VW Dieselgate TDI Jetta to tell about HP Loss

With the freshly revealed Volkswagen Dieselgate scandal, the German automaker is taking a big hit for installing exactly what the EPA refers to as a defeat gadget in vehicles equipped with the 2.0-liter TDI turbodiesel four-cylinder engine. In this brand-new video clip, The Fast Lane Auto puts a Volkswagen Jetta TDI on a dynamometer to see how much power the automobile makes with the emissions controls effective.

The loss gadget in the Volkswagen TDI models is buried in the engine computer’s software program and also runs different programming relying on whether the motor vehicle is being driven on the street or strapped to a dynamometer for exhausts screening. When running a smog test, the loss gadget begins and lowers engine power and energy economy. To verify this power disparity in between the two methods, The Fast Lane Auto acquires a defeat device-equipped auto to examination.

A 2011 Jetta TDI with the six-speed DSG dual-clutch transmission ranked 140 hp and also 236 lb-ft of torque at the flywheel is used as the test automobile. Using an all-wheel-drive dyno, the back wheels are driven to deceive the computer into assuming that the car is working on the street. The automobile takes down 114 hp as well as 214 lb-ft at the front wheels, which is dealt with to 138 hp as well as 260 lb-ft at the flywheel.

Next off, the automobile is rerun with merely the front wheels on the dyno. After the car changes to the brand-new computer system programs, it registers 112 hp as well as 188 lb-ft at the wheels, which is fixed to 136 hp as well as 228 lb-ft. While the peak horsepower numbers are similar, the peak torque numbers are significantly reduced. However a lot more considerable compared to the difference in peak power is the variation at particular points on the dyno chart. The biggest discrepancy between both runs was 15 hp and also 32 lb-ft in the reduced rev range. A substantial quantity. The shop wasn’t able to test NOx emissions.