Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A pilot injection control system including a variable-capacity chamber having communication with a pump chamber via a port which is opened or closed in a predetermined lift position in the compression course of a plunger for compressing said pump chamber, so that a pilot injection is executed by controlling the capacity of said variable-capacity chamber at a predetermining timing in the open period of said port, comprising: open/close timing detecting means for detecting the open/close timing of said port in a previous injection; and pilot injection timing determining means for determining said predetermined timing in response to a signal coming from said open/close timing detecting means.
Claim 2
Dependent Claim
51 words
A pilot injection control system as set forth in Claim 1, wherein said pilot injection timing determining means includes period determining means for computing a predetermined period for executing said pilot injection by using said port open/close timing, which is detected by said open/close timing detecting means, as a starting point.
Claim 3
Dependent Claim
28 words
A pilot injection control system as set forth in Claim 2, wherein said period determining means determines said predetermined period by using an engine r.p.m. as a parameter.
Claim 4
Dependent Claim
30 words
A pilot injection control system as set forth in Claim 1, wherein said pilot injection control system controls the capacity of said variable-capacity chamber by means of a permeable actuator.
Claim 5
Dependent Claim
33 words
A pilot injection control system as set forth in Claim 4, wherein said open/close timing detecting means detects said port open/close timing on the basis of a voltage generated by said permeable actuator.
Claim 6
Dependent Claim
40 words
A pilot injection control system as set forth in Claim 5, wherein said open/close timing detecting means detects the timing, at which the voltage generated by said permeable actuator drops to a predetermined voltage value, as said port open/close timing.
Claim 7
Dependent Claim
49 words
A pilot injection control system as set forth in Claim 6, wherein said predetermined voltage value is set to a level which is lower by a predetermined voltage than the voltage value of said permeable actuator while said pump chamber and said variable-capacity chamber are blocked from each other.
Claim 8
Dependent Claim
36 words
A pilot injection control system as set forth in Claim 6, wherein the voltage value of said permeable actuator while said pump chamber and said variable-capacity chamber are blocked is set to a constant voltage value.
Claim 9
Dependent Claim
74 words
A pilot injection control system as set forth in Claim 4, further comprising pilot injection means for executing the pilot injection by driving said permeable actuator when the pressure in said pump chamber reaches a predetermined value for the open period of said port in the injection of this time, so that said pilot injection means may be actuated in place of said pilot injection timing determining means in accordance with the running condition.
Claim 10
Dependent Claim
39 words
A pilot injection control system as set forth in Claim 5, wherein said open/close timing detecting means detects said port open/close timing on the basis of a differentiated waveform of the voltage which is generated by said permeable actuator.