Unlock instant, AI-driven research and patent intelligence for your innovation.

Altitude compensation for target engine speed in hybrid electric vehicle

A hybrid electric, engine speed technology, applied in hybrid vehicles, the layout of multiple different prime movers of general power plants, engine control, etc., can solve unsatisfactory problems and achieve the effect of fast response time

Active Publication Date: 2014-09-17
FORD GLOBAL TECH LLC
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach may also be less satisfactory for some applications as it is highly processor intensive requiring the exact same calculations at many different engine speeds for each execution cycle

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Altitude compensation for target engine speed in hybrid electric vehicle
  • Altitude compensation for target engine speed in hybrid electric vehicle
  • Altitude compensation for target engine speed in hybrid electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Embodiments of the disclosure are described herein. It should be understood, however, that the disclosed embodiments are merely examples and that other embodiments may take various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0025] As will be understood by those of ordinary skill in the art, various features shown and described with reference to any one figure can be combined with features shown in one or more other figures to produce the embodiment. The combinations of features shown provide representative embodiments for typical applications. Various combinations and modifications of the features consistent with the teachings of the p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to altitude compensation for target engine speed in hybrid electric vehicle. A method for controlling a hybrid electric vehicle includes selecting a first target engine speed in response to a driver power request, calculating an available engine torque at the first target engine speed, adjusting the target engine speed if the available engine torque is insufficient to satisfy the driver power request, and commanding an engine to run at the target engine speed. The first target engine speed is optimized for fuel economy. The calculated available engine torque is less than a calculated maximum engine torque at the target engine speed, such that a torque reserve is maintained for engine vacuum.

Description

technical field [0001] The present disclosure relates to hybrid electric vehicles and compensation for altitude conditions when setting a target engine speed. Background technique [0002] Hybrid electric vehicles may include a generator for controlling engine speed. Engine speed and torque may be selected based on a calibratable map, which may be referred to as an energy management system (EMS) map, in response to power demand. The EMS map is calibrated to achieve desired fuel economy and various other factors including performance, emissions, vehicle noise, vibration and harshness. EMS diagrams are usually collated based on engine performance at sea level. [0003] Under some environmental conditions, such as increased altitude or increased ambient temperature, the engine's available torque may decrease at some or all engine speeds. Under such conditions, the engine may not be able to provide the torque specified by the EMS map at the target speed, and therefore, the en...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02D29/02
CPCF02D28/00B60K6/365B60K6/445B60W10/06B60W20/00B60W30/18B60W2710/0644B60W2555/40Y02T10/62
Inventor 卡罗尔·路易丝·大久保
Owner FORD GLOBAL TECH LLC