Method of controlling an automatic engine stop during coasting phase

An engine stop and stage control technology, applied in the field of automotive systems, which can solve problems such as poor drivability and operation, and the engine is not safe.

Active Publication Date: 2015-04-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In some cases, using this "slide" function can result in poorer drivability and handling of the vehicle
In fact, while there is no problem during straight driving, and during smooth road conditions, under actual driving conditions it may not be safe for the engine to shut off at high vehicle speeds

Method used

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  • Method of controlling an automatic engine stop during coasting phase
  • Method of controlling an automatic engine stop during coasting phase
  • Method of controlling an automatic engine stop during coasting phase

Examples

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Embodiment Construction

[0112] Some embodiments may include such as figure 1 A motor vehicle system 100 is shown, which includes an internal combustion engine (ICE) 100 (in this example a diesel engine), a transmission (in figure 1 In the example shown in FIG. The hybrid powertrain system has at least figure 1 DC electric drive axle in the example, rear axle 520 .

[0113] Such as figure 2 and image 3 As shown, the ICE 110 has an engine block 120 defining at least one cylinder 125 having a piston 140 coupled to rotate a crankshaft 145 . Cylinder head 130 cooperates with piston 140 to define combustion chamber 150 .

[0114] A fuel and air mixture (not shown) is placed in combustion chamber 150 and ignited, resulting in thermally expanding exhaust gases that cause reciprocating motion of piston 140 . Fuel is provided by at least one fuel injector 160 and air passes through at least one air intake 210 . Fuel is provided to fuel injector 160 at high pressure from fuel rail 170 fluidly connected...

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PUM

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Abstract

The present disclosure provides a method of controlling an automatic engine stop of an automotive system, during a coasting phase. A dynamic speed threshold is calculated as a minimum value of a plurality of dynamic speed values. Each dynamic speed value is calculated as a function of an automotive system parameter such as a steering wheel angle, a steering wheel angle rate, a wheel speed difference, an antilock braking system status, or an electronic stability control status (p5) and / or a road condition such as road grade. The automatic engine stop is enabled when a vehicle speed is lower than the dynamic speed threshold.

Description

technical field [0001] The present disclosure relates to a method of controlling automatic engine stopping during the coasting phase of a vehicle. The method is particularly suitable for automotive systems, with or without a hybrid system, and with any kind of transmission, provided with a controller configured to automatically stop and start the internal combustion engine. Background technique [0002] It is known that many automotive systems provide a controller, usually an Electronic Control Unit (ECU), which is configured to run, among other functions, a so-called "Stop & Start" (or simply S / S )Features. By using this function, the ECU automatically shuts down and restarts the internal combustion engine to reduce the time the engine spends idling, thus reducing fuel consumption and emissions. [0003] In particular, one of the elements of the engine manufacturer's roadmap is to reduce fuel consumption as well as carbon dioxide (CO 2 ) emissions, an extension of Stop &...

Claims

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Application Information

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IPC IPC(8): F02D11/10F02D29/02
CPCF02N11/0837F02N2200/0801F02N2200/0805F02N2200/0808F02N2200/124Y02T10/40F02D41/04F02D41/042F02N11/0814
Inventor R.罗马纳托
Owner GM GLOBAL TECH OPERATIONS LLC
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