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Glossary
- ECU
- The engine control unit (ECU) is connected to several sensors and sending units on the engine and then automatically calculates the optimum amount of fuel to be injected into the combustion chamber. The benefit is smoother and faster acceleration, crisp throttle response, maximum fuel economy thus ensures quick and reliable starting regardless of the ouside temperature.
- Lambda Control
- On catalysed cars, an additional sensor is fitted to help maintain the air/fuel mixture at the predetermined, optimum level. This sensor is known as a Lambda sensor,
Closed loop is the description of the constant control system employed by the engine management system. When the management system receives its signal from the Lambda sensor, it will then adjust the air/fuel ratio, (if required), and then compare the new Lambda reading to pre set levels. The management system will continue this process, and so it is said to be in a loop, looking at the mixture, adjusting the mixture, looking at the mixture, adjusting the mixture, and so on.
- LPG
- LPG is a bi-product of the refining process of crude oil. The UK produces around 4 million tonnes of LPG per year. Although LPG is odourless a stenching agent is added to make it detectable. In use, LPG turns from a liquid to a gas, which accounts for its cleaner combustion.
- LPG Injector
- Under the control of the ECU the injector is pulsed to allow the correct amount of fuel into the engine.
- Venturi
- Air flows through the centre of the ring and is mixed with LPG coming from the outlets on the outside of the ring.
