Engine exhaust brake controlled by transmission and accelerator
AssigneeAisin Seiki Kabushiki Kaisha
InventorKazuo Ishikawa
Life of this patent
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Abstract
An improved internal combustion engine exhaust brake control device for use in conjunction with an automatic transmission, of the type in which the actuation of manual and throttle-connected switches energize a valve retarding the engine exhaust gas flow and creating back pressure which imparts a braking action on the engine, wherein the improvement comprises a switching device actuated by the manual down-shifting of the transmission that, in conjunction with actuation of the throttle-connected switch, automatically activates the exhaust brake device.
Claims3
An improved internal combustion engine exhaust brake control device for use in conjunction with an automatic transmission, of the type in which a manually actuated switch in series with a throttle switch electrically activates an exhaust brake, the improvement comprising switch means electrically connected in parallel with the manual switch and in series with the throttle switch for automatically energizing the exhaust brake on manually down-shifting the automatic transmission and on release of the throttle setting.
An improved exhaust brake control device for use in conjunction with an automatic transmission of the type in which a manually actuated switch in series with an accelerator switch cooperate to electrically activate a solenoid which causes vacuum-actuation of a valve in the exhaust stage of an internal combustion engine retarding exhaust gas flow and creating exhaust gas back pressure, the back pressure imparting braking action to the piston of the engine, wherein the improvement comprises;
- a pressure-actuated switch connected in parallel with said manually actuated switch and in series with said accelerator-actuated switch, said pressure-actuated switch being in fluid communication with and sensitive to pressure changes in the hydraulic fluid on the down-shift circuit of said automatic transmission and providing automatic activation of said exhaust brake control device on the manual shifting of said transmission to a lower gear and release of pressure on said accelerator.
Dependencies are inferred from the claim text.