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Methods and systems for a common aspirator valve

An aspirator, public technology, applied in the direction of charging system, control valve and air release valve, brake, etc., can solve the problems of increasing system cost and complexity, complex cost, etc.

Pending Publication Date: 2019-02-26
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an example, individually controlling at least two valves that control flow through the aspirator can be complex and costly
Further, if there are other aspirators across the throttle (for example, to generate vacuum for additional vacuum consumers such as fuel vapor purge systems), additional valves are required to prevent throttle bypass, further increasing System cost and complexity

Method used

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  • Methods and systems for a common aspirator valve
  • Methods and systems for a common aspirator valve
  • Methods and systems for a common aspirator valve

Examples

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Embodiment Construction

[0013] The following description relates to methods for controlling vehicle engines such as figure 1 and figure 2 A system and method for airflow in a vacuum generating system of the example engine system shown). The engine system may include a single aspirator shut-off valve ( figure 1 ) or a combined aspirator shut-off valve and intake throttle (for example, in the form of a three-way valve) ( figure 2 ) to control airflow during different engine operating conditions. exist image 3 An example graph is shown in the example graph shown as figure 1 and figure 2 Effective throttle area as a function of throttle position (including aspirator cutoff valve position) in the engine system. exist Figure 4 and Figure 5 An example aspirator shutoff valve adjustment is shown in . refer to Figure 6 Predicted engine operation is shown. By adjusting the aspirator shutoff valve during selected engine operating conditions, vacuum generation for each vacuum consumer can be pr...

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PUM

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Abstract

The application relates to methods and systems for a common aspirator valve. Methods and systems are provided for controlling air flow through at least two aspirators coupled across an intake throttle. In one example, a method includes, during a first condition, opening a common aspirator shut-off valve to direct intake air through a first aspirator and a second aspirator each coupled across an intake throttle, and supplying vacuum generated by the first aspirator and the second aspirator to respective vacuum consumption devices as demanded. The method also includes, responsive to a second condition, closing the common aspirator shut-off valve and supplying intake manifold vacuum to the respective vacuum consumption devices as demanded.

Description

technical field [0001] The present invention generally relates to methods and systems for controlling a vacuum actuator system with an aspirator shutoff valve in a boosted engine. Background technique [0002] An automobile engine may have a vacuum-utilizing system (also referred to as a vacuum consumer) coupled to the engine intake system, which may include a crankcase ventilation system for exhausting blow-by gases into the intake manifold, with A fuel vapor purge system that purges fuel vapors from the fuel vapor canister into the intake manifold, and a brake that uses vacuum from the engine intake to increase the force applied by the pedal (or other vacuum actuator) power booster. To regulate gas flow from each of the vacuum-utilizing systems during various engine operating conditions, one or more aspirators may be coupled to each of the vacuum consumers to generate vacuum and increase the vacuum consumer's purge efficiency. [0003] Pursifull et al. in US Patent Appl...

Claims

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Application Information

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IPC IPC(8): F02M35/10F02D41/00F02D9/00
CPCF02D9/00F02D41/0007F02M35/10222F02M35/10229F02M35/10255B60T13/72F02D41/18F02D2250/41F02M35/104Y02T10/12B60R16/08B60T15/00F02D9/08
Inventor R·D·普斯福
Owner FORD GLOBAL TECH LLC