| abstract |
The present invention provides a failure detection device in a deceleration engine engine vehicle that can reliably detect failure by mainly monitoring the hydraulic pressure of the hydraulic fluid. The failure detection device of the present invention, by operating the hydraulic pressure of the hydraulic oil in the closing side path to close both of the intake valve and the exhaust valve to stop a portion of the cylinder, the hydraulic pressure of the operating oil on the closing release side path to operate the intake valve And a failure detecting device in a vehicle provided with a deceleration suspension engine capable of releasing both closed states of the exhaust valve and the exhaust valve, wherein the output value of the POIL sensor for detecting the oil pressure in the suspension release side path is operating oil in each vehicle driving state. When the oil pressure condition determining means (steps S204, S212) for determining whether the condition of the oil pressure threshold value of the oil pressure is satisfied and the oil pressure condition of the hydraulic oil are not satisfied by the oil pressure condition determination means are satisfied. And an abnormality judging means (steps S207, S215) for judging abnormality. |