Rover 2400 Turbo Diesel
Although the market for cars with diesel engines in the 80's grew to produce the number Rover SD1 turbos small in relation to the production of the models with petrol engine. It was therefore not appropriate to develop a new diesel engine for the Rover which therefore should still economically and quickly go. An existing engine manufacturer was the answer.
VM is the most important specialised engine producer of Italy with a long list of successes in the market of diesel engines for cars, vessels, and stationary industrial engines.
The VM 2 liter engine that was chosen by Austin Rover already existed as the only power source in the Alfa-Romeau Date diesel. But the Rover SD Turbo is the first vehicle fitted with this engine in a 2392 cm3 version. In the examination of the alternatives for answering this engine is fully to the main criteria: price, performance, fuel consumption, weight and compact enough to sit in the space available.
The engineers of Rover designed a new sump, oil suction line, flywheel and flywheel housing. These were the only important part that had to be changed to the engine in the Rover to fit bodywork and him to connect to the existing transmission parts.
There is a recognizable difference between the operation of a diesel engine and that of a petrol engine. Diesel engine has no electrical ignition system, the diesel oil kindled by a process that is called compression ignition. The operation of a diesel engine has agreements with those of a four-stroke petrol engine, but the construction of a diesel engine differed from the petrol engine because the cylinder block, the cylinder head and the pistons at a higher pressure and higher temperatures.
Diesel Fuel is a bright combustible oil which is harder ablaze than petrol. The Rover SD Turbo has a diesel fuel with a minimum cetane number of 47, the most dieselolieen have a cetane number between 50 and 60. There are summer and winter qualities. The winter fuel has a slightly higher centrically number and is more resistant to vlokvorming at low temperatures.
In order to achieve the temperatures, where diesel oil ignites spontaneously diesel engines have a significantly higher compression ratio than petrol engines. Petrol engines have in general a compression ratio of 9:1. The compression ratio of diesel engines veri honors between 18:1 to 24:1. The Rover SD1 Turbo has a compression ratio of 20.5:1 without turbo and of 21.5:1 with the turbo at maximum pressure.
The design of the combustion chamber must be such that the air and the fuel good swirl through one another during the short period of combustion. This swirling movement displays each miniscule fuel drop of a good contact with the Oxygen molecules in the air making a rapid and even burning is promoted.
Determine the moment of the fuel injection system is the time that this whole combustion process demands. While in a petrol engine the flow divider for the spark is in the case of a diesel engine the injection pump responsible for the supply of the quantity of fuel into the combustion chamber, just at the time when the speed and load of the engine request.