TECHNICAL FIELD
[0001] The present invention relates to fuel injectors used for spraying fuel into the combustion
chamber in internal combustion engines, and relates to engine blocks whereon said
injectors are placed.
PRIOR ART
[0002] Fuel injectors in general provide spraying fuel with desired intervals into the combustion
chamber in internal combustion engines.
[0003] The fuel, which passes in a controlled manner through the valve region defined inside
fuel injectors, passes through the spray pipe extending inside the engine block, and
it arrives at the spray tip opened to the combustion chamber provided in the engine,
and it is sprayed into the combustion chamber. The acidic gases, formed as a result
of the explosions which occur in the combustion chamber, enter between the spray pipe
and the engine block, and they lead to corrosion outside of the spray pipe, in other
words, they lead to corrosion in the fuel injector.
[0004] WO 02/097259 A1 discloses a fuel injector mounted in a bore in the intake manifold and heated by
exhaust gas from the exhaust system, the exhaust gas flowing around the injector tip
mounted in its bore and being returned to the exhaust system, the exhaust gas heating
the injector in order to enhance fuel evaporation after injection.
[0005] As a result, because of all of the abovementioned problems, an improvement is required
in the related technical field.
BRIEF DESCRIPTION OF THE INVENTION
[0006] The present invention relates to an engine block, for eliminating the above mentioned
disadvantages and for bringing new advantages to the related technical field.
[0007] The main object of the present invention is to provide an engine block where corrosion
between the spray pipe of the fuel injector and the engine block is prevented.
[0008] In order to realize all of the abovementioned objects and the objects which are to
be deducted from the detailed description below, the present invention as defined
in claim 1 relates to an engine block where a fuel injector having at least one spray
pipe is fixed, in order to be used for providing spraying of fuel into the combustion
chamber in a controlled manner in internal combustion engines. Accordingly, said engine
block comprises at least one channel wherein hot exhaust gases circulate in order
to increase the temperature in the vicinity of said spray pipe. Thus, when desired,
hot exhaust gases are transferred into the channel and thus, the periphery of the
spray pipe is heated. By means of this, condensation and corrosion formation at the
periphery of the spray pipe is prevented.
[0009] According to the invention, the channel at least partially surrounds the spray pipe
and is connected to the exhaust system of the internal combustion engine. Thus, the
spray pipe is heated along the periphery thereof.
[0010] In a preferred embodiment of the subject matter invention, there is at least one
temperature sensor connected to the spray pipe.
[0011] In a preferred embodiment of the subject matter invention, there is at least one
control unit connected to the temperature sensor. Thus, when the temperature around
the spray pipe decreases below a pre-calculated value, hot exhaust gases are transferred
to the channel. In another embodiment, when the load applied to the motor is reduced,
it is expected that the temperature will decrease, and the control unit provides transfer
of hot exhaust gases to the channel.
[0012] In a preferred embodiment of the subject matter invention, the spray pipe is positioned
in an opening provided on the engine block.
BRIEF DESCRIPTION OF THE FIGURES
[0013] In Figure 1, a representative view of the subject matter engine block and of the
fuel injector provided on said engine block is given.
REFERENCE NUMBERS
[0014]
- 10
- Fuel injector
- 20
- Injector body
21 Valve element
22 Spray pipe
23 Spray tip
24 Fuel channel
- 30
- Engine block
31 Opening
32 Combustion chamber
33 Channel
- 40
- Temperature sensor
- 50
- Critical region
- 60
- Control unit
THE DETAILED DESCRIPTION OF THE INVENTION
[0015] In this detailed description, the subject matter fuel injector (10) is explained
with references to examples without forming any restrictive effect only in order to
make the subject more understandable.
[0016] As can be seen in Figure 1, the subject matter fuel injector (10) comprises an injector
body (20) wherein the valve elements (21) are positioned. There is at least one spray
pipe (22) extending outwardly from said injector body (20). The tip of said spray
pipe (22) is defined as a spray tip (23). There is at least one fuel channel (24)
extending through the injector body (20) towards the spray tip (23). The fuel, which
is transferred to the fuel channel (24) under the control of the valve elements (21)
inside the injector body (20), advances along the spray pipe (22), and it passes through
the spray tip (23), and it exits the fuel injector (10).
[0017] In order to provide reaching of the fuel, exiting the fuel injector (10), at the
combustion chamber (32) formed inside the engine block (30), the fuel injector (10)
is fixed to at least one opening (31) provided on the engine block (30). On the engine
block (30), there is at least one channel (33) provided in the vicinity of the fuel
injector (10). Said channel (33) at least partially surrounds the periphery of the
fuel injector (10). The channel (33) is connected to the exhaust system (not illustrated
in the figures) of the engine. In other words, the hot gases formed after combustion
in the combustion chamber (32) can be transferred into the channel (33) when desired.
Moreover, there is at least one temperature sensor (40) which measures the temperature
of the critical region (50) defined between the spray pipe (22) and the wall of the
opening (31) provided on the engine block (30). Said temperature sensor (40) transfers
the measurement values to a control unit (60).
[0018] In said embodiment, the fuel, exiting the spray tip (23), reaches the combustion
chamber (32). The gases formed after the explosions occurring in the combustion chamber
(32) try to enter into the critical region (50) defined between the engine block (30)
and the spray pipe (22). The gases, which enter between the spray pipe (22) and the
engine block (30), condense in cases where the engine operates under low load and
cools, and said gases may lead to corrosion in the critical region (50). In order
to prevent said corrosion, the hot exhaust gases formed in the combustion chamber
(32) are transferred into the channels (33), and the periphery of the critical region
(50) is heated. Thus, condensation and thereby corrosion are prevented. The control
unit (60) can provide transfer of the hot gases into the channel (33) depending on
the measured temperature value. In an alternative embodiment, the control unit (60)
checks the amount of load applied to the motor, and it can provide transfer of hot
exhaust gases to the channel (33) in case of low loads. By means of said embodiment,
the critical region (50) is heated without needing additional energy, and thereby
corrosion is prevented.
[0019] The protection scope of the present invention is set forth in the annexed Claims
and cannot be restricted to the illustrative disclosures given above, under the detailed
description. It is because a person skilled in the relevant art can obviously produce
similar embodiments under the light of the foregoing disclosures, without departing
from the main principles of the present invention. The scope of the invention is defined
by the appended claims.
1. An engine block (3) where a fuel injector (10) having at least one spray pipe (22)
is fixed, in order to be used for providing spraying offuel into the combustion chamber
(32) in a controlled manner in internal combustion engines, characterized in that said engine block (30) comprises at least one channel (33) at least partially surrounding
said spray pipe (22) and being connected to the exhaust system of the internal combustion
engine, wherein hot exhaust gases circulate in order to increase the temperature in
a critical region (50) defined between the engine block (30) and said spray pipe (22).
2. An engine block (30) according to claim 1, characterized by comprising at least one temperature sensor (40) assigned to said critical region
(50) connected to the spray pipe (22).
3. An engine block (30) according to claim 2, characterized by comprising at least one control unit (60) connected to the temperature sensor(40).
4. An engine block (30) according to claim 1, characterized in that the spray pipe (22) is positioned in an opening (31) provided on the engine block
(30).
1. Motorblock (3), an dem ein Kraftstoffinjektor (10) mit mindestens einem Spritzrohr
(22) befestigt ist, um zur Bereitstellung des Einspritzens von Kraftstoff in die Brennkammer
(32) auf eine gesteuerte Weise in Brennkraftmaschinen verwendet zu werden, dadurch gekennzeichnet, dass der Motorblock (30) mindestens einen Kanal (33) umfasst, der das Spritzrohr (22)
zumindest teilweise umgibt und mit dem Auslasssystem der Brennkraftmaschine verbunden
ist, in dem heiße Abgase zirkulieren, um die Temperatur in einem kritischen Bereich
(50), der zwischen dem Motorblock (30) und dem Spritzrohr (22) definiert ist, zu erhöhen.
2. Motorblock (30) nach Anspruch 1, dadurch gekennzeichnet, dass er mindestens einen Temperatursensor (40) umfasst, der dem kritischen Bereich (50)
zugeordnet und mit dem Spritzrohr (22) verbunden ist.
3. Motorblock (30) nach Anspruch 2, dadurch gekennzeichnet, dass er mindestens eine Steuereinheit (60) umfasst, die mit dem Temperatursensor (40)
verbunden ist.
4. Motorblock (30) nach Anspruch 1, dadurch gekennzeichnet, dass das Spritzrohr (22) in einer am Motorblock (30) vorgesehenen Öffnung (31) positioniert
ist.
1. Bloc moteur (3), dans lequel est fixé un injecteur de carburant (10) ayant au moins
un conduit de pulvérisation (22), devant être utilisé pour assurer la pulvérisation
de carburant dans la chambre de combustion (32) de manière contrôlée dans des moteurs
à combustion interne, caractérisé en ce que ledit bloc moteur (30) comprend au moins un canal (33) entourant au moins en partie
ledit conduit de pulvérisation (22) et étant connecté au système d'échappement du
moteur à combustion interne dans lequel les gaz d'échappement chauds circulent afin
d'augmenter la température dans une région critique (50) définie entre le bloc moteur
(30) et ledit conduit de pulvérisation (22).
2. Bloc moteur (30) selon la revendication 1, caractérisé en ce qu'il comprend au moins un capteur de température (40) affecté à ladite région critique
(50) connectée au conduit de pulvérisation (22).
3. Bloc moteur (30) selon la revendication 2, caractérisé en ce qu'il comprend au moins une unité de commande (60) connectée au capteur de température
(40).
4. Bloc moteur (30) selon la revendication 1, caractérisé en ce que le conduit de pulvérisation (22) est positionné dans une ouverture (31) prévue sur
le bloc moteur (30).