| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heating device for an engine valve which can secure reliability while saving the number of wirings. <P>SOLUTION: The heating device 100A for the engine valve includes: a piezoelectric element 2, which is a power generator; a weight 3, which is an acting portion prompting the piezoelectric element 2 to generate power; and heating element 4, which is a heating portion generating heat depending on power supplied from the piezoelectric element 2. The heating device 100A for the engine valve is provided in the engine valve 1A having the piezoelectric element 2, the weight 3, an the heating element 4 provided in the combustion chamber of the internal combustion engine. The heating device 100A for the engine valve further includes a switch 5, which is a control portion for controlling the power supply from the piezoelectric element 2 to the heating element 4 depending on a temperature. The switch 5 is provided in the engine valve 1A, making the piezoelectric element 2 and the heating element 4 electrically contactless when the temperature is higher than the prescribed one. <P>COPYRIGHT: (C)2013,JPO&INPIT |
