Toyota Motor Corp fully renewed the control software development process for its hybrid systems, starting from the new Prius, which was released in December 2015.
The company announced this at User Conference 2016, which the Japanese subsidiary of dSpace GmbH had June 3, 2016, in Tokyo.
To increase the fuel efficiency from 32.4km/L to 40.8km/L under the JC08 test mode for the new Prius, more advanced control was required. Also, because the new Prius uses both nickel-metal-hydride (NiMH) and lithium-ion (Li-ion) batteries and a four-wheel-drive is available, a variety of controls were required for the vehicle. Therefore, Toyota fully renewed the control software and introduced MBD (model-based development) to the development process.
Specifically, the company streamlined the development process by employing dSpace's Target Link automatic code generation tool, BTC Embedded Systems AG's EmbeddedTester and EmbeddedValidator software verification tools and PTC Inc's Integrity configuration management tool.
In regard to the control software, Toyota simplified its structure by reducing the number of processes, the number of combinations of modes, etc in the aims of quickly adding new functions while keeping product quality. As a result, the complexity of the software was halved, the company said. Moreover, the company developed the entire software in house this time though it formerly entrusted the development of part of it to suppliers.