公开(公告)号：US09386633B2

公开(公告)日：2016-07-05

申请号：US14189540

申请日：2014-02-25

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Ai Igarashi ,  Hiroyuki Hayashi ,  Tomohisa Terui ,  Kaoru Hisada

IPC: H05B1/02

CPC classification number: H05B1/0247 ,  H05B1/023

Abstract: A heater control method and apparatus for a gas sensor which can quickly activate a detection element while reducing load due to heating even when a higher power supply voltage is applied. A heater element is connected to a power supply whose voltage is higher than 16 V, and power is supplied under PWM control such that a temperature rise of the heater element follows a temperature rise curve obtained when a voltage of 12 V is applied to the heater element. Even though a higher voltage is applied, the temperature rise per unit time during the ON time of the PWM control is decreased. This is because the ON time per cycle is shortened by increasing the PWM frequency to 30 Hz or higher. Thus, the temperature rise per cycle is kept low, whereby the temperature rise per 0.1 second is rendered less than 25° C.

Abstract translation: 一种用于气体传感器的加热器控制方法和装置，其可以在即使施加更高的电源电压的同时减少由于加热引起的负载而能够快速地启动检测元件。 加热器元件连接到电压高于16V的电源，并且在PWM控制下供电，使得加热器元件的温度升高遵循当对电加热器施加12V的电压时获得的升温曲线 元件。 即使施加较高的电压，在PWM控制的导通时间期间，每单位时间的温度上升降低。 这是因为通过将PWM频率提高到30Hz以上来缩短每个周期的导通时间。 因此，每个循环的温度升高保持低，从而每0.1秒的温度升高小于25℃。