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Preparing for the 'small gangster' Suzuki soft 'hybrid' power system

by:Yisheng      2021-06-01

  【Quanzhou Yisheng Machinery Co., Ltd. Technology Channel】On April 16, 2014, Suzuki unveiled its weak hybrid system at its automotive technical briefing. Suzuki's weak hybrid power system consists of a combination of lithium-ion batteries and a belt-driven Integrated Starter Generator (hereinafter referred to as ISG). Let's take a look at the special features of this system.

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● Introduction to Suzuki's weak hybrid system

   This set of weak hybrid system is subordinate to Suzuki's current promotion called 'ENE- Practical research and development project of CHARGE' deceleration energy regeneration system. The project mainly improves the braking energy recovery system currently on the market from two aspects: first, the vehicle generates electricity through the alternator when decelerating, and the electricity is stored in the lithium battery or directly used to drive the electrical equipment in the vehicle; Second, when the vehicle is accelerating, it drives the engine in turn to improve fuel efficiency.

  The ISG used in the Suzuki soft hybrid power system integrates the advantages of an alternator and an electric motor, in order to make the ISG connect the two sides V when driving the engine crankshaft or the crankshaft driving the ISG motor The belt does not slip, and Suzuki has added a pendulum belt adjuster.

   Suzuki officially stated that the maximum power output of this soft hybrid system will be less than 2kW. Compared with the original ENE-CHARGE system, its power generation capacity will be increased. 30% of the electricity generated will be stored in a lithium battery and used as a starter to drive the engine to improve fuel efficiency. At present, its fuel efficiency improvement effect has not been announced.

● Introduction to ISG Motor

  ISG system can be used in vehicles powered by traditional engines. A typical hybrid vehicle uses a 14 kW electric induction motor or ISG between the engine and the transmission.

  ISG can play the role of a traditional alternator. When the vehicle is running, it will generate electricity. The generated electricity can be used to support the electrical equipment in the car and can be stored in the battery. . ISG can also convert vehicle braking energy into electrical energy, so-called regenerative braking. The generated electrical energy charges the battery, thereby reducing fuel consumption. ISG is a three-phase AC motor. When the vehicle speed is slow, the ISG acts as an electric motor to provide power and torque to the vehicle.

  ISG can be installed outside the engine and connected to the crankshaft through a drive belt. This design is called BAS. BAS can be used as a starter for an engine, and it can also be used as a generator driven by the engine.

  BAS and ISG use the same working principle to start the engine. When current flows through the stator windings, a magnetic field is generated in the rotor, which causes the rotor to rotate, thereby turning the crankshaft and starting the engine. The same principle is used as an auxiliary starter when the engine is running.

   In hybrid vehicles, the BAS is driven by the engine through the belt, and the BAS can be arranged between the engine and the gearbox (this arrangement is the most common, like the Prius Using this arrangement), multiple BAS can also be arranged in the gearbox. This arrangement makes the switching between electric and non-electric modes faster.

   In view of the 2KW output power, Suzuki’s ISG motor is undoubtedly aimed at small cars. The supplier of this ISG motor is currently unknown, although the technology has been It’s a good idea, but because the cost of components is still relatively high, there are still many problems that need to be resolved in order to reduce costs.

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