Dual-motor hybrid engine extended range power system and driving method thereof

Abstract

The invention discloses a dual-motor hybrid engine extended range power system and a driving method thereof. An engine and a motor machine and a driving motor and an output piece are in transmission connection with one at least three-stage planetary line. The three-stage planetary line transmits and outputs a driving force, and when closing and releasing of a corresponding brake are selected to act on a planetary line transmission relationship, working modes, including double-speed driving of the driving motor, high-efficiency power supplement of the dual-motor, the engine drives a generator to generate electricity independently and simultaneously drives the motor to drive at double speed, the engine is driven at a high speed and a low speed independently at a larger speed ratio, the engine drives the generator and the driving motor to generate electricity by a high-power dual-motor, the engine is started quickly, neutral gear and the like are achieved. The power system is characterized in that a space occupied is small, the electricity supplementing efficiency is high, the engine is driven independently to be suitable for being used in cold areas, loss of power extended range is small, endurance mileage is long, operation reliability is high, cost is low and the like.

Description

technical field [0001] The invention belongs to a vehicle power system, and in particular relates to a range-extended hybrid power system and a multi-mode driving method. Background technique [0002] With the rapid development of electric vehicles, battery cost and cruising range have become contradictory issues restricting the development of electric vehicles. Especially in some cold weather conditions, the cruising range of electric vehicles decays rapidly. Moreover, the scarcity of charging piles is also prominent. Under such circumstances, the field of electric vehicles has proposed a clean energy range-extended pure electric vehicle solution. On the one hand, it can use the optimized battery power, on the one hand, it can solve the problems of mileage anxiety and charging pile anxiety, and at the same time, in severe cold weather Next, the engine can be used to drive the heat engine and the air conditioner hot air. However, although the range-extended pure electric ve...

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Problems solved by technology

However, although the range-extended pure electric vehicle has many advantages mentioned above, however, there is a problem of energy secondary conversion efficiency

At present, most of the markets on the market use engine + generator direct drive power generation, drive motor + fixed speed ratio reducer direct driv

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