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Method for managing piston pump for heat engine

A heat engine and piston technology, applied in the direction of engine components, engine control, engine parameters, etc., can solve problems such as long duration

Active Publication Date: 2021-08-24
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In particular, during the start-up phase of the vehicle, during which the pump is running to pressurize the fuel but the heat engine has not yet started, the noise of the pump becomes especially audible, especially for those inside the vehicle, since the sound level of the engine is zero. or people around the vehicle, which presents a disadvantage
Furthermore, since the duration of this phase can be relatively long, noise disturbances remain audible for a considerable period of time, thus presenting a major disadvantage

Method used

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  • Method for managing piston pump for heat engine
  • Method for managing piston pump for heat engine
  • Method for managing piston pump for heat engine

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Embodiment Construction

[0032] The method according to the invention is intended to be implemented in a vehicle with a heat engine in order to control a piston pump of said vehicle. The term "vehicle" means in particular motor vehicles and motorcycles (especially motor vehicles with a cylinder capacity of less than 125 cm 3 vehicles), but also devices with small cylinder capacity heat engines, such as lawnmowers.

[0033] figure 1 An example of a vehicle 1 comprising a pump 10 with a piston 110 and a computer 20 for controlling the pump 10 is schematically shown.

[0034] Vehicle 1 , such as a motorcycle or a lawnmower, includes a heat engine (not shown) supplied with fuel C from a fuel tank (not shown). A heat engine comprises a plurality of cylinders, each delimiting a combustion chamber into which, during each cycle of the engine, a volume of fuel C and a volume of air are introduced in order to effect the combustion of their mixture.

[0035] Each cylinder includes a piston mounted in a combus...

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Abstract

The present invention relates to a method for the management of a piston (110) pump (10) by a computer (20) of a vehicle (1), the pump (10) comprising a guide (120), a piston (110) mounted with the ability to slide in the guide (120), and a solenoid (130) designed to move the piston (110), said method comprising, as long as the pressure of fuel (C) in the compression chamber of the pump (10) is below a predetermined pressure threshold, a step of the computer (20) controlling the solenoid (130) to move the piston (110) as far as its raised position, and a step of the computer (20) detecting that the predetermined pressure threshold has been crossed when the value of the current, measured at the end of a predetermined duration, is greater than or equal to a predetermined reference value so as to stop the control of the solenoid (130) by the computer (20).

Description

technical field [0001] The invention relates to the field of fuel injection into heat engines, and more particularly to methods for managing fuel injection pumps. The invention is more particularly applicable to heat engines with small cylinder capacities, for example cylinder capacities less than 125 cm 3 motorcycle engine or lawn mower engine. Background technique [0002] It is known to use a pump to inject fuel into the cylinders of a heat engine. In the case of engines with small cylinder capacities, e.g. cylinder capacities less than 125 cm 3 Motorcycle or lawnmower engines known to use piston pumps or turbo pumps to pressurize the fuel to be injected. In the case of a turbo pump, the turbine is driven into rotation by an electric motor. In the case of a piston pump, the fuel is pressurized by the actuation of the piston. In both cases, the valve is mounted after the pump and is actuated by a spring whose stiffness allows the valve to open when fuel pressure excee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30F02M37/08F02M59/02F02M59/10F04B17/04F04B49/02F04B49/06F04B49/08F02D41/06F04B53/00
CPCF02D41/3082F02D41/062F02M37/08F02M59/025F02M59/10F04B49/06F04B49/08F04B49/022F04B2203/0401F04B17/04F02M51/04F02M2037/085F04B49/065
Inventor X·穆瓦纳
Owner VTESCO TECH GMBH