摘要:
A plurality of spark electrodes are disposed in an arc shape on the surface or so as to be projected from the surface of an insulating member formed on a part of the wall face of a combustion chamber, and are formed so as to be in series electrically via discharging gaps.A spark plug is provided integrally with an injector, and the spark plug and the ignition coil are integrated. The three members are constructed as an integral unit, thereby improving installability to an engine.
摘要:
A fuel injector employed in a direct injection engine comprising a spark plug arranged on the top of a combustion chamber, a fuel injector located on said combustion chamber and an intake air control means installed on an intake manifold. A forward tumble air flow is formed in the combustion chamber by the intake air control means, and the fuel injector is available in two types; an annular (conical) spray type characterized by uniform density and a spray type characterized by high/low density. In the case of latter type, arrangement is made to ensure that the denser portion is placed face-to-face with the spark plug. Spray fuel rises along the wall surface of the combustion chamber on the intake side, and is carried to the spark plug by forward tumble air flow (called “tumble guide”) moving from the fuel injector to the spark plug. This allows stratified charge combustion to be performed in the operation range from low to high speed ranges, with the result that discharge of gas containing hazardous gas component such as THC is reduced and fuel economy is improved.
摘要:
A combustion chamber is formed using a flat piston having a low cooling loss and therein a forward tumble is generated. A fuel spray is formed by a provision of a splitter which is provided to make off-set from a center of an injection port at a tip end of a tumble atomization system fuel injector. The fuel spray is divided into a fuel spray having a strong penetration force and a fuel spray having a small penetration force. The fuel spray having the strong penetration force is injected in a vicinity of an ignition plug. Accordingly, a fuel adhesion to the piston can be reduced and further a reduction of a discharge HC and a fuel consumption can be improved.
摘要:
A direct injection engine capable of direct injection of fuel into a combustion chamber characterized in that discharge of gas containing hazardous gas component such as HC can be reduced and fuel economy can be improved by stratified charge combustion in the operation range of low to high speeds. Spray fuel from the fuel injector is fed to the ignition plug by tumble air flow generated in the combustion chamber and formed between the fuel injector located on the side of the combustion chamber and the ignition plug installed on the top of the combustion chamber. This engine (a tumble guide direct injection engine) is configured to ensure that fuel reaches the ignition plug at the time of its ignition.
摘要:
The objects of the present invention are to provide a high-accuracy EGR sensor, and EGR system which adopts the above sensor to measure EGR rate. The gas flow meter comprises a sensor section for measuring fluid flow rate and controller for controlling signals transmitted into and out of the sensor section, and is controlled at a working temperature of 350 to 700° C., wherein a protective coat formed on the sensor section has resistance to temperature at which deposition of a PM component in exhaust gases can be prevented.
摘要:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking.
摘要:
The present invention is intended to provide a control system for an direct injection internal combustion engine capable of effectively reducing the amounts of both HC and NOx exhausted from a combustion chamber during a period from the start of the engine operation to the stop of the engine operation. It comprises an external EGR passage (11) for returning a part of exhaust gas from an exhaust pipe (10) to an intake pipe (5), an external EGR control valve (12) for controlling an amount of exhaust gas returned to the external EGR passage (11), and a valve timing varying mechanism (9A, 9B) for varying timing of opening and closing at least one of an intake valve and an exhaust valve. An ECU 100 controls the valve timing varying mechanism (9A, 9B) to always return internal EGR gas in an operation region where exhaust gas recirculation is required, and controls the external EGR control valve (12) to return exhaust gas in a combination of internal EGR and external EGR when an internal EGR rate provided by the valve timing varying mechanism (9A, 9B) is not sufficient to satisfy an EGR rate demanded depending on an operation state.
摘要:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking.
摘要:
The objects of the present invention are to provide a high-accuracy EGR sensor, and EGR system which adopts the above sensor to measure EGR rate. The gas flow meter comprises a sensor section for measuring fluid flow rate and controller for controlling signals transmitted into and out of the sensor section, and is controlled at a working temperature of 350 to 700° C., wherein a protective coat formed on the sensor section has resistance to temperature at which deposition of a PM component in exhaust gases can be prevented.
摘要:
The amount of air to be introduced is controlled for each cylinder, whereby it is intended to make it possible to control the torque generated in each cylinder, perform an ultra-lean burn operation, purify the exhaust gas, and increase the output of an engine. An air flow control valve adapted to be on-off controlled in accordance with an operated quantity of an accelerator pedal is disposed in each branch pipe or intake port. The air flow control valve may be a throttle valve disposed in each branch pipe or it may be a variable intake valve for opening and closing the intake port.