KR970075259A

KR970075259A - Direct injection gasoline engines of vehicles

Info

Publication number: KR970075259A
Application number: KR1019960014810A
Authority: KR
Inventors: 이용균
Original assignee: 김영귀; 기아자동차 주식회사
Priority date: 1996-05-07
Filing date: 1996-05-07
Publication date: 1997-12-10

Abstract

본 발명은 차량의 직접 분사식 가솔린 엔진에 관한 것으로, 연료분사 인젝터를 연소실내의 실린더 헤드내에 설치하고, 실린더에는 퓨얼 캡처 피스톤을 장착하며, 배기 다기관에 광역 공연비센서를 장착하여 연소실의 연료분포를 성층화하고, 엔진부하에 따른 연료분사시기와 이론 공연비와 희박공연비를 절환할 수 있도록 한 차량의 직접 분사식 가솔린 엔진에 관한 것이다.The present invention relates to a direct injection type gasoline engine of a vehicle, in which a fuel injection injector is installed in a cylinder head of a combustion chamber, a fuel capture piston is mounted on the cylinder, and a wide area air-fuel ratio sensor is mounted on the exhaust manifold, And a fuel injection timing according to an engine load, a stoichiometric air-fuel ratio and a lean air-fuel ratio can be switched.

본 발명은 예시도면 제3도 내지 제6도와 같이, 본 발명은 흡기밸브(40)와 배기 밸브(42)사이의 실린더 헤드(44')에 인젝터(20)를 설치하여 연소실내로 직접 연료분사되게 하고, 피스톤헤드 상면에 걸림턱(46)와 원형의 1단홈(48)과 2단홈(50)이 형성된 퓨얼 캡처 피스톤(52)을 실린더(36)내에 설치하여 성층연소를 가능케하며, 배기 다기관(30)내에 광역 공연비센서(54)를 설치하여 ECU(18')와 회로 연결시킴으로서 부하시에 따른 공연비를 절환할 수 있도록 구성된 차량의 직접 분사식 가솔린 엔진이다.The present invention is characterized in that the injector 20 is installed in the cylinder head 44 'between the intake valve 40 and the exhaust valve 42 to inject fuel directly into the combustion chamber And a fuel capture piston (52) having a locking step (46), a circular first groove (48) and a second groove (50) formed on the upper surface of the piston head is installed in the cylinder (36) to enable stratified combustion, Is a direct injection type gasoline engine of a vehicle which is configured to provide a wide air-fuel ratio sensor (54) in a fuel injector (30) and to be connected to the ECU (18 ') so as to switch the air-

따라서, 본 발명은 혼합기를 성층화하여 실화를 방지케하고, 저부하시에는 압축 행정중의 지연분사로 희박연소를 가능케하여 연비가 향상되는 효과와, 고부하시에는 흡입행정중의 조기분사로 이론 공연비운전을 실시토록하여 양호한 출력위주의 엔진상태가 유지되고, 배기가스가 저감되는 효과가 있다.Therefore, it is an object of the present invention to provide an air-fuel ratio control apparatus and an air-fuel ratio control method for controlling an air-fuel ratio So that a good output-oriented engine state is maintained and the exhaust gas is reduced.

Description

Direct injection gasoline engines of vehicles

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 종래 간접 분사식 가솔린 엔진의 연료분사 장치를 나타낸 예시도, 제2도는 제1도에 사용되는 종래 피스톤을 보인 예시도.FIG. 1 is an illustration showing a fuel injection device of a conventional indirect injection type gasoline engine, FIG. 2 is an example of a conventional piston used in FIG.

Claims

The injector 20 is installed in the cylinder head 44 'between the intake valve 40 and the exhaust valve 42 so as to inject fuel directly into the combustion chamber and the engagement head 46 and the circular first stage Fuel ratio sensor 54 is installed in the exhaust manifold 30 to allow the ECU 18 'to control the engine 18' by installing a fuel capture piston 52 with a two- And the air-fuel ratio according to the time of the load can be switched by connecting the circuit with the circuit.

※ Note: It is disclosed by the contents of the first application.