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Systems and methods for active engine mount diagnostics

An engine rack, active technology, applied in the direction of engine testing, electric engine control automatic control, engine components, etc., can solve the problems of not being recognized in time, not being able to observe, etc.

Active Publication Date: 2022-04-19
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there may be instances where the vehicle operator does not recognize the undesired NVH in time to prevent vehicle complications due to the undesired NVH
Additionally, there may be instances, such as in the case of autonomous vehicles (AVs), where the vehicle or occupants may not be present to observe undesired NVH

Method used

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  • Systems and methods for active engine mount diagnostics
  • Systems and methods for active engine mount diagnostics
  • Systems and methods for active engine mount diagnostics

Examples

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Embodiment Construction

[0023] The following description relates to systems and methods for diagnosing whether an active engine mount in a vehicle is functioning as expected. For example, if figure 1 As shown in the illustrated vehicle system, an active engine mount may be configured to isolate unwanted noise, vibration, and harshness (NVH) from the vehicle chassis and cabin. figure 2 An example of an external view of an active engine mount is depicted in . In some examples, the active engine mount may be controllable into at least two states, such as a first damped mode (eg, idle mode) and a second enhanced mode (eg, ride mode). therefore, image 3 An example active engine mount controllable to a first damping mode and a second stiffening mode is shown in . In some examples, a vehicle system may include a vehicle propelled solely by an engine that burns fuel, such as gasoline, diesel, or other fuel blends. However, in some examples, the vehicle system may include a hybrid vehicle, such as a hyb...

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Abstract

The present application relates to systems and methods for active engine mount diagnostics, providing methods and systems for diagnosing whether active engine mounts configured to isolate engine vibrations from the cabin and chassis of a vehicle are functioning as desired. In one example, a method includes indicating degradation of an active engine mount by a combustion event causing degradation in a preselected engine cylinder, and operating the active engine mount in a plurality of modes, the indication being responsive to The amount of vehicle chassis vibration. By monitoring chassis vibrations based on combustion events causing degradation, and further in response to active engine mounts being controlled into modes, it may be possible to indicate whether the active engine mounts are functioning as desired.

Description

technical field [0001] The present description generally relates to methods and systems for controlling a vehicle engine to induce vehicle vibrations to diagnose whether an active engine mount is functioning as desired. Background technique [0002] Engines have traditionally had strong rubber mounts to isolate engine vibrations from the cabin and chassis, where the rubber naturally absorbs vibrations from the engine. However, in performance and high-end cars, if the rubber is too flexible, certain vehicle handling can cause high loads, and this can stress joints in the vehicle, eg in the exhaust system. Therefore, adjustable active engine mounts have been developed that can be controlled to vary damping characteristics according to engine load. [0003] For example, active engine mounts may be configured to be soft when the engine is idling to absorb unwanted vibrations. However, at higher engine speeds, active engine mounts may be configured to stiffen to limit undesired...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G01M15/00
CPCG01M13/00G01M15/00F02D41/221F02P5/045F02P5/1508F02P5/1512F02D17/02F02D37/02F02D41/0002F02D2200/50F02D2250/18F02D2250/24F02D41/021B60K5/1225F02M37/0082F02D41/0087B60K5/12F16F5/00F16F13/00B60W30/20B60W40/12B60W10/10B60W10/06B60W10/18B60W10/30B60K5/1283B60W2030/206B60W2510/06B60W2710/06F02P5/152F02D41/1498G01M15/04
Inventor A·M·杜达尔
Owner FORD GLOBAL TECH LLC