Urea tank for SCR aftertreatment system, and tank cover thereof
AssigneesWeichai Power Co., Ltd., Weichai Power Emission Solutions Technology Co., Ltd.
InventorsRui Wang, Jia Yu
Life of this patent
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Abstract
A tank cover of a urea tank for an SCR aftertreatment system is provided with an air hole, a gas inlet hole, a gas discharge hole, a first constant pressure check valve and a second constant pressure check valve. The tank cover is mounted at a liquid injection port of a tank body of the urea tank. The air hole is provided in a portion of the tank cover corresponding to the liquid injection port. The gas inlet hole and the gas discharge hole are provided in the portion of the tank cover corresponding to the liquid injection port. An inlet of the first constant pressure check valve is butted with the air outlet hole. An inlet of the second constant pressure check valve is butted with the air inlet hole.
Claims10
A tank cover of a urea tank for SCR aftertreatment system, wherein the tank cover is mounted at a liquid injection port of a urea tank body of the urea tank, a ventilation hole is provided at a part of the tank cover corresponding to the liquid injection port, the ventilation hole is covered by a water-impermeable and air-permeable membrane,
- an air inlet hole and an air outlet hole are provided at the part of the tank cover corresponding to the liquid injection port, a first constant pressure check valve and a second constant pressure check valve are mounted on the tank cover,
- an inlet of the first constant pressure check valve is butted with the air outlet hole, and an outlet of the first constant pressure check valve is in communication with outside of the tank body,
- an inlet of the second constant pressure check valve is butted with the air inlet hole, and an outlet of the second constant pressure check valve is in communication with inside of the tank body.
Dependencies are inferred from the claim text.