EP 0280188 B1 19911106 - CONTROL DEVICE FOR A DIESEL ENGINE
Title (en)
CONTROL DEVICE FOR A DIESEL ENGINE
Publication
Application
Priority
DE 3705972 A 19870225
Abstract (en)
[origin: US4903670A] A diesel internal combustion engine 1 has an air intake 2, an injection pump 3 and an exhaust pipe 4. In the fuel injection line 7 is arranged an electromagnetic shut-off valve 8, which closes the fuel supply when the "ignition" switch 10 is turned off, in order to bring the engine 1 to an immediate halt. In the exhaust pipe 4 is arranged a lambda lean probe 12, which feeds to a comparator electronics system 14 a signal corresponding to the oxygen content of the exhaust gas; this signal is compared in the comparator circuit with a lambda nominal value. If an excess quantity of fuel has been injected, for example, due to a fault in the injection system the value detected by the lambda probe 12 will fail to reach the nominal value, whereupon the comparator electronic system 14 activates a switch 15 in the control line 9 of the shut-off valve 8. The current supply to the shut-off valve 8 is interrupted and the fuel supply to the engine 1 is shut off. In this way unintentional acceleration of the engine as a result of faulty injection of an excess quantity of fuel, is prevented.
IPC 1-7
IPC 8 full level
F02D 41/04 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02D 41/38 (2006.01); F02D 41/40 (2006.01); F02D 45/00 (2006.01); F02B 3/06 (2006.01)
CPC (source: EP US)
F02D 41/042 (2013.01 - EP US); F02D 41/1475 (2013.01 - EP US); F02D 41/22 (2013.01 - EP US); F02D 41/38 (2013.01 - EP US); F02B 3/06 (2013.01 - EP US); F02D 2041/226 (2013.01 - EP US); F02D 2250/32 (2013.01 - EP US)
Citation (examination)
EP 0152870 A2 19850828 - BBC BROWN BOVERI & CIE [CH]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0280188 A2 19880831; EP 0280188 A3 19881221; EP 0280188 B1 19911106; DE 3705972 A1 19880908; DE 3865983 D1 19911212; JP 2617971 B2 19970611; JP S63227939 A 19880922; US 4903670 A 19900227
DOCDB simple family (application)
EP 88102346 A 19880218; DE 3705972 A 19870225; DE 3865983 T 19880218; JP 4323788 A 19880225; US 15906588 A 19880223