Patent ID: 8991345
Filing Date: 2015-03-31
Classification: F01L,Y02T

Abstract:
1. A valve timing adjusting device for adjusting a valve timing of an intake valve for opening and closing a cylinder of an internal combustion engine by pressure of a working liquid, the valve timing adjusting device comprising: a housing rotor that rotates in conjunction with a crankshaft of the internal combustion engine; a vane rotor that rotates in conjunction with a camshaft of the internal combustion engine and receives pressure of the working liquid in the housing rotor, thereby having a rotation phase changed with respect to the housing rotor; a main lock portion that has a main lock member and a main lock bore, wherein at a main lock phase of the rotation phase for closing the intake valve at a timing later than a timing when a piston in the cylinder reaches a bottom dead center, the main lock member is fitted in the main lock bore to thereby lock the rotation phase; a subordinate lock portion that has a subordinate lock member and a subordinate lock bore, wherein at a subordinate lock phase of the rotation phase advancing further than the main lock phase, the subordinate lock member is fitted in the subordinate lock bore to thereby lock the rotation phase; and a lock control portion that has a temperature sensing body to be expanded and contracted and a moving member to be reciprocated between a first position and a second position each of which positions the main lock member, wherein at the main lock phase in a warm stop state during which temperature of the stopped internal combustion engine becomes not less than a preset temperature, the temperature sensing body is changed to an expanded state, whereby the moving member is latched at the first position in which the main lock member is allowed to be fitted in the main lock bore, and wherein at the main lock phase in a cold stop state caused after the temperature of the stopped internal combustion engine becomes less than the preset temperature, the temperature sensing body is changed to a contracted state, whereby the moving member is unlatched and hence the moving member is moved to the second position in which the main lock member is released from being fitted in the main lock bore.