VOLVO ENGINES DO A BETTER JOB OF KEEPING FUEL COOL.
Volvo engines do a superb job of keeping fuel temperature regulated, allowing them to operate more efficiently for better fuel economy and lower operating costs.
Engine fuel systems are divided into low- and high-pressure zones. The low-pressure zone filters and supplies fuel to the high-pressure zone, which injects fuel into the cylinders. The cam actuates the injector plunger and produces the high pressure needed to inject atomized fuel for an efficient burn. The fuel injector solenoid valve allows the fuel to be injected or bypassed.
Injectors feed fuel to the engine based on volume. Heated fuel is less dense (less BTU per volume), and therefore, engine performance decreases as fuel temperature increases. Addition of fuel coolers-which also add cost and complexity-can compensate for the increased heat.