In emerging markets such as China, India and Brazil, the demand for low-cost two-wheeled and three-wheeled vehicles is increasing. These small engines, especially the vaporization two-stroke design, have become the mainstream of small engines in Asia, but they are also the main source of air pollution. A three-wheeled taxi with a two-stroke engine emits harmful gases, which is equivalent to the sum of the gases emitted by about 50 modern cars.
Governments around the world are enforcing strict laws and regulations, requiring motorcycle and outdoor equipment manufacturers to design small engines that are ignited and cleaner. Motorcycle emerging markets are using emission standards similar to Euro 3. The United States Environmental Protection Agency (EPA) has issued strict emission regulations for small engines. According to the Outdoor Power Grid Equipment Industry Association, when the third stage standard of EPA is fully realized in the United States in 2065,438+05, it is estimated that compared with 65,438+0997, it will come from 95% of harmful emissions from small gasoline engines.
At the same time, in the face of world emission regulations and rising gasoline prices, the small engine market is shifting from mechanical carburetor system to cleaner and more efficient electronic control and electronic fuel injection (EFI) system. In order to respond to the global requirements for these eco-friendly designs, Freescale has combined highly integrated analog devices with 16 microcontroller (MCU) to provide an economical and efficient platform solution, which has become an ideal choice for small engine control.
This platform consists of MCZ338 12 (used to control fuel and EFI edm and electronic fuel injection system and optimize advanced analog integrated circuits) and Freescale S 12 microcontroller (MCU). This comprehensive small engine control platform is helpful to reduce harmful gases, reduce system complexity, reduce material use and manufacturing costs, and speed up the market. The target applications of Freescale small engine control include small engine two-stroke or four-stroke engines for motorcycles, mopeds, scooters and three-wheeled taxis. This platform is an ideal choice for the design of small engines for lawn mowers, gardening tractors, edgers, milling machines, side chain saws, key snow removers, defoliation cleaners, cultivators, generators, external motors and many other outdoor power equipment.
There is a growing demand for smaller engines that are more environmentally friendly and cleaner.
For small engine manufacturers, in order to meet the increasingly stringent emission regulations, the most practical methods such as electronic ignition, electronic carburetor and electronic control of the ultimate EFI engine are mandatory. Compared with carburetor system, the implementation of EFI system on small engines can reduce the emissions of carbon dioxide, hydrocarbons and nitrogen oxides by up to 65%, 35% and 35% respectively. At the same time, the installation of a small EFI engine has increased horsepower and increased the mileage per unit gasoline.
Widely used in advanced electronic control, highly integrated requirements and economical components of small engines. Freescale's new MCZ338 12 analog integrated circuit represents a market breakthrough technology. This device combines stabilizer, injector drive and ignition pre-drive, relay and lamp drive, watchdog timer and reset generator, and the control of all these small engines has been optimized. This excellent integration, supported by SMARTMOS technology, has reduced most 12 independent components for engine manufacturers by Freescale, simplified the circuit board area for engine manufacturers, and helped our customers improve the quality and reliability of their products. Facilitate a quick list of reference designs
Freescale provides an integrated system solution with reference to hardware/software design functions to assist the small engine market to shift from mechanical/electronic control system-based carburetor and fuel injection, thus accelerating the development process. The reference design of Freescale MCZ338 12 allows the developer S 12P microcontroller to evaluate the dual-chip solution based on MCZ38 12 and simulate the complete electronic control unit (ECU) of small engine. Freescale provides small engine design by optimizing software device drivers and engine control software. Reference design enables test engineers and ECU software and hardware designers to work in parallel, simplifying the development process and shortening the time to market.
Powerful MCU support
S 12/S 12X series MCU is widely used in automotive electronics market 16 architecture. MCZ338 12 IC and S 12P single chip microcomputer provide an ideal combination for small engine control design. S 12P provides 16-bit MCU, and supports the performance advantages, low power consumption, electromagnetic compatibility (EMC) and code size efficiency of 8-bit MCU at the same time. Extensible S 12P series provides many cost-effective options, and provides a smooth migration path for accessing powerful S 12XS series and S 12XE devices by improving performance XGATE technology. This compatibility makes developers' requirements for flash memory and performance increase with the improvement of their small engine settings.
Characteristics of MCZ338 12 Small Engine Control Circuit
1 injector low-side drive (current limit is-4.0 A typical)
Should the relay, pump, or Article 2 thermal injection low-end driver (current limit is-4.0 A typical).
It should be driven at the low end of lamp A (the current limit is-1.5 A typical).
1 ignition pre-drive (with independent high-end and low-end outputs)