Method and apparatus for heating gas valve, in particular fuel injector, and a motor vehicle having method

A technology of fuel injectors and gas valves, which is applied in the direction of fuel injection devices, fuel injection control, mechanical equipment, etc., and can solve problems such as hazards, injectors not working properly, cold start, etc.

Active Publication Date: 2018-06-29
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the opening force applied while actuating the injector is not sufficient to overcome the resistance caused by binding in addition to the restoring force of the valve spring and the gas reaction force in the fuel rail, the injector will not function properly and cold starts will suffer harm

Method used

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  • Method and apparatus for heating gas valve, in particular fuel injector, and a motor vehicle having method
  • Method and apparatus for heating gas valve, in particular fuel injector, and a motor vehicle having method
  • Method and apparatus for heating gas valve, in particular fuel injector, and a motor vehicle having method

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Embodiment Construction

[0027] In the present application, the method according to the invention for heating a gas valve 31 with a magnetic coil 36 by generating swirl currents is described in terms of a gas valve 31 configured as a fuel injector 31 for injecting a gaseous fuel, such as CNG (compressed natural gas) Method and device according to the invention. However, the gas valve 31 can also be, for example, a gas valve 31 with a magnetic coil 36 for metering LNG (liquefied natural gas), wherein metal-to-metal seals, for example, can also bond due to the low temperature and can be achieved by this method and this The device is heated. In addition, the gas valve 31 with magnetic coil 36 is also, for example, an electrically regulated pressure regulator or an electric shut-off valve (shut off valve), or other gas valve 31 with magnetic coil 36 , wherein, due to low temperatures, Bonding of metal-elastomer seals or bonding of other seals, such as metal-to-metal seals, occurs.

[0028] figure 1 A s...

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Abstract

The invention discloses a method for heating a gas valve (31) having a magnetic coil (36), in particular a fuel injector (31), by generating a vortex. The gas valve (31) can be opened by energizing the magnetic coil (36), a current (13) is loaded to the magnetic coil (36) through a voltage source (21, 22), the magnetic coil (36) is loaded at an alternating voltage (12) corresponding to the voltage / time characteristic (10) during at least one heating duration (49, 50), the vortex is generated in the gas valve (31), and the current (13) is less than the opening current intensity (Io) required toopen the gas valve (31) during the entire heating duration (49, 50).

Description

technical field [0001] The invention relates to a method for heating a gas valve, in particular a fuel injector. Background technique [0002] An internal combustion engine has one or more cylinders with combustion chambers into which a precisely defined quantity of fuel is injected at precisely defined times in the working cycle of the cylinders. To meter the fuel quantity, fuel injectors are used. All fuel injectors together with their actuating devices form the injection system. [0003] Fuel injectors for gaseous fuels must have particularly low leakages in order to exactly observe the predetermined time-quantity behavior for the injection. Therefore, instead of the metal-to-metal seals commonly found in fuel injectors for liquid fuels at the metering location, metal-to-elastomer seals are often used. At cold ambient temperatures, these seals tend to stick. If the opening force applied while actuating the injector is not sufficient to overcome the resistance caused b...

Claims

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Application Information

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IPC IPC(8): F02D41/20F02D19/02
CPCF02D19/022F02D41/20F02D19/02F02D2041/2027F02D2041/2044F02D2041/2051F02D2041/2065F02M21/0254F02D41/0027F02D2041/2003F02M53/06Y02T10/30
Inventor J·费尔斯特K·坎恰尔M·瓦尔特M·雷迪斯
Owner ROBERT BOSCH GMBH
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