2 edition of Evaluation of automobile drivetrain components to improve fuel economy found in the catalog.
Arthur D. Little, Inc.Final report.March 1979.Contract no.: DOT-TSC-1046.Report no. DOT-TSC-NHTSA-79-12.HS-803-840.Includes bibliographical references.
|The Physical Object|
|Pagination||xvi, 105 p. :|
|Number of Pages||58|
nodata File Size: 1MB.
Accident records confirm that there is a statistical relationship between overall fleet safety, and the average weight of the vehicles in the fleet.
series and parallel hybrid sensitivities is somewhat coincidental, as this sensitivity is highly dependent upon To compute the fuel economy sensitivity to mass, control strategy. One reason why people continue to choose their cars over public transportation is because of freedom. mechanical energy provided by the motor will be subjected to fewer losses by circumventing the transmission, 2 Another opportunity hybrid vehicles offer is the use regenerative braking--regenerative braking torque will of alternative HPUs, such as gas turbines, fuel cells, and likewise suffer fewer losses, and 3 HPU-to-motor charging-- Stirlings in series or perhaps parallel, in the case of the using the HPU to drive the motor as a generator will be Stirling HVs.
Improvements that contributed to better fuel economy, were, for instance, vehicle downsizing, tire improvements, reduced aerodynamic drag, the application of new lightweight materials, more efficient automotive structures, and greatly improved engines and total drive trains.
With that focus, we lead-acid, with characteristics adapted from Optima . It has been documented that driving habits indeed have a substantial impact on the overall fuel economy of the vehicle. The shape of this map, then, is largely determined by battery turnaround efficiency and to a perhaps lesser extent Parallel HV - The parallel hybrid control strategy by the HPU efficiency map.
Propulsion system components for each of the three available now .September 6, 1996 effectiveness. One major concern is that the technologies developed to improve fuel economy will be forsaken. Other signs pointing toward the fact that the market is not supporting fuel economy are that consumers are purchasing more light trucks, instead of passenger vehicles.
The fuel economy gain expected from a 10 percent reduction in weight is expected to be 6. 15 these parameters did not strongly affect the fuel economy of 29.
compared to industry vehicle simulation programs and has• Let us examine the effect of battery power flows in hybrid vehicles depend upon each other and specific power. Abstract National Highway Traffic Safety Administration, Office of Research and Development, Washington, D. Even though most current proposals for increases in fuel economy are predicted without the calculations of changing interior volume or power, it is becoming a foregone conclusion that higher horsepower cannot be allowed to continue.
It should be noted here that a lot of devoted eco modders scrap their cars' entire engine system in favor of full hybrid or electric conversions. With the growing inevitability looming that energy will soon be consumed, a conscious effort to use energy wisely must be implemented. Averaging Time s Figure 5. Society memberships : Combustion Society of Japan CSJSAE and JSAE. The HPU power represented by the dots The PNGV targets listed as 1-3 above must be varies directly with the tractive motor power represented by a attained at curb weight plus 136 kg for the driver and solid linebut is higher by a state-of-charge-dependent factor passenger, while the gradeability requirement is prescribed at to allow for losses in the generator and battery.
In current vehicles, it may take a range of up to 12,000 miles of slow driving before the vehicle is completely broken in.
Even a newer version of the same vehicle or powertrain may increase fuel economy by a few points as engineers are continuously improving engine performance and aerodynamics model year over model year.
The commands of model predictive control are applied to the powertrain components through appropriate low-level controllers: standard proportional—integral controllers for electric machines, and sliding-mode controllers for engine torque control.