TH47813A - Automatic choke control device - Google Patents

Abstract

DC60, when the engine speed is measured by the speedometer sensor 49 is equal to or greater than the speed set using the microcomputer 46, then the time the current is fed. With the PTC automatic choke heaters, the 42 is controlled by the pulse control of the transistor 47, and it is therefore not necessary to use an external resistor of the respective Renaissance for the voltage keypad. To the automatic choke heater Moreover, when such auto chokes have been applied to different engine characteristics, the open pulse width of the microcomputer 46 changes according to the corresponding characteristic. Of the engine It will be easy to deal with such a difference. When the engine speed is measured by the speedometer sensor 49 is equal to or greater than the speed that is set using the microcomputer 46, then the time the current is fed. With the PCT automatic choke heaters, the 42 is controlled by the pulse control of the transistor 47, and it is therefore not necessary to use the corresponding external resistor of the Renaissance to adjust the voltage keypad. To the automatic choke heater Moreover, when such auto chokes have been applied to different engine characteristics, the open pulse width of the microcomputer 46 changes according to the corresponding characteristic. Of the engine It will be easy to deal with such a difference.

Claims (1)

1. Automatic choke control device for controlling the passage of electricity from the battery. To the automatic choke heater Which includes an automatic choke heater used The battery is the electrical source, it heats the heat wax and then heats the wax. Expands to drive the sliding throttle valve to open and close the path. Fuel for carburettor engine mounting Which has the characteristics that A pulse-controlled path is provided to control the time at which the current is fed. With automatic choke heater when the engine rotational speed is greater than the Set engine rotation Such a pulse-controlled path includes a transistor to interrupt the pass. Current from the battery to the aforementioned automatic choke heaters, and A microcomputer for an open (on-pulse) input that has been modulated pulse width. To the base leg of the transistor The microcomputer modifies the opening pulse width according to the temperature. That can be measured from a temperature sensor for measuring the temperature of the engine, to control An open pulse to the base pin of the aforementioned transistor by means of the first duty ratio, during which the measured temperature is zero to the first temperature value, is controlled. An open pulse to the base leg of the transistor with a second duty ratio greater than the first active range ratio. When the above measured temperature is Greater than the second temperature value Which is greater than that first temperature value And modulating the The pulse width is open in such a way that compensation is made between the first temperature and the second temperature. With a slope