Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
252 words
An injection valve arrangement for injecting a pressure medium into a combustion chamber of a cylinder in an internal combustion engine, whereby the pressure medium is an additional medium for reducing the contents of noxious substances resulting from combustion of fuel in the combustion chamber; the arrangement comprising a valve body part (2) including a first chamber (4), a feed duct (8,8a) for feeding said additional medium continuously to the first chamber (4), at least one nozzle orifice (5a,5b) leading from the first chamber (4) for injecting the additional medium into the combustion chamber of the cylinder, and an injection valve (3) for controlling the feeding of the additional medium from said first chamber (4) into the combustion chamber, the injection valve (3) having an elongate valve member (6) which is spring-loaded (7) towards a closing position in which injection of the additional medium is prevented, characterised in that the arrangement further includes a second chamber (12), feed means (8b) for feeding said additional medium to the second chamber (12) so that the pressure prevailing in the latter urges the valve member (6) towards said closing position, and a control valve (15) associated with said second chamber (12) and arranged to control the pressure in said second chamber (12) so that movement of the control valve (15) to an open position causes the pressure to fall in the second chamber (12) so that the valve member (6) is moved from its closing position into a position allowing injection of the additional medium.
Claim 2
Dependent Claim
42 words
An injection valve arrangement according to claim 1, characterised in that the feed means (8b) includes a first throttled aperture (13) and in that the second chamber (12) is connected to the said control valve (15) through a second throttled aperture (14).
Claim 3
Dependent Claim
40 words
An injection valve arrangement according to claim 2, characterised in that the minimum cross-sectional area of the second throttled aperture (14) is substantially larger, preferably approximately five times larger, than the minimum cross-sectional area of the first throttled aperture (12).
Claim 4
Dependent Claim
40 words
An injection valve arrangement according to any of the preceding claims, characterised in that pressure control means (11) is arranged upstream of said feed duct for controlling the feeding of said additional medium into said first and second chambers (4,12).
Claim 5
Dependent Claim
19 words
An injection valve arrangement according to any of the preceding claims, characterised in that the additional medium is water.
Claim 6
Dependent Claim
51 words
An injection valve arrangement according to any of the preceding claims, characterised in that the control valve (15) is located in a third chamber (16), which is provided with a drain passage (22) for the additional medium, and in that the control valve (15) is spring-loaded (17) towards a closed position.
Claim 7
Dependent Claim
45 words
An injection valve arrangement according to any of the preceding claims, characterised in that the control valve (15) is a solenoid valve which is controlled from an electronic control unit (19) by electric control signals (20) which are dependent on the operation of the engine.
Claim 8
Dependent Claim
61 words
An injection valve arrangement according to any of the preceding claims, characterised in that the valve body part (2) further includes a fuel injection valve (23) having nozzle orifices (24) which are arranged in a manner known per se at different levels in the axial direction of the cylinder to the nozzle orifices (5a,5b) of the said additional medium valve (3).
Claim 9
Dependent Claim
17 words
An internal combustion engine provided with an injection valve arrangement according to any of the preceding claims.
Claim 10
Dependent Claim
18 words
An internal combustion engine according to claim 9, characterised in that the engine is a large diesel engine.