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Apparatus and method for assisting cold start of an engine

An engine, cold start technology, applied in the direction of engine starting, engine components, machines/engines, etc., can solve the problems of increasing operating costs, and achieve the effect of eliminating the need for choke valves or additional electronic valves

Inactive Publication Date: 2019-07-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will result in unnecessary fuel consumption, thereby increasing operating costs

Method used

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  • Apparatus and method for assisting cold start of an engine
  • Apparatus and method for assisting cold start of an engine
  • Apparatus and method for assisting cold start of an engine

Examples

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Embodiment Construction

[0010] figure 1 A schematic diagram representing a device (100) for assisting a cold start of an engine (101) in a vehicle according to an embodiment of the invention is shown.

[0011] A device (100) for assisting a cold start of an engine (101) comprises a carbon canister (103) adapted to collect fuel vapors from a fuel tank (102). The purge valve (105) is adapted to supply air from the environment to the air intake path (106). Air supplied to the engine (101) when the purge valve (105) is open flows through the canister (103) to purge collected fuel vapors. During cold start conditions, the control unit (107) is adapted to operate the purge valve (105) to supply an additional air quantity and additional fuel in the form of fuel vapor cleaned from said canister (103). The purge valve (105) operates as a choke to aid in cold starting of the vehicle, thereby eliminating the need for a separate choke or an additional electronic valve.

[0012] figure 2 A flow chart represe...

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PUM

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Abstract

The invention relates to an apparatus and method for assisting the cold start of an engine, and more particularly to a method for assisting a vehicle engine (101) during cold start conditions. The method comprising the steps of: detecting at least one engine operating parameter to determine a current state of engine operation under cold start conditions; operating a purge valve (105) to supply the required amount of additional air during the cold start conditions; and using a fuel vapor auxiliary fuel supply cleaned from a canister (103) during the cold start conditions.

Description

technical field [0001] The present invention relates to apparatus and methods for engine control. In particular, the present invention relates to apparatus and methods for assisting engine operation during cold start conditions. Background technique [0002] In today's vehicles, spark ignition engines need to be manually assisted with a mixture of extra air and a surplus of fuel during cold start conditions. Typically, in electronically fuel injected engines, this is done with an idle actuator in the system or, in engines with electronic throttle control, opening more of the throttle. Both of these solutions increase system cost. Another method is to use a device known as a mechanically operated choke. In such devices, if the user does not disengage the mechanism, there is the possibility of running the engine on a surplus of fuel, even in hot engine operating conditions. This will result in unnecessary fuel consumption, thereby increasing operating costs. [0003] For ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N19/00F02M25/08
CPCF02M25/08F02N19/00F02N2019/002
Inventor R.普拉德普P.雷德姆雷迪V.卡鲁派亚
Owner ROBERT BOSCH GMBH