The ECU is able to compare start of injection with actual delivery from a signal
produced by the needle motion sensor in the injector.
Control of exhaust gas recirculation is by a simple solenoid valve. This is con-
trolled as a function of engine speed, temperature and injected quantity. The
ECU is also in control of the stop solenoid and glow plugs via a suitable relay.
Figure 8.56 is the complete layout of an electronic diesel control system.
8.5.5 Rotary pump system
The Bosch rotary VR pumps are used on high-speed direct injection diesel
engines for cars and light commercial vehicles. They are radial-piston distributor
injection ...
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