We have tackled the problem of weight across the board in recent years and have achieved reductions of up to 50%.
Many of these reductions have been achieved by combining individual components into integrated subassemblies and modules. For example, the grouping of intake pipes, electronically controlled throttle device, fuel injectors, air cleaner, sensors and control unit - into one, complete Intake Module, has substantially reduced its size and weight. Modern multiplex systems have made further reductions. Our CAN bus system can transmit a number of signals down a single data line, whereas before each signal would normally require a separate cable, thereby reducing the vehicle's weight and minimising the use of copper - a valuable raw material.
We can see that in the future, control units will be manufactured with newly developed micro-hybrid technology, and the miniaturisation will produce further weight savings of a factor of 2 to 3.