Power generation control device

Abstract

A generating controller of this invention performs minimum power generation via reducing engine torque fluctuations caused by load of power generation. A crank rotating angle using engine speed (Ne) and an upper stopping point as standard are detected based on pitch singles input from a crank rotating angle sensor (12). Functions of the engine speed (Ne) corresponding to the route having minimal friction force in whole circulation is used for pre-storing charge periods with different lengths. A charge period determining unit (18) compares the crank rotating angle and the charge period and inputs a charge control signal into an AND gate (104) when the present crank rotating angle is judged as the predetermined charge period. A duty determined by a regulated voltage control block (102) is set in a duty ratio setting unit (103) and is input to a switch circuit (7) when the AND gate (104) is opened.

Description

technical field [0001] The present invention relates to a power generation control device, and more particularly to a power generation control device that controls to supply an output current of an engine generator to a battery or a load only in a predetermined region where the frictional force of the engine is small. Background technique [0002] An engine-driven vehicle such as a motorcycle or a four-wheeled vehicle has a generator driven by the engine, and a battery for supplying electric power used in the vehicle is charged by an output current of the generator. In addition, generally, an on-vehicle generator is also used as an engine starting motor. [0003] It is known that the amount of power generated by an on-vehicle generator is variably controlled according to the load on the engine. For example, in the (Japanese) Special Publication No. 3-504407, a battery charging method is proposed. In the alternator-type battery charging method that stops the power generation...

AI Technical Summary

Problems solved by technology

On the other hand, in a four-cycle engine, the frictional force (the force acting in the opposite direction to the direction in which the piston moves in terms of the engine's function when the engine is operating) differs depending on each cycle (stroke), so even if the frictional force is not considered , it is difficult to reduce the torque variation caused by the frictional force difference between strokes only by controlling the power generation amount applied to the overall load state of the engine

[0008] In particular, when the engine is running in a low-speed region, the overall output torque is small, so even if the amount of power generation is limited, there will be torque fluctuations caused by differences in friction between strokes, which will cause engine damage. Cases where rotation lacks smoothness

That is, there are cases where the smoothness of engine rotation cannot be greatly improved even if the power generation amount is controlled only depending on the general load state.

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