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Engine control system

A control system and engine technology, applied in the direction of engine control, combustion engine, machine/engine, etc., can solve the problems such as easy generation of fuel vapor, achieve the effect of stable fuel injection amount and low-cost structure

Active Publication Date: 2010-12-22
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, although the excess fuel will return to the fuel tank through the pressure regulator, there is a problem that the fuel in a high temperature state will return to the fuel tank, and it is easy to generate fuel vapor

Method used

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  • Engine control system
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Experimental program
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Embodiment approach 1

[0032] figure 1 It is a schematic overall configuration diagram of the engine control system according to Embodiment 1 of the present invention. figure 1 In the control unit 1, a program or map for controlling the operation of the entire engine is stored, a throttle position sensor 3 that measures the opening of the throttle valve 2, an engine temperature sensor 4 that measures the wall temperature of the engine, and a The crank angle sensor 5 that measures the crank position or calculates the engine rotation speed, and the intake air temperature sensor 10 that measures the temperature of the intake air (see figure 2 ) And other various sensor information, calculate the appropriate fuel injection timing and fuel injection amount, and output a drive signal to the fuel injection valve 9 that is the fuel injection device. In addition, similarly, an ignition signal is output to an ignition coil (not shown) based on information from various sensors at an appropriate time, and a spark...

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Abstract

The invention provides an engine control system which, with a cheap structure, achieves the stabilization of the fuel pressure and the fuel injection amount. The engine control system comprises a fuel injection amount calculation unit (100), a fuel discharge amount calculation unit (200) and a target fuel pump motor rotating speed calculation unit (300), wherein the fuel injection amount calculation unit (100) calculates the fuel injection amount based on the output of a sensor which detects the operating state of an engine, the fuel discharge amount calculation unit (200) calculates the fueldischarge amount of a fuel pump according to the fuel injection amount and the rotating speed of the engine, and the target fuel pump motor rotating speed calculation unit (300) calculates target fuel pump motor rotating speed of a fuel pump motor on the basis of the fuel discharge amount. The fuel discharge amount calculation unit (200) comprises a fuel pump motor rotating speed correction unit,which, according to the throttling opening variance of a throttle valve output by a throttling position sensor (3), corrects the target fuel pump motor rotating speed of the fuel pump motor when the throttling opening variance is above or below the specific value.

Description

Technical field [0001] The invention relates to an engine control system, in particular to the control technology of a fuel pump of the engine control system. Background technique [0002] In the conventional engine control system, there is known a system including: a fuel pump that supplies fuel drawn from a fuel tank to a fuel injection valve that injects to the engine; a pressure regulator that will The pressure of the fuel discharged from the fuel pump (hereinafter referred to as fuel pressure) is adjusted to a predetermined pressure; and an engine control unit that controls various actuators such as the fuel pump in accordance with the operating state of the engine. [0003] In this kind of engine control system, the fuel pump is always driven and the fuel is discharged from the fuel pump, and the remaining fuel is returned to the fuel tank with a pressure regulator, so that fuel with a constant fuel pressure can be supplied to the fuel injection valve. [0004] For the fuel pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/04
CPCY02T10/123Y02T10/12
Inventor 友松允令高桥康弘
Owner MITSUBISHI ELECTRIC CORP