| 摘要 |
First inner gas holes 134a and first outer gas holes 144a of a gas sensor are formed so that the following conditions are satisfied: a first-inner-hole count Nin ‰¥ 3, 0 < an inner/outer hole count ratio Nr ‰¤ 0.5, and 0 < an inner/outer hole-area ratio Ar ‰¤ 0.25, where the first-inner-hole count Nin represents the number of first inner gas holes 134a, a first-inner-hole average area Ain [mm 2 ] represents (the total opening area of the first inner gas holes 134a)/(the first-inner-hole count Nin), a first-outer-hole count Nout represents the number of the first outer gas holes 144a, a first-outer-hole average area Aout represents (the total opening area of the first outer gas holes 144a)/(the first-outer-hole count Nout), the inner/outer hole count ratio Nr represents the first-inner-hole count Nin/the first-outer-hole count Nout, and the inner/outer hole-area ratio Ar represents the first-inner-hole average area Ain/the first-outer-hole average area Aout. |
