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Method and apparatus for operating a motor vehicle in coasting mode of operation

A mode of operation, technology of motor vehicles, applied in the direction of machine/engine, mechanical equipment, engine control, etc., to achieve the effect of preventing rattling

Active Publication Date: 2016-11-16
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Various driver interactions, such as activation of the brake pedal, activation of the accelerator pedal or activation of the gear selector lever, cause the drivetrain to shut down, i.e. end the coasting operating mode and lead to conventional vehicle behavior

Method used

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  • Method and apparatus for operating a motor vehicle in coasting mode of operation
  • Method and apparatus for operating a motor vehicle in coasting mode of operation

Examples

Experimental program
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Embodiment Construction

[0032] figure 1 A control scheme repeatedly executed in an electronic engine control unit of a motor vehicle with an internal combustion engine, a foot clutch and a manual shift transmission is shown. As soon as the motor vehicle is activated, the route is initialized (step S1 ). As soon as the route is executed, the current engine speed and the current settings of the accelerator and brake pedals are read by suitable sensors (step S2) and it is checked whether some kind of coasting prohibition flag is set in the electronic engine control unit (steps S3, S4) . If the taxiing prohibition sign is set, the route returns to step S2.

[0033] There are various conditions under which a coasting prohibition sign can be set, for example if there has been a sudden throttle movement within a certain preceding period of time, or if you are currently traveling on a certain part of the road with a slope. In motor vehicles with an automatic transmission, the coasting prohibition sign can...

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PUM

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Abstract

The method involves rolling the motor vehicle on a plane road in a drift-less manner and without noticeable engine drag torque, when there is no propulsion demand or brake demand of a driver of the motor vehicle. The sailing mode is produced not by automatic opening of a drive train, but is forged with a locked clutch such that so much fuel or air- mixture is supplied to the internal combustion engine so that the engine drag torque is compensated to a predominant portion, but not completely. An independent claim is included for a device for operating a motor vehicle with an internal combustion engine in a sailing mode.

Description

technical field [0001] The present invention relates to a method and apparatus for operating a motor vehicle with an internal combustion engine in a coasting mode of operation, wherein the motor vehicle travels on a substantially level road at a substantially The vehicle rolls in a manner without propulsion and with virtually no perceptible engine drag torque. Background technique [0002] Such a method and a device are known from the patent document DE 10 2008 029 453 A1. [0003] If the driver takes his foot off the gas pedal, a conventional motor vehicle with an internal combustion engine will become slower and slower due to engine drag torque. Only in the case of relatively large negative gradients is the engine drag torque insufficient to reduce the vehicle's speed. It also depends on the weight of the vehicle, the vehicle's current speed, and the gear currently engaged. [0004] In motor vehicles with an internal combustion engine and an automatic transmission, ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/12B60W30/18
CPCF02D41/12F02D41/023F02D41/123F02D2200/101F02D2200/602F02D2250/18
Inventor 乌尔斯·克里森安德里亚斯·R·沙梅尔戈茨-菲利普·韦格纳乌韦·古森
Owner FORD GLOBAL TECH LLC