Green Car Congress

FEBRUARY 24, 2011

NREL’s Fleet Test and Evaluation Team recently completed a year-long technology evaluation of gasoline hybrid electric (gHEV) FedEx Express delivery trucks compared with conventional diesel vehicles. On drive cycles representing routes with fewer stops and accelerations, the gHEV trucks demonstrated similar fuel economy to the diesels.

Fuel Economy 186

Fuel Economy Economy Gasoline Diesel 186

Green Car Congress

JUNE 12, 2010

Fuel economy was similar between the gHEVs and diesel vehicles, except for the highest kinetic intensity drive cycle where the hybrid exhibited ~20% higher fuel economy. NREL started a 12-month in-use technology evaluation comparing in-use fuel economy and maintenance costs of gHEVs and comparative diesel parcel delivery trucks in April 2009.

Fuel Economy 199

Fuel Economy Economy Gasoline Diesel 199

Green Car Congress

MAY 11, 2009

By providing effective and reliable starting power for large diesel engines at low temperatures or in frequent stop-start usage the supercapacitors will allow the vehicle battery to be optimized for the application. Furthermore, the performance of a supercapacitor remains stable over a very wide temperature range (typically -40 °C to +70 °C).

Nickel Cadmium 150

Nickel Cadmium Ni-Li Nickel Metal Hydride Diesel 150

Green Car Congress

JULY 2, 2009

It is estimated this hybrid-electric technology will provide a saving of around 20 per cent on fuel and greenhouse gas emissions compared to a conventional diesel bus. Economic impacts will be assessed by evaluating the fuel and maintenance performance of the vehicles over an extended period of 12 months in service. Volkswagen TDI 2.0L

Hybrid 150

Hybrid Australia Li-ion NiMH 150

Clean Fleet Report

NOVEMBER 2, 2023

The nickel-metal hydride (NiMH) battery is charged when applying the brakes or coasting. Our focus is on vehicles that offer the best fuel economy in their class, which leads us to emphasize electric cars, plug-in hybrids, hybrids and diesels. Your numbers may differ.

Lexus 77

Lexus Nickel Metal Hydride MPG Clean 77

Green Car Congress

MARCH 20, 2009

Most participants noted that developing fuel cell bus maintenance facilities was not as challenging as expected. Diesel buses typically operate for 18 to 20 hours per day, over a range of about 186-217 miles (300-350 km), using one tank of fuel. Key challenges to commercialization revealed by the demonstrations were: Vehicle Range.

Nickel Metal Hydride 170

Nickel Metal Hydride Hydrogen 2002 Fuel 170

Clean Fleet Report

AUGUST 25, 2022

MG 1 starts the gasoline engine and charges the nickel-metal hydride (NiMH) battery, while MG2 drives the front wheels and regenerates the battery during braking and coasting, and MGR drives the rear wheels and also regenerates the battery. The system comprises a 3.5-liter Observations: 2022 Lexus RX 450h F Sport AWD.

Lexus 94

Lexus Fuel Economy Hybrid Nickel Metal Hydride 94