JPH0214865U

JPH0214865U -

Info

Publication number: JPH0214865U
Application number: JP9147488U
Authority: JP
Priority date: 1988-07-12
Filing date: 1988-07-12
Publication date: 1990-01-30

Description

[Brief explanation of the drawing]

第１図はソレノイド駆動回路、第２図はエンジ
ンシヤツトダウン回路、第３図はシヤツトダウン
リレー近傍の詳細図、第４図は本考案のソレノイ
ド駆動回路及びエンジンシヤツトダウン回路をま
とめた実施態様を示す。図において；１……前信指令信号、２……後進
指令信号、３……ニユートラル指令信号、４……
シートスイツチ、５……論理回路、６……論理回
路、７……前進側ソレノイド、８……後進側ソレ
ノイド、９……後進側クラツチ圧力検出スイツチ
、１０……前進側クラツチ圧力検出スイツチ、１
１〜１５……論理回路、１６……デイレー回路、
１７……シヤフトダウンリレー、１８……エンジ
ン点火回路、１９……イグニツシヨンスイツチ、
２１……シートスイツチ、２２……リレー、２３
……前進スイツチ、２４……後進スイツチ、２５
……リレー、２６……リレー、２７……リレー、
２８……ソレノイドコイル、２９……ソレノイド
コイル、３０……リレー、３１……リレー、３２
……後進側油圧スイツチ、３３……前進側油圧ス
イツチ、３４……シヤツトダウンリレー。 Fig. 1 shows the solenoid drive circuit, Fig. 2 shows the engine shutdown circuit, Fig. 3 shows a detailed view of the vicinity of the shutdown relay, and Fig. 4 shows an embodiment of the solenoid drive circuit and engine shutdown circuit of the present invention. show. In the figure: 1... Forward command signal, 2... Reverse command signal, 3... Neutral command signal, 4...
Seat switch, 5...Logic circuit, 6...Logic circuit, 7...Forward side solenoid, 8...Reverse side solenoid, 9...Reverse side clutch pressure detection switch, 10...Forward side clutch pressure detection switch, 1
1 to 15...logic circuit, 16...delay circuit,
17...Shaft down relay, 18...Engine ignition circuit, 19...Ignition switch,
21...Seat switch, 22...Relay, 23
...Forward switch, 24...Reverse switch, 25
...Relay, 26...Relay, 27...Relay,
28... Solenoid coil, 29... Solenoid coil, 30... Relay, 31... Relay, 32
... Reverse hydraulic switch, 33... Forward hydraulic switch, 34... Shutdown relay.

Claims

[Scope of Claim for Utility Model Registration] (1) A forward/reverse switch and a neutral switch in the forward/reverse shift lever section, or only a forward/reverse switch, and a seat switch are used as input, and when the seat switch is ON, either the forward/reverse switch is activated. A forward/reverse solenoid drive circuit for an automatic transmission for an industrial vehicle, characterized in that a forward/reverse solenoid is turned on only when the solenoid is turned on. (2) Using the forward/reverse and neutral command signals made up of the forward/reverse switch and relay, etc. as well as the signal that detects the spool sticking in the solenoid valve installed on the transmission side, the forward (reverse) or neutral A forward/reverse solenoid drive circuit for an automatic transmission for an industrial vehicle, comprising an engine shutdown circuit that stops the engine if the reverse (forward) spool is stuck at the time of a command. . (3) The industrial vehicle according to claim (2), characterized in that the means for detecting the spool sticking is a pressure switch that detects clutch pressure in forward and backward movement, or a proximity switch that turns ON/OFF according to displacement of the spool. Automatic transmission forward/reverse solenoid drive circuit.