculated from the maximum concentration of CO2 is within the stable combustion region, when the excess air ratio (\u03bb) is within the stable combustion region, this excess air ratio is set to the control target value, and when the excess air ratio (\u03bb) is less than a lower limit of the stable combustion region, a minimum excess air ratio of the stable combustion region is set to the control target value.