197results about How to "Improve energy recovery efficiency" patented technology

Disclosed is a waste heat utilizing device for an internal combustion engine (2), which comprises a cooling water circuit (4) having a radiator (12) for cooling the cooling water with the draft of ambient air, a Rankine cycle (6) having a first condenser (24) for condensing a cooling medium, and a refrigerating cycle (8) having a second condenser (36) for condensing the cooling medium.The first and second condensers (24 and 36) are water-cooled heat exchangers, and include a water circuit (44) having an air-cooled heat exchanger (46) for cooling the water having passed the first and second condensers (24 and 36), with the draft of the ambient air, and a heat-exchanging unit (53) composed of the air-cooled heat exchanger (46) and the radiator (12).

The invention relates to a hybrid power system with multiple power sources and multiple levels of speed ratios and a control method of the hybrid power system. The hybrid power system comprises an engine, a bidirectional controllable overrun clutch, a first motor, a second motor, a multi-speed transmission and a battery pack. One end of the bidirectional controllable overrun clutch is connected with an output shaft of the engine. The other end of the bidirectional controllable overrun clutch is connected with an output shaft of the first motor. A driving part of the multi-speed transmission is connected with the bidirectional controllable overrun clutch. A driven part of the multi-speed transmission is connected with an output shaft of the second motor. The battery pack supplies power to the first motor and the second motor. By means of switching of the modes of the bidirectional controllable overrun clutch and switching of gears of the multi-speed transmission, the multiple driving and energy recovery modes which the multiple power sources can be partially or overall involved in is realized. According to the hybrid power system, control is simplified, the structure is compact, sliding friction energy loss caused by the clutch is avoided, the efficiency of a whole vehicle is improved, the gear ratio of the system lowers the requirement for the performance of the first motor, the fuel economy of the engine is improved, and the energy-saving effect is enhanced.

The invention relates to the field of an electric automobile and particularly relates to a double-clutching two-gear speed transforming transmission and a double-clutching method of the speed transforming transmission. The double-clutching two-gear speed transforming transmission comprises a box body, wherein the box body is internally provided with an input shaft, a first driving gear sleeved on the input shaft, an output shaft and a second driven gear sleeved on the output shaft; the input shaft is connected with the output shaft through a first clutch; the double-clutching two-gear speed transforming transmission is further provided with a first middle shaft, a first driven gear sleeved on the first middle shaft, a second middle shaft and a second driven gear sleeved on the second middle shaft; the first middle shaft is connected with the second middle shaft through a second clutch; and the first driving gear is engaged with the first driven gear and the second driving gear is engaged with the second driven gear. According to the double-clutching method, the requirements of an electric state and a power generation state of a motor on the change of a rotary-speed torque are considered, so that the motor can maintain efficient and stable working states when operating at the electric state and the power generation state.