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Motor-assisted variable geometry turbocharging system

A turbo system, geometry technology, applied in belt/chain/gear, transmission, combustion engine, etc., to solve problems such as slow response, delayed engine and vehicle response, etc.

Inactive Publication Date: 2002-09-04
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These fuel limiting devices slow down the throttle opening response and make the engine and vehicle react sluggishly

Method used

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  • Motor-assisted variable geometry turbocharging system
  • Motor-assisted variable geometry turbocharging system
  • Motor-assisted variable geometry turbocharging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Detailed Description of Preferred Embodiments

[0028] In order to improve the response of the engine and vehicle to the opening of the throttle valve, in order to increase the boost level of the engine intake system for rapid acceleration, an external power source is required to operate the turbocharger at high speed when the engine is idling. The external power source may be an electric motor, a hydraulic motor, an air motor or the like, especially an actuator whose power output is controllable. The external power source of the preferred embodiment and examples given below is an electric motor which, at engine idle, engages the supercharger rotor and increases the rotational idle speed of the rotating assembly.

[0029] If a higher boost pressure is available at engine idle than the turbocharger can provide from exhaust gas energy alone, this allows for faster fuel injection into the engine cylinders during acceleration and reduces black smoke during transitions and ...

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Abstract

A variable geometry turbocharging system with a booster having a booster capable of powering the turbocharger shaft especially at low exhaust gas volumes. In addition, the turbocharger can control the direction of the compressor air intake and / or the flow of exhaust gas to a twin volute expander. These controls are directly or indirectly controlled by the engine control unit in order to improve the efficiency of the supercharger. In the preferred embodiment, the actuator is an electric motor mounted directly on the supercharger shaft between the supercharger expander and the compressor and within the supercharger casing.

Description

field of invention [0001] The present invention generally relates to a variable geometry component for use in a turbocharger on an internal combustion engine operating over a wide range of speeds and loads. Background of the invention [0002] Fixed geometry turbochargers can be designed to work efficiently at specific engine loads and speeds. However, when operating over a wide range of engine speeds and loads, the compressor and turbine components are forced to operate away from their design points and thus incur a loss of efficiency that can adversely affect engine performance. If the turbocharger is matched to an engine at rated speed, the supercharger will operate significantly away from its maximum efficiency as the engine torque drops to allow the engine to run at low speeds. Conversely, if the turbocharger is matched to an engine's low speed range, the turbocharger will be prone to "overspeed" when the engine is running at maximum speed and load. [0003] To preven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B37/14F02B67/06F02B37/10F02B37/22F02B37/24F02B61/02F02B75/02F16H7/12
CPCF02B37/025F02B37/10F02B37/22F02B37/24F02B39/10F02B2075/027Y02T10/12F02B37/14
Inventor E·M·哈利米W·E·乌伦维贝尔R·P·马鲁夫
Owner HONEYWELL INT INC
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