Fuel ejection device and abnormity judgement method for the same

Abstract

A fuel injection device can accurately detect the state of the battery, urge the user to maintain the battery, and prevent engine abnormality and engine stop in advance. The fuel injection device includes a fuel injection module (1) with the function of reciprocating the plunger by energizing the solenoid coil (1a), sucking in fuel and then pressurizing injection; giving a drive signal to the fuel injection module (1) control unit (2); generator (3); and battery (5). In this fuel injection device, when the driving signal of the solenoid coil (1a) is turned on and a predetermined time has elapsed in the turned-on state, the battery voltage is detected by the battery voltage detection voltage circuit (16), and the battery voltage is used to detect the battery voltage. The state judging unit (8a) compares the battery voltage with a predetermined value to judge the state of the battery, and displays the judgment result on the battery state display lamp (18).

Description

technical field [0001] The present invention relates to a fuel injection device for an engine using a fuel injection module, and its abnormality judgment method. It is used, for example, in the fuel injection control of a two-wheeled vehicle engine, and the plunger is reciprocated by energizing the solenoid coil. , with the functions of inhaling fuel and pressurizing injection. Background technique [0002] In the electronically controlled fuel injection device in which the control unit calculates the fuel supply amount according to the engine speed and load, and provides a driving signal to the fuel injection valve, there is known a kind of using electromagnetic force to make the plunger reciprocate, suck fuel and then pressurize injection fuel injection module. This fuel injection module works in such a way that the solenoid coil is energized according to the drive signal given by the control unit, and the plunger pressurizes the fuel to inject it at a prescribed fuel pre...

AI Technical Summary

Problems solved by technology

[0009] If the battery is in a state of discharge and deterioration, the power necessary to drive the fuel injection module will not be obtained, and the amount of fuel supplied to the engine will be reduced, resulting in abnormal operating conditions of the engine

In addition, in the state of battery discharge and deterioration, sometimes the voltage of the battery decreases due to the drive of the fuel injection module, and the control unit that provides the drive signal to the fuel injection module will not work normally, and the engine cannot continue to run.

[0010] In the conventional fuel injection device disclosed in the above-mentioned patent document, there is a problem that the state of the battery cannot be accurately monitored because there is no device capable of properly judging the state of discharge and the state of deterioration of the battery.

Especially when used in small two-wheeled vehicles, due to the small power generation capacity of the generator and the small capacity of the battery, in order to avoid the above problems, it is necessary to strengthen the management of the battery, but it is difficult for ordinary users to carry out daily battery maintenance. manage

Images