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>:> means greater than -example 2 > 1 < means less than - example 1 < 2 ≤ means less than or equal to. ≥ means greater than or equal to. | |
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λ:Lambda, a letter from the Greek alpahbet. In automotive engineering, it is used to represent the stoichiometric ratio of the amount of air required to burn a fuel. For example, for diesel, the value is approximately 14.5:1, meaning that it takes 14.5 parts of air to burn 1 part of diesel. The stoichiometric ratio for petrol is approximately 14.7:1. |
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1104D:
This engine has full electronic control of the fuel system - common rail with electronic injectors. As of April, 2012, we operate 3 of these engines. |
1106C:
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12V Electrical Training Board:
In order to facilitate this exercise, we use 12V electrical training boards. These are boards of steel construction, with a working tray and a base that can accommodate a 12V battery. This set up allows apprentices to construct the various circuits, and connect the board to an engine fitted with an alternator. This set up allows each apprentice to wire up all the basic electrical circuits and components found in a typical plant vehicle. | |
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12V Test Lamp:
During the induction phase of the course, you will be issued (at your own expense) with a 12V test lamp. |
18650:CAUTION: Li-ion batteries do not behave the same way as lead acid batteries do, when they are being charged and discharged.
Make sure you know how these batteries operate, how they are charged and how you can safely use and discharge them.
If this type of battery is mis-handled or abused in any way (physically damaged), there is an immediate and great risk of fire or explosion.
The number '18650' describes a battery, similar in size to an AA battery. An 18650 is a lithium ion rechargeable battery. The correct name is “18650 cell”. The 18650 cell has voltage of 3.7v and a capacity of between 1800mAh and 3500mAh. The cell name is based on its dimensions: the cell is 18mm in diameter and 65mm in length. For comparison purposes, an AA cell is a 14500 cell - 14mm in diameter and 50mm in length | |
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1N4001 Diode:
During the Phase 2 course, we use these diodes to make half-wave rectifiers, full-wave rectifiers, and to suppress voltage spiking on 30 amp relays in circuits such as the time-delay circuit built as part of the Electrical Module. | |
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