Engine injection device and wall surface temperature control method thereof

The invention relates to an engine test injection device wall surface temperature control technology, in particular to an engine injection device and a wall surface temperature control method thereof. The engine injection device and the wall surface temperature control method thereof aims to solve the problem that in current engine test injection device wall surface temperature measurement, a temperature sensor is generally installed on an outer layer cooling jacket, and accurate measurement cannot be achieved. According to the technical scheme, the engine injection device comprises an inner-layer injection pipe, the outer-layer cooling jacket arranged on the inner-layer injection pipe in a sleeving mode and a temperature testing system arranged on the cooling jacket; the temperature testing system comprises a temperature measuring unit; the temperature measuring unit comprises a positive thermocouple wire, a negative thermocouple wire, a ceramic sleeve sleeving the positive thermocouple wire and the negative