公开(公告)号：US09822755B2

公开(公告)日：2017-11-21

申请号：US14652502

申请日：2013-11-18

Applicant: Bosch Corporation

Inventor： Yasuo Toyoshima ,  Shuichi Tsukahara ,  Tomohiro Nakamura ,  Yutaka Tanaka

IPC: F02P19/02

CPC classification number: F02P19/026 ,  F02P19/025 ,  F02P19/027

Abstract: Disclosed is a glow plug diagnosis method of being able to diagnose the aging or fault of a glow plug without being affected by cooling associated with air intake/exhaust or fuel injection, the method including: a step (S102) of energizing a glow plug 1 in a predetermined manner when a key switch 11 of a vehicle is turned on; and a step (S106) of measuring the resistance value of the glow plug 1 when the energization of the glow plug 1 is started, and the resistance value of the glow plug when the energization of the glow plug 1 is started and then a change in the resistance value is saturated, and of calculating a change in the resistance value over time as a resistance value gradient, in which it is determined that the glow plug 1 is normal when the resistance value gradient exceeds a predetermined first gradient reference value a, and it is determined that the glow plug 1 is faulty, and a warning lamp or the like is lighted when the resistance value gradient is less than a predetermined second gradient reference value b (S112 and S118).

公开(公告)号：US20160195056A1

公开(公告)日：2016-07-07

申请号：US14652502

申请日：2013-11-18

Applicant: BOSCH CORPORATION

Inventor： Yasuo Toyoshima ,  Shuichi Tsukahara ,  Tomohiro Nakamura ,  Yutaka Tanaka

IPC: F02P19/02

CPC classification number: F02P19/026 ,  F02P19/025 ,  F02P19/027

Abstract: Disclosed is a glow plug diagnosis method of being able to diagnose the aging or fault of a glow plug without being affected by cooling associated with air intake/exhaust or fuel injection, the method including: a step (S102) of energizing a glow plug 1 in a predetermined manner when a key switch 11 of a vehicle is turned on; and a step (S106) of measuring the resistance value of the glow plug 1 when the energization of the glow plug 1 is started, and the resistance value of the glow plug when the energization of the glow plug 1 is started and then a change in the resistance value is saturated, and of calculating a change in the resistance value over time as a resistance value gradient, in which it is determined that the glow plug 1 is normal when the resistance value gradient exceeds a predetermined first gradient reference value a, and it is determined that the glow plug 1 is faulty, and a warning lamp or the like is lighted when the resistance value gradient is less than a predetermined second gradient reference value b (S112 and S118).

Abstract translation: 公开了一种电热塞诊断方法，其能够在不受进气/排气或燃料喷射相关联的冷却的影响的情况下诊断电热塞的老化或故障，所述方法包括：对电热塞1进行通电的步骤（S102） 当车辆的钥匙开关11接通时，以预定的方式; 以及当启动电热塞1的通电时测量电热塞1的电阻值的步骤（S106），并且当电热塞1的通电开始时电热塞的电阻值，然后改变 电阻值饱和，并且计算电阻值随时间的变化作为电阻值梯度，其中当电阻值梯度超过预定的第一梯度参考值a时确定电热塞1正常，以及 确定电热塞1故障，并且当电阻值梯度小于预定的第二梯度基准值b时，警告灯等被点亮（S112和S118）。