Denso 'low-cost' fuel injection system
For small capacity motorcycles with fewer components than conventional fuel injection systems -- ideal for emerging markets -- and it's called DIET-F1Japanese global automotive supplier Denso has developed a new electronic fuel injection system for small motorcycles called DIET-FI – an acronym for ‘Denso Intelligent Economical Technology-Fuel Injection’ – that aims to satisfy a growing demand for fitment on smaller motorised bikes in emerging markets like China.
According to Denso, DIET-FI is the world's first fuel injection system that doesn't use a throttle position sensor or engine temperature sensor. Instead, it uses newly developed control technologies that ensure the same fuel economy and environmental performance as conventional fuel injection systems, thus cutting costs.
DIET-FI has five fewer components than conventional systems, and is without a throttle position sensor, intake air temperature sensor, engine temperature sensor and ISC idle speed control step motor. ‘Compensation’ technologies include a temperature estimation control that integrates a thermistor into an electronic control unit, and a fuel metering control to determine acceleration/deceleration using an intake air pipe pressure sensor.
Denso is headquartered in Kariya, Japan, and the company has more than 200 subsidiaries and affiliates in 38 countries and regions (including Japan) and employs nearly 140,000 people.
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