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Methods and system for operating a vehicle having a dc/dc converter

A technology of a DC converter and an operating method, applied to starting devices with mechanical power storage, vehicle components, transportation and packaging, etc., can solve the problems of long rotation starting time, the engine will not start, etc., to improve the starting consistency Effect

Pending Publication Date: 2021-06-11
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the engine may exhibit a longer cranking time and / or the engine may not start

Method used

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  • Methods and system for operating a vehicle having a dc/dc converter
  • Methods and system for operating a vehicle having a dc/dc converter
  • Methods and system for operating a vehicle having a dc/dc converter

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Embodiment Construction

[0014] This instruction is concerned with operating the DC / DC converter of the vehicle. The DC / DC converter can operate in a manner that improves engine starting. Specifically, the voltage output of the DC / DC converter may be adjusted in response to vehicle operating conditions such that the torque generating capability of the electric machine is more consistent across various vehicle operating conditions. For example, when the windings of the electric machine are at a temperature above a threshold temperature, the output voltage of the DC / DC converter may increase so that the output torque of the electric machine may be sufficient to spin the engine at a desired speed. By ensuring that the vehicle is spin-startable via the electric motor at a uniform speed (eg, spinning via the electric motor under power from the electric motor before combustion in the engine is sufficient to spin the engine at a predetermined speed), it is possible to make engine start times more uniform. T...

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PUM

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Abstract

The disclosure provides methods and system for operating a vehicle having a DC / DC converter. The method for operating the vehicle that includes the DC / DC converter is described. In one example, the method includes adjusting an output voltage of the DC / DC converter to increase torque of a belt integrated starter / generator. The output voltage of the DC / DC converter may be adjusted before and during engine cranking.

Description

technical field [0001] The present description relates to methods and systems for operating a vehicle including a direct current to direct current (DC / DC) converter. The method and system may reduce engine cranking time and increase the likelihood of engine cranking during engine cranking cycles. Background technique [0002] Vehicles may include an internal combustion engine that may be started by rotating the engine via an electric machine and supplying fuel to the engine. During many operating conditions, the electric machine may spin the engine at a speed that promotes combustion within the engine. However, sometimes the torque output of the electric machine may not be sufficient to spin the engine at a speed that promotes combustion within the engine. For example, if the electric machine is supplied with current via a degraded electrical energy storage device, the electric machine may not output sufficient torque to spin the engine at a speed that promotes combustion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/26B60W50/00B60R16/03
CPCB60R16/03B60W10/06B60W10/08B60W10/26B60W50/00B60W2050/0043B60W2710/06B60W2710/08B60W2710/244F02N11/006F02N11/04F02N11/0866F02N15/08F02N19/005F02N2011/0888F02N2019/008F02N2200/022F02N2200/023F02N2200/024H02J7/1423H02J7/1446H02J2310/46F02N2200/021F02N2200/045
Inventor 亚历克斯·奥康纳·吉布森约翰·埃里克·罗林杰大卫·汉考克大卫·卢詹姆斯·M·巴西莱
Owner FORD GLOBAL TECH LLC
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