| 摘要 |
A ram air duct directed to a vehicle's windshield receives ram air from behind a vehicle's engine coolant radiator which air is rammed through the radiator to heat the air and into the ram air duct by motion of the vehicle causing a heated air curtain over the windshield. During use at slow speeds, a fan may assist air movement from the radiator into the ram air duct. Supplemental heat may be obtained from electric heaters or the engine exhaust manifolds or both. To reduce vehicle drag due to its trailing vacuum and to the turbulence it causes, an air-collecting scoop is provided at the top of the windshield to receive air of the curtain as it leaves the windshield. The collected air is then ducted to the rear of the vehicle and exhausted into the trailing vacuum to reduce vehicle drag. |
